libstdc++
simd.h
1// Definition of the public simd interfaces -*- C++ -*-
2
3// Copyright (C) 2020-2024 Free Software Foundation, Inc.
4//
5// This file is part of the GNU ISO C++ Library. This library is free
6// software; you can redistribute it and/or modify it under the
7// terms of the GNU General Public License as published by the
8// Free Software Foundation; either version 3, or (at your option)
9// any later version.
10
11// This library is distributed in the hope that it will be useful,
12// but WITHOUT ANY WARRANTY; without even the implied warranty of
13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14// GNU General Public License for more details.
15
16// Under Section 7 of GPL version 3, you are granted additional
17// permissions described in the GCC Runtime Library Exception, version
18// 3.1, as published by the Free Software Foundation.
19
20// You should have received a copy of the GNU General Public License and
21// a copy of the GCC Runtime Library Exception along with this program;
22// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23// <http://www.gnu.org/licenses/>.
24
25#ifndef _GLIBCXX_EXPERIMENTAL_SIMD_H
26#define _GLIBCXX_EXPERIMENTAL_SIMD_H
27
28#if __cplusplus >= 201703L
29
30#include "simd_detail.h"
31#include "numeric_traits.h"
32#include <bit>
33#include <bitset>
34#ifdef _GLIBCXX_DEBUG_UB
35#include <cstdio> // for stderr
36#endif
37#include <cstring>
38#include <cmath>
39#include <functional>
40#include <iosfwd>
41#include <utility>
42#include <algorithm>
43
44#if _GLIBCXX_SIMD_X86INTRIN
45#include <x86intrin.h>
46#elif _GLIBCXX_SIMD_HAVE_NEON
47#pragma GCC diagnostic push
48// narrowing conversion of '__a' from 'uint64_t' {aka 'long long unsigned int'} to
49// 'int64x1_t' {aka 'long long int'} [-Wnarrowing]
50#pragma GCC diagnostic ignored "-Wnarrowing"
51#include <arm_neon.h>
52#pragma GCC diagnostic pop
53#endif
54#if _GLIBCXX_SIMD_HAVE_SVE
55#include <arm_sve.h>
56#endif
57
58/** @ingroup ts_simd
59 * @{
60 */
61/* There are several closely related types, with the following naming
62 * convention:
63 * _Tp: vectorizable (arithmetic) type (or any type)
64 * _TV: __vector_type_t<_Tp, _Np>
65 * _TW: _SimdWrapper<_Tp, _Np>
66 * _TI: __intrinsic_type_t<_Tp, _Np>
67 * _TVT: _VectorTraits<_TV> or _VectorTraits<_TW>
68 * If one additional type is needed use _U instead of _T.
69 * Otherwise use _T\d, _TV\d, _TW\d, TI\d, _TVT\d.
70 *
71 * More naming conventions:
72 * _Ap or _Abi: An ABI tag from the simd_abi namespace
73 * _Ip: often used for integer types with sizeof(_Ip) == sizeof(_Tp),
74 * _IV, _IW as for _TV, _TW
75 * _Np: number of elements (not bytes)
76 * _Bytes: number of bytes
77 *
78 * Variable names:
79 * __k: mask object (vector- or bitmask)
80 */
81_GLIBCXX_SIMD_BEGIN_NAMESPACE
82
83#if !_GLIBCXX_SIMD_X86INTRIN
84using __m128 [[__gnu__::__vector_size__(16)]] = float;
85using __m128d [[__gnu__::__vector_size__(16)]] = double;
86using __m128i [[__gnu__::__vector_size__(16)]] = long long;
87using __m256 [[__gnu__::__vector_size__(32)]] = float;
88using __m256d [[__gnu__::__vector_size__(32)]] = double;
89using __m256i [[__gnu__::__vector_size__(32)]] = long long;
90using __m512 [[__gnu__::__vector_size__(64)]] = float;
91using __m512d [[__gnu__::__vector_size__(64)]] = double;
92using __m512i [[__gnu__::__vector_size__(64)]] = long long;
93#endif
94
95#if _GLIBCXX_SIMD_HAVE_SVE
96constexpr inline int __sve_vectorized_size_bytes = __ARM_FEATURE_SVE_BITS / 8;
97#else
98constexpr inline int __sve_vectorized_size_bytes = 0;
99#endif
100
101namespace simd_abi {
102// simd_abi forward declarations {{{
103// implementation details:
104struct _Scalar;
105
106template <int _Np>
107 struct _Fixed;
108
109// There are two major ABIs that appear on different architectures.
110// Both have non-boolean values packed into an N Byte register
111// -> #elements = N / sizeof(T)
112// Masks differ:
113// 1. Use value vector registers for masks (all 0 or all 1)
114// 2. Use bitmasks (mask registers) with one bit per value in the corresponding
115// value vector
116//
117// Both can be partially used, masking off the rest when doing horizontal
118// operations or operations that can trap (e.g. FP_INVALID or integer division
119// by 0). This is encoded as the number of used bytes.
120template <int _UsedBytes>
121 struct _VecBuiltin;
122
123template <int _UsedBytes>
124 struct _VecBltnBtmsk;
125
126template <int _UsedBytes, int _TotalBytes = __sve_vectorized_size_bytes>
127 struct _SveAbi;
128
129template <typename _Tp, int _Np>
130 using _VecN = _VecBuiltin<sizeof(_Tp) * _Np>;
131
132template <int _UsedBytes = 16>
133 using _Sse = _VecBuiltin<_UsedBytes>;
134
135template <int _UsedBytes = 32>
136 using _Avx = _VecBuiltin<_UsedBytes>;
137
138template <int _UsedBytes = 64>
139 using _Avx512 = _VecBltnBtmsk<_UsedBytes>;
140
141template <int _UsedBytes = 16>
142 using _Neon = _VecBuiltin<_UsedBytes>;
143
144template <int _UsedBytes = __sve_vectorized_size_bytes>
145 using _Sve = _SveAbi<_UsedBytes, __sve_vectorized_size_bytes>;
146
147// implementation-defined:
148using __sse = _Sse<>;
149using __avx = _Avx<>;
150using __avx512 = _Avx512<>;
151using __neon = _Neon<>;
152using __neon128 = _Neon<16>;
153using __neon64 = _Neon<8>;
154using __sve = _Sve<>;
155
156// standard:
157template <typename _Tp, size_t _Np, typename...>
158 struct deduce;
159
160template <int _Np>
161 using fixed_size = _Fixed<_Np>;
162
163using scalar = _Scalar;
164
165// }}}
166} // namespace simd_abi
167// forward declarations is_simd(_mask), simd(_mask), simd_size {{{
168template <typename _Tp>
169 struct is_simd;
170
171template <typename _Tp>
172 struct is_simd_mask;
173
174template <typename _Tp, typename _Abi>
175 class simd;
176
177template <typename _Tp, typename _Abi>
178 class simd_mask;
179
180template <typename _Tp, typename _Abi>
181 struct simd_size;
182
183// }}}
184// load/store flags {{{
185struct element_aligned_tag
186{
187 template <typename _Tp, typename _Up = typename _Tp::value_type>
188 static constexpr size_t _S_alignment = alignof(_Up);
189
190 template <typename _Tp, typename _Up>
191 _GLIBCXX_SIMD_INTRINSIC static constexpr _Up*
192 _S_apply(_Up* __ptr)
193 { return __ptr; }
194};
195
196struct vector_aligned_tag
197{
198 template <typename _Tp, typename _Up = typename _Tp::value_type>
199 static constexpr size_t _S_alignment
200 = std::__bit_ceil(sizeof(_Up) * _Tp::size());
201
202 template <typename _Tp, typename _Up>
203 _GLIBCXX_SIMD_INTRINSIC static constexpr _Up*
204 _S_apply(_Up* __ptr)
205 { return static_cast<_Up*>(__builtin_assume_aligned(__ptr, _S_alignment<_Tp, _Up>)); }
206};
207
208template <size_t _Np> struct overaligned_tag
209{
210 template <typename _Tp, typename _Up = typename _Tp::value_type>
211 static constexpr size_t _S_alignment = _Np;
212
213 template <typename _Tp, typename _Up>
214 _GLIBCXX_SIMD_INTRINSIC static constexpr _Up*
215 _S_apply(_Up* __ptr)
216 { return static_cast<_Up*>(__builtin_assume_aligned(__ptr, _Np)); }
217};
218
219inline constexpr element_aligned_tag element_aligned = {};
220
221inline constexpr vector_aligned_tag vector_aligned = {};
222
223template <size_t _Np>
224 inline constexpr overaligned_tag<_Np> overaligned = {};
225
226// }}}
227template <size_t _Xp>
228 using _SizeConstant = integral_constant<size_t, _Xp>;
229// constexpr feature detection{{{
230constexpr inline bool __have_mmx = _GLIBCXX_SIMD_HAVE_MMX;
231constexpr inline bool __have_sse = _GLIBCXX_SIMD_HAVE_SSE;
232constexpr inline bool __have_sse2 = _GLIBCXX_SIMD_HAVE_SSE2;
233constexpr inline bool __have_sse3 = _GLIBCXX_SIMD_HAVE_SSE3;
234constexpr inline bool __have_ssse3 = _GLIBCXX_SIMD_HAVE_SSSE3;
235constexpr inline bool __have_sse4_1 = _GLIBCXX_SIMD_HAVE_SSE4_1;
236constexpr inline bool __have_sse4_2 = _GLIBCXX_SIMD_HAVE_SSE4_2;
237constexpr inline bool __have_xop = _GLIBCXX_SIMD_HAVE_XOP;
238constexpr inline bool __have_avx = _GLIBCXX_SIMD_HAVE_AVX;
239constexpr inline bool __have_avx2 = _GLIBCXX_SIMD_HAVE_AVX2;
240constexpr inline bool __have_bmi = _GLIBCXX_SIMD_HAVE_BMI1;
241constexpr inline bool __have_bmi2 = _GLIBCXX_SIMD_HAVE_BMI2;
242constexpr inline bool __have_lzcnt = _GLIBCXX_SIMD_HAVE_LZCNT;
243constexpr inline bool __have_sse4a = _GLIBCXX_SIMD_HAVE_SSE4A;
244constexpr inline bool __have_fma = _GLIBCXX_SIMD_HAVE_FMA;
245constexpr inline bool __have_fma4 = _GLIBCXX_SIMD_HAVE_FMA4;
246constexpr inline bool __have_f16c = _GLIBCXX_SIMD_HAVE_F16C;
247constexpr inline bool __have_popcnt = _GLIBCXX_SIMD_HAVE_POPCNT;
248constexpr inline bool __have_avx512f = _GLIBCXX_SIMD_HAVE_AVX512F;
249constexpr inline bool __have_avx512dq = _GLIBCXX_SIMD_HAVE_AVX512DQ;
250constexpr inline bool __have_avx512vl = _GLIBCXX_SIMD_HAVE_AVX512VL;
251constexpr inline bool __have_avx512bw = _GLIBCXX_SIMD_HAVE_AVX512BW;
252constexpr inline bool __have_avx512dq_vl = __have_avx512dq && __have_avx512vl;
253constexpr inline bool __have_avx512bw_vl = __have_avx512bw && __have_avx512vl;
254constexpr inline bool __have_avx512bitalg = _GLIBCXX_SIMD_HAVE_AVX512BITALG;
255constexpr inline bool __have_avx512vbmi2 = _GLIBCXX_SIMD_HAVE_AVX512VBMI2;
256constexpr inline bool __have_avx512vbmi = _GLIBCXX_SIMD_HAVE_AVX512VBMI;
257constexpr inline bool __have_avx512ifma = _GLIBCXX_SIMD_HAVE_AVX512IFMA;
258constexpr inline bool __have_avx512cd = _GLIBCXX_SIMD_HAVE_AVX512CD;
259constexpr inline bool __have_avx512vnni = _GLIBCXX_SIMD_HAVE_AVX512VNNI;
260constexpr inline bool __have_avx512vpopcntdq = _GLIBCXX_SIMD_HAVE_AVX512VPOPCNTDQ;
261constexpr inline bool __have_avx512vp2intersect = _GLIBCXX_SIMD_HAVE_AVX512VP2INTERSECT;
262
263constexpr inline bool __have_neon = _GLIBCXX_SIMD_HAVE_NEON;
264constexpr inline bool __have_neon_a32 = _GLIBCXX_SIMD_HAVE_NEON_A32;
265constexpr inline bool __have_neon_a64 = _GLIBCXX_SIMD_HAVE_NEON_A64;
266constexpr inline bool __support_neon_float =
267#if defined __GCC_IEC_559
268 __GCC_IEC_559 == 0;
269#elif defined __FAST_MATH__
270 true;
271#else
272 false;
273#endif
274
275constexpr inline bool __have_sve = _GLIBCXX_SIMD_HAVE_SVE;
276constexpr inline bool __have_sve2 = _GLIBCXX_SIMD_HAVE_SVE2;
277
278#ifdef _ARCH_PWR10
279constexpr inline bool __have_power10vec = true;
280#else
281constexpr inline bool __have_power10vec = false;
282#endif
283#ifdef __POWER9_VECTOR__
284constexpr inline bool __have_power9vec = true;
285#else
286constexpr inline bool __have_power9vec = false;
287#endif
288#if defined __POWER8_VECTOR__
289constexpr inline bool __have_power8vec = true;
290#else
291constexpr inline bool __have_power8vec = __have_power9vec;
292#endif
293#if defined __VSX__
294constexpr inline bool __have_power_vsx = true;
295#else
296constexpr inline bool __have_power_vsx = __have_power8vec;
297#endif
298#if defined __ALTIVEC__
299constexpr inline bool __have_power_vmx = true;
300#else
301constexpr inline bool __have_power_vmx = __have_power_vsx;
302#endif
303
304// }}}
305
306namespace __detail
307{
308#ifdef math_errhandling
309 // Determines _S_handle_fpexcept from math_errhandling if it is defined and expands to a constant
310 // expression. math_errhandling may expand to an extern symbol, in which case a constexpr value
311 // must be guessed.
312 template <int = math_errhandling>
313 constexpr bool
314 __handle_fpexcept_impl(int)
315 { return math_errhandling & MATH_ERREXCEPT; }
316#endif
317
318 // Fallback if math_errhandling doesn't work: with fast-math assume floating-point exceptions are
319 // ignored, otherwise implement correct exception behavior.
320 constexpr bool
321 __handle_fpexcept_impl(float)
322 {
323#if defined __FAST_MATH__
324 return false;
325#else
326 return true;
327#endif
328 }
329
330 /// True if math functions must raise floating-point exceptions as specified by C17.
331 static constexpr bool _S_handle_fpexcept = __handle_fpexcept_impl(0);
332
333 constexpr std::uint_least64_t
334 __floating_point_flags()
335 {
336 std::uint_least64_t __flags = 0;
337 if constexpr (_S_handle_fpexcept)
338 __flags |= 1;
339#ifdef __FAST_MATH__
340 __flags |= 1 << 1;
341#elif __FINITE_MATH_ONLY__
342 __flags |= 2 << 1;
343#elif __GCC_IEC_559 < 2
344 __flags |= 3 << 1;
345#endif
346 __flags |= (__FLT_EVAL_METHOD__ + 1) << 3;
347 return __flags;
348 }
349
350 constexpr std::uint_least64_t
351 __machine_flags()
352 {
353 if constexpr (__have_mmx || __have_sse)
354 return __have_mmx
355 | (__have_sse << 1)
356 | (__have_sse2 << 2)
357 | (__have_sse3 << 3)
358 | (__have_ssse3 << 4)
359 | (__have_sse4_1 << 5)
360 | (__have_sse4_2 << 6)
361 | (__have_xop << 7)
362 | (__have_avx << 8)
363 | (__have_avx2 << 9)
364 | (__have_bmi << 10)
365 | (__have_bmi2 << 11)
366 | (__have_lzcnt << 12)
367 | (__have_sse4a << 13)
368 | (__have_fma << 14)
369 | (__have_fma4 << 15)
370 | (__have_f16c << 16)
371 | (__have_popcnt << 17)
372 | (__have_avx512f << 18)
373 | (__have_avx512dq << 19)
374 | (__have_avx512vl << 20)
375 | (__have_avx512bw << 21)
376 | (__have_avx512bitalg << 22)
377 | (__have_avx512vbmi2 << 23)
378 | (__have_avx512vbmi << 24)
379 | (__have_avx512ifma << 25)
380 | (__have_avx512cd << 26)
381 | (__have_avx512vnni << 27)
382 | (__have_avx512vpopcntdq << 28)
383 | (__have_avx512vp2intersect << 29);
384 else if constexpr (__have_neon || __have_sve)
385 return __have_neon
386 | (__have_neon_a32 << 1)
387 | (__have_neon_a64 << 2)
388 | (__have_neon_a64 << 2)
389 | (__support_neon_float << 3)
390 | (__have_sve << 4)
391 | (__have_sve2 << 5);
392 else if constexpr (__have_power_vmx)
393 return __have_power_vmx
394 | (__have_power_vsx << 1)
395 | (__have_power8vec << 2)
396 | (__have_power9vec << 3)
397 | (__have_power10vec << 4);
398 else
399 return 0;
400 }
401
402 namespace
403 {
404 struct _OdrEnforcer {};
405 }
406
407 template <std::uint_least64_t...>
408 struct _MachineFlagsTemplate {};
409
410 /**@internal
411 * Use this type as default template argument to all function templates that
412 * are not declared always_inline. It ensures, that a function
413 * specialization, which the compiler decides not to inline, has a unique symbol
414 * (_OdrEnforcer) or a symbol matching the machine/architecture flags
415 * (_MachineFlagsTemplate). This helps to avoid ODR violations in cases where
416 * users link TUs compiled with different flags. This is especially important
417 * for using simd in libraries.
418 */
419 using __odr_helper
420 = conditional_t<__machine_flags() == 0, _OdrEnforcer,
421 _MachineFlagsTemplate<__machine_flags(), __floating_point_flags()>>;
422
423 struct _Minimum
424 {
425 template <typename _Tp>
426 _GLIBCXX_SIMD_INTRINSIC constexpr
427 _Tp
428 operator()(_Tp __a, _Tp __b) const
429 {
430 using std::min;
431 return min(__a, __b);
432 }
433 };
434
435 struct _Maximum
436 {
437 template <typename _Tp>
438 _GLIBCXX_SIMD_INTRINSIC constexpr
439 _Tp
440 operator()(_Tp __a, _Tp __b) const
441 {
442 using std::max;
443 return max(__a, __b);
444 }
445 };
446} // namespace __detail
447
448// unrolled/pack execution helpers
449// __execute_n_times{{{
450template <typename _Fp, size_t... _I>
451 [[__gnu__::__flatten__]] _GLIBCXX_SIMD_INTRINSIC constexpr
452 void
453 __execute_on_index_sequence(_Fp&& __f, index_sequence<_I...>)
454 { ((void)__f(_SizeConstant<_I>()), ...); }
455
456template <typename _Fp>
457 _GLIBCXX_SIMD_INTRINSIC constexpr void
458 __execute_on_index_sequence(_Fp&&, index_sequence<>)
459 { }
460
461template <size_t _Np, typename _Fp>
462 _GLIBCXX_SIMD_INTRINSIC constexpr void
463 __execute_n_times(_Fp&& __f)
464 {
465 __execute_on_index_sequence(static_cast<_Fp&&>(__f),
466 make_index_sequence<_Np>{});
467 }
468
469// }}}
470// __generate_from_n_evaluations{{{
471template <typename _R, typename _Fp, size_t... _I>
472 [[__gnu__::__flatten__]] _GLIBCXX_SIMD_INTRINSIC constexpr
473 _R
474 __execute_on_index_sequence_with_return(_Fp&& __f, index_sequence<_I...>)
475 { return _R{__f(_SizeConstant<_I>())...}; }
476
477template <size_t _Np, typename _R, typename _Fp>
478 _GLIBCXX_SIMD_INTRINSIC constexpr _R
479 __generate_from_n_evaluations(_Fp&& __f)
480 {
481 return __execute_on_index_sequence_with_return<_R>(
482 static_cast<_Fp&&>(__f), make_index_sequence<_Np>{});
483 }
484
485// }}}
486// __call_with_n_evaluations{{{
487template <size_t... _I, typename _F0, typename _FArgs>
488 [[__gnu__::__flatten__]] _GLIBCXX_SIMD_INTRINSIC constexpr
489 auto
490 __call_with_n_evaluations(index_sequence<_I...>, _F0&& __f0, _FArgs&& __fargs)
491 { return __f0(__fargs(_SizeConstant<_I>())...); }
492
493template <size_t _Np, typename _F0, typename _FArgs>
494 _GLIBCXX_SIMD_INTRINSIC constexpr auto
495 __call_with_n_evaluations(_F0&& __f0, _FArgs&& __fargs)
496 {
497 return __call_with_n_evaluations(make_index_sequence<_Np>{},
498 static_cast<_F0&&>(__f0),
499 static_cast<_FArgs&&>(__fargs));
500 }
501
502// }}}
503// __call_with_subscripts{{{
504template <size_t _First = 0, size_t... _It, typename _Tp, typename _Fp>
505 [[__gnu__::__flatten__]] _GLIBCXX_SIMD_INTRINSIC constexpr
506 auto
507 __call_with_subscripts(_Tp&& __x, index_sequence<_It...>, _Fp&& __fun)
508 { return __fun(__x[_First + _It]...); }
509
510template <size_t _Np, size_t _First = 0, typename _Tp, typename _Fp>
511 _GLIBCXX_SIMD_INTRINSIC constexpr auto
512 __call_with_subscripts(_Tp&& __x, _Fp&& __fun)
513 {
514 return __call_with_subscripts<_First>(static_cast<_Tp&&>(__x),
515 make_index_sequence<_Np>(),
516 static_cast<_Fp&&>(__fun));
517 }
518
519// }}}
520
521// vvv ---- type traits ---- vvv
522// integer type aliases{{{
523using _UChar = unsigned char;
524using _SChar = signed char;
525using _UShort = unsigned short;
526using _UInt = unsigned int;
527using _ULong = unsigned long;
528using _ULLong = unsigned long long;
529using _LLong = long long;
530
531//}}}
532// __first_of_pack{{{
533template <typename _T0, typename...>
534 struct __first_of_pack
535 { using type = _T0; };
536
537template <typename... _Ts>
538 using __first_of_pack_t = typename __first_of_pack<_Ts...>::type;
539
540//}}}
541// __value_type_or_identity_t {{{
542template <typename _Tp>
543 typename _Tp::value_type
544 __value_type_or_identity_impl(int);
545
546template <typename _Tp>
547 _Tp
548 __value_type_or_identity_impl(float);
549
550template <typename _Tp>
551 using __value_type_or_identity_t
552 = decltype(__value_type_or_identity_impl<_Tp>(int()));
553
554// }}}
555// __is_vectorizable {{{
556template <typename _Tp>
557 struct __is_vectorizable : public is_arithmetic<_Tp> {};
558
559template <>
560 struct __is_vectorizable<bool> : public false_type {};
561
562template <typename _Tp>
563 inline constexpr bool __is_vectorizable_v = __is_vectorizable<_Tp>::value;
564
565// Deduces to a vectorizable type
566template <typename _Tp, typename = enable_if_t<__is_vectorizable_v<_Tp>>>
567 using _Vectorizable = _Tp;
568
569// }}}
570// _LoadStorePtr / __is_possible_loadstore_conversion {{{
571template <typename _Ptr, typename _ValueType>
572 struct __is_possible_loadstore_conversion
573 : conjunction<__is_vectorizable<_Ptr>, __is_vectorizable<_ValueType>> {};
574
575template <>
576 struct __is_possible_loadstore_conversion<bool, bool> : true_type {};
577
578// Deduces to a type allowed for load/store with the given value type.
579template <typename _Ptr, typename _ValueType,
580 typename = enable_if_t<
581 __is_possible_loadstore_conversion<_Ptr, _ValueType>::value>>
582 using _LoadStorePtr = _Ptr;
583
584// }}}
585// __is_bitmask{{{
586template <typename _Tp, typename = void_t<>>
587 struct __is_bitmask : false_type {};
588
589template <typename _Tp>
590 inline constexpr bool __is_bitmask_v = __is_bitmask<_Tp>::value;
591
592// the __mmaskXX case:
593template <typename _Tp>
594 struct __is_bitmask<_Tp,
595 void_t<decltype(declval<unsigned&>() = declval<_Tp>() & 1u)>>
596 : true_type {};
597
598// }}}
599// __int_for_sizeof{{{
600#pragma GCC diagnostic push
601#pragma GCC diagnostic ignored "-Wpedantic"
602template <size_t _Bytes>
603 constexpr auto
604 __int_for_sizeof()
605 {
606 static_assert(_Bytes > 0);
607 if constexpr (_Bytes == sizeof(int))
608 return int();
609 else if constexpr (_Bytes == sizeof(_SChar))
610 return _SChar();
611 else if constexpr (_Bytes == sizeof(short))
612 return short();
613 else if constexpr (_Bytes == sizeof(long))
614 return long();
615 else if constexpr (_Bytes == sizeof(_LLong))
616 return _LLong();
617 #ifdef __SIZEOF_INT128__
618 else if constexpr (_Bytes == sizeof(__int128))
619 return __int128();
620 #endif // __SIZEOF_INT128__
621 else if constexpr (_Bytes % sizeof(int) == 0)
622 {
623 constexpr size_t _Np = _Bytes / sizeof(int);
624 struct _Ip
625 {
626 int _M_data[_Np];
627
628 _GLIBCXX_SIMD_INTRINSIC constexpr _Ip
629 operator&(_Ip __rhs) const
630 {
631 return __generate_from_n_evaluations<_Np, _Ip>(
632 [&](auto __i) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
633 return __rhs._M_data[__i] & _M_data[__i];
634 });
635 }
636
637 _GLIBCXX_SIMD_INTRINSIC constexpr _Ip
638 operator|(_Ip __rhs) const
639 {
640 return __generate_from_n_evaluations<_Np, _Ip>(
641 [&](auto __i) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
642 return __rhs._M_data[__i] | _M_data[__i];
643 });
644 }
645
646 _GLIBCXX_SIMD_INTRINSIC constexpr _Ip
647 operator^(_Ip __rhs) const
648 {
649 return __generate_from_n_evaluations<_Np, _Ip>(
650 [&](auto __i) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
651 return __rhs._M_data[__i] ^ _M_data[__i];
652 });
653 }
654
655 _GLIBCXX_SIMD_INTRINSIC constexpr _Ip
656 operator~() const
657 {
658 return __generate_from_n_evaluations<_Np, _Ip>(
659 [&](auto __i) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA { return ~_M_data[__i]; });
660 }
661 };
662 return _Ip{};
663 }
664 else
665 static_assert(_Bytes == 0, "this should be unreachable");
666 }
667#pragma GCC diagnostic pop
668
669template <typename _Tp>
670 using __int_for_sizeof_t = decltype(__int_for_sizeof<sizeof(_Tp)>());
671
672template <size_t _Np>
673 using __int_with_sizeof_t = decltype(__int_for_sizeof<_Np>());
674
675// }}}
676// __is_fixed_size_abi{{{
677template <typename _Tp>
678 struct __is_fixed_size_abi : false_type {};
679
680template <int _Np>
681 struct __is_fixed_size_abi<simd_abi::fixed_size<_Np>> : true_type {};
682
683template <typename _Tp>
684 inline constexpr bool __is_fixed_size_abi_v = __is_fixed_size_abi<_Tp>::value;
685
686// }}}
687// __is_scalar_abi {{{
688template <typename _Abi>
689 constexpr bool
690 __is_scalar_abi()
691 { return is_same_v<simd_abi::scalar, _Abi>; }
692
693// }}}
694// __abi_bytes_v {{{
695template <template <int> class _Abi, int _Bytes>
696 constexpr int
697 __abi_bytes_impl(_Abi<_Bytes>*)
698 { return _Bytes; }
699
700template <typename _Tp>
701 constexpr int
702 __abi_bytes_impl(_Tp*)
703 { return -1; }
704
705template <typename _Abi>
706 inline constexpr int __abi_bytes_v
707 = __abi_bytes_impl(static_cast<_Abi*>(nullptr));
708
709// }}}
710// __is_builtin_bitmask_abi {{{
711template <typename _Abi>
712 constexpr bool
713 __is_builtin_bitmask_abi()
714 { return is_same_v<simd_abi::_VecBltnBtmsk<__abi_bytes_v<_Abi>>, _Abi>; }
715
716// }}}
717// __is_sse_abi {{{
718template <typename _Abi>
719 constexpr bool
720 __is_sse_abi()
721 {
722 constexpr auto _Bytes = __abi_bytes_v<_Abi>;
723 return _Bytes <= 16 && is_same_v<simd_abi::_VecBuiltin<_Bytes>, _Abi>;
724 }
725
726// }}}
727// __is_avx_abi {{{
728template <typename _Abi>
729 constexpr bool
730 __is_avx_abi()
731 {
732 constexpr auto _Bytes = __abi_bytes_v<_Abi>;
733 return _Bytes > 16 && _Bytes <= 32
734 && is_same_v<simd_abi::_VecBuiltin<_Bytes>, _Abi>;
735 }
736
737// }}}
738// __is_avx512_abi {{{
739template <typename _Abi>
740 constexpr bool
741 __is_avx512_abi()
742 {
743 constexpr auto _Bytes = __abi_bytes_v<_Abi>;
744 return _Bytes <= 64 && is_same_v<simd_abi::_Avx512<_Bytes>, _Abi>;
745 }
746
747// }}}
748// __is_neon_abi {{{
749template <typename _Abi>
750 constexpr bool
751 __is_neon_abi()
752 {
753 constexpr auto _Bytes = __abi_bytes_v<_Abi>;
754 return _Bytes <= 16 && is_same_v<simd_abi::_VecBuiltin<_Bytes>, _Abi>;
755 }
756
757// }}}
758// __is_sve_abi {{{
759template <typename _Abi>
760 constexpr bool
761 __is_sve_abi()
762 {
763 constexpr auto _Bytes = __abi_bytes_v<_Abi>;
764 return _Bytes <= __sve_vectorized_size_bytes && is_same_v<simd_abi::_Sve<_Bytes>, _Abi>;
765 }
766
767// }}}
768// __make_dependent_t {{{
769template <typename, typename _Up>
770 struct __make_dependent
771 { using type = _Up; };
772
773template <typename _Tp, typename _Up>
774 using __make_dependent_t = typename __make_dependent<_Tp, _Up>::type;
775
776// }}}
777// ^^^ ---- type traits ---- ^^^
778
779// __invoke_ub{{{
780template <typename... _Args>
781 [[noreturn]] _GLIBCXX_SIMD_ALWAYS_INLINE void
782 __invoke_ub([[maybe_unused]] const char* __msg, [[maybe_unused]] const _Args&... __args)
783 {
784#ifdef _GLIBCXX_DEBUG_UB
785 __builtin_fprintf(stderr, __msg, __args...);
786 __builtin_trap();
787#else
788 __builtin_unreachable();
789#endif
790 }
791
792// }}}
793// __assert_unreachable{{{
794template <typename _Tp>
795 struct __assert_unreachable
796 { static_assert(!is_same_v<_Tp, _Tp>, "this should be unreachable"); };
797
798// }}}
799// __size_or_zero_v {{{
800template <typename _Tp, typename _Ap, size_t _Np = simd_size<_Tp, _Ap>::value>
801 constexpr size_t
802 __size_or_zero_dispatch(int)
803 { return _Np; }
804
805template <typename _Tp, typename _Ap>
806 constexpr size_t
807 __size_or_zero_dispatch(float)
808 { return 0; }
809
810template <typename _Tp, typename _Ap>
811 inline constexpr size_t __size_or_zero_v
812 = __size_or_zero_dispatch<_Tp, _Ap>(0);
813
814// }}}
815// __div_roundup {{{
816inline constexpr size_t
817__div_roundup(size_t __a, size_t __b)
818{ return (__a + __b - 1) / __b; }
819
820// }}}
821// _ExactBool{{{
822class _ExactBool
823{
824 const bool _M_data;
825
826public:
827 _GLIBCXX_SIMD_INTRINSIC constexpr
828 _ExactBool(bool __b) : _M_data(__b) {}
829
830 _ExactBool(int) = delete;
831
832 _GLIBCXX_SIMD_INTRINSIC constexpr
833 operator bool() const
834 { return _M_data; }
835};
836
837// }}}
838// __may_alias{{{
839/**@internal
840 * Helper __may_alias<_Tp> that turns _Tp into the type to be used for an
841 * aliasing pointer. This adds the __may_alias attribute to _Tp (with compilers
842 * that support it).
