libstdc++: simd.h Source File

libstdc++

simd.h
1// Definition of the public simd interfaces -*- C++ -*-
2
3// Copyright (C) 2020-2026 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 _GLIBCXX_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 _GLIBCXX_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 && !_GLIBCXX_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 _GLIBCXX_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 _GLIBCXX_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 // allow _Tp == long double with -mlong-double-64
2473 static_assert(!(is_same_v<_Tp, long double>
2474 && sizeof(long double) > sizeof(double)),
2475 "no __intrinsic_type support for long double on x86");
2476
2477 static constexpr size_t _S_VBytes = _Bytes <= 16 ? 16 : _Bytes <= 32 ? 32 : 64;
2478
2479 using type [[__gnu__::__vector_size__(_S_VBytes)]]
2480 = conditional_t<is_integral_v<_Tp>, long long int, _Tp>;
2481 };
2482#endif // _GLIBCXX_SIMD_HAVE_SSE
2483
2484// }}}
2485#endif // _GLIBCXX_SIMD_HAVE_SSE_ABI
2486// __intrinsic_type (ARM){{{
2487#if _GLIBCXX_SIMD_HAVE_NEON
2488template <>
2489 struct __intrinsic_type<float, 8, void>
2490 { using type = float32x2_t; };
2491
2492template <>
2493 struct __intrinsic_type<float, 16, void>
2494 { using type = float32x4_t; };
2495
2496template <>
2497 struct __intrinsic_type<double, 8, void>
2498 {
2499#if _GLIBCXX_SIMD_HAVE_NEON_A64
2500 using type = float64x1_t;
2501#endif
2502 };
2503
2504template <>
2505 struct __intrinsic_type<double, 16, void>
2506 {
2507#if _GLIBCXX_SIMD_HAVE_NEON_A64
2508 using type = float64x2_t;
2509#endif
2510 };
2511
2512#define _GLIBCXX_SIMD_ARM_INTRIN(_Bits, _Np) \
2513template <> \
2514 struct __intrinsic_type<__int_with_sizeof_t<_Bits / 8>, \
2515 _Np * _Bits / 8, void> \
2516 { using type = int##_Bits##x##_Np##_t; }; \
2517template <> \
2518 struct __intrinsic_type<make_unsigned_t<__int_with_sizeof_t<_Bits / 8>>, \
2519 _Np * _Bits / 8, void> \
2520 { using type = uint##_Bits##x##_Np##_t; }
2521_GLIBCXX_SIMD_ARM_INTRIN(8, 8);
2522_GLIBCXX_SIMD_ARM_INTRIN(8, 16);
2523_GLIBCXX_SIMD_ARM_INTRIN(16, 4);
2524_GLIBCXX_SIMD_ARM_INTRIN(16, 8);
2525_GLIBCXX_SIMD_ARM_INTRIN(32, 2);
2526_GLIBCXX_SIMD_ARM_INTRIN(32, 4);
2527_GLIBCXX_SIMD_ARM_INTRIN(64, 1);
2528_GLIBCXX_SIMD_ARM_INTRIN(64, 2);
2529#undef _GLIBCXX_SIMD_ARM_INTRIN
2530
2531template <typename _Tp, size_t _Bytes>
2532 struct __intrinsic_type<_Tp, _Bytes, enable_if_t<__is_vectorizable_v<_Tp> && _Bytes <= 16>>
2533 {
2534 static constexpr int _SVecBytes = _Bytes <= 8 ? 8 : 16;
2535
2536 using _Ip = __int_for_sizeof_t<_Tp>;
2537
2538 using _Up = conditional_t<
2539 is_floating_point_v<_Tp>, _Tp,
2540 conditional_t<is_unsigned_v<_Tp>, make_unsigned_t<_Ip>, _Ip>>;
2541
2542 static_assert(!is_same_v<_Tp, _Up> || _SVecBytes != _Bytes,