843 */
844template <typename _Tp>
845 using __may_alias [[__gnu__::__may_alias__]] = _Tp;
846
847// }}}
848// _UnsupportedBase {{{
849// simd and simd_mask base for unsupported <_Tp, _Abi>
850struct _UnsupportedBase
851{
852 _UnsupportedBase() = delete;
853 _UnsupportedBase(const _UnsupportedBase&) = delete;
854 _UnsupportedBase& operator=(const _UnsupportedBase&) = delete;
855 ~_UnsupportedBase() = delete;
856};
857
858// }}}
859// _InvalidTraits {{{
860/**
861 * @internal
862 * Defines the implementation of __a given <_Tp, _Abi>.
863 *
864 * Implementations must ensure that only valid <_Tp, _Abi> instantiations are
865 * possible. Static assertions in the type definition do not suffice. It is
866 * important that SFINAE works.
867 */
868struct _InvalidTraits
869{
870 using _IsValid = false_type;
871 using _SimdBase = _UnsupportedBase;
872 using _MaskBase = _UnsupportedBase;
873
874 static constexpr size_t _S_full_size = 0;
875 static constexpr bool _S_is_partial = false;
876
877 static constexpr size_t _S_simd_align = 1;
878 struct _SimdImpl;
879 struct _SimdMember {};
880 struct _SimdCastType;
881
882 static constexpr size_t _S_mask_align = 1;
883 struct _MaskImpl;
884 struct _MaskMember {};
885 struct _MaskCastType;
886};
887
888// }}}
889// _SimdTraits {{{
890template <typename _Tp, typename _Abi, typename = void_t<>>
891 struct _SimdTraits : _InvalidTraits {};
892
893// }}}
894// __private_init, __bitset_init{{{
895/**
896 * @internal
897 * Tag used for private init constructor of simd and simd_mask
898 */
899inline constexpr struct _PrivateInit {} __private_init = {};
900
901inline constexpr struct _BitsetInit {} __bitset_init = {};
902
903// }}}
904// __is_narrowing_conversion<_From, _To>{{{
905template <typename _From, typename _To, bool = is_arithmetic_v<_From>,
906 bool = is_arithmetic_v<_To>>
907 struct __is_narrowing_conversion;
908
909// ignore "signed/unsigned mismatch" in the following trait.
910// The implicit conversions will do the right thing here.
911template <typename _From, typename _To>
912 struct __is_narrowing_conversion<_From, _To, true, true>
913 : public __bool_constant<(
914 __digits_v<_From> > __digits_v<_To>
915 || __finite_max_v<_From> > __finite_max_v<_To>
916 || __finite_min_v<_From> < __finite_min_v<_To>
917 || (is_signed_v<_From> && is_unsigned_v<_To>))> {};
918
919template <typename _Tp>
920 struct __is_narrowing_conversion<_Tp, bool, true, true>
921 : public true_type {};
922
923template <>
924 struct __is_narrowing_conversion<bool, bool, true, true>
925 : public false_type {};
926
927template <typename _Tp>
928 struct __is_narrowing_conversion<_Tp, _Tp, true, true>
929 : public false_type {};
930
931template <typename _From, typename _To>
932 struct __is_narrowing_conversion<_From, _To, false, true>
933 : public negation<is_convertible<_From, _To>> {};
934
935// }}}
936// __converts_to_higher_integer_rank{{{
937template <typename _From, typename _To, bool = (sizeof(_From) < sizeof(_To))>
938 struct __converts_to_higher_integer_rank : public true_type {};
939
940// this may fail for char -> short if sizeof(char) == sizeof(short)
941template <typename _From, typename _To>
942 struct __converts_to_higher_integer_rank<_From, _To, false>
943 : public is_same<decltype(declval<_From>() + declval<_To>()), _To> {};
944
945// }}}
946// __data(simd/simd_mask) {{{
947template <typename _Tp, typename _Ap>
948 _GLIBCXX_SIMD_INTRINSIC constexpr const auto&
949 __data(const simd<_Tp, _Ap>& __x);
950
951template <typename _Tp, typename _Ap>
952 _GLIBCXX_SIMD_INTRINSIC constexpr auto&
953 __data(simd<_Tp, _Ap>& __x);
954
955template <typename _Tp, typename _Ap>
956 _GLIBCXX_SIMD_INTRINSIC constexpr const auto&
957 __data(const simd_mask<_Tp, _Ap>& __x);
958
959template <typename _Tp, typename _Ap>
960 _GLIBCXX_SIMD_INTRINSIC constexpr auto&
961 __data(simd_mask<_Tp, _Ap>& __x);
962
963// }}}
964// _SimdConverter {{{
965template <typename _FromT, typename _FromA, typename _ToT, typename _ToA,
966 typename = void>
967 struct _SimdConverter;
968
969template <typename _Tp, typename _Ap>
970 struct _SimdConverter<_Tp, _Ap, _Tp, _Ap, void>
971 {
972 template <typename _Up>
973 _GLIBCXX_SIMD_INTRINSIC const _Up&
974 operator()(const _Up& __x)
975 { return __x; }
976 };
977
978// }}}
979// __to_value_type_or_member_type {{{
980template <typename _V>
981 _GLIBCXX_SIMD_INTRINSIC constexpr auto
982 __to_value_type_or_member_type(const _V& __x) -> decltype(__data(__x))
983 { return __data(__x); }
984
985template <typename _V>
986 _GLIBCXX_SIMD_INTRINSIC constexpr const typename _V::value_type&
987 __to_value_type_or_member_type(const typename _V::value_type& __x)
988 { return __x; }
989
990// }}}
991// __bool_storage_member_type{{{
992template <size_t _Size>
993 struct __bool_storage_member_type;
994
995template <size_t _Size>
996 using __bool_storage_member_type_t =
997 typename __bool_storage_member_type<_Size>::type;
998
999// }}}
1000// _SimdTuple {{{
1001// why not tuple?
1002// 1. tuple gives no guarantee about the storage order, but I require
1003// storage
1004// equivalent to array<_Tp, _Np>
1005// 2. direct access to the element type (first template argument)
1006// 3. enforces equal element type, only different _Abi types are allowed
1007template <typename _Tp, typename... _Abis>
1008 struct _SimdTuple;
1009
1010//}}}
1011// __fixed_size_storage_t {{{
1012template <typename _Tp, int _Np>
1013 struct __fixed_size_storage;
1014
1015template <typename _Tp, int _Np>
1016 using __fixed_size_storage_t = typename __fixed_size_storage<_Tp, _Np>::type;
1017
1018// }}}
1019// _SimdWrapper fwd decl{{{
1020template <typename _Tp, size_t _Size, typename = void_t<>>
1021 struct _SimdWrapper;
1022
1023template <typename _Tp>
1024 using _SimdWrapper8 = _SimdWrapper<_Tp, 8 / sizeof(_Tp)>;
1025template <typename _Tp>
1026 using _SimdWrapper16 = _SimdWrapper<_Tp, 16 / sizeof(_Tp)>;
1027template <typename _Tp>
1028 using _SimdWrapper32 = _SimdWrapper<_Tp, 32 / sizeof(_Tp)>;
1029template <typename _Tp>
1030 using _SimdWrapper64 = _SimdWrapper<_Tp, 64 / sizeof(_Tp)>;
1031
1032template <typename _Tp, size_t _Width>
1033 struct _SveSimdWrapper;
1034
1035// }}}
1036// __is_simd_wrapper {{{
1037template <typename _Tp>
1038 struct __is_simd_wrapper : false_type {};
1039
1040template <typename _Tp, size_t _Np>
1041 struct __is_simd_wrapper<_SimdWrapper<_Tp, _Np>> : true_type {};
1042
1043template <typename _Tp>
1044 inline constexpr bool __is_simd_wrapper_v = __is_simd_wrapper<_Tp>::value;
1045
1046// }}}
1047// _BitOps {{{
1048struct _BitOps
1049{
1050 // _S_bit_iteration {{{
1051 template <typename _Tp, typename _Fp>
1052 static void
1053 _S_bit_iteration(_Tp __mask, _Fp&& __f)
1054 {
1055 static_assert(sizeof(_ULLong) >= sizeof(_Tp));
1056 conditional_t<sizeof(_Tp) <= sizeof(_UInt), _UInt, _ULLong> __k;
1057 if constexpr (is_convertible_v<_Tp, decltype(__k)>)
1058 __k = __mask;
1059 else
1060 __k = __mask.to_ullong();
1061 while(__k)
1062 {
1063 __f(std::__countr_zero(__k));
1064 __k &= (__k - 1);
1065 }
1066 }
1067
1068 //}}}
1069};
1070
1071//}}}
1072// __increment, __decrement {{{
1073template <typename _Tp = void>
1074 struct __increment
1075 { constexpr _Tp operator()(_Tp __a) const { return ++__a; } };
1076
1077template <>
1078 struct __increment<void>
1079 {
1080 template <typename _Tp>
1081 constexpr _Tp
1082 operator()(_Tp __a) const
1083 { return ++__a; }
1084 };
1085
1086template <typename _Tp = void>
1087 struct __decrement
1088 { constexpr _Tp operator()(_Tp __a) const { return --__a; } };
1089
1090template <>
1091 struct __decrement<void>
1092 {
1093 template <typename _Tp>
1094 constexpr _Tp
1095 operator()(_Tp __a) const
1096 { return --__a; }
1097 };
1098
1099// }}}
1100// _ValuePreserving(OrInt) {{{
1101template <typename _From, typename _To,
1102 typename = enable_if_t<negation<
1103 __is_narrowing_conversion<__remove_cvref_t<_From>, _To>>::value>>
1104 using _ValuePreserving = _From;
1105
1106template <typename _From, typename _To,
1107 typename _DecayedFrom = __remove_cvref_t<_From>,
1108 typename = enable_if_t<conjunction<
1109 is_convertible<_From, _To>,
1110 disjunction<
1111 is_same<_DecayedFrom, _To>, is_same<_DecayedFrom, int>,
1112 conjunction<is_same<_DecayedFrom, _UInt>, is_unsigned<_To>>,
1113 negation<__is_narrowing_conversion<_DecayedFrom, _To>>>>::value>>
1114 using _ValuePreservingOrInt = _From;
1115
1116// }}}
1117// __intrinsic_type {{{
1118template <typename _Tp, size_t _Bytes, typename = void_t<>>
1119 struct __intrinsic_type;
1120
1121template <typename _Tp, size_t _Size>
1122 using __intrinsic_type_t =
1123 typename __intrinsic_type<_Tp, _Size * sizeof(_Tp)>::type;
1124
1125template <typename _Tp>
1126 using __intrinsic_type2_t = typename __intrinsic_type<_Tp, 2>::type;
1127template <typename _Tp>
1128 using __intrinsic_type4_t = typename __intrinsic_type<_Tp, 4>::type;
1129template <typename _Tp>
1130 using __intrinsic_type8_t = typename __intrinsic_type<_Tp, 8>::type;
1131template <typename _Tp>
1132 using __intrinsic_type16_t = typename __intrinsic_type<_Tp, 16>::type;
1133template <typename _Tp>
1134 using __intrinsic_type32_t = typename __intrinsic_type<_Tp, 32>::type;
1135template <typename _Tp>
1136 using __intrinsic_type64_t = typename __intrinsic_type<_Tp, 64>::type;
1137
1138// }}}
1139// _BitMask {{{
1140template <size_t _Np, bool _Sanitized = false>
1141 struct _BitMask;
1142
1143template <size_t _Np, bool _Sanitized>
1144 struct __is_bitmask<_BitMask<_Np, _Sanitized>, void> : true_type {};
1145
1146template <size_t _Np>
1147 using _SanitizedBitMask = _BitMask<_Np, true>;
1148
1149template <size_t _Np, bool _Sanitized>
1150 struct _BitMask
1151 {
1152 static_assert(_Np > 0);
1153
1154 static constexpr size_t _NBytes = __div_roundup(_Np, __CHAR_BIT__);
1155
1156 using _Tp = conditional_t<_Np == 1, bool,
1157 make_unsigned_t<__int_with_sizeof_t<std::min(
1158 sizeof(_ULLong), std::__bit_ceil(_NBytes))>>>;
1159
1160 static constexpr int _S_array_size = __div_roundup(_NBytes, sizeof(_Tp));
1161
1162 _Tp _M_bits[_S_array_size];
1163
1164 static constexpr int _S_unused_bits
1165 = _Np == 1 ? 0 : _S_array_size * sizeof(_Tp) * __CHAR_BIT__ - _Np;
1166
1167 static constexpr _Tp _S_bitmask = +_Tp(~_Tp()) >> _S_unused_bits;
1168
1169 constexpr _BitMask() noexcept = default;
1170
1171 constexpr _BitMask(unsigned long long __x) noexcept
1172 : _M_bits{static_cast<_Tp>(__x)} {}
1173
1174 _BitMask(bitset<_Np> __x) noexcept : _BitMask(__x.to_ullong()) {}
1175
1176 constexpr _BitMask(const _BitMask&) noexcept = default;
1177
1178 template <bool _RhsSanitized, typename = enable_if_t<_RhsSanitized == false
1179 && _Sanitized == true>>
1180 constexpr _BitMask(const _BitMask<_Np, _RhsSanitized>& __rhs) noexcept
1181 : _BitMask(__rhs._M_sanitized()) {}
1182
1183 constexpr operator _SimdWrapper<bool, _Np>() const noexcept
1184 {
1185 static_assert(_S_array_size == 1);
1186 return _M_bits[0];
1187 }
1188
1189 // precondition: is sanitized
1190 constexpr _Tp
1191 _M_to_bits() const noexcept
1192 {
1193 static_assert(_S_array_size == 1);
1194 return _M_bits[0];
1195 }
1196
1197 // precondition: is sanitized
1198 constexpr unsigned long long
1199 to_ullong() const noexcept
1200 {
1201 static_assert(_S_array_size == 1);
1202 return _M_bits[0];
1203 }
1204
1205 // precondition: is sanitized
1206 constexpr unsigned long
1207 to_ulong() const noexcept
1208 {
1209 static_assert(_S_array_size == 1);
1210 return _M_bits[0];
1211 }
1212
1213 constexpr bitset<_Np>
1214 _M_to_bitset() const noexcept
1215 {
1216 static_assert(_S_array_size == 1);
1217 return _M_bits[0];
1218 }
1219
1220 constexpr decltype(auto)
1221 _M_sanitized() const noexcept
1222 {
1223 if constexpr (_Sanitized)
1224 return *this;
1225 else if constexpr (_Np == 1)
1226 return _SanitizedBitMask<_Np>(_M_bits[0]);
1227 else
1228 {
1229 _SanitizedBitMask<_Np> __r = {};
1230 for (int __i = 0; __i < _S_array_size; ++__i)
1231 __r._M_bits[__i] = _M_bits[__i];
1232 if constexpr (_S_unused_bits > 0)
1233 __r._M_bits[_S_array_size - 1] &= _S_bitmask;
1234 return __r;
1235 }
1236 }
1237
1238 template <size_t _Mp, bool _LSanitized>
1239 constexpr _BitMask<_Np + _Mp, _Sanitized>
1240 _M_prepend(_BitMask<_Mp, _LSanitized> __lsb) const noexcept
1241 {
1242 constexpr size_t _RN = _Np + _Mp;
1243 using _Rp = _BitMask<_RN, _Sanitized>;
1244 if constexpr (_Rp::_S_array_size == 1)
1245 {
1246 _Rp __r{{_M_bits[0]}};
1247 __r._M_bits[0] <<= _Mp;
1248 __r._M_bits[0] |= __lsb._M_sanitized()._M_bits[0];
1249 return __r;
1250 }
1251 else
1252 __assert_unreachable<_Rp>();
1253 }
1254
1255 // Return a new _BitMask with size _NewSize while dropping _DropLsb least
1256 // significant bits. If the operation implicitly produces a sanitized bitmask,
1257 // the result type will have _Sanitized set.
1258 template <size_t _DropLsb, size_t _NewSize = _Np - _DropLsb>
1259 constexpr auto
1260 _M_extract() const noexcept
1261 {
1262 static_assert(_Np > _DropLsb);
1263 static_assert(_DropLsb + _NewSize <= sizeof(_ULLong) * __CHAR_BIT__,
1264 "not implemented for bitmasks larger than one ullong");
1265 if constexpr (_NewSize == 1)
1266 // must sanitize because the return _Tp is bool
1267 return _SanitizedBitMask<1>(_M_bits[0] & (_Tp(1) << _DropLsb));
1268 else
1269 return _BitMask<_NewSize,
1270 ((_NewSize + _DropLsb == sizeof(_Tp) * __CHAR_BIT__
1271 && _NewSize + _DropLsb <= _Np)
1272 || ((_Sanitized || _Np == sizeof(_Tp) * __CHAR_BIT__)
1273 && _NewSize + _DropLsb >= _Np))>(_M_bits[0]
1274 >> _DropLsb);
1275 }
1276
1277 // True if all bits are set. Implicitly sanitizes if _Sanitized == false.
1278 constexpr bool
1279 all() const noexcept
1280 {
1281 if constexpr (_Np == 1)
1282 return _M_bits[0];
1283 else if constexpr (!_Sanitized)
1284 return _M_sanitized().all();
1285 else
1286 {
1287 constexpr _Tp __allbits = ~_Tp();
1288 for (int __i = 0; __i < _S_array_size - 1; ++__i)
1289 if (_M_bits[__i] != __allbits)
1290 return false;
1291 return _M_bits[_S_array_size - 1] == _S_bitmask;
1292 }
1293 }
1294
1295 // True if at least one bit is set. Implicitly sanitizes if _Sanitized ==
1296 // false.
1297 constexpr bool
1298 any() const noexcept
1299 {
1300 if constexpr (_Np == 1)
1301 return _M_bits[0];
1302 else if constexpr (!_Sanitized)
1303 return _M_sanitized().any();
1304 else
1305 {
1306 for (int __i = 0; __i < _S_array_size - 1; ++__i)
1307 if (_M_bits[__i] != 0)
1308 return true;
1309 return _M_bits[_S_array_size - 1] != 0;
1310 }
1311 }
1312
1313 // True if no bit is set. Implicitly sanitizes if _Sanitized == false.
1314 constexpr bool
1315 none() const noexcept
1316 {
1317 if constexpr (_Np == 1)
1318 return !_M_bits[0];
1319 else if constexpr (!_Sanitized)
1320 return _M_sanitized().none();
1321 else
1322 {
1323 for (int __i = 0; __i < _S_array_size - 1; ++__i)
1324 if (_M_bits[__i] != 0)
1325 return false;
1326 return _M_bits[_S_array_size - 1] == 0;
1327 }
1328 }
1329
1330 // Returns the number of set bits. Implicitly sanitizes if _Sanitized ==
1331 // false.
1332 constexpr int
1333 count() const noexcept
1334 {
1335 if constexpr (_Np == 1)
1336 return _M_bits[0];
1337 else if constexpr (!_Sanitized)
1338 return _M_sanitized().none();
1339 else
1340 {
1341 int __result = __builtin_popcountll(_M_bits[0]);
1342 for (int __i = 1; __i < _S_array_size; ++__i)
1343 __result += __builtin_popcountll(_M_bits[__i]);
1344 return __result;
1345 }
1346 }
1347
1348 // Returns the bit at offset __i as bool.
1349 constexpr bool
1350 operator[](size_t __i) const noexcept
1351 {
1352 if constexpr (_Np == 1)
1353 return _M_bits[0];
1354 else if constexpr (_S_array_size == 1)
1355 return (_M_bits[0] >> __i) & 1;
1356 else
1357 {
1358 const size_t __j = __i / (sizeof(_Tp) * __CHAR_BIT__);
1359 const size_t __shift = __i % (sizeof(_Tp) * __CHAR_BIT__);
1360 return (_M_bits[__j] >> __shift) & 1;
1361 }
1362 }
1363
1364 template <size_t __i>
1365 constexpr bool
1366 operator[](_SizeConstant<__i>) const noexcept
1367 {
1368 static_assert(__i < _Np);
1369 constexpr size_t __j = __i / (sizeof(_Tp) * __CHAR_BIT__);
1370 constexpr size_t __shift = __i % (sizeof(_Tp) * __CHAR_BIT__);
1371 return static_cast<bool>(_M_bits[__j] & (_Tp(1) << __shift));
1372 }
1373
1374 // Set the bit at offset __i to __x.
1375 constexpr void
1376 set(size_t __i, bool __x) noexcept
1377 {
1378 if constexpr (_Np == 1)
1379 _M_bits[0] = __x;
1380 else if constexpr (_S_array_size == 1)
1381 {
1382 _M_bits[0] &= ~_Tp(_Tp(1) << __i);
1383 _M_bits[0] |= _Tp(_Tp(__x) << __i);
1384 }
1385 else
1386 {
1387 const size_t __j = __i / (sizeof(_Tp) * __CHAR_BIT__);
1388 const size_t __shift = __i % (sizeof(_Tp) * __CHAR_BIT__);
1389 _M_bits[__j] &= ~_Tp(_Tp(1) << __shift);
1390 _M_bits[__j] |= _Tp(_Tp(__x) << __shift);
1391 }
1392 }
1393
1394 template <size_t __i>
1395 constexpr void
1396 set(_SizeConstant<__i>, bool __x) noexcept
1397 {
1398 static_assert(__i < _Np);
1399 if constexpr (_Np == 1)
1400 _M_bits[0] = __x;
1401 else
1402 {
1403 constexpr size_t __j = __i / (sizeof(_Tp) * __CHAR_BIT__);
1404 constexpr size_t __shift = __i % (sizeof(_Tp) * __CHAR_BIT__);
1405 constexpr _Tp __mask = ~_Tp(_Tp(1) << __shift);
1406 _M_bits[__j] &= __mask;
1407 _M_bits[__j] |= _Tp(_Tp(__x) << __shift);
1408 }
1409 }
1410
1411 // Inverts all bits. Sanitized input leads to sanitized output.
1412 constexpr _BitMask
1413 operator~() const noexcept
1414 {
1415 if constexpr (_Np == 1)
1416 return !_M_bits[0];
1417 else
1418 {
1419 _BitMask __result{};
1420 for (int __i = 0; __i < _S_array_size - 1; ++__i)
1421 __result._M_bits[__i] = ~_M_bits[__i];
1422 if constexpr (_Sanitized)
1423 __result._M_bits[_S_array_size - 1]
1424 = _M_bits[_S_array_size - 1] ^ _S_bitmask;
1425 else
1426 __result._M_bits[_S_array_size - 1] = ~_M_bits[_S_array_size - 1];
1427 return __result;
1428 }
1429 }
1430
1431 constexpr _BitMask&
1432 operator^=(const _BitMask& __b) & noexcept
1433 {
1434 __execute_n_times<_S_array_size>(
1435 [&](auto __i) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA { _M_bits[__i] ^= __b._M_bits[__i]; });
1436 return *this;
1437 }
1438
1439 constexpr _BitMask&
1440 operator|=(const _BitMask& __b) & noexcept
1441 {
1442 __execute_n_times<_S_array_size>(
1443 [&](auto __i) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA { _M_bits[__i] |= __b._M_bits[__i]; });
1444 return *this;
1445 }
1446
1447 constexpr _BitMask&
1448 operator&=(const _BitMask& __b) & noexcept
1449 {
1450 __execute_n_times<_S_array_size>(
1451 [&](auto __i) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA { _M_bits[__i] &= __b._M_bits[__i]; });
1452 return *this;
1453 }
1454
1455 friend constexpr _BitMask
1456 operator^(const _BitMask& __a, const _BitMask& __b) noexcept
1457 {
1458 _BitMask __r = __a;
1459 __r ^= __b;
1460 return __r;
1461 }
1462
1463 friend constexpr _BitMask
1464 operator|(const _BitMask& __a, const _BitMask& __b) noexcept
1465 {
1466 _BitMask __r = __a;
1467 __r |= __b;
1468 return __r;
1469 }
1470
1471 friend constexpr _BitMask
1472 operator&(const _BitMask& __a, const _BitMask& __b) noexcept
1473 {
1474 _BitMask __r = __a;
1475 __r &= __b;
1476 return __r;
1477 }
1478
1479 _GLIBCXX_SIMD_INTRINSIC
1480 constexpr bool
1481 _M_is_constprop() const
1482 {
1483 if constexpr (_S_array_size == 0)
1484 return __builtin_constant_p(_M_bits[0]);
1485 else
1486 {
1487 for (int __i = 0; __i < _S_array_size; ++__i)
1488 if (!__builtin_constant_p(_M_bits[__i]))
1489 return false;
1490 return true;
1491 }
1492 }
1493 };
1494
1495// }}}
1496
1497// vvv ---- builtin vector types [[gnu::vector_size(N)]] and operations ---- vvv
1498// __min_vector_size {{{
1499template <typename _Tp = void>
1500 static inline constexpr int __min_vector_size = 2 * sizeof(_Tp);
1501
1502#if _GLIBCXX_SIMD_HAVE_NEON
1503template <>
1504 inline constexpr int __min_vector_size<void> = 8;
1505#else
1506template <>
1507 inline constexpr int __min_vector_size<void> = 16;
1508#endif
1509
1510// }}}
1511// __vector_type {{{
1512template <typename _Tp, size_t _Np, typename = void>
1513 struct __vector_type_n {};
1514
1515// substition failure for 0-element case
1516template <typename _Tp>
1517 struct __vector_type_n<_Tp, 0, void> {};
1518
1519// special case 1-element to be _Tp itself
1520template <typename _Tp>
1521 struct __vector_type_n<_Tp, 1, enable_if_t<__is_vectorizable_v<_Tp>>>
1522 { using type = _Tp; };
1523
1524// else, use GNU-style builtin vector types
1525template <typename _Tp, size_t _Np>
1526 struct __vector_type_n<_Tp, _Np, enable_if_t<__is_vectorizable_v<_Tp> && _Np >= 2>>
1527 {
1528 static constexpr size_t _S_Np2 = std::__bit_ceil(_Np * sizeof(_Tp));
1529
1530 static constexpr size_t _S_Bytes =
1531#ifdef __i386__
1532 // Using [[gnu::vector_size(8)]] would wreak havoc on the FPU because
1533 // those objects are passed via MMX registers and nothing ever calls EMMS.
1534 _S_Np2 == 8 ? 16 :
1535#endif
1536 _S_Np2 < __min_vector_size<_Tp> ? __min_vector_size<_Tp>
1537 : _S_Np2;
1538
1539 using type [[__gnu__::__vector_size__(_S_Bytes)]] = _Tp;
1540 };
1541
1542template <typename _Tp, size_t _Bytes, size_t = _Bytes % sizeof(_Tp)>
1543 struct __vector_type;
1544
1545template <typename _Tp, size_t _Bytes>
1546 struct __vector_type<_Tp, _Bytes, 0>
1547 : __vector_type_n<_Tp, _Bytes / sizeof(_Tp)> {};
1548
1549template <typename _Tp, size_t _Size>
1550 using __vector_type_t = typename __vector_type_n<_Tp, _Size>::type;
1551
1552template <typename _Tp>
1553 using __vector_type2_t = typename __vector_type<_Tp, 2>::type;
1554template <typename _Tp>
1555 using __vector_type4_t = typename __vector_type<_Tp, 4>::type;
1556template <typename _Tp>
1557 using __vector_type8_t = typename __vector_type<_Tp, 8>::type;
1558template <typename _Tp>
1559 using __vector_type16_t = typename __vector_type<_Tp, 16>::type;
1560template <typename _Tp>
1561 using __vector_type32_t = typename __vector_type<_Tp, 32>::type;
1562template <typename _Tp>
1563 using __vector_type64_t = typename __vector_type<_Tp, 64>::type;
1564
1565// }}}
1566// __is_vector_type {{{
1567template <typename _Tp, typename = void_t<>>
1568 struct __is_vector_type : false_type {};
1569
1570template <typename _Tp>
1571 struct __is_vector_type<
1572 _Tp, void_t<typename __vector_type<
1573 remove_reference_t<decltype(declval<_Tp>()[0])>, sizeof(_Tp)>::type>>
1574 : is_same<_Tp, typename __vector_type<
1575 remove_reference_t<decltype(declval<_Tp>()[0])>,
1576 sizeof(_Tp)>::type> {};
1577
1578template <typename _Tp>
1579 inline constexpr bool __is_vector_type_v = __is_vector_type<_Tp>::value;
1580
1581// }}}
1582// __is_intrinsic_type {{{
1583#if _GLIBCXX_SIMD_HAVE_SSE_ABI
1584template <typename _Tp>
1585 using __is_intrinsic_type = __is_vector_type<_Tp>;
1586#else // not SSE (x86)
1587template <typename _Tp, typename = void_t<>>
1588 struct __is_intrinsic_type : false_type {};
1589
1590template <typename _Tp>
1591 struct __is_intrinsic_type<
1592 _Tp, void_t<typename __intrinsic_type<
1593 remove_reference_t<decltype(declval<_Tp>()[0])>, sizeof(_Tp)>::type>>
1594 : is_same<_Tp, typename __intrinsic_type<
1595 remove_reference_t<decltype(declval<_Tp>()[0])>,
1596 sizeof(_Tp)>::type> {};
1597#endif
1598
1599template <typename _Tp>
1600 inline constexpr bool __is_intrinsic_type_v = __is_intrinsic_type<_Tp>::value;
1601
1602// }}}
1603// _VectorTraits{{{
1604template <typename _Tp, typename = void_t<>>
1605 struct _VectorTraitsImpl;
1606
1607template <typename _Tp>
1608 struct _VectorTraitsImpl<_Tp, enable_if_t<__is_vector_type_v<_Tp>
1609 || __is_intrinsic_type_v<_Tp>>>
1610 {
1611 using type = _Tp;
1612 using value_type = remove_reference_t<decltype(declval<_Tp>()[0])>;
1613 static constexpr int _S_full_size = sizeof(_Tp) / sizeof(value_type);
1614 using _Wrapper = _SimdWrapper<value_type, _S_full_size>;
1615 template <typename _Up, int _W = _S_full_size>
1616 static constexpr bool _S_is
1617 = is_same_v<value_type, _Up> && _W == _S_full_size;
1618 };
1619
1620template <typename _Tp, size_t _Np>
1621 struct _VectorTraitsImpl<_SimdWrapper<_Tp, _Np>,
1622 void_t<__vector_type_t<_Tp, _Np>>>
1623 {
1624 using type = __vector_type_t<_Tp, _Np>;
1625 using value_type = _Tp;
1626 static constexpr int _S_full_size = sizeof(type) / sizeof(value_type);
1627 using _Wrapper = _SimdWrapper<_Tp, _Np>;
1628 static constexpr bool _S_is_partial = (_Np == _S_full_size);
1629 static constexpr int _S_partial_width = _Np;
1630 template <typename _Up, int _W = _S_full_size>
1631 static constexpr bool _S_is
1632 = is_same_v<value_type, _Up>&& _W == _S_full_size;
1633 };
1634
1635template <typename _Tp, typename = typename _VectorTraitsImpl<_Tp>::type>
1636 using _VectorTraits = _VectorTraitsImpl<_Tp>;
1637
1638// }}}
1639// __as_vector{{{
1640template <typename _V>
1641 _GLIBCXX_SIMD_INTRINSIC constexpr auto
1642 __as_vector(_V __x)
1643 {
1644 if constexpr (__is_vector_type_v<_V>)
1645 return __x;
1646 else if constexpr (is_simd<_V>::value || is_simd_mask<_V>::value)
1647 {
1648 if constexpr (__is_fixed_size_abi_v<typename _V::abi_type>)
1649 {
1650 static_assert(is_simd<_V>::value);
1651 static_assert(_V::abi_type::template __traits<
1652 typename _V::value_type>::_SimdMember::_S_tuple_size == 1);
1653 return __as_vector(__data(__x).first);
1654 }
1655 else if constexpr (_V::size() > 1)
1656 return __data(__x)._M_data;
1657 else
1658 {
1659 static_assert(is_simd<_V>::value);
1660 using _Tp = typename _V::value_type;
1661#ifdef __i386__
1662 constexpr auto __bytes = sizeof(_Tp) == 8 ? 16 : sizeof(_Tp);
1663 using _RV [[__gnu__::__vector_size__(__bytes)]] = _Tp;
1664#else
1665 using _RV [[__gnu__::__vector_size__(sizeof(_Tp))]] = _Tp;
1666#endif
1667 return _RV{__data(__x)};
1668 }
1669 }
1670 else if constexpr (__is_vectorizable_v<_V>)
1671 return __vector_type_t<_V, 2>{__x};
1672 else
1673 return __x._M_data;
1674 }
1675
1676// }}}
1677// __as_wrapper{{{
1678template <size_t _Np = 0, typename _V>
1679 _GLIBCXX_SIMD_INTRINSIC constexpr auto
1680 __as_wrapper(_V __x)
1681 {
1682 if constexpr (__is_vector_type_v<_V>)
1683 return _SimdWrapper<typename _VectorTraits<_V>::value_type,
1684 (_Np > 0 ? _Np : _VectorTraits<_V>::_S_full_size)>(__x);
1685 else if constexpr (is_simd<_V>::value || is_simd_mask<_V>::value)
1686 {
1687 static_assert(_V::size() == _Np);
1688 return __data(__x);
1689 }
1690 else
1691 {
1692 static_assert(_V::_S_size == _Np);
1693 return __x;
1694 }
1695 }
1696
1697// }}}
1698// __intrin_bitcast{{{
1699template <typename _To, typename _From>
1700 _GLIBCXX_SIMD_INTRINSIC constexpr _To
1701 __intrin_bitcast(_From __v)
1702 {
1703 static_assert((__is_vector_type_v<_From> || __is_intrinsic_type_v<_From>)
1704 && (__is_vector_type_v<_To> || __is_intrinsic_type_v<_To>));
1705 if constexpr (sizeof(_To) == sizeof(_From))
1706 return reinterpret_cast<_To>(__v);
1707 else if constexpr (sizeof(_From) > sizeof(_To))
1708 if constexpr (sizeof(_To) >= 16)
1709 return reinterpret_cast<const __may_alias<_To>&>(__v);
1710 else
1711 {
1712 _To __r;
1713 __builtin_memcpy(&__r, &__v, sizeof(_To));
1714 return __r;
1715 }
1716#if _GLIBCXX_SIMD_X86INTRIN && !defined __clang__
1717 else if constexpr (__have_avx && sizeof(_From) == 16 && sizeof(_To) == 32)
1718 return reinterpret_cast<_To>(__builtin_ia32_ps256_ps(
1719 reinterpret_cast<__vector_type_t<float, 4>>(__v)));
1720 else if constexpr (__have_avx512f && sizeof(_From) == 16
1721 && sizeof(_To) == 64)
1722 return reinterpret_cast<_To>(__builtin_ia32_ps512_ps(
1723 reinterpret_cast<__vector_type_t<float, 4>>(__v)));
1724 else if constexpr (__have_avx512f && sizeof(_From) == 32
1725 && sizeof(_To) == 64)
1726 return reinterpret_cast<_To>(__builtin_ia32_ps512_256ps(
1727 reinterpret_cast<__vector_type_t<float, 8>>(__v)));
1728#endif // _GLIBCXX_SIMD_X86INTRIN
1729 else if constexpr (sizeof(__v) <= 8)
1730 return reinterpret_cast<_To>(
1731 __vector_type_t<__int_for_sizeof_t<_From>, sizeof(_To) / sizeof(_From)>{
1732 reinterpret_cast<__int_for_sizeof_t<_From>>(__v)});
1733 else
1734 {
1735 static_assert(sizeof(_To) > sizeof(_From));
1736 _To __r = {};
1737 __builtin_memcpy(&__r, &__v, sizeof(_From));
1738 return __r;
1739 }
1740 }
1741
1742// }}}
1743// __vector_bitcast{{{
1744template <typename _To, size_t _NN = 0, typename _From,
1745 typename _FromVT = _VectorTraits<_From>,
1746 size_t _Np = _NN == 0 ? sizeof(_From) / sizeof(_To) : _NN>
1747 _GLIBCXX_SIMD_INTRINSIC constexpr __vector_type_t<_To, _Np>
1748 __vector_bitcast(_From __x)
1749 {
1750 using _R = __vector_type_t<_To, _Np>;
1751 return __intrin_bitcast<_R>(__x);
1752 }
1753
1754template <typename _To, size_t _NN = 0, typename _Tp, size_t _Nx,
1755 size_t _Np
1756 = _NN == 0 ? sizeof(_SimdWrapper<_Tp, _Nx>) / sizeof(_To) : _NN>
1757 _GLIBCXX_SIMD_INTRINSIC constexpr __vector_type_t<_To, _Np>
1758 __vector_bitcast(const _SimdWrapper<_Tp, _Nx>& __x)
1759 {
1760 static_assert(_Np > 1);
1761 return __intrin_bitcast<__vector_type_t<_To, _Np>>(__x._M_data);
1762 }
1763
1764// }}}
1765// __convert_x86 declarations {{{
1766#ifdef _GLIBCXX_SIMD_WORKAROUND_PR85048
1767template <typename _To, typename _Tp, typename _TVT = _VectorTraits<_Tp>>
1768 _To __convert_x86(_Tp);
1769
1770template <typename _To, typename _Tp, typename _TVT = _VectorTraits<_Tp>>
1771 _To __convert_x86(_Tp, _Tp);
1772
1773template <typename _To, typename _Tp, typename _TVT = _VectorTraits<_Tp>>
1774 _To __convert_x86(_Tp, _Tp, _Tp, _Tp);
1775
1776template <typename _To, typename _Tp, typename _TVT = _VectorTraits<_Tp>>
1777 _To __convert_x86(_Tp, _Tp, _Tp, _Tp, _Tp, _Tp, _Tp, _Tp);
1778
1779template <typename _To, typename _Tp, typename _TVT = _VectorTraits<_Tp>>
1780 _To __convert_x86(_Tp, _Tp, _Tp, _Tp, _Tp, _Tp, _Tp, _Tp, _Tp, _Tp, _Tp, _Tp,
1781 _Tp, _Tp, _Tp, _Tp);
1782#endif // _GLIBCXX_SIMD_WORKAROUND_PR85048
1783
1784//}}}
1785// __bit_cast {{{
1786template <typename _To, typename _From>
1787 _GLIBCXX_SIMD_INTRINSIC constexpr _To
1788 __bit_cast(const _From __x)
1789 {
1790#if __has_builtin(__builtin_bit_cast)
1791 return __builtin_bit_cast(_To, __x);
1792#else
1793 static_assert(sizeof(_To) == sizeof(_From));
1794 constexpr bool __to_is_vectorizable
1795 = is_arithmetic_v<_To> || is_enum_v<_To>;
1796 constexpr bool __from_is_vectorizable
1797 = is_arithmetic_v<_From> || is_enum_v<_From>;
1798 if constexpr (__is_vector_type_v<_To> && __is_vector_type_v<_From>)
1799 return reinterpret_cast<_To>(__x);
1800 else if constexpr (__is_vector_type_v<_To> && __from_is_vectorizable)
1801 {
1802 using _FV [[__gnu__::__vector_size__(sizeof(_From))]] = _From;
1803 return reinterpret_cast<_To>(_FV{__x});
1804 }
1805 else if constexpr (__to_is_vectorizable && __from_is_vectorizable)
1806 {
1807 using _TV [[__gnu__::__vector_size__(sizeof(_To))]] = _To;
1808 using _FV [[__gnu__::__vector_size__(sizeof(_From))]] = _From;
1809 return reinterpret_cast<_TV>(_FV{__x})[0];
1810 }
1811 else if constexpr (__to_is_vectorizable && __is_vector_type_v<_From>)
1812 {
1813 using _TV [[__gnu__::__vector_size__(sizeof(_To))]] = _To;
1814 return reinterpret_cast<_TV>(__x)[0];
1815 }
1816 else
1817 {
1818 _To __r;
1819 __builtin_memcpy(reinterpret_cast<char*>(&__r),
1820 reinterpret_cast<const char*>(&__x), sizeof(_To));
1821 return __r;
1822 }
1823#endif
1824 }
1825
1826// }}}
1827// __to_intrin {{{
1828template <typename _Tp, typename _TVT = _VectorTraits<_Tp>,
1829 typename _R = __intrinsic_type_t<typename _TVT::value_type, _TVT::_S_full_size>>
1830 _GLIBCXX_SIMD_INTRINSIC constexpr _R
1831 __to_intrin(_Tp __x)
1832 {
1833 static_assert(sizeof(__x) <= sizeof(_R),
1834 "__to_intrin may never drop values off the end");
1835 if constexpr (sizeof(__x) == sizeof(_R))
1836 return reinterpret_cast<_R>(__as_vector(__x));
1837 else
1838 {
1839 using _Up = __int_for_sizeof_t<_Tp>;
1840 return reinterpret_cast<_R>(
1841 __vector_type_t<_Up, sizeof(_R) / sizeof(_Up)>{__bit_cast<_Up>(__x)});
1842 }
1843 }
1844
1845// }}}
1846// __make_vector{{{
1847template <typename _Tp, typename... _Args>
1848 _GLIBCXX_SIMD_INTRINSIC constexpr __vector_type_t<_Tp, sizeof...(_Args)>
1849 __make_vector(const _Args&... __args)
1850 { return __vector_type_t<_Tp, sizeof...(_Args)>{static_cast<_Tp>(__args)...}; }
1851
1852// }}}
1853// __vector_broadcast{{{
1854template <size_t _Np, typename _Tp, size_t... _I>
1855 _GLIBCXX_SIMD_INTRINSIC constexpr __vector_type_t<_Tp, _Np>
1856 __vector_broadcast_impl(_Tp __x, index_sequence<_I...>)
1857 { return __vector_type_t<_Tp, _Np>{((void)_I, __x)...}; }
1858
1859template <size_t _Np, typename _Tp>
1860 _GLIBCXX_SIMD_INTRINSIC constexpr __vector_type_t<_Tp, _Np>
1861 __vector_broadcast(_Tp __x)
1862 { return __vector_broadcast_impl<_Np, _Tp>(__x, make_index_sequence<_Np>()); }
1863
1864// }}}
1865// __generate_vector{{{
1866 template <typename _Tp, size_t _Np, typename _Gp, size_t... _I>
1867 _GLIBCXX_SIMD_INTRINSIC constexpr __vector_type_t<_Tp, _Np>
1868 __generate_vector_impl(_Gp&& __gen, index_sequence<_I...>)
1869 { return __vector_type_t<_Tp, _Np>{ static_cast<_Tp>(__gen(_SizeConstant<_I>()))...}; }
1870
1871template <typename _V, typename _VVT = _VectorTraits<_V>, typename _Gp>
1872 _GLIBCXX_SIMD_INTRINSIC constexpr _V
1873 __generate_vector(_Gp&& __gen)
1874 {
1875 if constexpr (__is_vector_type_v<_V>)
1876 return __generate_vector_impl<typename _VVT::value_type,
1877 _VVT::_S_full_size>(
1878 static_cast<_Gp&&>(__gen), make_index_sequence<_VVT::_S_full_size>());
1879 else
1880 return __generate_vector_impl<typename _VVT::value_type,
1881 _VVT::_S_partial_width>(
1882 static_cast<_Gp&&>(__gen),
1883 make_index_sequence<_VVT::_S_partial_width>());
1884 }
1885
1886template <typename _Tp, size_t _Np, typename _Gp>
1887 _GLIBCXX_SIMD_INTRINSIC constexpr __vector_type_t<_Tp, _Np>
1888 __generate_vector(_Gp&& __gen)
1889 {
1890 return __generate_vector_impl<_Tp, _Np>(static_cast<_Gp&&>(__gen),
1891 make_index_sequence<_Np>());
1892 }
1893
1894// }}}
1895// __xor{{{
1896template <typename _TW>
1897 _GLIBCXX_SIMD_INTRINSIC constexpr _TW
1898 __xor(_TW __a, _TW __b) noexcept
1899 {
1900 if constexpr (__is_vector_type_v<_TW> || __is_simd_wrapper_v<_TW>)
1901 {
1902 using _Tp = typename conditional_t<__is_simd_wrapper_v<_TW>, _TW,
1903 _VectorTraitsImpl<_TW>>::value_type;
1904 if constexpr (is_floating_point_v<_Tp>)
1905 {
1906 using _Ip = make_unsigned_t<__int_for_sizeof_t<_Tp>>;
1907 return __vector_bitcast<_Tp>(__vector_bitcast<_Ip>(__a)
1908 ^ __vector_bitcast<_Ip>(__b));
1909 }
1910 else if constexpr (__is_vector_type_v<_TW>)
1911 return __a ^ __b;
1912 else
1913 return __a._M_data ^ __b._M_data;
1914 }
1915 else
1916 return __a ^ __b;
1917 }
1918
1919// }}}
1920// __or{{{
1921template <typename _TW>
1922 _GLIBCXX_SIMD_INTRINSIC constexpr _TW
1923 __or(_TW __a, _TW __b) noexcept
1924 {
1925 if constexpr (__is_vector_type_v<_TW> || __is_simd_wrapper_v<_TW>)
1926 {
1927 using _Tp = typename conditional_t<__is_simd_wrapper_v<_TW>, _TW,
1928 _VectorTraitsImpl<_TW>>::value_type;
1929 if constexpr (is_floating_point_v<_Tp>)
1930 {
1931 using _Ip = make_unsigned_t<__int_for_sizeof_t<_Tp>>;
1932 return __vector_bitcast<_Tp>(__vector_bitcast<_Ip>(__a)
1933 | __vector_bitcast<_Ip>(__b));
1934 }
1935 else if constexpr (__is_vector_type_v<_TW>)
1936 return __a | __b;
1937 else
1938 return __a._M_data | __b._M_data;
1939 }
1940 else
1941 return __a | __b;
1942 }
1943
1944// }}}
1945// __and{{{
1946template <typename _TW>
1947 _GLIBCXX_SIMD_INTRINSIC constexpr _TW
1948 __and(_TW __a, _TW __b) noexcept
1949 {
1950 if constexpr (__is_vector_type_v<_TW> || __is_simd_wrapper_v<_TW>)
1951 {
1952 using _Tp = typename conditional_t<__is_simd_wrapper_v<_TW>, _TW,
1953 _VectorTraitsImpl<_TW>>::value_type;
1954 if constexpr (is_floating_point_v<_Tp>)
1955 {
1956 using _Ip = make_unsigned_t<__int_for_sizeof_t<_Tp>>;
1957 return __vector_bitcast<_Tp>(__vector_bitcast<_Ip>(__a)
1958 & __vector_bitcast<_Ip>(__b));
1959 }
1960 else if constexpr (__is_vector_type_v<_TW>)
1961 return __a & __b;
1962 else
1963 return __a._M_data & __b._M_data;
1964 }
1965 else
1966 return __a & __b;
1967 }
1968
1969// }}}
1970// __andnot{{{
1971#if _GLIBCXX_SIMD_X86INTRIN && !defined __clang__
1972static constexpr struct
1973{
1974 _GLIBCXX_SIMD_INTRINSIC __v4sf
1975 operator()(__v4sf __a, __v4sf __b) const noexcept
1976 { return __builtin_ia32_andnps(__a, __b); }
1977
1978 _GLIBCXX_SIMD_INTRINSIC __v2df
1979 operator()(__v2df __a, __v2df __b) const noexcept
1980 { return __builtin_ia32_andnpd(__a, __b); }
1981
1982 _GLIBCXX_SIMD_INTRINSIC __v2di
1983 operator()(__v2di __a, __v2di __b) const noexcept
1984 { return __builtin_ia32_pandn128(__a, __b); }
1985
1986 _GLIBCXX_SIMD_INTRINSIC __v8sf
1987 operator()(__v8sf __a, __v8sf __b) const noexcept
1988 { return __builtin_ia32_andnps256(__a, __b); }
1989
1990 _GLIBCXX_SIMD_INTRINSIC __v4df
1991 operator()(__v4df __a, __v4df __b) const noexcept
1992 { return __builtin_ia32_andnpd256(__a, __b); }
1993
1994 _GLIBCXX_SIMD_INTRINSIC __v4di
1995 operator()(__v4di __a, __v4di __b) const noexcept
1996 {
1997 if constexpr (__have_avx2)
1998 return __builtin_ia32_andnotsi256(__a, __b);
1999 else
2000 return reinterpret_cast<__v4di>(
2001 __builtin_ia32_andnpd256(reinterpret_cast<__v4df>(__a),
2002 reinterpret_cast<__v4df>(__b)));
2003 }
2004
2005 _GLIBCXX_SIMD_INTRINSIC __v16sf
2006 operator()(__v16sf __a, __v16sf __b) const noexcept
2007 {
2008 if constexpr (__have_avx512dq)
2009 return _mm512_andnot_ps(__a, __b);
2010 else
2011 return reinterpret_cast<__v16sf>(
2012 _mm512_andnot_si512(reinterpret_cast<__v8di>(__a),
2013 reinterpret_cast<__v8di>(__b)));
2014 }
2015
2016 _GLIBCXX_SIMD_INTRINSIC __v8df
2017 operator()(__v8df __a, __v8df __b) const noexcept
2018 {
2019 if constexpr (__have_avx512dq)
2020 return _mm512_andnot_pd(__a, __b);
2021 else
2022 return reinterpret_cast<__v8df>(
2023 _mm512_andnot_si512(reinterpret_cast<__v8di>(__a),
2024 reinterpret_cast<__v8di>(__b)));
2025 }
2026
2027 _GLIBCXX_SIMD_INTRINSIC __v8di
2028 operator()(__v8di __a, __v8di __b) const noexcept
2029 { return _mm512_andnot_si512(__a, __b); }
2030} _S_x86_andnot;
2031#endif // _GLIBCXX_SIMD_X86INTRIN && !__clang__
2032
2033template <typename _TW>
2034 _GLIBCXX_SIMD_INTRINSIC constexpr _TW
2035 __andnot(_TW __a, _TW __b) noexcept
2036 {
2037 if constexpr (__is_vector_type_v<_TW> || __is_simd_wrapper_v<_TW>)
2038 {
2039 using _TVT = conditional_t<__is_simd_wrapper_v<_TW>, _TW,
2040 _VectorTraitsImpl<_TW>>;
2041 using _Tp = typename _TVT::value_type;
2042#if _GLIBCXX_SIMD_X86INTRIN && !defined __clang__
2043 if constexpr (sizeof(_TW) >= 16)
2044 {
2045 const auto __ai = __to_intrin(__a);
2046 const auto __bi = __to_intrin(__b);
2047 if (!__builtin_is_constant_evaluated()
2048 && !(__builtin_constant_p(__ai) && __builtin_constant_p(__bi)))
2049 {
2050 const auto __r = _S_x86_andnot(__ai, __bi);
2051 if constexpr (is_convertible_v<decltype(__r), _TW>)
2052 return __r;
2053 else
2054 return reinterpret_cast<typename _TVT::type>(__r);
2055 }
2056 }
2057#endif // _GLIBCXX_SIMD_X86INTRIN
2058 using _Ip = make_unsigned_t<__int_for_sizeof_t<_Tp>>;
2059 return __vector_bitcast<_Tp>(~__vector_bitcast<_Ip>(__a)
2060 & __vector_bitcast<_Ip>(__b));
2061 }
2062 else
2063 return ~__a & __b;
2064 }
2065
2066// }}}
2067// __not{{{
2068template <typename _Tp, typename _TVT = _VectorTraits<_Tp>>
2069 _GLIBCXX_SIMD_INTRINSIC constexpr _Tp
2070 __not(_Tp __a) noexcept
2071 {
2072 if constexpr (is_floating_point_v<typename _TVT::value_type>)
2073 return reinterpret_cast<typename _TVT::type>(
2074 ~__vector_bitcast<unsigned>(__a));
2075 else
2076 return ~__a;
2077 }
2078
2079// }}}
2080// __vec_shuffle{{{
2081template <typename _T0, typename _T1, typename _Fun, size_t... _Is>
2082 _GLIBCXX_SIMD_INTRINSIC constexpr
2083 __vector_type_t<remove_reference_t<decltype(declval<_T0>()[0])>, sizeof...(_Is)>
2084 __vec_shuffle(_T0 __x, _T1 __y, index_sequence<_Is...> __seq, _Fun __idx_perm)
2085 {
2086 constexpr int _N0 = sizeof(__x) / sizeof(__x[0]);
2087 constexpr int _N1 = sizeof(__y) / sizeof(__y[0]);
2088 using _Tp = remove_reference_t<decltype(declval<_T0>()[0])>;
2089 using _RV [[maybe_unused]] = __vector_type_t<_Tp, sizeof...(_Is)>;
2090#if __has_builtin(__builtin_shufflevector)
2091#ifdef __clang__
2092 // Clang requires _T0 == _T1
2093 if constexpr (sizeof(__x) > sizeof(__y) and _N1 == 1)
2094 return __vec_shuffle(__x, _T0{__y[0]}, __seq, __idx_perm);
2095 else if constexpr (sizeof(__x) > sizeof(__y))
2096 return __vec_shuffle(__x, __intrin_bitcast<_T0>(__y), __seq, __idx_perm);
2097 else if constexpr (sizeof(__x) < sizeof(__y) and _N0 == 1)
2098 return __vec_shuffle(_T1{__x[0]}, __y, __seq, [=](int __i) {
2099 __i = __idx_perm(__i);
2100 return __i < _N0 ? __i : __i - _N0 + _N1;
2101 });
2102 else if constexpr (sizeof(__x) < sizeof(__y))
2103 return __vec_shuffle(__intrin_bitcast<_T1>(__x), __y, __seq, [=](int __i) {
2104 __i = __idx_perm(__i);
2105 return __i < _N0 ? __i : __i - _N0 + _N1;
2106 });
2107 else
2108#endif
2109 {
2110 const auto __r = __builtin_shufflevector(__x, __y, [=] {
2111 constexpr int __j = __idx_perm(_Is);
2112 static_assert(__j < _N0 + _N1);
2113 return __j;
2114 }()...);
2115#ifdef __i386__
2116 if constexpr (sizeof(__r) == sizeof(_RV))
2117 return __r;
2118 else
2119 return _RV {__r[_Is]...};
2120#else
2121 return __r;
2122#endif
2123 }
2124#else
2125 return _RV {
2126 [=]() -> _Tp {
2127 constexpr int __j = __idx_perm(_Is);
2128 static_assert(__j < _N0 + _N1);
2129 if constexpr (__j < 0)
2130 return 0;
2131 else if constexpr (__j < _N0)
2132 return __x[__j];
2133 else
2134 return __y[__j - _N0];
2135 }()...