2543 "should use explicit specialization above");
2544
2545 using type = typename __intrinsic_type<_Up, _SVecBytes>::type;
2546 };
2547#endif // _GLIBCXX_SIMD_HAVE_NEON
2548
2549// }}}
2550// __intrinsic_type (PPC){{{
2551#ifdef __ALTIVEC__
2552template <typename _Tp>
2553 struct __intrinsic_type_impl;
2554
2555#define _GLIBCXX_SIMD_PPC_INTRIN(_Tp) \
2556 template <> \
2557 struct __intrinsic_type_impl<_Tp> { using type = __vector _Tp; }
2558_GLIBCXX_SIMD_PPC_INTRIN(float);
2559#ifdef __VSX__
2560_GLIBCXX_SIMD_PPC_INTRIN(double);
2561#endif
2562_GLIBCXX_SIMD_PPC_INTRIN(signed char);
2563_GLIBCXX_SIMD_PPC_INTRIN(unsigned char);
2564_GLIBCXX_SIMD_PPC_INTRIN(signed short);
2565_GLIBCXX_SIMD_PPC_INTRIN(unsigned short);
2566_GLIBCXX_SIMD_PPC_INTRIN(signed int);
2567_GLIBCXX_SIMD_PPC_INTRIN(unsigned int);
2568#if defined __VSX__ || __SIZEOF_LONG__ == 4
2569_GLIBCXX_SIMD_PPC_INTRIN(signed long);
2570_GLIBCXX_SIMD_PPC_INTRIN(unsigned long);
2571#endif
2572#ifdef __VSX__
2573_GLIBCXX_SIMD_PPC_INTRIN(signed long long);
2574_GLIBCXX_SIMD_PPC_INTRIN(unsigned long long);
2575#endif
2576#undef _GLIBCXX_SIMD_PPC_INTRIN
2577
2578template <typename _Tp, size_t _Bytes>
2579 struct __intrinsic_type<_Tp, _Bytes, enable_if_t<__is_vectorizable_v<_Tp> && _Bytes <= 16>>
2580 {
2581 static constexpr bool _S_is_ldouble = is_same_v<_Tp, long double>;
2582
2583 // allow _Tp == long double with -mlong-double-64
2584 static_assert(!(_S_is_ldouble && sizeof(long double) > sizeof(double)),
2585 "no __intrinsic_type support for 128-bit floating point on PowerPC");
2586
2587#ifndef __VSX__
2588 static_assert(!(is_same_v<_Tp, double>
2589 || (_S_is_ldouble && sizeof(long double) == sizeof(double))),
2590 "no __intrinsic_type support for 64-bit floating point on PowerPC w/o VSX");
2591#endif
2592
2593 static constexpr auto __element_type()
2594 {
2595 if constexpr (is_floating_point_v<_Tp>)
2596 {
2597 if constexpr (_S_is_ldouble)
2598 return double {};
2599 else
2600 return _Tp {};
2601 }
2602 else if constexpr (is_signed_v<_Tp>)
2603 {
2604 if constexpr (sizeof(_Tp) == sizeof(_SChar))
2605 return _SChar {};
2606 else if constexpr (sizeof(_Tp) == sizeof(short))
2607 return short {};
2608 else if constexpr (sizeof(_Tp) == sizeof(int))
2609 return int {};
2610 else if constexpr (sizeof(_Tp) == sizeof(_LLong))
2611 return _LLong {};
2612 }
2613 else
2614 {
2615 if constexpr (sizeof(_Tp) == sizeof(_UChar))
2616 return _UChar {};
2617 else if constexpr (sizeof(_Tp) == sizeof(_UShort))
2618 return _UShort {};
2619 else if constexpr (sizeof(_Tp) == sizeof(_UInt))
2620 return _UInt {};
2621 else if constexpr (sizeof(_Tp) == sizeof(_ULLong))
2622 return _ULLong {};
2623 }
2624 }
2625
2626 using type = typename __intrinsic_type_impl<decltype(__element_type())>::type;
2627 };
2628#endif // __ALTIVEC__
2629
2630// }}}