2136 };
2137#endif
2138 }
2139
2140template <typename _T0, typename _Fun, typename _Seq>
2141 _GLIBCXX_SIMD_INTRINSIC constexpr auto
2142 __vec_shuffle(_T0 __x, _Seq __seq, _Fun __idx_perm)
2143 { return __vec_shuffle(__x, _T0(), __seq, __idx_perm); }
2144
2145// }}}
2146// __concat{{{
2147template <typename _Tp, typename _TVT = _VectorTraits<_Tp>,
2148 typename _R = __vector_type_t<typename _TVT::value_type, _TVT::_S_full_size * 2>>
2149 constexpr _R
2150 __concat(_Tp a_, _Tp b_)
2151 {
2152#ifdef _GLIBCXX_SIMD_WORKAROUND_XXX_1
2153 using _W
2154 = conditional_t<is_floating_point_v<typename _TVT::value_type>, double,
2155 conditional_t<(sizeof(_Tp) >= 2 * sizeof(long long)),
2156 long long, typename _TVT::value_type>>;
2157 constexpr int input_width = sizeof(_Tp) / sizeof(_W);
2158 const auto __a = __vector_bitcast<_W>(a_);
2159 const auto __b = __vector_bitcast<_W>(b_);
2160 using _Up = __vector_type_t<_W, sizeof(_R) / sizeof(_W)>;
2161#else
2162 constexpr int input_width = _TVT::_S_full_size;
2163 const _Tp& __a = a_;
2164 const _Tp& __b = b_;
2165 using _Up = _R;
2166#endif
2167 if constexpr (input_width == 2)
2168 return reinterpret_cast<_R>(_Up{__a[0], __a[1], __b[0], __b[1]});
2169 else if constexpr (input_width == 4)
2170 return reinterpret_cast<_R>(
2171 _Up{__a[0], __a[1], __a[2], __a[3], __b[0], __b[1], __b[2], __b[3]});
2172 else if constexpr (input_width == 8)
2173 return reinterpret_cast<_R>(
2174 _Up{__a[0], __a[1], __a[2], __a[3], __a[4], __a[5], __a[6], __a[7],
2175 __b[0], __b[1], __b[2], __b[3], __b[4], __b[5], __b[6], __b[7]});
2176 else if constexpr (input_width == 16)
2177 return reinterpret_cast<_R>(
2178 _Up{__a[0], __a[1], __a[2], __a[3], __a[4], __a[5], __a[6],
2179 __a[7], __a[8], __a[9], __a[10], __a[11], __a[12], __a[13],
2180 __a[14], __a[15], __b[0], __b[1], __b[2], __b[3], __b[4],
2181 __b[5], __b[6], __b[7], __b[8], __b[9], __b[10], __b[11],
2182 __b[12], __b[13], __b[14], __b[15]});
2183 else if constexpr (input_width == 32)
2184 return reinterpret_cast<_R>(
2185 _Up{__a[0], __a[1], __a[2], __a[3], __a[4], __a[5], __a[6],
2186 __a[7], __a[8], __a[9], __a[10], __a[11], __a[12], __a[13],
2187 __a[14], __a[15], __a[16], __a[17], __a[18], __a[19], __a[20],
2188 __a[21], __a[22], __a[23], __a[24], __a[25], __a[26], __a[27],
2189 __a[28], __a[29], __a[30], __a[31], __b[0], __b[1], __b[2],
2190 __b[3], __b[4], __b[5], __b[6], __b[7], __b[8], __b[9],
2191 __b[10], __b[11], __b[12], __b[13], __b[14], __b[15], __b[16],
2192 __b[17], __b[18], __b[19], __b[20], __b[21], __b[22], __b[23],
2193 __b[24], __b[25], __b[26], __b[27], __b[28], __b[29], __b[30],
2194 __b[31]});
2195 }
2196
2197// }}}
2198// __zero_extend {{{
2199template <typename _Tp, typename _TVT = _VectorTraits<_Tp>>
2200 struct _ZeroExtendProxy
2201 {
2202 using value_type = typename _TVT::value_type;
2203 static constexpr size_t _Np = _TVT::_S_full_size;
2204 const _Tp __x;
2205
2206 template <typename _To, typename _ToVT = _VectorTraits<_To>,
2207 typename
2208 = enable_if_t<is_same_v<typename _ToVT::value_type, value_type>>>
2209 _GLIBCXX_SIMD_INTRINSIC operator _To() const
2210 {
2211 constexpr size_t _ToN = _ToVT::_S_full_size;
2212 if constexpr (_ToN == _Np)
2213 return __x;
2214 else if constexpr (_ToN == 2 * _Np)
2215 {
2216#ifdef _GLIBCXX_SIMD_WORKAROUND_XXX_3
2217 if constexpr (__have_avx && _TVT::template _S_is<float, 4>)
2218 return __vector_bitcast<value_type>(
2219 _mm256_insertf128_ps(__m256(), __x, 0));
2220 else if constexpr (__have_avx && _TVT::template _S_is<double, 2>)
2221 return __vector_bitcast<value_type>(
2222 _mm256_insertf128_pd(__m256d(), __x, 0));
2223 else if constexpr (__have_avx2 && _Np * sizeof(value_type) == 16)
2224 return __vector_bitcast<value_type>(
2225 _mm256_insertf128_si256(__m256i(), __to_intrin(__x), 0));
2226 else if constexpr (__have_avx512f && _TVT::template _S_is<float, 8>)
2227 {
2228 if constexpr (__have_avx512dq)
2229 return __vector_bitcast<value_type>(
2230 _mm512_insertf32x8(__m512(), __x, 0));
2231 else
2232 return reinterpret_cast<__m512>(
2233 _mm512_insertf64x4(__m512d(),
2234 reinterpret_cast<__m256d>(__x), 0));
2235 }
2236 else if constexpr (__have_avx512f
2237 && _TVT::template _S_is<double, 4>)
2238 return __vector_bitcast<value_type>(
2239 _mm512_insertf64x4(__m512d(), __x, 0));
2240 else if constexpr (__have_avx512f && _Np * sizeof(value_type) == 32)
2241 return __vector_bitcast<value_type>(
2242 _mm512_inserti64x4(__m512i(), __to_intrin(__x), 0));
2243#endif
2244 return __concat(__x, _Tp());
2245 }
2246 else if constexpr (_ToN == 4 * _Np)
2247 {
2248#ifdef _GLIBCXX_SIMD_WORKAROUND_XXX_3
2249 if constexpr (__have_avx512dq && _TVT::template _S_is<double, 2>)
2250 {
2251 return __vector_bitcast<value_type>(
2252 _mm512_insertf64x2(__m512d(), __x, 0));
2253 }
2254 else if constexpr (__have_avx512f
2255 && is_floating_point_v<value_type>)
2256 {
2257 return __vector_bitcast<value_type>(
2258 _mm512_insertf32x4(__m512(), reinterpret_cast<__m128>(__x),
2259 0));
2260 }
2261 else if constexpr (__have_avx512f && _Np * sizeof(value_type) == 16)
2262 {
2263 return __vector_bitcast<value_type>(
2264 _mm512_inserti32x4(__m512i(), __to_intrin(__x), 0));
2265 }
2266#endif
2267 return __concat(__concat(__x, _Tp()),
2268 __vector_type_t<value_type, _Np * 2>());
2269 }
2270 else if constexpr (_ToN == 8 * _Np)
2271 return __concat(operator __vector_type_t<value_type, _Np * 4>(),
2272 __vector_type_t<value_type, _Np * 4>());
2273 else if constexpr (_ToN == 16 * _Np)
2274 return __concat(operator __vector_type_t<value_type, _Np * 8>(),
2275 __vector_type_t<value_type, _Np * 8>());
2276 else
2277 __assert_unreachable<_Tp>();
2278 }
2279 };
2280
2281template <typename _Tp, typename _TVT = _VectorTraits<_Tp>>
2282 _GLIBCXX_SIMD_INTRINSIC _ZeroExtendProxy<_Tp, _TVT>
2283 __zero_extend(_Tp __x)
2284 { return {__x}; }
2285
2286// }}}
2287// __extract<_Np, By>{{{
2288template <int _Offset,
2289 int _SplitBy,
2290 typename _Tp,
2291 typename _TVT = _VectorTraits<_Tp>,
2292 typename _R = __vector_type_t<typename _TVT::value_type, _TVT::_S_full_size / _SplitBy>>
2293 _GLIBCXX_SIMD_INTRINSIC constexpr _R
2294 __extract(_Tp __in)
2295 {
2296 using value_type = typename _TVT::value_type;
2297#if _GLIBCXX_SIMD_X86INTRIN // {{{
2298 if constexpr (sizeof(_Tp) == 64 && _SplitBy == 4 && _Offset > 0)
2299 {
2300 if constexpr (__have_avx512dq && is_same_v<double, value_type>)
2301 return _mm512_extractf64x2_pd(__to_intrin(__in), _Offset);
2302 else if constexpr (is_floating_point_v<value_type>)
2303 return __vector_bitcast<value_type>(
2304 _mm512_extractf32x4_ps(__intrin_bitcast<__m512>(__in), _Offset));
2305 else
2306 return reinterpret_cast<_R>(
2307 _mm512_extracti32x4_epi32(__intrin_bitcast<__m512i>(__in),
2308 _Offset));
2309 }
2310 else
2311#endif // _GLIBCXX_SIMD_X86INTRIN }}}
2312 {
2313#ifdef _GLIBCXX_SIMD_WORKAROUND_XXX_1
2314 using _W = conditional_t<
2315 is_floating_point_v<value_type>, double,
2316 conditional_t<(sizeof(_R) >= 16), long long, value_type>>;
2317 static_assert(sizeof(_R) % sizeof(_W) == 0);
2318 constexpr int __return_width = sizeof(_R) / sizeof(_W);
2319 using _Up = __vector_type_t<_W, __return_width>;
2320 const auto __x = __vector_bitcast<_W>(__in);
2321#else
2322 constexpr int __return_width = _TVT::_S_full_size / _SplitBy;
2323 using _Up = _R;
2324 const __vector_type_t<value_type, _TVT::_S_full_size>& __x
2325 = __in; // only needed for _Tp = _SimdWrapper<value_type, _Np>
2326#endif
2327 constexpr int _O = _Offset * __return_width;
2328 return __call_with_subscripts<__return_width, _O>(
2329 __x, [](auto... __entries) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
2330 return reinterpret_cast<_R>(_Up{__entries...});
2331 });
2332 }
2333 }
2334
2335// }}}
2336// __lo/__hi64[z]{{{
2337template <typename _Tp,
2338 typename _R = __vector_type8_t<typename _VectorTraits<_Tp>::value_type>>
2339 _GLIBCXX_SIMD_INTRINSIC constexpr _R
2340 __lo64(_Tp __x)
2341 {
2342 _R __r{};
2343 __builtin_memcpy(&__r, &__x, 8);
2344 return __r;
2345 }
2346
2347template <typename _Tp,
2348 typename _R = __vector_type8_t<typename _VectorTraits<_Tp>::value_type>>
2349 _GLIBCXX_SIMD_INTRINSIC constexpr _R
2350 __hi64(_Tp __x)
2351 {
2352 static_assert(sizeof(_Tp) == 16, "use __hi64z if you meant it");
2353 _R __r{};
2354 __builtin_memcpy(&__r, reinterpret_cast<const char*>(&__x) + 8, 8);
2355 return __r;
2356 }
2357
2358template <typename _Tp,
2359 typename _R = __vector_type8_t<typename _VectorTraits<_Tp>::value_type>>
2360 _GLIBCXX_SIMD_INTRINSIC constexpr _R
2361 __hi64z([[maybe_unused]] _Tp __x)
2362 {
2363 _R __r{};
2364 if constexpr (sizeof(_Tp) == 16)
2365 __builtin_memcpy(&__r, reinterpret_cast<const char*>(&__x) + 8, 8);
2366 return __r;
2367 }
2368
2369// }}}
2370// __lo/__hi128{{{
2371template <typename _Tp>
2372 _GLIBCXX_SIMD_INTRINSIC constexpr auto
2373 __lo128(_Tp __x)
2374 { return __extract<0, sizeof(_Tp) / 16>(__x); }
2375
2376template <typename _Tp>
2377 _GLIBCXX_SIMD_INTRINSIC constexpr auto
2378 __hi128(_Tp __x)
2379 {
2380 static_assert(sizeof(__x) == 32);
2381 return __extract<1, 2>(__x);
2382 }
2383
2384// }}}
2385// __lo/__hi256{{{
2386template <typename _Tp>
2387 _GLIBCXX_SIMD_INTRINSIC constexpr auto
2388 __lo256(_Tp __x)
2389 {
2390 static_assert(sizeof(__x) == 64);
2391 return __extract<0, 2>(__x);
2392 }
2393
2394template <typename _Tp>
2395 _GLIBCXX_SIMD_INTRINSIC constexpr auto
2396 __hi256(_Tp __x)
2397 {
2398 static_assert(sizeof(__x) == 64);
2399 return __extract<1, 2>(__x);
2400 }
2401
2402// }}}
2403// __auto_bitcast{{{
2404template <typename _Tp>
2405 struct _AutoCast
2406 {
2407 static_assert(__is_vector_type_v<_Tp>);
2408
2409 const _Tp __x;
2410
2411 template <typename _Up, typename _UVT = _VectorTraits<_Up>>
2412 _GLIBCXX_SIMD_INTRINSIC constexpr operator _Up() const
2413 { return __intrin_bitcast<typename _UVT::type>(__x); }
2414 };
2415
2416template <typename _Tp>
2417 _GLIBCXX_SIMD_INTRINSIC constexpr _AutoCast<_Tp>
2418 __auto_bitcast(const _Tp& __x)
2419 { return {__x}; }
2420
2421template <typename _Tp, size_t _Np>
2422 _GLIBCXX_SIMD_INTRINSIC constexpr
2423 _AutoCast<typename _SimdWrapper<_Tp, _Np>::_BuiltinType>
2424 __auto_bitcast(const _SimdWrapper<_Tp, _Np>& __x)
2425 { return {__x._M_data}; }
2426
2427// }}}
2428// ^^^ ---- builtin vector types [[gnu::vector_size(N)]] and operations ---- ^^^
2429
2430#if _GLIBCXX_SIMD_HAVE_SSE_ABI
2431// __bool_storage_member_type{{{
2432#if _GLIBCXX_SIMD_HAVE_AVX512F && _GLIBCXX_SIMD_X86INTRIN
2433template <size_t _Size>
2434 struct __bool_storage_member_type
2435 {
2436 static_assert((_Size & (_Size - 1)) != 0,
2437 "This trait may only be used for non-power-of-2 sizes. "
2438 "Power-of-2 sizes must be specialized.");
2439 using type =
2440 typename __bool_storage_member_type<std::__bit_ceil(_Size)>::type;
2441 };
2442
2443template <>
2444 struct __bool_storage_member_type<1> { using type = bool; };
2445
2446template <>
2447 struct __bool_storage_member_type<2> { using type = __mmask8; };
2448
2449template <>
2450 struct __bool_storage_member_type<4> { using type = __mmask8; };
2451
2452template <>
2453 struct __bool_storage_member_type<8> { using type = __mmask8; };
2454
2455template <>
2456 struct __bool_storage_member_type<16> { using type = __mmask16; };
2457
2458template <>
2459 struct __bool_storage_member_type<32> { using type = __mmask32; };
2460
2461template <>
2462 struct __bool_storage_member_type<64> { using type = __mmask64; };
2463#endif // _GLIBCXX_SIMD_HAVE_AVX512F
2464
2465// }}}
2466// __intrinsic_type (x86){{{
2467// the following excludes bool via __is_vectorizable
2468#if _GLIBCXX_SIMD_HAVE_SSE
2469template <typename _Tp, size_t _Bytes>
2470 struct __intrinsic_type<_Tp, _Bytes, enable_if_t<__is_vectorizable_v<_Tp> && _Bytes <= 64>>
2471 {
2472 static_assert(!is_same_v<_Tp, long double>,
2473 "no __intrinsic_type support for long double on x86");
2474
2475 static constexpr size_t _S_VBytes = _Bytes <= 16 ? 16 : _Bytes <= 32 ? 32 : 64;
2476
2477 using type [[__gnu__::__vector_size__(_S_VBytes)]]
2478 = conditional_t<is_integral_v<_Tp>, long long int, _Tp>;
2479 };
2480#endif // _GLIBCXX_SIMD_HAVE_SSE
2481
2482// }}}
2483#endif // _GLIBCXX_SIMD_HAVE_SSE_ABI
2484// __intrinsic_type (ARM){{{
2485#if _GLIBCXX_SIMD_HAVE_NEON
2486template <>
2487 struct __intrinsic_type<float, 8, void>
2488 { using type = float32x2_t; };
2489
2490template <>
2491 struct __intrinsic_type<float, 16, void>
2492 { using type = float32x4_t; };
2493
2494template <>
2495 struct __intrinsic_type<double, 8, void>
2496 {
2497#if _GLIBCXX_SIMD_HAVE_NEON_A64
2498 using type = float64x1_t;
2499#endif
2500 };
2501
2502template <>
2503 struct __intrinsic_type<double, 16, void>
2504 {
2505#if _GLIBCXX_SIMD_HAVE_NEON_A64
2506 using type = float64x2_t;
2507#endif
2508 };
2509
2510#define _GLIBCXX_SIMD_ARM_INTRIN(_Bits, _Np) \
2511template <> \
2512 struct __intrinsic_type<__int_with_sizeof_t<_Bits / 8>, \
2513 _Np * _Bits / 8, void> \
2514 { using type = int##_Bits##x##_Np##_t; }; \
2515template <> \
2516 struct __intrinsic_type<make_unsigned_t<__int_with_sizeof_t<_Bits / 8>>, \
2517 _Np * _Bits / 8, void> \
2518 { using type = uint##_Bits##x##_Np##_t; }
2519_GLIBCXX_SIMD_ARM_INTRIN(8, 8);
2520_GLIBCXX_SIMD_ARM_INTRIN(8, 16);
2521_GLIBCXX_SIMD_ARM_INTRIN(16, 4);
2522_GLIBCXX_SIMD_ARM_INTRIN(16, 8);
2523_GLIBCXX_SIMD_ARM_INTRIN(32, 2);
2524_GLIBCXX_SIMD_ARM_INTRIN(32, 4);
2525_GLIBCXX_SIMD_ARM_INTRIN(64, 1);
2526_GLIBCXX_SIMD_ARM_INTRIN(64, 2);
2527#undef _GLIBCXX_SIMD_ARM_INTRIN
2528
2529template <typename _Tp, size_t _Bytes>
2530 struct __intrinsic_type<_Tp, _Bytes, enable_if_t<__is_vectorizable_v<_Tp> && _Bytes <= 16>>
2531 {
2532 static constexpr int _SVecBytes = _Bytes <= 8 ? 8 : 16;
2533
2534 using _Ip = __int_for_sizeof_t<_Tp>;
2535
2536 using _Up = conditional_t<
2537 is_floating_point_v<_Tp>, _Tp,
2538 conditional_t<is_unsigned_v<_Tp>, make_unsigned_t<_Ip>, _Ip>>;
2539
2540 static_assert(!is_same_v<_Tp, _Up> || _SVecBytes != _Bytes,
2541 "should use explicit specialization above");
2542
2543 using type = typename __intrinsic_type<_Up, _SVecBytes>::type;
2544 };
2545#endif // _GLIBCXX_SIMD_HAVE_NEON
2546
2547// }}}
2548// __intrinsic_type (PPC){{{
2549#ifdef __ALTIVEC__
2550template <typename _Tp>
2551 struct __intrinsic_type_impl;
2552
2553#define _GLIBCXX_SIMD_PPC_INTRIN(_Tp) \
2554 template <> \
2555 struct __intrinsic_type_impl<_Tp> { using type = __vector _Tp; }
2556_GLIBCXX_SIMD_PPC_INTRIN(float);
2557#ifdef __VSX__
2558_GLIBCXX_SIMD_PPC_INTRIN(double);
2559#endif
2560_GLIBCXX_SIMD_PPC_INTRIN(signed char);
2561_GLIBCXX_SIMD_PPC_INTRIN(unsigned char);
2562_GLIBCXX_SIMD_PPC_INTRIN(signed short);
2563_GLIBCXX_SIMD_PPC_INTRIN(unsigned short);
2564_GLIBCXX_SIMD_PPC_INTRIN(signed int);
2565_GLIBCXX_SIMD_PPC_INTRIN(unsigned int);
2566#if defined __VSX__ || __SIZEOF_LONG__ == 4
2567_GLIBCXX_SIMD_PPC_INTRIN(signed long);
2568_GLIBCXX_SIMD_PPC_INTRIN(unsigned long);
2569#endif
2570#ifdef __VSX__
2571_GLIBCXX_SIMD_PPC_INTRIN(signed long long);
2572_GLIBCXX_SIMD_PPC_INTRIN(unsigned long long);
2573#endif
2574#undef _GLIBCXX_SIMD_PPC_INTRIN
2575
2576template <typename _Tp, size_t _Bytes>
2577 struct __intrinsic_type<_Tp, _Bytes, enable_if_t<__is_vectorizable_v<_Tp> && _Bytes <= 16>>
2578 {
2579 static constexpr bool _S_is_ldouble = is_same_v<_Tp, long double>;
2580
2581 // allow _Tp == long double with -mlong-double-64
2582 static_assert(!(_S_is_ldouble && sizeof(long double) > sizeof(double)),
2583 "no __intrinsic_type support for 128-bit floating point on PowerPC");
2584
2585#ifndef __VSX__
2586 static_assert(!(is_same_v<_Tp, double>
2587 || (_S_is_ldouble && sizeof(long double) == sizeof(double))),
2588 "no __intrinsic_type support for 64-bit floating point on PowerPC w/o VSX");
2589#endif
2590
2591 static constexpr auto __element_type()
2592 {
2593 if constexpr (is_floating_point_v<_Tp>)
2594 {
2595 if constexpr (_S_is_ldouble)
2596 return double {};
2597 else
2598 return _Tp {};
2599 }
2600 else if constexpr (is_signed_v<_Tp>)
2601 {
2602 if constexpr (sizeof(_Tp) == sizeof(_SChar))
2603 return _SChar {};
2604 else if constexpr (sizeof(_Tp) == sizeof(short))
2605 return short {};
2606 else if constexpr (sizeof(_Tp) == sizeof(int))
2607 return int {};
2608 else if constexpr (sizeof(_Tp) == sizeof(_LLong))
2609 return _LLong {};
2610 }
2611 else
2612 {
2613 if constexpr (sizeof(_Tp) == sizeof(_UChar))
2614 return _UChar {};
2615 else if constexpr (sizeof(_Tp) == sizeof(_UShort))
2616 return _UShort {};
2617 else if constexpr (sizeof(_Tp) == sizeof(_UInt))
2618 return _UInt {};
2619 else if constexpr (sizeof(_Tp) == sizeof(_ULLong))
2620 return _ULLong {};
2621 }
2622 }
2623
2624 using type = typename __intrinsic_type_impl<decltype(__element_type())>::type;
2625 };
2626#endif // __ALTIVEC__
2627
2628// }}}
2629// _SimdWrapper<bool>{{{1
2630template <size_t _Width>
2631 struct _SimdWrapper<bool, _Width,
2632 void_t<typename __bool_storage_member_type<_Width>::type>>
2633 {
2634 using _BuiltinType = typename __bool_storage_member_type<_Width>::type;
2635 using value_type = bool;
2636
2637 static constexpr size_t _S_full_size = sizeof(_BuiltinType) * __CHAR_BIT__;
2638
2639 _GLIBCXX_SIMD_INTRINSIC constexpr _SimdWrapper<bool, _S_full_size>
2640 __as_full_vector() const
2641 { return _M_data; }
2642
2643 _GLIBCXX_SIMD_INTRINSIC constexpr
2644 _SimdWrapper() = default;
2645
2646 _GLIBCXX_SIMD_INTRINSIC constexpr
2647 _SimdWrapper(_BuiltinType __k) : _M_data(__k) {};
2648
2649 _GLIBCXX_SIMD_INTRINSIC
2650 operator const _BuiltinType&() const
2651 { return _M_data; }
2652
2653 _GLIBCXX_SIMD_INTRINSIC
2654 operator _BuiltinType&()
2655 { return _M_data; }
2656
2657 _GLIBCXX_SIMD_INTRINSIC _BuiltinType
2658 __intrin() const
2659 { return _M_data; }
2660
2661 _GLIBCXX_SIMD_INTRINSIC constexpr value_type
2662 operator[](size_t __i) const
2663 { return _M_data & (_BuiltinType(1) << __i); }
2664
2665 template <size_t __i>
2666 _GLIBCXX_SIMD_INTRINSIC constexpr value_type
2667 operator[](_SizeConstant<__i>) const
2668 { return _M_data & (_BuiltinType(1) << __i); }
2669
2670 _GLIBCXX_SIMD_INTRINSIC constexpr void
2671 _M_set(size_t __i, value_type __x)
2672 {
2673 if (__x)
2674 _M_data |= (_BuiltinType(1) << __i);
2675 else
2676 _M_data &= ~(_BuiltinType(1) << __i);
2677 }
2678
2679 _GLIBCXX_SIMD_INTRINSIC constexpr bool
2680 _M_is_constprop() const
2681 { return __builtin_constant_p(_M_data); }
2682
2683 _GLIBCXX_SIMD_INTRINSIC constexpr bool
2684 _M_is_constprop_none_of() const
2685 {
2686 if (__builtin_constant_p(_M_data))
2687 {
2688 constexpr int __nbits = sizeof(_BuiltinType) * __CHAR_BIT__;
2689 constexpr _BuiltinType __active_mask
2690 = ~_BuiltinType() >> (__nbits - _Width);
2691 return (_M_data & __active_mask) == 0;
2692 }
2693 return false;
2694 }
2695
2696 _GLIBCXX_SIMD_INTRINSIC constexpr bool
2697 _M_is_constprop_all_of() const
2698 {
2699 if (__builtin_constant_p(_M_data))
2700 {
2701 constexpr int __nbits = sizeof(_BuiltinType) * __CHAR_BIT__;
2702 constexpr _BuiltinType __active_mask
2703 = ~_BuiltinType() >> (__nbits - _Width);
2704 return (_M_data & __active_mask) == __active_mask;
2705 }
2706 return false;
2707 }
2708
2709 _BuiltinType _M_data;
2710 };
2711
2712// _SimdWrapperBase{{{1
2713template <bool _MustZeroInitPadding, typename _BuiltinType>
2714 struct _SimdWrapperBase;
2715
2716template <typename _BuiltinType>
2717 struct _SimdWrapperBase<false, _BuiltinType> // no padding or no SNaNs
2718 {
2719 _GLIBCXX_SIMD_INTRINSIC constexpr
2720 _SimdWrapperBase() = default;
2721
2722 _GLIBCXX_SIMD_INTRINSIC constexpr
2723 _SimdWrapperBase(_BuiltinType __init) : _M_data(__init) {}
2724
2725 _BuiltinType _M_data;
2726 };
2727
2728template <typename _BuiltinType>
2729 struct _SimdWrapperBase<true, _BuiltinType> // with padding that needs to
2730 // never become SNaN
2731 {
2732 _GLIBCXX_SIMD_INTRINSIC constexpr
2733 _SimdWrapperBase() : _M_data() {}
2734
2735 _GLIBCXX_SIMD_INTRINSIC constexpr
2736 _SimdWrapperBase(_BuiltinType __init) : _M_data(__init) {}
2737
2738 _BuiltinType _M_data;
2739 };
2740
2741// }}}
2742// _SimdWrapper{{{
2743struct _DisabledSimdWrapper;
2744
2745template <typename _Tp, size_t _Width>
2746 struct _SimdWrapper<
2747 _Tp, _Width,
2748 void_t<__vector_type_t<_Tp, _Width>, __intrinsic_type_t<_Tp, _Width>>>
2749 : _SimdWrapperBase<__has_iec559_behavior<__signaling_NaN, _Tp>::value
2750 && sizeof(_Tp) * _Width
2751 == sizeof(__vector_type_t<_Tp, _Width>),
2752 __vector_type_t<_Tp, _Width>>
2753 {
2754 static constexpr bool _S_need_default_init
2755 = __has_iec559_behavior<__signaling_NaN, _Tp>::value
2756 and sizeof(_Tp) * _Width == sizeof(__vector_type_t<_Tp, _Width>);
2757
2758 using _BuiltinType = __vector_type_t<_Tp, _Width>;
2759
2760 using _Base = _SimdWrapperBase<_S_need_default_init, _BuiltinType>;
2761
2762 static_assert(__is_vectorizable_v<_Tp>);
2763 static_assert(_Width >= 2); // 1 doesn't make sense, use _Tp directly then
2764
2765 using value_type = _Tp;
2766
2767 static inline constexpr size_t _S_full_size
2768 = sizeof(_BuiltinType) / sizeof(value_type);
2769 static inline constexpr int _S_size = _Width;
2770 static inline constexpr bool _S_is_partial = _S_full_size != _S_size;
2771
2772 using _Base::_M_data;
2773
2774 _GLIBCXX_SIMD_INTRINSIC constexpr _SimdWrapper<_Tp, _S_full_size>
2775 __as_full_vector() const
2776 { return _M_data; }
2777
2778 _GLIBCXX_SIMD_INTRINSIC constexpr
2779 _SimdWrapper(initializer_list<_Tp> __init)
2780 : _Base(__generate_from_n_evaluations<_Width, _BuiltinType>(
2781 [&](auto __i) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
2782 return __init.begin()[__i.value];
2783 })) {}
2784
2785 _GLIBCXX_SIMD_INTRINSIC constexpr
2786 _SimdWrapper() = default;
2787
2788 _GLIBCXX_SIMD_INTRINSIC constexpr
2789 _SimdWrapper(const _SimdWrapper&) = default;
2790
2791 _GLIBCXX_SIMD_INTRINSIC constexpr
2792 _SimdWrapper(_SimdWrapper&&) = default;
2793
2794 _GLIBCXX_SIMD_INTRINSIC constexpr _SimdWrapper&
2795 operator=(const _SimdWrapper&) = default;
2796
2797 _GLIBCXX_SIMD_INTRINSIC constexpr _SimdWrapper&
2798 operator=(_SimdWrapper&&) = default;
2799
2800 // Convert from exactly matching __vector_type_t
2801 using _SimdWrapperBase<_S_need_default_init, _BuiltinType>::_SimdWrapperBase;
2802
2803 // Convert from __intrinsic_type_t if __intrinsic_type_t and __vector_type_t differ, otherwise
2804 // this ctor should not exist. Making the argument type unusable is our next best solution.
2805 _GLIBCXX_SIMD_INTRINSIC constexpr
2806 _SimdWrapper(conditional_t<is_same_v<_BuiltinType, __intrinsic_type_t<_Tp, _Width>>,
2807 _DisabledSimdWrapper, __intrinsic_type_t<_Tp, _Width>> __x)
2808 : _Base(__vector_bitcast<_Tp, _Width>(__x)) {}
2809
2810 // Convert from different __vector_type_t, but only if bit reinterpretation is a correct
2811 // conversion of the value_type
2812 template <typename _V, typename _TVT = _VectorTraits<_V>,
2813 typename = enable_if_t<sizeof(typename _TVT::value_type) == sizeof(_Tp)
2814 and sizeof(_V) == sizeof(_BuiltinType)
2815 and is_integral_v<_Tp>
2816 and is_integral_v<typename _TVT::value_type>>>
2817 _GLIBCXX_SIMD_INTRINSIC constexpr
2818 _SimdWrapper(_V __x)
2819 : _Base(reinterpret_cast<_BuiltinType>(__x)) {}
2820
2821 template <typename... _As,
2822 typename = enable_if_t<((is_same_v<simd_abi::scalar, _As> && ...)
2823 && sizeof...(_As) <= _Width)>>
2824 _GLIBCXX_SIMD_INTRINSIC constexpr
2825 operator _SimdTuple<_Tp, _As...>() const
2826 {
2827 return __generate_from_n_evaluations<sizeof...(_As), _SimdTuple<_Tp, _As...>>(
2828 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA
2829 { return _M_data[int(__i)]; });
2830 }
2831
2832 _GLIBCXX_SIMD_INTRINSIC constexpr
2833 operator const _BuiltinType&() const
2834 { return _M_data; }
2835
2836 _GLIBCXX_SIMD_INTRINSIC constexpr
2837 operator _BuiltinType&()
2838 { return _M_data; }
2839
2840 _GLIBCXX_SIMD_INTRINSIC constexpr _Tp
2841 operator[](size_t __i) const
2842 { return _M_data[__i]; }
2843
2844 template <size_t __i>
2845 _GLIBCXX_SIMD_INTRINSIC constexpr _Tp
2846 operator[](_SizeConstant<__i>) const
2847 { return _M_data[__i]; }
2848
2849 _GLIBCXX_SIMD_INTRINSIC constexpr void
2850 _M_set(size_t __i, _Tp __x)
2851 {
2852 if (__builtin_is_constant_evaluated())
2853 _M_data = __generate_from_n_evaluations<_Width, _BuiltinType>([&](auto __j) {
2854 return __j == __i ? __x : _M_data[__j()];
2855 });
2856 else
2857 _M_data[__i] = __x;
2858 }
2859
2860 _GLIBCXX_SIMD_INTRINSIC
2861 constexpr bool
2862 _M_is_constprop() const
2863 { return __builtin_constant_p(_M_data); }
2864
2865 _GLIBCXX_SIMD_INTRINSIC constexpr bool
2866 _M_is_constprop_none_of() const
2867 {
2868 if (__builtin_constant_p(_M_data))
2869 {
2870 bool __r = true;
2871 if constexpr (is_floating_point_v<_Tp>)
2872 {
2873 using _Ip = __int_for_sizeof_t<_Tp>;
2874 const auto __intdata = __vector_bitcast<_Ip>(_M_data);
2875 __execute_n_times<_Width>(
2876 [&](auto __i) { __r &= __intdata[__i.value] == _Ip(); });
2877 }
2878 else
2879 __execute_n_times<_Width>(
2880 [&](auto __i) { __r &= _M_data[__i.value] == _Tp(); });
2881 if (__builtin_constant_p(__r))
2882 return __r;
2883 }
2884 return false;
2885 }
2886
2887 _GLIBCXX_SIMD_INTRINSIC constexpr bool
2888 _M_is_constprop_all_of() const
2889 {
2890 if (__builtin_constant_p(_M_data))
2891 {
2892 bool __r = true;
2893 if constexpr (is_floating_point_v<_Tp>)
2894 {
2895 using _Ip = __int_for_sizeof_t<_Tp>;
2896 const auto __intdata = __vector_bitcast<_Ip>(_M_data);
2897 __execute_n_times<_Width>(
2898 [&](auto __i) { __r &= __intdata[__i.value] == ~_Ip(); });
2899 }
2900 else
2901 __execute_n_times<_Width>(
2902 [&](auto __i) { __r &= _M_data[__i.value] == ~_Tp(); });
2903 if (__builtin_constant_p(__r))
2904 return __r;
2905 }
2906 return false;
2907 }
2908 };
2909
2910// }}}
2911
2912// __vectorized_sizeof {{{
2913template <typename _Tp>
2914 constexpr size_t
2915 __vectorized_sizeof()
2916 {
2917 if constexpr (!__is_vectorizable_v<_Tp>)
2918 return 0;
2919
2920 if constexpr (sizeof(_Tp) <= 8)
2921 {
2922 // X86:
2923 if constexpr (__have_avx512bw)
2924 return 64;
2925 if constexpr (__have_avx512f && sizeof(_Tp) >= 4)
2926 return 64;
2927 if constexpr (__have_avx2)
2928 return 32;
2929 if constexpr (__have_avx && is_floating_point_v<_Tp>)
2930 return 32;
2931 if constexpr (__have_sse2)
2932 return 16;
2933 if constexpr (__have_sse && is_same_v<_Tp, float>)
2934 return 16;
2935 /* The following is too much trouble because of mixed MMX and x87 code.
2936 * While nothing here explicitly calls MMX instructions of registers,
2937 * they are still emitted but no EMMS cleanup is done.
2938 if constexpr (__have_mmx && sizeof(_Tp) <= 4 && is_integral_v<_Tp>)
2939 return 8;
2940 */
2941
2942 // PowerPC:
2943 if constexpr (__have_power8vec
2944 || (__have_power_vmx && (sizeof(_Tp) < 8))
2945 || (__have_power_vsx && is_floating_point_v<_Tp>) )
2946 return 16;
2947
2948 // ARM:
2949 if constexpr (__have_neon_a64)
2950 return 16;
2951 if constexpr (__have_neon_a32 and (not is_floating_point_v<_Tp>
2952 or is_same_v<_Tp, float>))
2953 return 16;
2954 if constexpr (__have_neon
2955 && sizeof(_Tp) < 8
2956 // Only allow fp if the user allows non-ICE559 fp (e.g.