2631// _SimdWrapper<bool>{{{1
2632template <size_t _Width>
2633 struct _SimdWrapper<bool, _Width,
2634 void_t<typename __bool_storage_member_type<_Width>::type>>
2635 {
2636 using _BuiltinType = typename __bool_storage_member_type<_Width>::type;
2637 using value_type = bool;
2638
2639 static constexpr size_t _S_full_size = sizeof(_BuiltinType) * __CHAR_BIT__;
2640
2641 _GLIBCXX_SIMD_INTRINSIC constexpr _SimdWrapper<bool, _S_full_size>
2642 __as_full_vector() const
2643 { return _M_data; }
2644
2645 _GLIBCXX_SIMD_INTRINSIC constexpr
2646 _SimdWrapper() = default;
2647
2648 _GLIBCXX_SIMD_INTRINSIC constexpr
2649 _SimdWrapper(_BuiltinType __k) : _M_data(__k) {};
2650
2651 _GLIBCXX_SIMD_INTRINSIC
2652 operator const _BuiltinType&() const
2653 { return _M_data; }
2654
2655 _GLIBCXX_SIMD_INTRINSIC
2656 operator _BuiltinType&()
2657 { return _M_data; }
2658
2659 _GLIBCXX_SIMD_INTRINSIC _BuiltinType
2660 __intrin() const
2661 { return _M_data; }
2662
2663 _GLIBCXX_SIMD_INTRINSIC constexpr value_type
2664 operator[](size_t __i) const
2665 { return _M_data & (_BuiltinType(1) << __i); }
2666
2667 template <size_t __i>
2668 _GLIBCXX_SIMD_INTRINSIC constexpr value_type
2669 operator[](_SizeConstant<__i>) const
2670 { return _M_data & (_BuiltinType(1) << __i); }
2671
2672 _GLIBCXX_SIMD_INTRINSIC constexpr void
2673 _M_set(size_t __i, value_type __x)
2674 {
2675 if (__x)
2676 _M_data |= (_BuiltinType(1) << __i);
2677 else
2678 _M_data &= ~(_BuiltinType(1) << __i);
2679 }
2680
2681 _GLIBCXX_SIMD_INTRINSIC constexpr bool
2682 _M_is_constprop() const
2683 { return __builtin_constant_p(_M_data); }
2684
2685 _GLIBCXX_SIMD_INTRINSIC constexpr bool
2686 _M_is_constprop_none_of() const
2687 {
2688 if (__builtin_constant_p(_M_data))
2689 {
2690 constexpr int __nbits = sizeof(_BuiltinType) * __CHAR_BIT__;
2691 constexpr _BuiltinType __active_mask
2692 = ~_BuiltinType() >> (__nbits - _Width);
2693 return (_M_data & __active_mask) == 0;
2694 }
2695 return false;
2696 }
2697
2698 _GLIBCXX_SIMD_INTRINSIC constexpr bool
2699 _M_is_constprop_all_of() const
2700 {
2701 if (__builtin_constant_p(_M_data))
2702 {
2703 constexpr int __nbits = sizeof(_BuiltinType) * __CHAR_BIT__;
2704 constexpr _BuiltinType __active_mask
2705 = ~_BuiltinType() >> (__nbits - _Width);
2706 return (_M_data & __active_mask) == __active_mask;
2707 }
2708 return false;
2709 }
2710
2711 _BuiltinType _M_data;
2712 };
2713
2714// _SimdWrapperBase{{{1
2715template <bool _MustZeroInitPadding, typename _BuiltinType>
2716 struct _SimdWrapperBase;
2717
2718template <typename _BuiltinType>
2719 struct _SimdWrapperBase<false, _BuiltinType> // no padding or no SNaNs
2720 {
2721 _GLIBCXX_SIMD_INTRINSIC constexpr
2722 _SimdWrapperBase() = default;
2723
2724 _GLIBCXX_SIMD_INTRINSIC constexpr
2725 _SimdWrapperBase(_BuiltinType __init) : _M_data(__init) {}