2957 // via -ffast-math). ARMv7 NEON fp is not conforming to
2958 // IEC559.
2959 && (__support_neon_float || !is_floating_point_v<_Tp>))
2960 return 16;
2961 }
2962
2963 return sizeof(_Tp);
2964 }
2965
2966// }}}
2967namespace simd_abi {
2968// most of simd_abi is defined in simd_detail.h
2969template <typename _Tp>
2970 inline constexpr int max_fixed_size
2971 = ((__have_avx512bw && sizeof(_Tp) == 1)
2972 || (__have_sve && __sve_vectorized_size_bytes/sizeof(_Tp) >= 64)) ? 64 : 32;
2973
2974// compatible {{{
2975#if defined __x86_64__ || defined __aarch64__
2976template <typename _Tp>
2977 using compatible = conditional_t<(sizeof(_Tp) <= 8), _VecBuiltin<16>, scalar>;
2978#elif defined __ARM_NEON
2979// FIXME: not sure, probably needs to be scalar (or dependent on the hard-float
2980// ABI?)
2981template <typename _Tp>
2982 using compatible
2983 = conditional_t<(sizeof(_Tp) < 8
2984 && (__support_neon_float || !is_floating_point_v<_Tp>)),
2985 _VecBuiltin<16>, scalar>;
2986#else
2987template <typename>
2988 using compatible = scalar;
2989#endif
2990
2991// }}}
2992// native {{{
2993template <typename _Tp>
2994 constexpr auto
2995 __determine_native_abi()
2996 {
2997 constexpr size_t __bytes = __vectorized_sizeof<_Tp>();
2998 if constexpr (__bytes == sizeof(_Tp))
2999 return static_cast<scalar*>(nullptr);
3000 else if constexpr (__have_sve)
3001 return static_cast<_SveAbi<__sve_vectorized_size_bytes>*>(nullptr);
3002 else if constexpr (__have_avx512vl || (__have_avx512f && __bytes == 64))
3003 return static_cast<_VecBltnBtmsk<__bytes>*>(nullptr);
3004 else
3005 return static_cast<_VecBuiltin<__bytes>*>(nullptr);
3006 }
3007
3008template <typename _Tp, typename = enable_if_t<__is_vectorizable_v<_Tp>>>
3009 using native = remove_pointer_t<decltype(__determine_native_abi<_Tp>())>;
3010
3011// }}}
3012// __default_abi {{{
3013#if defined _GLIBCXX_SIMD_DEFAULT_ABI
3014template <typename _Tp>
3015 using __default_abi = _GLIBCXX_SIMD_DEFAULT_ABI<_Tp>;
3016#else
3017template <typename _Tp>
3018 using __default_abi = compatible<_Tp>;
3019#endif
3020
3021// }}}
3022} // namespace simd_abi
3023
3024// traits {{{1
3025template <typename _Tp>
3026 struct is_simd_flag_type
3027 : false_type
3028 {};
3029
3030template <>
3031 struct is_simd_flag_type<element_aligned_tag>
3032 : true_type
3033 {};
3034
3035template <>
3036 struct is_simd_flag_type<vector_aligned_tag>
3037 : true_type
3038 {};
3039
3040template <size_t _Np>
3041 struct is_simd_flag_type<overaligned_tag<_Np>>
3042 : __bool_constant<(_Np > 0) and __has_single_bit(_Np)>
3043 {};
3044
3045template <typename _Tp>
3046 inline constexpr bool is_simd_flag_type_v = is_simd_flag_type<_Tp>::value;
3047
3048template <typename _Tp, typename = enable_if_t<is_simd_flag_type_v<_Tp>>>
3049 using _IsSimdFlagType = _Tp;
3050
3051// is_abi_tag {{{2
3052template <typename _Tp, typename = void_t<>>
3053 struct is_abi_tag : false_type {};
3054
3055template <typename _Tp>
3056 struct is_abi_tag<_Tp, void_t<typename _Tp::_IsValidAbiTag>>
3057 : public _Tp::_IsValidAbiTag {};
3058
3059template <typename _Tp>
3060 inline constexpr bool is_abi_tag_v = is_abi_tag<_Tp>::value;
3061
3062// is_simd(_mask) {{{2
3063template <typename _Tp>
3064 struct is_simd : public false_type {};
3065
3066template <typename _Tp>
3067 inline constexpr bool is_simd_v = is_simd<_Tp>::value;
3068
3069template <typename _Tp>
3070 struct is_simd_mask : public false_type {};
3071
3072template <typename _Tp>
3073inline constexpr bool is_simd_mask_v = is_simd_mask<_Tp>::value;
3074
3075// simd_size {{{2
3076template <typename _Tp, typename _Abi, typename = void>
3077 struct __simd_size_impl {};
3078
3079template <typename _Tp, typename _Abi>
3080 struct __simd_size_impl<
3081 _Tp, _Abi,
3082 enable_if_t<conjunction_v<__is_vectorizable<_Tp>, is_abi_tag<_Abi>>>>
3083 : _SizeConstant<_Abi::template _S_size<_Tp>> {};
3084
3085template <typename _Tp, typename _Abi = simd_abi::__default_abi<_Tp>>
3086 struct simd_size : __simd_size_impl<_Tp, _Abi> {};
3087
3088template <typename _Tp, typename _Abi = simd_abi::__default_abi<_Tp>>
3089 inline constexpr size_t simd_size_v = simd_size<_Tp, _Abi>::value;
3090
3091// simd_abi::deduce {{{2
3092template <typename _Tp, size_t _Np, typename = void>
3093 struct __deduce_impl;
3094
3095template <typename _Tp, size_t _Np, typename = void>
3096 struct __no_sve_deduce_impl;
3097
3098namespace simd_abi {
3099/**
3100 * @tparam _Tp The requested `value_type` for the elements.
3101 * @tparam _Np The requested number of elements.
3102 * @tparam _Abis This parameter is ignored, since this implementation cannot
3103 * make any use of it. Either __a good native ABI is matched and used as `type`
3104 * alias, or the `fixed_size<_Np>` ABI is used, which internally is built from
3105 * the best matching native ABIs.
3106 */
3107template <typename _Tp, size_t _Np, typename...>
3108 struct deduce : __deduce_impl<_Tp, _Np> {};
3109
3110template <typename _Tp, size_t _Np, typename... _Abis>
3111 using deduce_t = typename deduce<_Tp, _Np, _Abis...>::type;
3112
3113template <typename _Tp, size_t _Np, typename...>
3114 struct __no_sve_deduce : __no_sve_deduce_impl<_Tp, _Np> {};
3115
3116template <typename _Tp, size_t _Np, typename... _Abis>
3117 using __no_sve_deduce_t = typename __no_sve_deduce<_Tp, _Np, _Abis...>::type;
3118} // namespace simd_abi
3119
3120// }}}2
3121// rebind_simd {{{2
3122template <typename _Tp, typename _V, typename = void>
3123 struct rebind_simd;
3124
3125template <typename _Tp, typename _Up, typename _Abi>
3126 struct rebind_simd<_Tp, simd<_Up, _Abi>,
3127 void_t<std::conditional_t<!__is_sve_abi<_Abi>(),
3128 simd_abi::__no_sve_deduce_t<_Tp, simd_size_v<_Up, _Abi>, _Abi>,
3129 simd_abi::deduce_t<_Tp, simd_size_v<_Up, _Abi>, _Abi>>>>
3130 {
3131 using type = simd<_Tp, std::conditional_t<
3132 !__is_sve_abi<_Abi>(),
3133 simd_abi::__no_sve_deduce_t<_Tp, simd_size_v<_Up, _Abi>, _Abi>,
3134 simd_abi::deduce_t<_Tp, simd_size_v<_Up, _Abi>, _Abi>>>;
3135 };
3136
3137template <typename _Tp, typename _Up, typename _Abi>
3138 struct rebind_simd<_Tp, simd_mask<_Up, _Abi>,
3139 void_t<std::conditional_t<!__is_sve_abi<_Abi>(),
3140 simd_abi::__no_sve_deduce_t<_Tp, simd_size_v<_Up, _Abi>, _Abi>,
3141 simd_abi::deduce_t<_Tp, simd_size_v<_Up, _Abi>, _Abi>>>>
3142 {
3143 using type = simd_mask<_Tp, std::conditional_t<
3144 !__is_sve_abi<_Abi>(),
3145 simd_abi::__no_sve_deduce_t<_Tp, simd_size_v<_Up, _Abi>, _Abi>,
3146 simd_abi::deduce_t<_Tp, simd_size_v<_Up, _Abi>, _Abi>>>;
3147 };
3148
3149template <typename _Tp, typename _V>
3150 using rebind_simd_t = typename rebind_simd<_Tp, _V>::type;
3151
3152// resize_simd {{{2
3153template <int _Np, typename _V, typename = void>
3154 struct resize_simd;
3155
3156template <int _Np, typename _Tp, typename _Abi>
3157 struct resize_simd<_Np, simd<_Tp, _Abi>, void_t<simd_abi::deduce_t<_Tp, _Np, _Abi>>>
3158 { using type = simd<_Tp, simd_abi::deduce_t<_Tp, _Np, _Abi>>; };
3159
3160template <int _Np, typename _Tp, typename _Abi>
3161 struct resize_simd<_Np, simd_mask<_Tp, _Abi>, void_t<simd_abi::deduce_t<_Tp, _Np, _Abi>>>
3162 { using type = simd_mask<_Tp, simd_abi::deduce_t<_Tp, _Np, _Abi>>; };
3163
3164template <int _Np, typename _V>
3165 using resize_simd_t = typename resize_simd<_Np, _V>::type;
3166
3167// }}}2
3168// memory_alignment {{{2
3169template <typename _Tp, typename _Up = typename _Tp::value_type>
3170 struct memory_alignment
3171 : public _SizeConstant<vector_aligned_tag::_S_alignment<_Tp, _Up>> {};
3172
3173template <typename _Tp, typename _Up = typename _Tp::value_type>
3174 inline constexpr size_t memory_alignment_v = memory_alignment<_Tp, _Up>::value;
3175
3176// class template simd [simd] {{{1
3177template <typename _Tp, typename _Abi = simd_abi::__default_abi<_Tp>>
3178 class simd;
3179
3180template <typename _Tp, typename _Abi>
3181 struct is_simd<simd<_Tp, _Abi>> : public true_type {};
3182
3183template <typename _Tp>
3184 using native_simd = simd<_Tp, simd_abi::native<_Tp>>;
3185
3186template <typename _Tp, int _Np>
3187 using fixed_size_simd = simd<_Tp, simd_abi::fixed_size<_Np>>;
3188
3189template <typename _Tp, size_t _Np>
3190 using __deduced_simd = simd<_Tp, simd_abi::deduce_t<_Tp, _Np>>;
3191
3192// class template simd_mask [simd_mask] {{{1
3193template <typename _Tp, typename _Abi = simd_abi::__default_abi<_Tp>>
3194 class simd_mask;
3195
3196template <typename _Tp, typename _Abi>
3197 struct is_simd_mask<simd_mask<_Tp, _Abi>> : public true_type {};
3198
3199template <typename _Tp>
3200 using native_simd_mask = simd_mask<_Tp, simd_abi::native<_Tp>>;
3201
3202template <typename _Tp, int _Np>
3203 using fixed_size_simd_mask = simd_mask<_Tp, simd_abi::fixed_size<_Np>>;
3204
3205template <typename _Tp, size_t _Np>
3206 using __deduced_simd_mask = simd_mask<_Tp, simd_abi::deduce_t<_Tp, _Np>>;
3207
3208// casts [simd.casts] {{{1
3209// static_simd_cast {{{2
3210template <typename _Tp, typename _Up, typename _Ap, bool = is_simd_v<_Tp>, typename = void>
3211 struct __static_simd_cast_return_type;
3212
3213template <typename _Tp, typename _A0, typename _Up, typename _Ap>
3214 struct __static_simd_cast_return_type<simd_mask<_Tp, _A0>, _Up, _Ap, false, void>
3215 : __static_simd_cast_return_type<simd<_Tp, _A0>, _Up, _Ap> {};
3216
3217template <typename _Tp, typename _Up, typename _Ap>
3218 struct __static_simd_cast_return_type<
3219 _Tp, _Up, _Ap, true, enable_if_t<_Tp::size() == simd_size_v<_Up, _Ap>>>
3220 { using type = _Tp; };
3221
3222template <typename _Tp, typename _Ap>
3223 struct __static_simd_cast_return_type<_Tp, _Tp, _Ap, false,
3224#ifdef _GLIBCXX_SIMD_FIX_P2TS_ISSUE66
3225 enable_if_t<__is_vectorizable_v<_Tp>>
3226#else
3227 void
3228#endif
3229 >
3230 { using type = simd<_Tp, _Ap>; };
3231
3232template <typename _Tp, typename = void>
3233 struct __safe_make_signed { using type = _Tp;};
3234
3235template <typename _Tp>
3236 struct __safe_make_signed<_Tp, enable_if_t<is_integral_v<_Tp>>>
3237 {
3238 // the extra make_unsigned_t is because of PR85951
3239 using type = make_signed_t<make_unsigned_t<_Tp>>;
3240 };
3241
3242template <typename _Tp>
3243 using safe_make_signed_t = typename __safe_make_signed<_Tp>::type;
3244
3245template <typename _Tp, typename _Up, typename _Ap>
3246 struct __static_simd_cast_return_type<_Tp, _Up, _Ap, false,
3247#ifdef _GLIBCXX_SIMD_FIX_P2TS_ISSUE66
3248 enable_if_t<__is_vectorizable_v<_Tp>>
3249#else
3250 void
3251#endif
3252 >
3253 {
3254 using type = conditional_t<
3255 (is_integral_v<_Up> && is_integral_v<_Tp> &&
3256#ifndef _GLIBCXX_SIMD_FIX_P2TS_ISSUE65
3257 is_signed_v<_Up> != is_signed_v<_Tp> &&
3258#endif
3259 is_same_v<safe_make_signed_t<_Up>, safe_make_signed_t<_Tp>>),
3260 simd<_Tp, _Ap>, fixed_size_simd<_Tp, simd_size_v<_Up, _Ap>>>;
3261 };
3262
3263template <typename _Tp, typename _Up, typename _Ap,
3264 typename _R
3265 = typename __static_simd_cast_return_type<_Tp, _Up, _Ap>::type>
3266 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR _R
3267 static_simd_cast(const simd<_Up, _Ap>& __x)
3268 {
3269 if constexpr (is_same<_R, simd<_Up, _Ap>>::value)
3270 return __x;
3271 else
3272 {
3273 _SimdConverter<_Up, _Ap, typename _R::value_type, typename _R::abi_type>
3274 __c;
3275 return _R(__private_init, __c(__data(__x)));
3276 }
3277 }
3278
3279namespace __proposed {
3280template <typename _Tp, typename _Up, typename _Ap,
3281 typename _R
3282 = typename __static_simd_cast_return_type<_Tp, _Up, _Ap>::type>
3283 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR typename _R::mask_type
3284 static_simd_cast(const simd_mask<_Up, _Ap>& __x)
3285 {
3286 using _RM = typename _R::mask_type;
3287 return {__private_init, _RM::abi_type::_MaskImpl::template _S_convert<
3288 typename _RM::simd_type::value_type>(__x)};
3289 }
3290
3291template <typename _To, typename _Up, typename _Abi>
3292 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
3293 _To
3294 simd_bit_cast(const simd<_Up, _Abi>& __x)
3295 {
3296 using _Tp = typename _To::value_type;
3297 using _ToMember = typename _SimdTraits<_Tp, typename _To::abi_type>::_SimdMember;
3298 using _From = simd<_Up, _Abi>;
3299 using _FromMember = typename _SimdTraits<_Up, _Abi>::_SimdMember;
3300 // with concepts, the following should be constraints
3301 static_assert(sizeof(_To) == sizeof(_From));
3302 static_assert(is_trivially_copyable_v<_Tp> && is_trivially_copyable_v<_Up>);
3303 static_assert(is_trivially_copyable_v<_ToMember> && is_trivially_copyable_v<_FromMember>);
3304#if __has_builtin(__builtin_bit_cast)
3305 return {__private_init, __builtin_bit_cast(_ToMember, __data(__x))};
3306#else
3307 return {__private_init, __bit_cast<_ToMember>(__data(__x))};
3308#endif
3309 }
3310
3311template <typename _To, typename _Up, typename _Abi>
3312 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
3313 _To
3314 simd_bit_cast(const simd_mask<_Up, _Abi>& __x)
3315 {
3316 using _From = simd_mask<_Up, _Abi>;
3317 static_assert(sizeof(_To) == sizeof(_From));
3318 static_assert(is_trivially_copyable_v<_From>);
3319 // _To can be simd<T, A>, specifically simd<T, fixed_size<N>> in which case _To is not trivially
3320 // copyable.
3321 if constexpr (is_simd_v<_To>)
3322 {
3323 using _Tp = typename _To::value_type;
3324 using _ToMember = typename _SimdTraits<_Tp, typename _To::abi_type>::_SimdMember;
3325 static_assert(is_trivially_copyable_v<_ToMember>);
3326#if __has_builtin(__builtin_bit_cast)
3327 return {__private_init, __builtin_bit_cast(_ToMember, __x)};
3328#else
3329 return {__private_init, __bit_cast<_ToMember>(__x)};
3330#endif
3331 }
3332 else
3333 {
3334 static_assert(is_trivially_copyable_v<_To>);
3335#if __has_builtin(__builtin_bit_cast)
3336 return __builtin_bit_cast(_To, __x);
3337#else
3338 return __bit_cast<_To>(__x);
3339#endif
3340 }
3341 }
3342} // namespace __proposed
3343
3344// simd_cast {{{2
3345template <typename _Tp, typename _Up, typename _Ap,
3346 typename _To = __value_type_or_identity_t<_Tp>>
3347 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR auto
3348 simd_cast(const simd<_ValuePreserving<_Up, _To>, _Ap>& __x)
3349 -> decltype(static_simd_cast<_Tp>(__x))
3350 { return static_simd_cast<_Tp>(__x); }
3351
3352namespace __proposed {
3353template <typename _Tp, typename _Up, typename _Ap,
3354 typename _To = __value_type_or_identity_t<_Tp>>
3355 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR auto
3356 simd_cast(const simd_mask<_ValuePreserving<_Up, _To>, _Ap>& __x)
3357 -> decltype(static_simd_cast<_Tp>(__x))
3358 { return static_simd_cast<_Tp>(__x); }
3359} // namespace __proposed
3360
3361// }}}2
3362// resizing_simd_cast {{{
3363namespace __proposed {
3364/* Proposed spec:
3365
3366template <class T, class U, class Abi>
3367T resizing_simd_cast(const simd<U, Abi>& x)
3368
3369p1 Constraints:
3370 - is_simd_v<T> is true and
3371 - T::value_type is the same type as U
3372
3373p2 Returns:
3374 A simd object with the i^th element initialized to x[i] for all i in the
3375 range of [0, min(T::size(), simd_size_v<U, Abi>)). If T::size() is larger
3376 than simd_size_v<U, Abi>, the remaining elements are value-initialized.
3377
3378template <class T, class U, class Abi>
3379T resizing_simd_cast(const simd_mask<U, Abi>& x)
3380
3381p1 Constraints: is_simd_mask_v<T> is true
3382
3383p2 Returns:
3384 A simd_mask object with the i^th element initialized to x[i] for all i in
3385the range of [0, min(T::size(), simd_size_v<U, Abi>)). If T::size() is larger
3386 than simd_size_v<U, Abi>, the remaining elements are initialized to false.
3387
3388 */
3389
3390template <typename _Tp, typename _Up, typename _Ap>
3391 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR enable_if_t<
3392 conjunction_v<is_simd<_Tp>, is_same<typename _Tp::value_type, _Up>>, _Tp>
3393 resizing_simd_cast(const simd<_Up, _Ap>& __x)
3394 {
3395 if constexpr (is_same_v<typename _Tp::abi_type, _Ap>)
3396 return __x;
3397 else if (__builtin_is_constant_evaluated())
3398 return _Tp([&](auto __i) constexpr {
3399 return __i < simd_size_v<_Up, _Ap> ? __x[__i] : _Up();
3400 });
3401 else if constexpr (simd_size_v<_Up, _Ap> == 1)
3402 {
3403 _Tp __r{};
3404 __r[0] = __x[0];
3405 return __r;
3406 }
3407 else if constexpr (_Tp::size() == 1)
3408 return __x[0];
3409 else if constexpr (sizeof(_Tp) == sizeof(__x)
3410 && !__is_fixed_size_abi_v<_Ap> && !__is_sve_abi<_Ap>())
3411 return {__private_init,
3412 __vector_bitcast<typename _Tp::value_type, _Tp::size()>(
3413 _Ap::_S_masked(__data(__x))._M_data)};
3414 else
3415 {
3416 _Tp __r{};
3417 __builtin_memcpy(&__data(__r), &__data(__x),
3418 sizeof(_Up)
3419 * std::min(_Tp::size(), simd_size_v<_Up, _Ap>));
3420 return __r;
3421 }
3422 }
3423
3424template <typename _Tp, typename _Up, typename _Ap>
3425 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
3426 enable_if_t<is_simd_mask_v<_Tp>, _Tp>
3427 resizing_simd_cast(const simd_mask<_Up, _Ap>& __x)
3428 {
3429 return {__private_init, _Tp::abi_type::_MaskImpl::template _S_convert<
3430 typename _Tp::simd_type::value_type>(__x)};
3431 }
3432} // namespace __proposed
3433
3434// }}}
3435// to_fixed_size {{{2
3436template <typename _Tp, int _Np>
3437 _GLIBCXX_SIMD_INTRINSIC fixed_size_simd<_Tp, _Np>
3438 to_fixed_size(const fixed_size_simd<_Tp, _Np>& __x)
3439 { return __x; }
3440
3441template <typename _Tp, int _Np>
3442 _GLIBCXX_SIMD_INTRINSIC fixed_size_simd_mask<_Tp, _Np>
3443 to_fixed_size(const fixed_size_simd_mask<_Tp, _Np>& __x)
3444 { return __x; }
3445
3446template <typename _Tp, typename _Ap>
3447 _GLIBCXX_SIMD_INTRINSIC fixed_size_simd<_Tp, simd_size_v<_Tp, _Ap>>
3448 to_fixed_size(const simd<_Tp, _Ap>& __x)
3449 {
3450 using _Rp = fixed_size_simd<_Tp, simd_size_v<_Tp, _Ap>>;
3451 return _Rp([&__x](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA { return __x[__i]; });
3452 }
3453
3454template <typename _Tp, typename _Ap>
3455 _GLIBCXX_SIMD_INTRINSIC fixed_size_simd_mask<_Tp, simd_size_v<_Tp, _Ap>>
3456 to_fixed_size(const simd_mask<_Tp, _Ap>& __x)
3457 {
3458 return {__private_init,
3459 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA { return __x[__i]; }};
3460 }
3461
3462// to_native {{{2
3463template <typename _Tp, int _Np>
3464 _GLIBCXX_SIMD_INTRINSIC
3465 enable_if_t<(_Np == native_simd<_Tp>::size()), native_simd<_Tp>>
3466 to_native(const fixed_size_simd<_Tp, _Np>& __x)
3467 {
3468 alignas(memory_alignment_v<native_simd<_Tp>>) _Tp __mem[_Np];
3469 __x.copy_to(__mem, vector_aligned);
3470 return {__mem, vector_aligned};
3471 }
3472
3473template <typename _Tp, int _Np>
3474 _GLIBCXX_SIMD_INTRINSIC
3475 enable_if_t<(_Np == native_simd_mask<_Tp>::size()), native_simd_mask<_Tp>>
3476 to_native(const fixed_size_simd_mask<_Tp, _Np>& __x)
3477 {
3478 return native_simd_mask<_Tp>(
3479 __private_init,
3480 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA { return __x[__i]; });
3481 }
3482
3483// to_compatible {{{2
3484template <typename _Tp, int _Np>
3485 _GLIBCXX_SIMD_INTRINSIC enable_if_t<(_Np == simd<_Tp>::size()), simd<_Tp>>
3486 to_compatible(const simd<_Tp, simd_abi::fixed_size<_Np>>& __x)
3487 {
3488 alignas(memory_alignment_v<simd<_Tp>>) _Tp __mem[_Np];
3489 __x.copy_to(__mem, vector_aligned);
3490 return {__mem, vector_aligned};
3491 }
3492
3493template <typename _Tp, int _Np>
3494 _GLIBCXX_SIMD_INTRINSIC
3495 enable_if_t<(_Np == simd_mask<_Tp>::size()), simd_mask<_Tp>>
3496 to_compatible(const simd_mask<_Tp, simd_abi::fixed_size<_Np>>& __x)
3497 {
3498 return simd_mask<_Tp>(
3499 __private_init,
3500 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA { return __x[__i]; });
3501 }
3502
3503// masked assignment [simd_mask.where] {{{1
3504
3505// where_expression {{{1
3506// const_where_expression<M, T> {{{2
3507template <typename _M, typename _Tp>
3508 class const_where_expression
3509 {
3510 using _V = _Tp;
3511 static_assert(is_same_v<_V, __remove_cvref_t<_Tp>>);
3512
3513 struct _Wrapper { using value_type = _V; };
3514
3515 protected:
3516 using _Impl = typename _V::_Impl;
3517
3518 using value_type =
3519 typename conditional_t<is_arithmetic_v<_V>, _Wrapper, _V>::value_type;
3520
3521 _GLIBCXX_SIMD_INTRINSIC friend const _M&
3522 __get_mask(const const_where_expression& __x)
3523 { return __x._M_k; }
3524
3525 _GLIBCXX_SIMD_INTRINSIC friend const _Tp&
3526 __get_lvalue(const const_where_expression& __x)
3527 { return __x._M_value; }
3528
3529 const _M& _M_k;
3530 _Tp& _M_value;
3531
3532 public:
3533 const_where_expression(const const_where_expression&) = delete;
3534
3535 const_where_expression& operator=(const const_where_expression&) = delete;
3536
3537 _GLIBCXX_SIMD_INTRINSIC constexpr
3538 const_where_expression(const _M& __kk, const _Tp& dd)
3539 : _M_k(__kk), _M_value(const_cast<_Tp&>(dd)) {}
3540
3541 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR _V
3542 operator-() const&&
3543 {
3544 return {__private_init,
3545 _Impl::template _S_masked_unary<negate>(__data(_M_k),
3546 __data(_M_value))};
3547 }
3548
3549 template <typename _Up, typename _Flags>
3550 [[nodiscard]] _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR _V
3551 copy_from(const _LoadStorePtr<_Up, value_type>* __mem, _IsSimdFlagType<_Flags>) const&&
3552 {
3553 return {__private_init,
3554 _Impl::_S_masked_load(__data(_M_value), __data(_M_k),
3555 _Flags::template _S_apply<_V>(__mem))};
3556 }
3557
3558 template <typename _Up, typename _Flags>
3559 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3560 copy_to(_LoadStorePtr<_Up, value_type>* __mem, _IsSimdFlagType<_Flags>) const&&
3561 {
3562 _Impl::_S_masked_store(__data(_M_value),
3563 _Flags::template _S_apply<_V>(__mem),
3564 __data(_M_k));
3565 }
3566 };
3567
3568// const_where_expression<bool, T> {{{2
3569template <typename _Tp>
3570 class const_where_expression<bool, _Tp>
3571 {
3572 using _M = bool;
3573 using _V = _Tp;
3574
3575 static_assert(is_same_v<_V, __remove_cvref_t<_Tp>>);
3576
3577 struct _Wrapper { using value_type = _V; };
3578
3579 protected:
3580 using value_type
3581 = typename conditional_t<is_arithmetic_v<_V>, _Wrapper, _V>::value_type;
3582
3583 _GLIBCXX_SIMD_INTRINSIC friend const _M&
3584 __get_mask(const const_where_expression& __x)
3585 { return __x._M_k; }
3586
3587 _GLIBCXX_SIMD_INTRINSIC friend const _Tp&
3588 __get_lvalue(const const_where_expression& __x)
3589 { return __x._M_value; }
3590
3591 const bool _M_k;
3592 _Tp& _M_value;
3593
3594 public:
3595 const_where_expression(const const_where_expression&) = delete;
3596 const_where_expression& operator=(const const_where_expression&) = delete;
3597
3598 _GLIBCXX_SIMD_INTRINSIC constexpr
3599 const_where_expression(const bool __kk, const _Tp& dd)
3600 : _M_k(__kk), _M_value(const_cast<_Tp&>(dd)) {}
3601
3602 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR _V
3603 operator-() const&&
3604 { return _M_k ? -_M_value : _M_value; }
3605
3606 template <typename _Up, typename _Flags>
3607 [[nodiscard]] _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR _V
3608 copy_from(const _LoadStorePtr<_Up, value_type>* __mem, _IsSimdFlagType<_Flags>) const&&
3609 { return _M_k ? static_cast<_V>(__mem[0]) : _M_value; }
3610
3611 template <typename _Up, typename _Flags>
3612 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3613 copy_to(_LoadStorePtr<_Up, value_type>* __mem, _IsSimdFlagType<_Flags>) const&&
3614 {
3615 if (_M_k)
3616 __mem[0] = _M_value;
3617 }
3618 };
3619
3620// where_expression<M, T> {{{2
3621template <typename _M, typename _Tp>
3622 class where_expression : public const_where_expression<_M, _Tp>
3623 {
3624 using _Impl = typename const_where_expression<_M, _Tp>::_Impl;
3625
3626 static_assert(!is_const<_Tp>::value,
3627 "where_expression may only be instantiated with __a non-const "
3628 "_Tp parameter");
3629
3630 using typename const_where_expression<_M, _Tp>::value_type;
3631 using const_where_expression<_M, _Tp>::_M_k;
3632 using const_where_expression<_M, _Tp>::_M_value;
3633
3634 static_assert(
3635 is_same<typename _M::abi_type, typename _Tp::abi_type>::value, "");
3636 static_assert(_M::size() == _Tp::size(), "");
3637
3638 _GLIBCXX_SIMD_INTRINSIC friend constexpr _Tp&
3639 __get_lvalue(where_expression& __x)
3640 { return __x._M_value; }
3641
3642 public:
3643 where_expression(const where_expression&) = delete;
3644 where_expression& operator=(const where_expression&) = delete;