2726
2727 _BuiltinType _M_data;
2728 };
2729
2730template <typename _BuiltinType>
2731 struct _SimdWrapperBase<true, _BuiltinType> // with padding that needs to
2732 // never become SNaN
2733 {
2734 _GLIBCXX_SIMD_INTRINSIC constexpr
2735 _SimdWrapperBase() : _M_data() {}
2736
2737 _GLIBCXX_SIMD_INTRINSIC constexpr
2738 _SimdWrapperBase(_BuiltinType __init) : _M_data(__init) {}
2739
2740 _BuiltinType _M_data;
2741 };
2742
2743// }}}
2744// _SimdWrapper{{{
2745struct _DisabledSimdWrapper;
2746
2747template <typename _Tp, size_t _Width>
2748 struct _SimdWrapper<
2749 _Tp, _Width,
2750 void_t<__vector_type_t<_Tp, _Width>, __intrinsic_type_t<_Tp, _Width>>>
2751 : _SimdWrapperBase<__has_iec559_behavior<__signaling_NaN, _Tp>::value
2752 && sizeof(_Tp) * _Width
2753 == sizeof(__vector_type_t<_Tp, _Width>),
2754 __vector_type_t<_Tp, _Width>>
2755 {
2756 static constexpr bool _S_need_default_init
2757 = __has_iec559_behavior<__signaling_NaN, _Tp>::value
2758 and sizeof(_Tp) * _Width == sizeof(__vector_type_t<_Tp, _Width>);
2759
2760 using _BuiltinType = __vector_type_t<_Tp, _Width>;
2761
2762 using _Base = _SimdWrapperBase<_S_need_default_init, _BuiltinType>;
2763
2764 static_assert(__is_vectorizable_v<_Tp>);
2765 static_assert(_Width >= 2); // 1 doesn't make sense, use _Tp directly then
2766
2767 using value_type = _Tp;
2768
2769 static inline constexpr size_t _S_full_size
2770 = sizeof(_BuiltinType) / sizeof(value_type);
2771 static inline constexpr int _S_size = _Width;
2772 static inline constexpr bool _S_is_partial = _S_full_size != _S_size;
2773
2774 using _Base::_M_data;
2775
2776 _GLIBCXX_SIMD_INTRINSIC constexpr _SimdWrapper<_Tp, _S_full_size>
2777 __as_full_vector() const
2778 { return _M_data; }
2779
2780 _GLIBCXX_SIMD_INTRINSIC constexpr
2781 _SimdWrapper(initializer_list<_Tp> __init)
2782 : _Base(__generate_from_n_evaluations<_Width, _BuiltinType>(
2783 [&](auto __i) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
2784 return __init.begin()[__i.value];
2785 })) {}
2786
2787 _GLIBCXX_SIMD_INTRINSIC constexpr
2788 _SimdWrapper() = default;
2789
2790 _GLIBCXX_SIMD_INTRINSIC constexpr
2791 _SimdWrapper(const _SimdWrapper&) = default;
2792
2793 _GLIBCXX_SIMD_INTRINSIC constexpr
2794 _SimdWrapper(_SimdWrapper&&) = default;
2795
2796 _GLIBCXX_SIMD_INTRINSIC constexpr _SimdWrapper&
2797 operator=(const _SimdWrapper&) = default;
2798
2799 _GLIBCXX_SIMD_INTRINSIC constexpr _SimdWrapper&
2800 operator=(_SimdWrapper&&) = default;
2801
2802 // Convert from exactly matching __vector_type_t
2803 using _SimdWrapperBase<_S_need_default_init, _BuiltinType>::_SimdWrapperBase;
2804
2805 // Convert from __intrinsic_type_t if __intrinsic_type_t and __vector_type_t differ, otherwise
2806 // this ctor should not exist. Making the argument type unusable is our next best solution.