3645
3646 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
3647 where_expression(const _M& __kk, _Tp& dd)
3648 : const_where_expression<_M, _Tp>(__kk, dd) {}
3649
3650 template <typename _Up>
3651 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3652 operator=(_Up&& __x) &&
3653 {
3654 _Impl::_S_masked_assign(__data(_M_k), __data(_M_value),
3655 __to_value_type_or_member_type<_Tp>(
3656 static_cast<_Up&&>(__x)));
3657 }
3658
3659#define _GLIBCXX_SIMD_OP_(__op, __name) \
3660 template <typename _Up> \
3661 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void \
3662 operator __op##=(_Up&& __x)&& \
3663 { \
3664 _Impl::template _S_masked_cassign( \
3665 __data(_M_k), __data(_M_value), \
3666 __to_value_type_or_member_type<_Tp>(static_cast<_Up&&>(__x)), \
3667 [](auto __impl, auto __lhs, auto __rhs) \
3668 constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA \
3669 { return __impl.__name(__lhs, __rhs); }); \
3670 } \
3671 static_assert(true)
3672 _GLIBCXX_SIMD_OP_(+, _S_plus);
3673 _GLIBCXX_SIMD_OP_(-, _S_minus);
3674 _GLIBCXX_SIMD_OP_(*, _S_multiplies);
3675 _GLIBCXX_SIMD_OP_(/, _S_divides);
3676 _GLIBCXX_SIMD_OP_(%, _S_modulus);
3677 _GLIBCXX_SIMD_OP_(&, _S_bit_and);
3678 _GLIBCXX_SIMD_OP_(|, _S_bit_or);
3679 _GLIBCXX_SIMD_OP_(^, _S_bit_xor);
3680 _GLIBCXX_SIMD_OP_(<<, _S_shift_left);
3681 _GLIBCXX_SIMD_OP_(>>, _S_shift_right);
3682#undef _GLIBCXX_SIMD_OP_
3683
3684 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3685 operator++() &&
3686 {
3687 __data(_M_value)
3688 = _Impl::template _S_masked_unary<__increment>(__data(_M_k), __data(_M_value));
3689 }
3690
3691 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3692 operator++(int) &&
3693 {
3694 __data(_M_value)
3695 = _Impl::template _S_masked_unary<__increment>(__data(_M_k), __data(_M_value));
3696 }
3697
3698 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3699 operator--() &&
3700 {
3701 __data(_M_value)
3702 = _Impl::template _S_masked_unary<__decrement>(__data(_M_k), __data(_M_value));
3703 }
3704
3705 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3706 operator--(int) &&
3707 {
3708 __data(_M_value)
3709 = _Impl::template _S_masked_unary<__decrement>(__data(_M_k), __data(_M_value));
3710 }
3711
3712 // intentionally hides const_where_expression::copy_from
3713 template <typename _Up, typename _Flags>
3714 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3715 copy_from(const _LoadStorePtr<_Up, value_type>* __mem, _IsSimdFlagType<_Flags>) &&
3716 {
3717 __data(_M_value) = _Impl::_S_masked_load(__data(_M_value), __data(_M_k),
3718 _Flags::template _S_apply<_Tp>(__mem));
3719 }
3720 };
3721
3722// where_expression<bool, T> {{{2
3723template <typename _Tp>
3724 class where_expression<bool, _Tp>
3725 : public const_where_expression<bool, _Tp>
3726 {
3727 using _M = bool;
3728 using typename const_where_expression<_M, _Tp>::value_type;
3729 using const_where_expression<_M, _Tp>::_M_k;
3730 using const_where_expression<_M, _Tp>::_M_value;
3731
3732 public:
3733 where_expression(const where_expression&) = delete;
3734 where_expression& operator=(const where_expression&) = delete;
3735
3736 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
3737 where_expression(const _M& __kk, _Tp& dd)
3738 : const_where_expression<_M, _Tp>(__kk, dd) {}
3739
3740#define _GLIBCXX_SIMD_OP_(__op) \
3741 template <typename _Up> \
3742 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void \
3743 operator __op(_Up&& __x)&& \
3744 { if (_M_k) _M_value __op static_cast<_Up&&>(__x); }
3745
3746 _GLIBCXX_SIMD_OP_(=)
3747 _GLIBCXX_SIMD_OP_(+=)
3748 _GLIBCXX_SIMD_OP_(-=)
3749 _GLIBCXX_SIMD_OP_(*=)
3750 _GLIBCXX_SIMD_OP_(/=)
3751 _GLIBCXX_SIMD_OP_(%=)
3752 _GLIBCXX_SIMD_OP_(&=)
3753 _GLIBCXX_SIMD_OP_(|=)
3754 _GLIBCXX_SIMD_OP_(^=)
3755 _GLIBCXX_SIMD_OP_(<<=)
3756 _GLIBCXX_SIMD_OP_(>>=)
3757 #undef _GLIBCXX_SIMD_OP_
3758
3759 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3760 operator++() &&
3761 { if (_M_k) ++_M_value; }
3762
3763 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3764 operator++(int) &&
3765 { if (_M_k) ++_M_value; }
3766
3767 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3768 operator--() &&
3769 { if (_M_k) --_M_value; }
3770
3771 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3772 operator--(int) &&
3773 { if (_M_k) --_M_value; }
3774
3775 // intentionally hides const_where_expression::copy_from
3776 template <typename _Up, typename _Flags>
3777 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3778 copy_from(const _LoadStorePtr<_Up, value_type>* __mem, _IsSimdFlagType<_Flags>) &&
3779 { if (_M_k) _M_value = __mem[0]; }
3780 };
3781
3782// where {{{1
3783template <typename _Tp, typename _Ap>
3784 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
3785 where_expression<simd_mask<_Tp, _Ap>, simd<_Tp, _Ap>>
3786 where(const typename simd<_Tp, _Ap>::mask_type& __k, simd<_Tp, _Ap>& __value)
3787 { return {__k, __value}; }
3788
3789template <typename _Tp, typename _Ap>
3790 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
3791 const_where_expression<simd_mask<_Tp, _Ap>, simd<_Tp, _Ap>>
3792 where(const typename simd<_Tp, _Ap>::mask_type& __k, const simd<_Tp, _Ap>& __value)
3793 { return {__k, __value}; }
3794
3795template <typename _Tp, typename _Ap>
3796 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
3797 where_expression<simd_mask<_Tp, _Ap>, simd_mask<_Tp, _Ap>>
3798 where(const remove_const_t<simd_mask<_Tp, _Ap>>& __k, simd_mask<_Tp, _Ap>& __value)
3799 { return {__k, __value}; }
3800
3801template <typename _Tp, typename _Ap>
3802 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
3803 const_where_expression<simd_mask<_Tp, _Ap>, simd_mask<_Tp, _Ap>>
3804 where(const remove_const_t<simd_mask<_Tp, _Ap>>& __k, const simd_mask<_Tp, _Ap>& __value)
3805 { return {__k, __value}; }
3806
3807template <typename _Tp>
3808 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR where_expression<bool, _Tp>
3809 where(_ExactBool __k, _Tp& __value)
3810 { return {__k, __value}; }
3811
3812template <typename _Tp>
3813 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR const_where_expression<bool, _Tp>
3814 where(_ExactBool __k, const _Tp& __value)
3815 { return {__k, __value}; }
3816
3817template <typename _Tp, typename _Ap>
3818 _GLIBCXX_SIMD_CONSTEXPR void
3819 where(bool __k, simd<_Tp, _Ap>& __value) = delete;
3820
3821template <typename _Tp, typename _Ap>
3822 _GLIBCXX_SIMD_CONSTEXPR void
3823 where(bool __k, const simd<_Tp, _Ap>& __value) = delete;
3824
3825// proposed mask iterations {{{1
3826namespace __proposed {
3827template <size_t _Np>
3828 class where_range
3829 {
3830 const bitset<_Np> __bits;
3831
3832 public:
3833 where_range(bitset<_Np> __b) : __bits(__b) {}
3834
3835 class iterator
3836 {
3837 size_t __mask;
3838 size_t __bit;
3839
3840 _GLIBCXX_SIMD_INTRINSIC void
3841 __next_bit()
3842 { __bit = __builtin_ctzl(__mask); }
3843
3844 _GLIBCXX_SIMD_INTRINSIC void
3845 __reset_lsb()
3846 {
3847 // 01100100 - 1 = 01100011
3848 __mask &= (__mask - 1);
3849 // __asm__("btr %1,%0" : "+r"(__mask) : "r"(__bit));
3850 }
3851
3852 public:
3853 iterator(decltype(__mask) __m) : __mask(__m) { __next_bit(); }
3854 iterator(const iterator&) = default;
3855 iterator(iterator&&) = default;
3856
3857 _GLIBCXX_SIMD_ALWAYS_INLINE size_t
3858 operator->() const
3859 { return __bit; }
3860
3861 _GLIBCXX_SIMD_ALWAYS_INLINE size_t
3862 operator*() const
3863 { return __bit; }
3864
3865 _GLIBCXX_SIMD_ALWAYS_INLINE iterator&
3866 operator++()
3867 {
3868 __reset_lsb();
3869 __next_bit();
3870 return *this;
3871 }
3872
3873 _GLIBCXX_SIMD_ALWAYS_INLINE iterator
3874 operator++(int)
3875 {
3876 iterator __tmp = *this;
3877 __reset_lsb();
3878 __next_bit();
3879 return __tmp;
3880 }
3881
3882 _GLIBCXX_SIMD_ALWAYS_INLINE bool
3883 operator==(const iterator& __rhs) const
3884 { return __mask == __rhs.__mask; }
3885
3886 _GLIBCXX_SIMD_ALWAYS_INLINE bool
3887 operator!=(const iterator& __rhs) const
3888 { return __mask != __rhs.__mask; }
3889 };
3890
3891 iterator
3892 begin() const
3893 { return __bits.to_ullong(); }
3894
3895 iterator
3896 end() const
3897 { return 0; }
3898 };
3899
3900template <typename _Tp, typename _Ap>
3901 where_range<simd_size_v<_Tp, _Ap>>
3902 where(const simd_mask<_Tp, _Ap>& __k)
3903 { return __k.__to_bitset(); }
3904
3905} // namespace __proposed
3906
3907// }}}1
3908// reductions [simd.reductions] {{{1
3909template <typename _Tp, typename _Abi, typename _BinaryOperation = plus<>>
3910 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR _Tp
3911 reduce(const simd<_Tp, _Abi>& __v, _BinaryOperation __binary_op = _BinaryOperation())
3912 { return _Abi::_SimdImpl::_S_reduce(__v, __binary_op); }
3913
3914template <typename _M, typename _V, typename _BinaryOperation = plus<>>
3915 _GLIBCXX_SIMD_INTRINSIC typename _V::value_type
3916 reduce(const const_where_expression<_M, _V>& __x,
3917 typename _V::value_type __identity_element, _BinaryOperation __binary_op)
3918 {
3919 if (__builtin_expect(none_of(__get_mask(__x)), false))
3920 return __identity_element;
3921
3922 _V __tmp = __identity_element;
3923 _V::_Impl::_S_masked_assign(__data(__get_mask(__x)), __data(__tmp),
3924 __data(__get_lvalue(__x)));
3925 return reduce(__tmp, __binary_op);
3926 }
3927
3928template <typename _M, typename _V>
3929 _GLIBCXX_SIMD_INTRINSIC typename _V::value_type
3930 reduce(const const_where_expression<_M, _V>& __x, plus<> __binary_op = {})
3931 { return reduce(__x, 0, __binary_op); }
3932
3933template <typename _M, typename _V>
3934 _GLIBCXX_SIMD_INTRINSIC typename _V::value_type
3935 reduce(const const_where_expression<_M, _V>& __x, multiplies<> __binary_op)
3936 { return reduce(__x, 1, __binary_op); }
3937
3938template <typename _M, typename _V>
3939 _GLIBCXX_SIMD_INTRINSIC typename _V::value_type
3940 reduce(const const_where_expression<_M, _V>& __x, bit_and<> __binary_op)
3941 { return reduce(__x, ~typename _V::value_type(), __binary_op); }
3942
3943template <typename _M, typename _V>
3944 _GLIBCXX_SIMD_INTRINSIC typename _V::value_type
3945 reduce(const const_where_expression<_M, _V>& __x, bit_or<> __binary_op)
3946 { return reduce(__x, 0, __binary_op); }
3947
3948template <typename _M, typename _V>
3949 _GLIBCXX_SIMD_INTRINSIC typename _V::value_type
3950 reduce(const const_where_expression<_M, _V>& __x, bit_xor<> __binary_op)
3951 { return reduce(__x, 0, __binary_op); }
3952
3953template <typename _Tp, typename _Abi>
3954 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR _Tp
3955 hmin(const simd<_Tp, _Abi>& __v) noexcept
3956 { return _Abi::_SimdImpl::_S_reduce(__v, __detail::_Minimum()); }
3957
3958template <typename _Tp, typename _Abi>
3959 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR _Tp
3960 hmax(const simd<_Tp, _Abi>& __v) noexcept
3961 { return _Abi::_SimdImpl::_S_reduce(__v, __detail::_Maximum()); }
3962
3963template <typename _M, typename _V>
3964 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
3965 typename _V::value_type
3966 hmin(const const_where_expression<_M, _V>& __x) noexcept
3967 {
3968 using _Tp = typename _V::value_type;
3969 constexpr _Tp __id_elem =
3970#ifdef __FINITE_MATH_ONLY__
3971 __finite_max_v<_Tp>;
3972#else
3973 __value_or<__infinity, _Tp>(__finite_max_v<_Tp>);
3974#endif
3975 _V __tmp = __id_elem;
3976 _V::_Impl::_S_masked_assign(__data(__get_mask(__x)), __data(__tmp),
3977 __data(__get_lvalue(__x)));
3978 return _V::abi_type::_SimdImpl::_S_reduce(__tmp, __detail::_Minimum());
3979 }
3980
3981template <typename _M, typename _V>
3982 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
3983 typename _V::value_type
3984 hmax(const const_where_expression<_M, _V>& __x) noexcept
3985 {
3986 using _Tp = typename _V::value_type;
3987 constexpr _Tp __id_elem =
3988#ifdef __FINITE_MATH_ONLY__
3989 __finite_min_v<_Tp>;
3990#else
3991 [] {
3992 if constexpr (__value_exists_v<__infinity, _Tp>)
3993 return -__infinity_v<_Tp>;
3994 else
3995 return __finite_min_v<_Tp>;
3996 }();
3997#endif
3998 _V __tmp = __id_elem;
3999 _V::_Impl::_S_masked_assign(__data(__get_mask(__x)), __data(__tmp),
4000 __data(__get_lvalue(__x)));
4001 return _V::abi_type::_SimdImpl::_S_reduce(__tmp, __detail::_Maximum());
4002 }
4003
4004// }}}1
4005// algorithms [simd.alg] {{{
4006template <typename _Tp, typename _Ap>
4007 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR simd<_Tp, _Ap>
4008 min(const simd<_Tp, _Ap>& __a, const simd<_Tp, _Ap>& __b)
4009 { return {__private_init, _Ap::_SimdImpl::_S_min(__data(__a), __data(__b))}; }
4010
4011template <typename _Tp, typename _Ap>
4012 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR simd<_Tp, _Ap>
4013 max(const simd<_Tp, _Ap>& __a, const simd<_Tp, _Ap>& __b)
4014 { return {__private_init, _Ap::_SimdImpl::_S_max(__data(__a), __data(__b))}; }
4015
4016template <typename _Tp, typename _Ap>
4017 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
4018 pair<simd<_Tp, _Ap>, simd<_Tp, _Ap>>
4019 minmax(const simd<_Tp, _Ap>& __a, const simd<_Tp, _Ap>& __b)
4020 {
4021 const auto pair_of_members
4022 = _Ap::_SimdImpl::_S_minmax(__data(__a), __data(__b));
4023 return {simd<_Tp, _Ap>(__private_init, pair_of_members.first),
4024 simd<_Tp, _Ap>(__private_init, pair_of_members.second)};
4025 }
4026
4027template <typename _Tp, typename _Ap>
4028 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR simd<_Tp, _Ap>
4029 clamp(const simd<_Tp, _Ap>& __v, const simd<_Tp, _Ap>& __lo, const simd<_Tp, _Ap>& __hi)
4030 {
4031 using _Impl = typename _Ap::_SimdImpl;
4032 return {__private_init,
4033 _Impl::_S_min(__data(__hi),
4034 _Impl::_S_max(__data(__lo), __data(__v)))};
4035 }
4036
4037// }}}
4038
4039template <size_t... _Sizes, typename _Tp, typename _Ap,
4040 typename = enable_if_t<((_Sizes + ...) == simd<_Tp, _Ap>::size())>>
4041 inline tuple<simd<_Tp, simd_abi::deduce_t<_Tp, _Sizes>>...>
4042 split(const simd<_Tp, _Ap>&);
4043
4044// __extract_part {{{
4045template <int _Index, int _Total, int _Combine = 1, typename _Tp, size_t _Np>
4046 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_CONST constexpr
4047 conditional_t<_Np == _Total and _Combine == 1, _Tp, _SimdWrapper<_Tp, _Np / _Total * _Combine>>
4048 __extract_part(const _SimdWrapper<_Tp, _Np> __x);
4049
4050template <int _Index, int _Parts, int _Combine = 1, typename _Tp, typename _A0, typename... _As>
4051 _GLIBCXX_SIMD_INTRINSIC constexpr auto
4052 __extract_part(const _SimdTuple<_Tp, _A0, _As...>& __x);
4053
4054// }}}
4055// _SizeList {{{
4056template <size_t _V0, size_t... _Values>
4057 struct _SizeList
4058 {
4059 template <size_t _I>
4060 static constexpr size_t
4061 _S_at(_SizeConstant<_I> = {})
4062 {
4063 if constexpr (_I == 0)
4064 return _V0;
4065 else
4066 return _SizeList<_Values...>::template _S_at<_I - 1>();
4067 }
4068
4069 template <size_t _I>
4070 static constexpr auto
4071 _S_before(_SizeConstant<_I> = {})
4072 {
4073 if constexpr (_I == 0)
4074 return _SizeConstant<0>();
4075 else
4076 return _SizeConstant<
4077 _V0 + _SizeList<_Values...>::template _S_before<_I - 1>()>();
4078 }
4079
4080 template <size_t _Np>
4081 static constexpr auto
4082 _S_pop_front(_SizeConstant<_Np> = {})
4083 {
4084 if constexpr (_Np == 0)
4085 return _SizeList();
4086 else
4087 return _SizeList<_Values...>::template _S_pop_front<_Np - 1>();
4088 }
4089 };
4090
4091// }}}
4092// __extract_center {{{
4093template <typename _Tp, size_t _Np>
4094 _GLIBCXX_SIMD_INTRINSIC _SimdWrapper<_Tp, _Np / 2>
4095 __extract_center(_SimdWrapper<_Tp, _Np> __x)
4096 {
4097 static_assert(_Np >= 4);
4098 static_assert(_Np % 4 == 0); // x0 - x1 - x2 - x3 -> return {x1, x2}
4099#if _GLIBCXX_SIMD_X86INTRIN // {{{
4100 if constexpr (__have_avx512f && sizeof(_Tp) * _Np == 64)
4101 {
4102 const auto __intrin = __to_intrin(__x);
4103 if constexpr (is_integral_v<_Tp>)
4104 return __vector_bitcast<_Tp>(_mm512_castsi512_si256(
4105 _mm512_shuffle_i32x4(__intrin, __intrin,
4106 1 + 2 * 0x4 + 2 * 0x10 + 3 * 0x40)));
4107 else if constexpr (sizeof(_Tp) == 4)
4108 return __vector_bitcast<_Tp>(_mm512_castps512_ps256(
4109 _mm512_shuffle_f32x4(__intrin, __intrin,
4110 1 + 2 * 0x4 + 2 * 0x10 + 3 * 0x40)));
4111 else if constexpr (sizeof(_Tp) == 8)
4112 return __vector_bitcast<_Tp>(_mm512_castpd512_pd256(
4113 _mm512_shuffle_f64x2(__intrin, __intrin,
4114 1 + 2 * 0x4 + 2 * 0x10 + 3 * 0x40)));
4115 else
4116 __assert_unreachable<_Tp>();
4117 }
4118 else if constexpr (sizeof(_Tp) * _Np == 32 && is_floating_point_v<_Tp>)
4119 return __vector_bitcast<_Tp>(
4120 _mm_shuffle_pd(__lo128(__vector_bitcast<double>(__x)),
4121 __hi128(__vector_bitcast<double>(__x)), 1));
4122 else if constexpr (sizeof(__x) == 32 && sizeof(_Tp) * _Np <= 32)
4123 return __vector_bitcast<_Tp>(
4124 _mm_alignr_epi8(__hi128(__vector_bitcast<_LLong>(__x)),
4125 __lo128(__vector_bitcast<_LLong>(__x)),
4126 sizeof(_Tp) * _Np / 4));
4127 else
4128#endif // _GLIBCXX_SIMD_X86INTRIN }}}
4129 {
4130 __vector_type_t<_Tp, _Np / 2> __r;
4131 __builtin_memcpy(&__r,
4132 reinterpret_cast<const char*>(&__x)
4133 + sizeof(_Tp) * _Np / 4,
4134 sizeof(_Tp) * _Np / 2);
4135 return __r;
4136 }
4137 }
4138
4139template <typename _Tp, typename _A0, typename... _As>
4140 _GLIBCXX_SIMD_INTRINSIC
4141 _SimdWrapper<_Tp, _SimdTuple<_Tp, _A0, _As...>::_S_size() / 2>
4142 __extract_center(const _SimdTuple<_Tp, _A0, _As...>& __x)
4143 {
4144 if constexpr (sizeof...(_As) == 0)
4145 return __extract_center(__x.first);
4146 else
4147 return __extract_part<1, 4, 2>(__x);
4148 }
4149
4150// }}}
4151// __split_wrapper {{{
4152template <size_t... _Sizes, typename _Tp, typename... _As>
4153 auto
4154 __split_wrapper(_SizeList<_Sizes...>, const _SimdTuple<_Tp, _As...>& __x)
4155 {
4156 return split<_Sizes...>(
4157 fixed_size_simd<_Tp, _SimdTuple<_Tp, _As...>::_S_size()>(__private_init,
4158 __x));
4159 }
4160
4161// }}}
4162
4163// split<simd>(simd) {{{
4164template <typename _V, typename _Ap,
4165 size_t _Parts = simd_size_v<typename _V::value_type, _Ap> / _V::size()>
4166 enable_if_t<simd_size_v<typename _V::value_type, _Ap> == _Parts * _V::size()
4167 && is_simd_v<_V>, array<_V, _Parts>>
4168 split(const simd<typename _V::value_type, _Ap>& __x)
4169 {
4170 using _Tp = typename _V::value_type;
4171
4172 auto __gen_fallback = [&]() constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4173 return __generate_from_n_evaluations<_Parts, array<_V, _Parts>>(
4174 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4175 return _V([&](auto __j) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA
4176 { return __x[__i * _V::size() + __j]; });
4177 });
4178 };
4179
4180 if constexpr (_Parts == 1)
4181 {
4182 return {simd_cast<_V>(__x)};
4183 }
4184 else if (__x._M_is_constprop())
4185 {
4186 return __gen_fallback();
4187 }
4188#if _GLIBCXX_SIMD_HAVE_SVE
4189 else if constexpr(__is_sve_abi<_Ap>)
4190 {
4191 return __gen_fallback();
4192 }
4193#endif
4194 else if constexpr (
4195 __is_fixed_size_abi_v<_Ap>
4196 && (is_same_v<typename _V::abi_type, simd_abi::scalar>
4197 || (__is_fixed_size_abi_v<typename _V::abi_type>
4198 && sizeof(_V) == sizeof(_Tp) * _V::size() // _V doesn't have padding
4199 )))
4200 {
4201 // fixed_size -> fixed_size (w/o padding) or scalar
4202#ifdef _GLIBCXX_SIMD_USE_ALIASING_LOADS
4203 const __may_alias<_Tp>* const __element_ptr
4204 = reinterpret_cast<const __may_alias<_Tp>*>(&__data(__x));
4205 return __generate_from_n_evaluations<_Parts, array<_V, _Parts>>(
4206 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA
4207 { return _V(__element_ptr + __i * _V::size(), vector_aligned); });
4208#else
4209 const auto& __xx = __data(__x);
4210 return __generate_from_n_evaluations<_Parts, array<_V, _Parts>>(
4211 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4212 [[maybe_unused]] constexpr size_t __offset
4213 = decltype(__i)::value * _V::size();
4214 return _V([&](auto __j) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4215 constexpr _SizeConstant<__j + __offset> __k;
4216 return __xx[__k];
4217 });
4218 });
4219#endif
4220 }
4221 else if constexpr (is_same_v<typename _V::abi_type, simd_abi::scalar>)
4222 {
4223 // normally memcpy should work here as well
4224 return __generate_from_n_evaluations<_Parts, array<_V, _Parts>>(
4225 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA { return __x[__i]; });
4226 }
4227 else
4228 {
4229 return __generate_from_n_evaluations<_Parts, array<_V, _Parts>>(
4230 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4231 if constexpr (__is_fixed_size_abi_v<typename _V::abi_type>)
4232 return _V([&](auto __j) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4233 return __x[__i * _V::size() + __j];
4234 });
4235 else
4236 return _V(__private_init,
4237 __extract_part<decltype(__i)::value, _Parts>(__data(__x)));
4238 });
4239 }
4240 }
4241
4242// }}}
4243// split<simd_mask>(simd_mask) {{{
4244template <typename _V, typename _Ap,
4245 size_t _Parts = simd_size_v<typename _V::simd_type::value_type, _Ap> / _V::size()>
4246 enable_if_t<is_simd_mask_v<_V> && simd_size_v<typename
4247 _V::simd_type::value_type, _Ap> == _Parts * _V::size(), array<_V, _Parts>>
4248 split(const simd_mask<typename _V::simd_type::value_type, _Ap>& __x)
4249 {
4250 if constexpr (is_same_v<_Ap, typename _V::abi_type>)
4251 return {__x};
4252 else if constexpr (_Parts == 1)
4253 return {__proposed::static_simd_cast<_V>(__x)};
4254 else if constexpr (_Parts == 2 && __is_sse_abi<typename _V::abi_type>()
4255 && __is_avx_abi<_Ap>())
4256 return {_V(__private_init, __lo128(__data(__x))),
4257 _V(__private_init, __hi128(__data(__x)))};
4258 else if constexpr (_V::size() <= __CHAR_BIT__ * sizeof(_ULLong))
4259 {
4260 const bitset __bits = __x.__to_bitset();
4261 return __generate_from_n_evaluations<_Parts, array<_V, _Parts>>(
4262 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4263 constexpr size_t __offset = __i * _V::size();
4264 return _V(__bitset_init, (__bits >> __offset).to_ullong());
4265 });
4266 }
4267 else
4268 {
4269 return __generate_from_n_evaluations<_Parts, array<_V, _Parts>>(
4270 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4271 constexpr size_t __offset = __i * _V::size();
4272 return _V(__private_init,
4273 [&](auto __j) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4274 return __x[__j + __offset];
4275 });
4276 });
4277 }
4278 }
4279
4280// }}}
4281// split<_Sizes...>(simd) {{{
4282template <size_t... _Sizes, typename _Tp, typename _Ap, typename>
4283 _GLIBCXX_SIMD_ALWAYS_INLINE
4284 tuple<simd<_Tp, simd_abi::deduce_t<_Tp, _Sizes>>...>
4285 split(const simd<_Tp, _Ap>& __x)
4286 {
4287 using _SL = _SizeList<_Sizes...>;
4288 using _Tuple = tuple<__deduced_simd<_Tp, _Sizes>...>;
4289 constexpr size_t _Np = simd_size_v<_Tp, _Ap>;
4290 constexpr size_t _N0 = _SL::template _S_at<0>();
4291 using _V = __deduced_simd<_Tp, _N0>;
4292
4293 auto __gen_fallback = [&]() constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA
4294 {
4295 return __generate_from_n_evaluations<sizeof...(_Sizes), _Tuple>(
4296 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4297 using _Vi = __deduced_simd<_Tp, _SL::_S_at(__i)>;
4298 constexpr size_t __offset = _SL::_S_before(__i);
4299 return _Vi([&](auto __j) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4300 return __x[__offset + __j];
4301 });
4302 });
4303 };
4304
4305 if (__x._M_is_constprop())
4306 __gen_fallback();
4307#if _GLIBCXX_SIMD_HAVE_SVE
4308 else if constexpr (__have_sve)
4309 __gen_fallback();
4310#endif
4311 else if constexpr (_Np == _N0)
4312 {
4313 static_assert(sizeof...(_Sizes) == 1);
4314 return {simd_cast<_V>(__x)};
4315 }
4316 else if constexpr // split from fixed_size, such that __x::first.size == _N0
4317 (__is_fixed_size_abi_v<
4318 _Ap> && __fixed_size_storage_t<_Tp, _Np>::_S_first_size == _N0)
4319 {
4320 static_assert(
4321 !__is_fixed_size_abi_v<typename _V::abi_type>,
4322 "How can <_Tp, _Np> be __a single _SimdTuple entry but __a "
4323 "fixed_size_simd "
4324 "when deduced?");
4325 // extract first and recurse (__split_wrapper is needed to deduce a new
4326 // _Sizes pack)
4327 return tuple_cat(make_tuple(_V(__private_init, __data(__x).first)),
4328 __split_wrapper(_SL::template _S_pop_front<1>(),
4329 __data(__x).second));
4330 }
4331 else if constexpr ((!__is_fixed_size_abi_v<simd_abi::deduce_t<_Tp, _Sizes>> && ...))
4332 {
4333 constexpr array<size_t, sizeof...(_Sizes)> __size = {_Sizes...};
4334 return __generate_from_n_evaluations<sizeof...(_Sizes), _Tuple>(
4335 [&](auto __i) constexpr {
4336 constexpr size_t __offset = [&]() {
4337 size_t __r = 0;
4338 for (unsigned __j = 0; __j < __i; ++__j)
4339 __r += __size[__j];
4340 return __r;
4341 }();
4342 return __deduced_simd<_Tp, __size[__i]>(
4343 __private_init,
4344 __extract_part<__offset, _Np, __size[__i]>(__data(__x)));
4345 });
4346 }
4347#ifdef _GLIBCXX_SIMD_USE_ALIASING_LOADS
4348 const __may_alias<_Tp>* const __element_ptr
4349 = reinterpret_cast<const __may_alias<_Tp>*>(&__x);
4350 return __generate_from_n_evaluations<sizeof...(_Sizes), _Tuple>(
4351 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4352 using _Vi = __deduced_simd<_Tp, _SL::_S_at(__i)>;
4353 constexpr size_t __offset = _SL::_S_before(__i);
4354 constexpr size_t __base_align = alignof(simd<_Tp, _Ap>);
4355 constexpr size_t __a
4356 = __base_align - ((__offset * sizeof(_Tp)) % __base_align);
4357 constexpr size_t __b = ((__a - 1) & __a) ^ __a;
4358 constexpr size_t __alignment = __b == 0 ? __a : __b;
4359 return _Vi(__element_ptr + __offset, overaligned<__alignment>);
4360 });
4361#else
4362 return __generate_from_n_evaluations<sizeof...(_Sizes), _Tuple>(
4363 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4364 using _Vi = __deduced_simd<_Tp, _SL::_S_at(__i)>;
4365 const auto& __xx = __data(__x);
4366 using _Offset = decltype(_SL::_S_before(__i));
4367 return _Vi([&](auto __j) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4368 constexpr _SizeConstant<_Offset::value + __j> __k;
4369 return __xx[__k];
4370 });
4371 });
4372#endif
4373 }
4374
4375// }}}
4376
4377// __subscript_in_pack {{{
4378template <size_t _I, typename _Tp, typename _Ap, typename... _As>
4379 _GLIBCXX_SIMD_INTRINSIC constexpr _Tp
4380 __subscript_in_pack(const simd<_Tp, _Ap>& __x, const simd<_Tp, _As>&... __xs)
4381 {
4382 if constexpr (_I < simd_size_v<_Tp, _Ap>)
4383 return __x[_I];
4384 else
4385 return __subscript_in_pack<_I - simd_size_v<_Tp, _Ap>>(__xs...);
4386 }
4387
4388// }}}
4389// __store_pack_of_simd {{{
4390template <typename _Tp, typename _A0, typename... _As>
4391 _GLIBCXX_SIMD_INTRINSIC void
4392 __store_pack_of_simd(char* __mem, const simd<_Tp, _A0>& __x0, const simd<_Tp, _As>&... __xs)
4393 {
4394 constexpr size_t __n_bytes = sizeof(_Tp) * simd_size_v<_Tp, _A0>;
4395 __builtin_memcpy(__mem, &__data(__x0), __n_bytes);
4396 if constexpr (sizeof...(__xs) > 0)
4397 __store_pack_of_simd(__mem + __n_bytes, __xs...);
4398 }
4399
4400// }}}
4401// concat(simd...) {{{
4402template <typename _Tp, typename... _As, typename = __detail::__odr_helper>
4403 inline _GLIBCXX_SIMD_CONSTEXPR
4404 simd<_Tp, simd_abi::deduce_t<_Tp, (simd_size_v<_Tp, _As> + ...)>>
4405 concat(const simd<_Tp, _As>&... __xs)
4406 {
4407 constexpr int _Np = (simd_size_v<_Tp, _As> + ...);
4408 using _Abi = simd_abi::deduce_t<_Tp, _Np>;
4409 using _Rp = simd<_Tp, _Abi>;
4410 using _RW = typename _SimdTraits<_Tp, _Abi>::_SimdMember;
4411 if constexpr (sizeof...(__xs) == 1)
4412 return simd_cast<_Rp>(__xs...);
4413 else if ((... && __xs._M_is_constprop()))
4414 return _Rp([&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA
4415 { return __subscript_in_pack<__i>(__xs...); });
4416 else if constexpr (__is_simd_wrapper_v<_RW> and sizeof...(__xs) == 2)
4417 {
4418 return {__private_init,
4419 __vec_shuffle(__as_vector(__xs)..., std::make_index_sequence<_RW::_S_full_size>(),
4420 [](int __i) {
4421 constexpr int __sizes[2] = {int(simd_size_v<_Tp, _As>)...};
4422 constexpr int __vsizes[2]
4423 = {int(sizeof(__as_vector(__xs)) / sizeof(_Tp))...};
4424 constexpr int __padding0 = __vsizes[0] - __sizes[0];
4425 return __i >= _Np ? -1 : __i < __sizes[0] ? __i : __i + __padding0;
4426 })};
4427 }
4428 else if constexpr (__is_simd_wrapper_v<_RW> and sizeof...(__xs) == 3)
4429 return [](const auto& __x0, const auto& __x1, const auto& __x2)
4430 _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4431 return concat(concat(__x0, __x1), __x2);
4432 }(__xs...);
4433 else if constexpr (__is_simd_wrapper_v<_RW> and sizeof...(__xs) > 3)
4434 return [](const auto& __x0, const auto& __x1, const auto&... __rest)
4435 _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4436 return concat(concat(__x0, __x1), concat(__rest...));
4437 }(__xs...);
4438 else
4439 {
4440 _Rp __r{};
4441 __store_pack_of_simd(reinterpret_cast<char*>(&__data(__r)), __xs...);
4442 return __r;
4443 }
4444 }
4445
4446// }}}
4447// concat(array<simd>) {{{
4448template <typename _Tp, typename _Abi, size_t _Np>
4449 _GLIBCXX_SIMD_ALWAYS_INLINE
4450 _GLIBCXX_SIMD_CONSTEXPR __deduced_simd<_Tp, simd_size_v<_Tp, _Abi> * _Np>
4451 concat(const array<simd<_Tp, _Abi>, _Np>& __x)
4452 {
4453 return __call_with_subscripts<_Np>(
4454 __x, [](const auto&... __xs) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4455 return concat(__xs...);
4456 });
4457 }
4458
4459// }}}
4460
4461/// @cond undocumented
4462// _SmartReference {{{
4463template <typename _Up, typename _Accessor = _Up,
4464 typename _ValueType = typename _Up::value_type>
4465 class _SmartReference
4466 {
4467 friend _Accessor;
4468 int _M_index;
4469 _Up& _M_obj;
4470
4471 _GLIBCXX_SIMD_INTRINSIC constexpr _ValueType
4472 _M_read() const noexcept
4473 {
4474 if constexpr (is_arithmetic_v<_Up>)
4475 return _M_obj;
4476 else
4477 return _M_obj[_M_index];
4478 }
4479
4480 template <typename _Tp>
4481 _GLIBCXX_SIMD_INTRINSIC constexpr void
4482 _M_write(_Tp&& __x) const
4483 { _Accessor::_S_set(_M_obj, _M_index, static_cast<_Tp&&>(__x)); }
4484
4485 public:
4486 _GLIBCXX_SIMD_INTRINSIC constexpr
4487 _SmartReference(_Up& __o, int __i) noexcept
4488 : _M_index(__i), _M_obj(__o) {}
4489
4490 using value_type = _ValueType;
4491
4492 _GLIBCXX_SIMD_INTRINSIC
4493 _SmartReference(const _SmartReference&) = delete;
4494
4495 _GLIBCXX_SIMD_INTRINSIC constexpr
4496 operator value_type() const noexcept
4497 { return _M_read(); }
4498
4499 template <typename _Tp, typename = _ValuePreservingOrInt<__remove_cvref_t<_Tp>, value_type>>
4500 _GLIBCXX_SIMD_INTRINSIC constexpr _SmartReference
4501 operator=(_Tp&& __x) &&
4502 {
4503 _M_write(static_cast<_Tp&&>(__x));
4504 return {_M_obj, _M_index};
4505 }
4506
4507#define _GLIBCXX_SIMD_OP_(__op) \
4508 template <typename _Tp, \
4509 typename _TT = decltype(declval<value_type>() __op declval<_Tp>()), \
4510 typename = _ValuePreservingOrInt<__remove_cvref_t<_Tp>, _TT>, \
4511 typename = _ValuePreservingOrInt<_TT, value_type>> \
4512 _GLIBCXX_SIMD_INTRINSIC constexpr _SmartReference \
4513 operator __op##=(_Tp&& __x) && \
4514 { \
4515 const value_type& __lhs = _M_read(); \
4516 _M_write(__lhs __op __x); \
4517 return {_M_obj, _M_index}; \
4518 }
4519 _GLIBCXX_SIMD_ALL_ARITHMETICS(_GLIBCXX_SIMD_OP_);
4520 _GLIBCXX_SIMD_ALL_SHIFTS(_GLIBCXX_SIMD_OP_);
4521 _GLIBCXX_SIMD_ALL_BINARY(_GLIBCXX_SIMD_OP_);
4522#undef _GLIBCXX_SIMD_OP_
4523
4524 template <typename _Tp = void,
4525 typename = decltype(++declval<conditional_t<true, value_type, _Tp>&>())>
4526 _GLIBCXX_SIMD_INTRINSIC constexpr _SmartReference
4527 operator++() &&
4528 {
4529 value_type __x = _M_read();
4530 _M_write(++__x);
4531 return {_M_obj, _M_index};
4532 }
4533
4534 template <typename _Tp = void,
4535 typename = decltype(declval<conditional_t<true, value_type, _Tp>&>()++)>
4536 _GLIBCXX_SIMD_INTRINSIC constexpr value_type
4537 operator++(int) &&
4538 {
4539 const value_type __r = _M_read();
4540 value_type __x = __r;
4541 _M_write(++__x);
4542 return __r;
4543 }
4544
4545 template <typename _Tp = void,
4546 typename = decltype(--declval<conditional_t<true, value_type, _Tp>&>())>
4547 _GLIBCXX_SIMD_INTRINSIC constexpr _SmartReference
4548 operator--() &&
4549 {
4550 value_type __x = _M_read();
4551 _M_write(--__x);
4552 return {_M_obj, _M_index};
4553 }
4554
4555 template <typename _Tp = void,
4556 typename = decltype(declval<conditional_t<true, value_type, _Tp>&>()--)>
4557 _GLIBCXX_SIMD_INTRINSIC constexpr value_type
4558 operator--(int) &&
4559 {
4560 const value_type __r = _M_read();
4561 value_type __x = __r;
4562 _M_write(--__x);
4563 return __r;
4564 }
4565
4566 _GLIBCXX_SIMD_INTRINSIC friend void
4567 swap(_SmartReference&& __a, _SmartReference&& __b) noexcept(
4568 conjunction<
4569 is_nothrow_constructible<value_type, _SmartReference&&>,
4570 is_nothrow_assignable<_SmartReference&&, value_type&&>>::value)
4571 {
4572 value_type __tmp = static_cast<_SmartReference&&>(__a);
4573 static_cast<_SmartReference&&>(__a) = static_cast<value_type>(__b);
4574 static_cast<_SmartReference&&>(__b) = std::move(__tmp);
4575 }
4576
4577 _GLIBCXX_SIMD_INTRINSIC friend void
4578 swap(value_type& __a, _SmartReference&& __b) noexcept(
4579 conjunction<
4580 is_nothrow_constructible<value_type, value_type&&>,
4581 is_nothrow_assignable<value_type&, value_type&&>,
4582 is_nothrow_assignable<_SmartReference&&, value_type&&>>::value)
4583 {
4584 value_type __tmp(std::move(__a));
4585 __a = static_cast<value_type>(__b);
4586 static_cast<_SmartReference&&>(__b) = std::move(__tmp);
4587 }
4588
4589 _GLIBCXX_SIMD_INTRINSIC friend void
4590 swap(_SmartReference&& __a, value_type& __b) noexcept(
4591 conjunction<
4592 is_nothrow_constructible<value_type, _SmartReference&&>,
4593 is_nothrow_assignable<value_type&, value_type&&>,
4594 is_nothrow_assignable<_SmartReference&&, value_type&&>>::value)
4595 {
4596 value_type __tmp(__a);
4597 static_cast<_SmartReference&&>(__a) = std::move(__b);
4598 __b = std::move(__tmp);
4599 }
4600 };
4601
4602// }}}
4603// __scalar_abi_wrapper {{{
4604template <int _Bytes>
4605 struct __scalar_abi_wrapper
4606 {
4607 template <typename _Tp> static constexpr size_t _S_full_size = 1;
4608 template <typename _Tp> static constexpr size_t _S_size = 1;
4609 template <typename _Tp> static constexpr size_t _S_is_partial = false;
4610
4611 template <typename _Tp, typename _Abi = simd_abi::scalar>
4612 static constexpr bool _S_is_valid_v
4613 = _Abi::template _IsValid<_Tp>::value && sizeof(_Tp) == _Bytes;
4614 };
4615
4616// }}}
4617// __decay_abi metafunction {{{
4618template <typename _Tp>
4619 struct __decay_abi { using type = _Tp; };
4620
4621template <int _Bytes>
4622 struct __decay_abi<__scalar_abi_wrapper<_Bytes>>
4623 { using type = simd_abi::scalar; };
4624
4625// }}}
4626// __find_next_valid_abi metafunction {{{1
4627// Given an ABI tag A<N>, find an N2 < N such that A<N2>::_S_is_valid_v<_Tp> ==
4628// true, N2 is a power-of-2, and A<N2>::_S_is_partial<_Tp> is false. Break
4629// recursion at 2 elements in the resulting ABI tag. In this case
4630// type::_S_is_valid_v<_Tp> may be false.
4631template <template <int> class _Abi, int _Bytes, typename _Tp>
4632 struct __find_next_valid_abi
4633 {
4634 static constexpr auto
4635 _S_choose()
4636 {
4637 constexpr int _NextBytes = std::__bit_ceil(_Bytes) / 2;
4638 using _NextAbi = _Abi<_NextBytes>;
4639 if constexpr (_NextBytes < sizeof(_Tp) * 2) // break recursion
4640 return _Abi<_Bytes>();
4641 else if constexpr (_NextAbi::template _S_is_partial<_Tp> == false
4642 && _NextAbi::template _S_is_valid_v<_Tp>)
4643 return _NextAbi();
4644 else
4645 return __find_next_valid_abi<_Abi, _NextBytes, _Tp>::_S_choose();
4646 }
4647
4648 using type = decltype(_S_choose());
4649 };
4650
4651template <int _Bytes, typename _Tp>
4652 struct __find_next_valid_abi<__scalar_abi_wrapper, _Bytes, _Tp>
4653 { using type = simd_abi::scalar; };
4654
4655// _AbiList {{{1
4656template <template <int> class...>
4657 struct _AbiList
4658 {
4659 template <typename, int> static constexpr bool _S_has_valid_abi = false;
4660 template <typename, int> using _FirstValidAbi = void;
4661 template <typename, int> using _BestAbi = void;
4662 };
4663
4664template <template <int> class _A0, template <int> class... _Rest>
4665 struct _AbiList<_A0, _Rest...>
4666 {
4667 template <typename _Tp, int _Np>
4668 static constexpr bool _S_has_valid_abi
4669 = _A0<sizeof(_Tp) * _Np>::template _S_is_valid_v<
4670 _Tp> || _AbiList<_Rest...>::template _S_has_valid_abi<_Tp, _Np>;
4671
4672 template <typename _Tp, int _Np>
4673 using _FirstValidAbi = conditional_t<
4674 _A0<sizeof(_Tp) * _Np>::template _S_is_valid_v<_Tp>,
4675 typename __decay_abi<_A0<sizeof(_Tp) * _Np>>::type,
4676 typename _AbiList<_Rest...>::template _FirstValidAbi<_Tp, _Np>>;
4677
4678 template <typename _Tp, int _Np>
4679 static constexpr auto
4680 _S_determine_best_abi()
4681 {
4682 static_assert(_Np >= 1);
4683 constexpr int _Bytes = sizeof(_Tp) * _Np;
4684 if constexpr (_Np == 1)
4685 return __make_dependent_t<_Tp, simd_abi::scalar>{};
4686 else
4687 {
4688 constexpr int __fullsize = _A0<_Bytes>::template _S_full_size<_Tp>;
4689 // _A0<_Bytes> is good if:
4690 // 1. The ABI tag is valid for _Tp
4691 // 2. The storage overhead is no more than padding to fill the next
4692 // power-of-2 number of bytes
4693 if constexpr (_A0<_Bytes>::template _S_is_valid_v<_Tp>
4694 && ((__is_sve_abi<_A0<_Bytes>>() && __have_sve
4695 && (_Np <= __sve_vectorized_size_bytes/sizeof(_Tp)))
4696 || (__fullsize / 2 < _Np))
4697 )
4698 return typename __decay_abi<_A0<_Bytes>>::type{};
4699 else
4700 {
4701 using _Bp =
4702 typename __find_next_valid_abi<_A0, _Bytes, _Tp>::type;
4703 if constexpr (_Bp::template _S_is_valid_v<
4704 _Tp> && _Bp::template _S_size<_Tp> <= _Np)
4705 return _Bp{};
4706 else
4707 return
4708 typename _AbiList<_Rest...>::template _BestAbi<_Tp, _Np>{};
4709 }
4710 }
4711 }
4712
4713 template <typename _Tp, int _Np>
4714 using _BestAbi = decltype(_S_determine_best_abi<_Tp, _Np>());
4715 };
4716
4717// }}}1
4718
4719// the following lists all native ABIs, which makes them accessible to
4720// simd_abi::deduce and select_best_vector_type_t (for fixed_size). Order
4721// matters: Whatever comes first has higher priority.
4722using _AllNativeAbis = _AbiList<
4723#if _GLIBCXX_SIMD_HAVE_SVE
4724 simd_abi::_SveAbi,
4725#endif
4726 simd_abi::_VecBltnBtmsk, simd_abi::_VecBuiltin, __scalar_abi_wrapper>;
4727
4728using _NoSveAllNativeAbis = _AbiList<simd_abi::_VecBltnBtmsk, simd_abi::_VecBuiltin,
4729 __scalar_abi_wrapper>;
4730
4731// valid _SimdTraits specialization {{{1
4732template <typename _Tp, typename _Abi>
4733 struct _SimdTraits<_Tp, _Abi, void_t<typename _Abi::template _IsValid<_Tp>>>
4734 : _Abi::template __traits<_Tp> {};
4735
4736// __deduce_impl specializations {{{1
4737// try all native ABIs (including scalar) first
4738template <typename _Tp, size_t _Np>
4739 struct __deduce_impl<
4740 _Tp, _Np, enable_if_t<_AllNativeAbis::template _S_has_valid_abi<_Tp, _Np>>>
4741 { using type = _AllNativeAbis::_FirstValidAbi<_Tp, _Np>; };
4742
4743template <typename _Tp, size_t _Np>
4744 struct __no_sve_deduce_impl<
4745 _Tp, _Np, enable_if_t<_NoSveAllNativeAbis::template _S_has_valid_abi<_Tp, _Np>>>
4746 { using type = _NoSveAllNativeAbis::_FirstValidAbi<_Tp, _Np>; };
4747
4748// fall back to fixed_size only if scalar and native ABIs don't match
4749template <typename _Tp, size_t _Np, typename = void>
4750 struct __deduce_fixed_size_fallback {};
4751
4752template <typename _Tp, size_t _Np>
4753 struct __deduce_fixed_size_fallback<_Tp, _Np,
4754 enable_if_t<simd_abi::fixed_size<_Np>::template _S_is_valid_v<_Tp>>>
4755 { using type = simd_abi::fixed_size<_Np>; };
4756
4757template <typename _Tp, size_t _Np, typename>
4758 struct __deduce_impl : public __deduce_fixed_size_fallback<_Tp, _Np> {};
4759
4760template <typename _Tp, size_t _Np, typename>
4761 struct __no_sve_deduce_impl
4762 : public __deduce_fixed_size_fallback<_Tp, _Np>
4763 {};
4764
4765
4766//}}}1
4767/// @endcond
4768
4769// simd_mask {{{
4770template <typename _Tp, typename _Abi>
4771 class simd_mask : public _SimdTraits<_Tp, _Abi>::_MaskBase
4772 {
4773 // types, tags, and friends {{{
4774 using _Traits = _SimdTraits<_Tp, _Abi>;
4775 using _MemberType = typename _Traits::_MaskMember;
4776
4777 // We map all masks with equal element sizeof to a single integer type, the
4778 // one given by __int_for_sizeof_t<_Tp>. This is the approach
4779 // [[gnu::vector_size(N)]] types take as well and it reduces the number of
4780 // template specializations in the implementation classes.
4781 using _Ip = __int_for_sizeof_t<_Tp>;
4782 static constexpr _Ip* _S_type_tag = nullptr;
4783
4784 friend typename _Traits::_MaskBase;
4785 friend class simd<_Tp, _Abi>; // to construct masks on return
4786 friend typename _Traits::_SimdImpl; // to construct masks on return and
4787 // inspect data on masked operations
4788 public:
4789 using _Impl = typename _Traits::_MaskImpl;
4790 friend _Impl;
4791
4792 // }}}
4793 // member types {{{
4794 using value_type = bool;
4795 using reference = _SmartReference<_MemberType, _Impl, value_type>;
4796 using simd_type = simd<_Tp, _Abi>;
4797 using abi_type = _Abi;
4798
4799 // }}}
4800 static constexpr size_t size() // {{{
4801 { return __size_or_zero_v<_Tp, _Abi>; }
4802
4803 // }}}
4804 // constructors & assignment {{{
4805 simd_mask() = default;
4806 simd_mask(const simd_mask&) = default;
4807 simd_mask(simd_mask&&) = default;
4808 simd_mask& operator=(const simd_mask&) = default;
4809 simd_mask& operator=(simd_mask&&) = default;
4810
4811 // }}}
4812 // access to internal representation (optional feature) {{{
4813 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR explicit
4814 simd_mask(typename _Traits::_MaskCastType __init)
4815 : _M_data{__init} {}
4816 // conversions to internal type is done in _MaskBase
4817
4818 // }}}
4819 // bitset interface (extension to be proposed) {{{
4820 // TS_FEEDBACK:
4821 // Conversion of simd_mask to and from bitset makes it much easier to
4822 // interface with other facilities. I suggest adding `static
4823 // simd_mask::from_bitset` and `simd_mask::to_bitset`.
4824 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR static simd_mask
4825 __from_bitset(bitset<size()> bs)
4826 { return {__bitset_init, bs}; }
4827
4828 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR bitset<size()>
4829 __to_bitset() const
4830 { return _Impl::_S_to_bits(_M_data)._M_to_bitset(); }
4831
4832 // }}}
4833 // explicit broadcast constructor {{{
4834 _GLIBCXX_SIMD_ALWAYS_INLINE explicit _GLIBCXX_SIMD_CONSTEXPR
4835 simd_mask(value_type __x)
4836 : _M_data(_Impl::template _S_broadcast<_Ip>(__x)) {}
4837
4838 // }}}
4839 // implicit type conversion constructor {{{
4840 #ifdef _GLIBCXX_SIMD_ENABLE_IMPLICIT_MASK_CAST
4841 // proposed improvement
4842 template <typename _Up, typename _A2,
4843 typename = enable_if_t<simd_size_v<_Up, _A2> == size()>>
4844 _GLIBCXX_SIMD_ALWAYS_INLINE explicit(sizeof(_MemberType)
4845 != sizeof(typename _SimdTraits<_Up, _A2>::_MaskMember))
4846 simd_mask(const simd_mask<_Up, _A2>& __x)
4847 : simd_mask(__proposed::static_simd_cast<simd_mask>(__x)) {}
4848 #else
4849 // conforming to ISO/IEC 19570:2018
4850 template <typename _Up, typename = enable_if_t<conjunction<
4851 is_same<abi_type, simd_abi::fixed_size<size()>>,
4852 is_same<_Up, _Up>>::value>>
4853 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR
4854 simd_mask(const simd_mask<_Up, simd_abi::fixed_size<size()>>& __x)
4855 : _M_data(_Impl::_S_from_bitmask(__data(__x), _S_type_tag)) {}
4856 #endif
4857
4858 // }}}
4859 // load constructor {{{
4860 template <typename _Flags>
4861 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR
4862 simd_mask(const value_type* __mem, _IsSimdFlagType<_Flags>)
4863 : _M_data(_Impl::template _S_load<_Ip>(_Flags::template _S_apply<simd_mask>(__mem))) {}
4864
4865 template <typename _Flags>
4866 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR
4867 simd_mask(const value_type* __mem, simd_mask __k, _IsSimdFlagType<_Flags>)
4868 : _M_data{}
4869 {
4870 _M_data = _Impl::_S_masked_load(_M_data, __k._M_data,
4871 _Flags::template _S_apply<simd_mask>(__mem));
4872 }
4873
4874 // }}}
4875 // loads [simd_mask.load] {{{
4876 template <typename _Flags>
4877 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR void
4878 copy_from(const value_type* __mem, _IsSimdFlagType<_Flags>)
4879 { _M_data = _Impl::template _S_load<_Ip>(_Flags::template _S_apply<simd_mask>(__mem)); }
4880
4881 // }}}
4882 // stores [simd_mask.store] {{{
4883 template <typename _Flags>
4884 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR void
4885 copy_to(value_type* __mem, _IsSimdFlagType<_Flags>) const
4886 { _Impl::_S_store(_M_data, _Flags::template _S_apply<simd_mask>(__mem)); }
4887
4888 // }}}
4889 // scalar access {{{
4890 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR reference
4891 operator[](size_t __i)
4892 {
4893 if (__i >= size())
4894 __invoke_ub("Subscript %d is out of range [0, %d]", __i, size() - 1);
4895 return {_M_data, int(__i)};
4896 }
4897
4898 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR value_type
4899 operator[](size_t __i) const
4900 {
4901 if (__i >= size())
4902 __invoke_ub("Subscript %d is out of range [0, %d]", __i, size() - 1);
4903 if constexpr (__is_scalar_abi<_Abi>())
4904 return _M_data;
4905 else
4906 return static_cast<bool>(_M_data[__i]);
4907 }
4908
4909 // }}}
4910 // negation {{{
4911 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR simd_mask
4912 operator!() const
4913 { return {__private_init, _Impl::_S_bit_not(_M_data)}; }
4914
4915 // }}}
4916 // simd_mask binary operators [simd_mask.binary] {{{
4917 #ifdef _GLIBCXX_SIMD_ENABLE_IMPLICIT_MASK_CAST
4918 // simd_mask<int> && simd_mask<uint> needs disambiguation
4919 template <typename _Up, typename _A2,
4920 typename = enable_if_t<is_convertible_v<simd_mask<_Up, _A2>, simd_mask>>>
4921 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask
4922 operator&&(const simd_mask& __x, const simd_mask<_Up, _A2>& __y)
4923 {
4924 return {__private_init,
4925 _Impl::_S_logical_and(__x._M_data, simd_mask(__y)._M_data)};
4926 }
4927
4928 template <typename _Up, typename _A2,
4929 typename = enable_if_t<is_convertible_v<simd_mask<_Up, _A2>, simd_mask>>>
4930 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask
4931 operator||(const simd_mask& __x, const simd_mask<_Up, _A2>& __y)
4932 {
4933 return {__private_init,
4934 _Impl::_S_logical_or(__x._M_data, simd_mask(__y)._M_data)};
4935 }
4936 #endif // _GLIBCXX_SIMD_ENABLE_IMPLICIT_MASK_CAST
4937
4938 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask
4939 operator&&(const simd_mask& __x, const simd_mask& __y)
4940 { return {__private_init, _Impl::_S_logical_and(__x._M_data, __y._M_data)}; }
4941
4942 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask
4943 operator||(const simd_mask& __x, const simd_mask& __y)
4944 { return {__private_init, _Impl::_S_logical_or(__x._M_data, __y._M_data)}; }
4945
4946 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask
4947 operator&(const simd_mask& __x, const simd_mask& __y)
4948 { return {__private_init, _Impl::_S_bit_and(__x._M_data, __y._M_data)}; }
4949
4950 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask
4951 operator|(const simd_mask& __x, const simd_mask& __y)
4952 { return {__private_init, _Impl::_S_bit_or(__x._M_data, __y._M_data)}; }
4953
4954 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask
4955 operator^(const simd_mask& __x, const simd_mask& __y)
4956 { return {__private_init, _Impl::_S_bit_xor(__x._M_data, __y._M_data)}; }
4957
4958 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask&
4959 operator&=(simd_mask& __x, const simd_mask& __y)
4960 {
4961 __x._M_data = _Impl::_S_bit_and(__x._M_data, __y._M_data);
4962 return __x;
4963 }
4964
4965 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask&
4966 operator|=(simd_mask& __x, const simd_mask& __y)
4967 {
4968 __x._M_data = _Impl::_S_bit_or(__x._M_data, __y._M_data);
4969 return __x;
4970 }
4971
4972 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask&
4973 operator^=(simd_mask& __x, const simd_mask& __y)
4974 {
4975 __x._M_data = _Impl::_S_bit_xor(__x._M_data, __y._M_data);
4976 return __x;
4977 }
4978
4979 // }}}
4980 // simd_mask compares [simd_mask.comparison] {{{
4981 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask
4982 operator==(const simd_mask& __x, const simd_mask& __y)
4983 { return !operator!=(__x, __y); }
4984
4985 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask
4986 operator!=(const simd_mask& __x, const simd_mask& __y)
4987 { return {__private_init, _Impl::_S_bit_xor(__x._M_data, __y._M_data)}; }
4988
4989 // }}}
4990 // private_init ctor {{{
4991 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
4992 simd_mask(_PrivateInit, typename _Traits::_MaskMember __init)
4993 : _M_data(__init) {}
4994
4995 // }}}
4996 // private_init generator ctor {{{
4997 template <typename _Fp, typename = decltype(bool(declval<_Fp>()(size_t())))>
4998 _GLIBCXX_SIMD_INTRINSIC constexpr
4999 simd_mask(_PrivateInit, _Fp&& __gen)
5000 : _M_data()
5001 {
5002 __execute_n_times<size()>([&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
5003 _Impl::_S_set(_M_data, __i, __gen(__i));
5004 });
5005 }
5006
5007 // }}}
5008 // bitset_init ctor {{{
5009 _GLIBCXX_SIMD_INTRINSIC constexpr
5010 simd_mask(_BitsetInit, bitset<size()> __init)
5011 : _M_data(_Impl::_S_from_bitmask(_SanitizedBitMask<size()>(__init), _S_type_tag))
5012 {}
5013
5014 // }}}
5015 // __cvt {{{
5016 // TS_FEEDBACK:
5017 // The conversion operator this implements should be a ctor on simd_mask.
5018 // Once you call .__cvt() on a simd_mask it converts conveniently.