2807 _GLIBCXX_SIMD_INTRINSIC constexpr
2808 _SimdWrapper(conditional_t<is_same_v<_BuiltinType, __intrinsic_type_t<_Tp, _Width>>,
2809 _DisabledSimdWrapper, __intrinsic_type_t<_Tp, _Width>> __x)
2810 : _Base(__vector_bitcast<_Tp, _Width>(__x)) {}
2811
2812 // Convert from different __vector_type_t, but only if bit reinterpretation is a correct
2813 // conversion of the value_type
2814 template <typename _V, typename _TVT = _VectorTraits<_V>,
2815 typename = enable_if_t<sizeof(typename _TVT::value_type) == sizeof(_Tp)
2816 and sizeof(_V) == sizeof(_BuiltinType)
2817 and is_integral_v<_Tp>
2818 and is_integral_v<typename _TVT::value_type>>>
2819 _GLIBCXX_SIMD_INTRINSIC constexpr
2820 _SimdWrapper(_V __x)
2821 : _Base(reinterpret_cast<_BuiltinType>(__x)) {}
2822
2823 template <typename... _As,
2824 typename = enable_if_t<((is_same_v<simd_abi::scalar, _As> && ...)
2825 && sizeof...(_As) <= _Width)>>
2826 _GLIBCXX_SIMD_INTRINSIC constexpr
2827 operator _SimdTuple<_Tp, _As...>() const
2828 {
2829 return __generate_from_n_evaluations<sizeof...(_As), _SimdTuple<_Tp, _As...>>(
2830 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA
2831 { return _M_data[int(__i)]; });
2832 }
2833
2834 _GLIBCXX_SIMD_INTRINSIC constexpr
2835 operator const _BuiltinType&() const
2836 { return _M_data; }
2837
2838 _GLIBCXX_SIMD_INTRINSIC constexpr
2839 operator _BuiltinType&()
2840 { return _M_data; }
2841
2842 _GLIBCXX_SIMD_INTRINSIC constexpr _Tp
2843 operator[](size_t __i) const
2844 { return _M_data[__i]; }
2845
2846 template <size_t __i>
2847 _GLIBCXX_SIMD_INTRINSIC constexpr _Tp
2848 operator[](_SizeConstant<__i>) const
2849 { return _M_data[__i]; }
2850
2851 _GLIBCXX_SIMD_INTRINSIC constexpr void
2852 _M_set(size_t __i, _Tp __x)
2853 {
2854 if (__builtin_is_constant_evaluated())
2855 _M_data = __generate_from_n_evaluations<_Width, _BuiltinType>([&](auto __j) {
2856 return __j == __i ? __x : _M_data[__j()];
2857 });
2858 else
2859 _M_data[__i] = __x;
2860 }
2861
2862 _GLIBCXX_SIMD_INTRINSIC
2863 constexpr bool
2864 _M_is_constprop() const
2865 { return __builtin_constant_p(_M_data); }
2866
2867 _GLIBCXX_SIMD_INTRINSIC constexpr bool
2868 _M_is_constprop_none_of() const
2869 {
2870 if (__builtin_constant_p(_M_data))
2871 {
2872 bool __r = true;
2873 if constexpr (is_floating_point_v<_Tp>)
2874 {
2875 using _Ip = __int_for_sizeof_t<_Tp>;
2876 const auto __intdata = __vector_bitcast<_Ip>(_M_data);
2877 __execute_n_times<_Width>(
2878 [&](auto __i) { __r &= __intdata[__i.value] == _Ip(); });
2879 }
2880 else
2881 __execute_n_times<_Width>(
2882 [&](auto __i) { __r &= _M_data[__i.value] == _Tp(); });
2883 if (__builtin_constant_p(__r))
2884 return __r;
2885 }
2886 return false;
2887 }
2888
2889 _GLIBCXX_SIMD_INTRINSIC constexpr bool
2890 _M_is_constprop_all_of() const
2891 {
2892 if (__builtin_constant_p(_M_data))
2893 {
2894 bool __r = true;
2895 if constexpr (is_floating_point_v<_Tp>)
2896 {
2897 using _Ip = __int_for_sizeof_t<_Tp>;
2898 const auto __intdata = __vector_bitcast<_Ip>(_M_data);
2899 __execute_n_times<_Width>(