5019 // A useful variation: add `explicit(sizeof(_Tp) != sizeof(_Up))`
5020 struct _CvtProxy
5021 {
5022 template <typename _Up, typename _A2,
5023 typename = enable_if_t<simd_size_v<_Up, _A2> == simd_size_v<_Tp, _Abi>>>
5024 _GLIBCXX_SIMD_ALWAYS_INLINE
5025 operator simd_mask<_Up, _A2>() &&
5026 {
5027 using namespace std::experimental::__proposed;
5028 return static_simd_cast<simd_mask<_Up, _A2>>(_M_data);
5029 }
5030
5031 const simd_mask<_Tp, _Abi>& _M_data;
5032 };
5033
5034 _GLIBCXX_SIMD_INTRINSIC _CvtProxy
5035 __cvt() const
5036 { return {*this}; }
5037
5038 // }}}
5039 // operator?: overloads (suggested extension) {{{
5040 #ifdef __GXX_CONDITIONAL_IS_OVERLOADABLE__
5041 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask
5042 operator?:(const simd_mask& __k, const simd_mask& __where_true,
5043 const simd_mask& __where_false)
5044 {
5045 auto __ret = __where_false;
5046 _Impl::_S_masked_assign(__k._M_data, __ret._M_data, __where_true._M_data);
5047 return __ret;
5048 }
5049
5050 template <typename _U1, typename _U2,
5051 typename _Rp = simd<common_type_t<_U1, _U2>, _Abi>,
5052 typename = enable_if_t<conjunction_v<
5053 is_convertible<_U1, _Rp>, is_convertible<_U2, _Rp>,
5054 is_convertible<simd_mask, typename _Rp::mask_type>>>>
5055 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend _Rp
5056 operator?:(const simd_mask& __k, const _U1& __where_true,
5057 const _U2& __where_false)
5058 {
5059 _Rp __ret = __where_false;
5060 _Rp::_Impl::_S_masked_assign(
5061 __data(static_cast<typename _Rp::mask_type>(__k)), __data(__ret),
5062 __data(static_cast<_Rp>(__where_true)));
5063 return __ret;
5064 }
5065
5066 #ifdef _GLIBCXX_SIMD_ENABLE_IMPLICIT_MASK_CAST
5067 template <typename _Kp, typename _Ak, typename _Up, typename _Au,
5068 typename = enable_if_t<
5069 conjunction_v<is_convertible<simd_mask<_Kp, _Ak>, simd_mask>,
5070 is_convertible<simd_mask<_Up, _Au>, simd_mask>>>>
5071 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask
5072 operator?:(const simd_mask<_Kp, _Ak>& __k, const simd_mask& __where_true,
5073 const simd_mask<_Up, _Au>& __where_false)
5074 {
5075 simd_mask __ret = __where_false;
5076 _Impl::_S_masked_assign(simd_mask(__k)._M_data, __ret._M_data,
5077 __where_true._M_data);
5078 return __ret;
5079 }
5080 #endif // _GLIBCXX_SIMD_ENABLE_IMPLICIT_MASK_CAST
5081 #endif // __GXX_CONDITIONAL_IS_OVERLOADABLE__
5082
5083 // }}}
5084 // _M_is_constprop {{{
5085 _GLIBCXX_SIMD_INTRINSIC constexpr bool
5086 _M_is_constprop() const
5087 {
5088 if constexpr (__is_scalar_abi<_Abi>())
5089 return __builtin_constant_p(_M_data);
5090 else
5091 return _M_data._M_is_constprop();
5092 }
5093
5094 // }}}
5095
5096 private:
5097 friend const auto& __data<_Tp, abi_type>(const simd_mask&);
5098 friend auto& __data<_Tp, abi_type>(simd_mask&);
5099 alignas(_Traits::_S_mask_align) _MemberType _M_data;
5100 };
5101
5102// }}}
5103
5104/// @cond undocumented
5105// __data(simd_mask) {{{
5106template <typename _Tp, typename _Ap>
5107 _GLIBCXX_SIMD_INTRINSIC constexpr const auto&
5108 __data(const simd_mask<_Tp, _Ap>& __x)
5109 { return __x._M_data; }
5110
5111template <typename _Tp, typename _Ap>
5112 _GLIBCXX_SIMD_INTRINSIC constexpr auto&
5113 __data(simd_mask<_Tp, _Ap>& __x)
5114 { return __x._M_data; }
5115
5116// }}}
5117/// @endcond
5118
5119// simd_mask reductions [simd_mask.reductions] {{{
5120template <typename _Tp, typename _Abi>
5121 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR bool
5122 all_of(const simd_mask<_Tp, _Abi>& __k) noexcept
5123 {
5124 if (__builtin_is_constant_evaluated() || __k._M_is_constprop())
5125 {
5126 for (size_t __i = 0; __i < simd_size_v<_Tp, _Abi>; ++__i)
5127 if (!__k[__i])
5128 return false;
5129 return true;
5130 }
5131 else
5132 return _Abi::_MaskImpl::_S_all_of(__k);
5133 }
5134
5135template <typename _Tp, typename _Abi>
5136 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR bool
5137 any_of(const simd_mask<_Tp, _Abi>& __k) noexcept
5138 {
5139 if (__builtin_is_constant_evaluated() || __k._M_is_constprop())
5140 {
5141 for (size_t __i = 0; __i < simd_size_v<_Tp, _Abi>; ++__i)
5142 if (__k[__i])
5143 return true;
5144 return false;
5145 }
5146 else
5147 return _Abi::_MaskImpl::_S_any_of(__k);
5148 }
5149
5150template <typename _Tp, typename _Abi>
5151 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR bool
5152 none_of(const simd_mask<_Tp, _Abi>& __k) noexcept
5153 {
5154 if (__builtin_is_constant_evaluated() || __k._M_is_constprop())
5155 {
5156 for (size_t __i = 0; __i < simd_size_v<_Tp, _Abi>; ++__i)
5157 if (__k[__i])
5158 return false;
5159 return true;
5160 }
5161 else
5162 return _Abi::_MaskImpl::_S_none_of(__k);
5163 }
5164
5165template <typename _Tp, typename _Abi>
5166 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR bool
5167 some_of(const simd_mask<_Tp, _Abi>& __k) noexcept
5168 {
5169 if (__builtin_is_constant_evaluated() || __k._M_is_constprop())
5170 {
5171 for (size_t __i = 1; __i < simd_size_v<_Tp, _Abi>; ++__i)
5172 if (__k[__i] != __k[__i - 1])
5173 return true;
5174 return false;
5175 }
5176 else
5177 return _Abi::_MaskImpl::_S_some_of(__k);
5178 }
5179
5180template <typename _Tp, typename _Abi>
5181 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR int
5182 popcount(const simd_mask<_Tp, _Abi>& __k) noexcept
5183 {
5184 if (__builtin_is_constant_evaluated() || __k._M_is_constprop())
5185 {
5186 const int __r = __call_with_subscripts<simd_size_v<_Tp, _Abi>>(
5187 __k, [](auto... __elements) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
5188 return ((__elements != 0) + ...);
5189 });
5190 if (__builtin_is_constant_evaluated() || __builtin_constant_p(__r))
5191 return __r;
5192 }
5193 return _Abi::_MaskImpl::_S_popcount(__k);
5194 }
5195
5196template <typename _Tp, typename _Abi>
5197 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR int
5198 find_first_set(const simd_mask<_Tp, _Abi>& __k)
5199 {
5200 if (__builtin_is_constant_evaluated() || __k._M_is_constprop())
5201 {
5202 constexpr size_t _Np = simd_size_v<_Tp, _Abi>;
5203 const size_t _Idx = __call_with_n_evaluations<_Np>(
5204 [](auto... __indexes) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
5205 return std::min({__indexes...});
5206 }, [&](auto __i) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
5207 return __k[__i] ? +__i : _Np;
5208 });
5209 if (_Idx >= _Np)
5210 __invoke_ub("find_first_set(empty mask) is UB");
5211 if (__builtin_constant_p(_Idx))
5212 return _Idx;
5213 }
5214 return _Abi::_MaskImpl::_S_find_first_set(__k);
5215 }
5216
5217template <typename _Tp, typename _Abi>
5218 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR int
5219 find_last_set(const simd_mask<_Tp, _Abi>& __k)
5220 {
5221 if (__builtin_is_constant_evaluated() || __k._M_is_constprop())
5222 {
5223 constexpr size_t _Np = simd_size_v<_Tp, _Abi>;
5224 const int _Idx = __call_with_n_evaluations<_Np>(
5225 [](auto... __indexes) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
5226 return std::max({__indexes...});
5227 }, [&](auto __i) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
5228 return __k[__i] ? int(__i) : -1;
5229 });
5230 if (_Idx < 0)
5231 __invoke_ub("find_first_set(empty mask) is UB");
5232 if (__builtin_constant_p(_Idx))
5233 return _Idx;
5234 }
5235 return _Abi::_MaskImpl::_S_find_last_set(__k);
5236 }
5237
5238_GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR bool
5239all_of(_ExactBool __x) noexcept
5240{ return __x; }
5241
5242_GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR bool
5243any_of(_ExactBool __x) noexcept
5244{ return __x; }
5245
5246_GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR bool
5247none_of(_ExactBool __x) noexcept
5248{ return !__x; }
5249
5250_GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR bool
5251some_of(_ExactBool) noexcept
5252{ return false; }
5253
5254_GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR int
5255popcount(_ExactBool __x) noexcept
5256{ return __x; }
5257
5258_GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR int
5259find_first_set(_ExactBool)
5260{ return 0; }
5261
5262_GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR int
5263find_last_set(_ExactBool)
5264{ return 0; }
5265
5266// }}}
5267
5268/// @cond undocumented
5269// _SimdIntOperators{{{1
5270template <typename _V, typename _Tp, typename _Abi, bool>
5271 class _SimdIntOperators {};
5272
5273template <typename _V, typename _Tp, typename _Abi>
5274 class _SimdIntOperators<_V, _Tp, _Abi, true>
5275 {
5276 using _Impl = typename _SimdTraits<_Tp, _Abi>::_SimdImpl;
5277
5278 _GLIBCXX_SIMD_INTRINSIC constexpr const _V&
5279 __derived() const
5280 { return *static_cast<const _V*>(this); }
5281
5282 template <typename _Up>
5283 _GLIBCXX_SIMD_INTRINSIC static _GLIBCXX_SIMD_CONSTEXPR _V
5284 _S_make_derived(_Up&& __d)
5285 { return {__private_init, static_cast<_Up&&>(__d)}; }
5286
5287 public:
5288 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5289 _V&
5290 operator%=(_V& __lhs, const _V& __x)
5291 { return __lhs = __lhs % __x; }
5292
5293 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5294 _V&
5295 operator&=(_V& __lhs, const _V& __x)
5296 { return __lhs = __lhs & __x; }
5297
5298 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5299 _V&
5300 operator|=(_V& __lhs, const _V& __x)
5301 { return __lhs = __lhs | __x; }
5302
5303 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5304 _V&
5305 operator^=(_V& __lhs, const _V& __x)
5306 { return __lhs = __lhs ^ __x; }
5307
5308 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5309 _V&
5310 operator<<=(_V& __lhs, const _V& __x)
5311 { return __lhs = __lhs << __x; }
5312
5313 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5314 _V&
5315 operator>>=(_V& __lhs, const _V& __x)
5316 { return __lhs = __lhs >> __x; }
5317
5318 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5319 _V&
5320 operator<<=(_V& __lhs, int __x)
5321 { return __lhs = __lhs << __x; }
5322
5323 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5324 _V&
5325 operator>>=(_V& __lhs, int __x)
5326 { return __lhs = __lhs >> __x; }
5327
5328 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5329 _V
5330 operator%(const _V& __x, const _V& __y)
5331 {
5332 return _SimdIntOperators::_S_make_derived(
5333 _Impl::_S_modulus(__data(__x), __data(__y)));
5334 }
5335
5336 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5337 _V
5338 operator&(const _V& __x, const _V& __y)
5339 {
5340 return _SimdIntOperators::_S_make_derived(
5341 _Impl::_S_bit_and(__data(__x), __data(__y)));
5342 }
5343
5344 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5345 _V
5346 operator|(const _V& __x, const _V& __y)
5347 {
5348 return _SimdIntOperators::_S_make_derived(
5349 _Impl::_S_bit_or(__data(__x), __data(__y)));
5350 }
5351
5352 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5353 _V
5354 operator^(const _V& __x, const _V& __y)
5355 {
5356 return _SimdIntOperators::_S_make_derived(
5357 _Impl::_S_bit_xor(__data(__x), __data(__y)));
5358 }
5359
5360 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5361 _V
5362 operator<<(const _V& __x, const _V& __y)
5363 {
5364 return _SimdIntOperators::_S_make_derived(
5365 _Impl::_S_bit_shift_left(__data(__x), __data(__y)));
5366 }
5367
5368 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5369 _V
5370 operator>>(const _V& __x, const _V& __y)
5371 {
5372 return _SimdIntOperators::_S_make_derived(
5373 _Impl::_S_bit_shift_right(__data(__x), __data(__y)));
5374 }
5375
5376 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5377 _V
5378 operator<<(const _V& __x, int __y)
5379 {
5380 if (__y < 0)
5381 __invoke_ub("The behavior is undefined if the right operand of a "
5382 "shift operation is negative. [expr.shift]\nA shift by "
5383 "%d was requested",
5384 __y);
5385 if (size_t(__y) >= sizeof(declval<_Tp>() << __y) * __CHAR_BIT__)
5386 __invoke_ub(
5387 "The behavior is undefined if the right operand of a "
5388 "shift operation is greater than or equal to the width of the "
5389 "promoted left operand. [expr.shift]\nA shift by %d was requested",
5390 __y);
5391 return _SimdIntOperators::_S_make_derived(
5392 _Impl::_S_bit_shift_left(__data(__x), __y));
5393 }
5394
5395 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5396 _V
5397 operator>>(const _V& __x, int __y)
5398 {
5399 if (__y < 0)
5400 __invoke_ub(
5401 "The behavior is undefined if the right operand of a shift "
5402 "operation is negative. [expr.shift]\nA shift by %d was requested",
5403 __y);
5404 if (size_t(__y) >= sizeof(declval<_Tp>() << __y) * __CHAR_BIT__)
5405 __invoke_ub(
5406 "The behavior is undefined if the right operand of a shift "
5407 "operation is greater than or equal to the width of the promoted "
5408 "left operand. [expr.shift]\nA shift by %d was requested",
5409 __y);
5410 return _SimdIntOperators::_S_make_derived(
5411 _Impl::_S_bit_shift_right(__data(__x), __y));
5412 }
5413
5414 // unary operators (for integral _Tp)
5415 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR
5416 _V
5417 operator~() const
5418 { return {__private_init, _Impl::_S_complement(__derived()._M_data)}; }
5419 };
5420
5421//}}}1
5422/// @endcond
5423
5424// simd {{{
5425template <typename _Tp, typename _Abi>
5426 class simd : public _SimdIntOperators<
5427 simd<_Tp, _Abi>, _Tp, _Abi,
5428 conjunction<is_integral<_Tp>,
5429 typename _SimdTraits<_Tp, _Abi>::_IsValid>::value>,
5430 public _SimdTraits<_Tp, _Abi>::_SimdBase
5431 {
5432 using _Traits = _SimdTraits<_Tp, _Abi>;
5433 using _MemberType = typename _Traits::_SimdMember;
5434 using _CastType = typename _Traits::_SimdCastType;
5435 static constexpr _Tp* _S_type_tag = nullptr;
5436 friend typename _Traits::_SimdBase;
5437
5438 public:
5439 using _Impl = typename _Traits::_SimdImpl;
5440 friend _Impl;
5441 friend _SimdIntOperators<simd, _Tp, _Abi, true>;
5442
5443 using value_type = _Tp;
5444 using reference = _SmartReference<_MemberType, _Impl, value_type>;
5445 using mask_type = simd_mask<_Tp, _Abi>;
5446 using abi_type = _Abi;
5447
5448 static constexpr size_t size()
5449 { return __size_or_zero_v<_Tp, _Abi>; }
5450
5451 _GLIBCXX_SIMD_CONSTEXPR simd() = default;
5452 _GLIBCXX_SIMD_CONSTEXPR simd(const simd&) = default;
5453 _GLIBCXX_SIMD_CONSTEXPR simd(simd&&) noexcept = default;
5454 _GLIBCXX_SIMD_CONSTEXPR simd& operator=(const simd&) = default;
5455 _GLIBCXX_SIMD_CONSTEXPR simd& operator=(simd&&) noexcept = default;
5456
5457 // implicit broadcast constructor
5458 template <typename _Up,
5459 typename = enable_if_t<!is_same_v<__remove_cvref_t<_Up>, bool>>>
5460 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR
5461 simd(_ValuePreservingOrInt<_Up, value_type>&& __x)
5462 : _M_data(
5463 _Impl::_S_broadcast(static_cast<value_type>(static_cast<_Up&&>(__x))))
5464 {}
5465
5466 // implicit type conversion constructor (convert from fixed_size to
5467 // fixed_size)
5468 template <typename _Up>
5469 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR
5470 simd(const simd<_Up, simd_abi::fixed_size<size()>>& __x,
5471 enable_if_t<
5472 conjunction<
5473 is_same<simd_abi::fixed_size<size()>, abi_type>,
5474 negation<__is_narrowing_conversion<_Up, value_type>>,
5475 __converts_to_higher_integer_rank<_Up, value_type>>::value,
5476 void*> = nullptr)
5477 : simd{static_cast<array<_Up, size()>>(__x).data(), vector_aligned} {}
5478
5479 // explicit type conversion constructor
5480#ifdef _GLIBCXX_SIMD_ENABLE_STATIC_CAST
5481 template <typename _Up, typename _A2,
5482 typename = decltype(static_simd_cast<simd>(
5483 declval<const simd<_Up, _A2>&>()))>
5484 _GLIBCXX_SIMD_ALWAYS_INLINE explicit _GLIBCXX_SIMD_CONSTEXPR
5485 simd(const simd<_Up, _A2>& __x)
5486 : simd(static_simd_cast<simd>(__x)) {}
5487#endif // _GLIBCXX_SIMD_ENABLE_STATIC_CAST
5488
5489 // generator constructor
5490 template <typename _Fp>
5491 _GLIBCXX_SIMD_ALWAYS_INLINE explicit _GLIBCXX_SIMD_CONSTEXPR
5492 simd(_Fp&& __gen, _ValuePreservingOrInt<decltype(declval<_Fp>()(
5493 declval<_SizeConstant<0>&>())),
5494 value_type>* = nullptr)
5495 : _M_data(_Impl::_S_generator(static_cast<_Fp&&>(__gen), _S_type_tag)) {}
5496
5497 // load constructor
5498 template <typename _Up, typename _Flags>
5499 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR
5500 simd(const _Up* __mem, _IsSimdFlagType<_Flags>)
5501 : _M_data(
5502 _Impl::_S_load(_Flags::template _S_apply<simd>(__mem), _S_type_tag))
5503 {}
5504
5505 // loads [simd.load]
5506 template <typename _Up, typename _Flags>
5507 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR void
5508 copy_from(const _Vectorizable<_Up>* __mem, _IsSimdFlagType<_Flags>)
5509 {
5510 _M_data = static_cast<decltype(_M_data)>(
5511 _Impl::_S_load(_Flags::template _S_apply<simd>(__mem), _S_type_tag));
5512 }
5513
5514 // stores [simd.store]
5515 template <typename _Up, typename _Flags>
5516 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR void
5517 copy_to(_Vectorizable<_Up>* __mem, _IsSimdFlagType<_Flags>) const
5518 {
5519 _Impl::_S_store(_M_data, _Flags::template _S_apply<simd>(__mem),
5520 _S_type_tag);
5521 }
5522
5523 // scalar access
5524 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR reference
5525 operator[](size_t __i)
5526 { return {_M_data, int(__i)}; }
5527
5528 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR value_type
5529 operator[]([[maybe_unused]] size_t __i) const
5530 {
5531 if constexpr (__is_scalar_abi<_Abi>())
5532 {
5533 _GLIBCXX_DEBUG_ASSERT(__i == 0);
5534 return _M_data;
5535 }
5536 else
5537 return _M_data[__i];
5538 }
5539
5540 // increment and decrement:
5541 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR simd&
5542 operator++()
5543 {
5544 _Impl::_S_increment(_M_data);
5545 return *this;
5546 }
5547
5548 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR simd
5549 operator++(int)
5550 {
5551 simd __r = *this;
5552 _Impl::_S_increment(_M_data);
5553 return __r;
5554 }
5555
5556 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR simd&
5557 operator--()
5558 {
5559 _Impl::_S_decrement(_M_data);
5560 return *this;
5561 }
5562
5563 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR simd
5564 operator--(int)
5565 {
5566 simd __r = *this;
5567 _Impl::_S_decrement(_M_data);
5568 return __r;
5569 }
5570
5571 // unary operators (for any _Tp)
5572 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR mask_type
5573 operator!() const
5574 { return {__private_init, _Impl::_S_negate(_M_data)}; }
5575
5576 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR simd
5577 operator+() const
5578 { return *this; }
5579
5580 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR simd
5581 operator-() const
5582 { return {__private_init, _Impl::_S_unary_minus(_M_data)}; }
5583
5584 // access to internal representation (suggested extension)
5585 _GLIBCXX_SIMD_ALWAYS_INLINE explicit _GLIBCXX_SIMD_CONSTEXPR
5586 simd(_CastType __init) : _M_data(__init) {}
5587
5588 // compound assignment [simd.cassign]
5589 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd&
5590 operator+=(simd& __lhs, const simd& __x)
5591 { return __lhs = __lhs + __x; }
5592
5593 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd&
5594 operator-=(simd& __lhs, const simd& __x)
5595 { return __lhs = __lhs - __x; }
5596
5597 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd&
5598 operator*=(simd& __lhs, const simd& __x)
5599 { return __lhs = __lhs * __x; }
5600
5601 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd&
5602 operator/=(simd& __lhs, const simd& __x)
5603 { return __lhs = __lhs / __x; }
5604
5605 // binary operators [simd.binary]
5606 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd
5607 operator+(const simd& __x, const simd& __y)
5608 { return {__private_init, _Impl::_S_plus(__x._M_data, __y._M_data)}; }
5609
5610 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd
5611 operator-(const simd& __x, const simd& __y)
5612 { return {__private_init, _Impl::_S_minus(__x._M_data, __y._M_data)}; }
5613
5614 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd
5615 operator*(const simd& __x, const simd& __y)
5616 { return {__private_init, _Impl::_S_multiplies(__x._M_data, __y._M_data)}; }
5617
5618 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd
5619 operator/(const simd& __x, const simd& __y)
5620 { return {__private_init, _Impl::_S_divides(__x._M_data, __y._M_data)}; }
5621
5622 // compares [simd.comparison]
5623 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend mask_type
5624 operator==(const simd& __x, const simd& __y)
5625 { return simd::_S_make_mask(_Impl::_S_equal_to(__x._M_data, __y._M_data)); }
5626
5627 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend mask_type
5628 operator!=(const simd& __x, const simd& __y)
5629 {
5630 return simd::_S_make_mask(
5631 _Impl::_S_not_equal_to(__x._M_data, __y._M_data));
5632 }
5633
5634 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend mask_type
5635 operator<(const simd& __x, const simd& __y)
5636 { return simd::_S_make_mask(_Impl::_S_less(__x._M_data, __y._M_data)); }
5637
5638 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend mask_type
5639 operator<=(const simd& __x, const simd& __y)
5640 {
5641 return simd::_S_make_mask(_Impl::_S_less_equal(__x._M_data, __y._M_data));
5642 }
5643
5644 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend mask_type
5645 operator>(const simd& __x, const simd& __y)
5646 { return simd::_S_make_mask(_Impl::_S_less(__y._M_data, __x._M_data)); }
5647
5648 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend mask_type
5649 operator>=(const simd& __x, const simd& __y)
5650 {
5651 return simd::_S_make_mask(_Impl::_S_less_equal(__y._M_data, __x._M_data));
5652 }
5653
5654 // operator?: overloads (suggested extension) {{{
5655#ifdef __GXX_CONDITIONAL_IS_OVERLOADABLE__
5656 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd
5657 operator?:(const mask_type& __k, const simd& __where_true,
5658 const simd& __where_false)
5659 {
5660 auto __ret = __where_false;
5661 _Impl::_S_masked_assign(__data(__k), __data(__ret), __data(__where_true));
5662 return __ret;
5663 }
5664
5665#endif // __GXX_CONDITIONAL_IS_OVERLOADABLE__
5666 // }}}
5667
5668 // "private" because of the first arguments's namespace
5669 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
5670 simd(_PrivateInit, const _MemberType& __init)
5671 : _M_data(__init) {}
5672
5673 // "private" because of the first arguments's namespace
5674 _GLIBCXX_SIMD_INTRINSIC
5675 simd(_BitsetInit, bitset<size()> __init) : _M_data()
5676 { where(mask_type(__bitset_init, __init), *this) = ~*this; }
5677
5678 _GLIBCXX_SIMD_INTRINSIC constexpr bool
5679 _M_is_constprop() const
5680 {
5681 if constexpr (__is_scalar_abi<_Abi>())
5682 return __builtin_constant_p(_M_data);
5683 else
5684 return _M_data._M_is_constprop();
5685 }
5686
5687 private:
5688 _GLIBCXX_SIMD_INTRINSIC static constexpr mask_type
5689 _S_make_mask(typename mask_type::_MemberType __k)
5690 { return {__private_init, __k}; }
5691
5692 friend const auto& __data<value_type, abi_type>(const simd&);
5693 friend auto& __data<value_type, abi_type>(simd&);
5694 alignas(_Traits::_S_simd_align) _MemberType _M_data;
5695 };
5696
5697// }}}
5698/// @cond undocumented
5699// __data {{{
5700template <typename _Tp, typename _Ap>
5701 _GLIBCXX_SIMD_INTRINSIC constexpr const auto&
5702 __data(const simd<_Tp, _Ap>& __x)
5703 { return __x._M_data; }
5704
5705template <typename _Tp, typename _Ap>
5706 _GLIBCXX_SIMD_INTRINSIC constexpr auto&
5707 __data(simd<_Tp, _Ap>& __x)
5708 { return __x._M_data; }
5709
5710// }}}
5711namespace __float_bitwise_operators { //{{{
5712template <typename _Tp, typename _Ap>
5713 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR simd<_Tp, _Ap>
5714 operator^(const simd<_Tp, _Ap>& __a, const simd<_Tp, _Ap>& __b)
5715 { return {__private_init, _Ap::_SimdImpl::_S_bit_xor(__data(__a), __data(__b))}; }
5716
5717template <typename _Tp, typename _Ap>
5718 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR simd<_Tp, _Ap>
5719 operator|(const simd<_Tp, _Ap>& __a, const simd<_Tp, _Ap>& __b)
5720 { return {__private_init, _Ap::_SimdImpl::_S_bit_or(__data(__a), __data(__b))}; }
5721
5722template <typename _Tp, typename _Ap>
5723 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR simd<_Tp, _Ap>
5724 operator&(const simd<_Tp, _Ap>& __a, const simd<_Tp, _Ap>& __b)
5725 { return {__private_init, _Ap::_SimdImpl::_S_bit_and(__data(__a), __data(__b))}; }
5726
5727template <typename _Tp, typename _Ap>
5728 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
5729 enable_if_t<is_floating_point_v<_Tp>, simd<_Tp, _Ap>>
5730 operator~(const simd<_Tp, _Ap>& __a)
5731 { return {__private_init, _Ap::_SimdImpl::_S_complement(__data(__a))}; }
5732} // namespace __float_bitwise_operators }}}
5733/// @endcond
5734
5735/// @}
5736_GLIBCXX_SIMD_END_NAMESPACE
5737
5738#endif // __cplusplus >= 201703L
5739#endif // _GLIBCXX_EXPERIMENTAL_SIMD_H
5740
5741// vim: foldmethod=marker foldmarker={{{,}}}
constexpr bool operator<=(const duration< _Rep1, _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)
Definition chrono.h:855
constexpr bool operator>=(const duration< _Rep1, _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)
Definition chrono.h:869
constexpr duration< __common_rep_t< _Rep1, __disable_if_is_duration< _Rep2 > >, _Period > operator%(const duration< _Rep1, _Period > &__d, const _Rep2 &__s)
Definition chrono.h:779
constexpr bool operator<(const duration< _Rep1, _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)
Definition chrono.h:822
constexpr bool operator>(const duration< _Rep1, _Period1 > &__lhs, const duration< _Rep2, _Period2 > &__rhs)
Definition chrono.h:862
constexpr complex< _Tp > operator*(const complex< _Tp > &__x, const complex< _Tp > &__y)
Return new complex value x times y.
Definition complex:400
constexpr complex< _Tp > operator-(const complex< _Tp > &__x, const complex< _Tp > &__y)
Return new complex value x minus y.
Definition complex:370
constexpr complex< _Tp > operator+(const complex< _Tp > &__x, const complex< _Tp > &__y)
Return new complex value x plus y.
Definition complex:340
constexpr complex< _Tp > operator/(const complex< _Tp > &__x, const complex< _Tp > &__y)
Return new complex value x divided by y.
Definition complex:430
typename remove_reference< _Tp >::type remove_reference_t
Alias template for remove_reference.
Definition type_traits:1733
typename make_unsigned< _Tp >::type make_unsigned_t
Alias template for make_unsigned.
Definition type_traits:2076
__bool_constant< true > true_type
The type used as a compile-time boolean with true value.
Definition type_traits:111
typename conditional< _Cond, _Iftrue, _Iffalse >::type conditional_t
Alias template for conditional.
Definition type_traits:2715
__bool_constant< false > false_type
The type used as a compile-time boolean with false value.
Definition type_traits:114
typename enable_if< _Cond, _Tp >::type enable_if_t
Alias template for enable_if.
Definition type_traits:2711
constexpr auto tuple_cat(_Tpls &&... __tpls) -> typename __tuple_cat_result< _Tpls... >::__type
Create a tuple containing all elements from multiple tuple-like objects.
Definition tuple:2779
auto declval() noexcept -> decltype(__declval< _Tp >(0))
Definition type_traits:2485
constexpr tuple< typename __decay_and_strip< _Elements >::__type... > make_tuple(_Elements &&... __args)
Create a tuple containing copies of the arguments.
Definition tuple:2642
constexpr std::remove_reference< _Tp >::type && move(_Tp &&__t) noexcept
Convert a value to an rvalue.
Definition move.h:137
_Tp * end(valarray< _Tp > &__va) noexcept
Return an iterator pointing to one past the last element of the valarray.
Definition valarray:1249
_Tp * begin(valarray< _Tp > &__va) noexcept
Return an iterator pointing to the first element of the valarray.
Definition valarray:1227
constexpr const _Tp & max(const _Tp &, const _Tp &)
This does what you think it does.
constexpr const _Tp & min(const _Tp &, const _Tp &)
This does what you think it does.
constexpr _Tp reduce(_InputIterator __first, _InputIterator __last, _Tp __init, _BinaryOperation __binary_op)
Calculate reduction of values in a range.
Definition numeric:291
void void_t
A metafunction that always yields void, used for detecting valid types.
ISO C++ entities toplevel namespace is std.
constexpr auto size(const _Container &__cont) noexcept(noexcept(__cont.size())) -> decltype(__cont.size())
Return the size of a container.
constexpr bitset< _Nb > operator^(const bitset< _Nb > &__x, const bitset< _Nb > &__y) noexcept
Global bitwise operations on bitsets.
Definition bitset:1577
std::basic_istream< _CharT, _Traits > & operator>>(std::basic_istream< _CharT, _Traits > &__is, bitset< _Nb > &__x)
Global I/O operators for bitsets.
Definition bitset:1597
std::basic_ostream< _CharT, _Traits > & operator<<(std::basic_ostream< _CharT, _Traits > &__os, const bitset< _Nb > &__x)
Global I/O operators for bitsets.
Definition bitset:1687
constexpr auto data(_Container &__cont) noexcept(noexcept(__cont.data())) -> decltype(__cont.data())
Return the data pointer of a container.
constexpr bitset< _Nb > operator|(const bitset< _Nb > &__x, const bitset< _Nb > &__y) noexcept
Global bitwise operations on bitsets.
Definition bitset:1567
constexpr bitset< _Nb > operator&(const bitset< _Nb > &__x, const bitset< _Nb > &__y) noexcept
Global bitwise operations on bitsets.
Definition bitset:1557