2900 [&](auto __i) { __r &= __intdata[__i.value] == ~_Ip(); });
2901 }
2902 else
2903 __execute_n_times<_Width>(
2904 [&](auto __i) { __r &= _M_data[__i.value] == ~_Tp(); });
2905 if (__builtin_constant_p(__r))
2906 return __r;
2907 }
2908 return false;
2909 }
2910 };
2911
2912// }}}
2913
2914// __vectorized_sizeof {{{
2915template <typename _Tp>
2916 constexpr size_t
2917 __vectorized_sizeof()
2918 {
2919 if constexpr (!__is_vectorizable_v<_Tp>)
2920 return 0;
2921
2922 if constexpr (sizeof(_Tp) <= 8)
2923 {
2924 // X86:
2925 if constexpr (__have_avx512bw)
2926 return 64;
2927 if constexpr (__have_avx512f && sizeof(_Tp) >= 4)
2928 return 64;
2929 if constexpr (__have_avx2)
2930 return 32;
2931 if constexpr (__have_avx && is_floating_point_v<_Tp>)
2932 return 32;
2933 if constexpr (__have_sse2)
2934 return 16;
2935 if constexpr (__have_sse && is_same_v<_Tp, float>)
2936 return 16;
2937 /* The following is too much trouble because of mixed MMX and x87 code.
2938 * While nothing here explicitly calls MMX instructions of registers,
2939 * they are still emitted but no EMMS cleanup is done.
2940 if constexpr (__have_mmx && sizeof(_Tp) <= 4 && is_integral_v<_Tp>)
2941 return 8;
2942 */
2943
2944 // PowerPC:
2945 if constexpr (__have_power8vec
2946 || (__have_power_vmx && (sizeof(_Tp) < 8))
2947 || (__have_power_vsx && is_floating_point_v<_Tp>) )
2948 return 16;
2949
2950 // ARM:
2951 if constexpr (__have_neon_a64)
2952 return 16;
2953 if constexpr (__have_neon_a32 and (not is_floating_point_v<_Tp>
2954 or is_same_v<_Tp, float>))
2955 return 16;
2956 if constexpr (__have_neon
2957 && sizeof(_Tp) < 8
2958 // Only allow fp if the user allows non-ICE559 fp (e.g.
2959 // via -ffast-math). ARMv7 NEON fp is not conforming to
2960 // IEC559.
2961 && (__support_neon_float || !is_floating_point_v<_Tp>))
2962 return 16;
2963 }
2964
2965 return sizeof(_Tp);
2966 }
2967
2968// }}}
2969namespace simd_abi {
2970// most of simd_abi is defined in simd_detail.h
2971template <typename _Tp>
2972 inline constexpr int max_fixed_size
2973 = ((__have_avx512bw && sizeof(_Tp) == 1)
2974 || (__have_sve && __sve_vectorized_size_bytes/sizeof(_Tp) >= 64)) ? 64 : 32;
2975
2976// compatible {{{
2977#if defined __x86_64__ || defined __aarch64__
2978template <typename _Tp>
2979 using compatible = conditional_t<(sizeof(_Tp) <= 8), _VecBuiltin<16>, scalar>;
2980#elif defined __ARM_NEON
2981// FIXME: not sure, probably needs to be scalar (or dependent on the hard-float
2982// ABI?)
2983template <typename _Tp>
2984 using compatible
2985 = conditional_t<(sizeof(_Tp) < 8
2986 && (__support_neon_float || !is_floating_point_v<_Tp>)),
2987 _VecBuiltin<16>, scalar>;
2988#else
2989template <typename>
2990 using compatible = scalar;
2991#endif
2992
2993// }}}
2994// native {{{
2995template <typename _Tp>
2996 constexpr auto
2997 __determine_native_abi()
2998 {
2999 constexpr size_t __bytes = __vectorized_sizeof<_Tp>();
3000 if constexpr (__bytes == sizeof(_Tp))
3001 return static_cast<scalar*>(nullptr);
3002 else if constexpr (__have_sve)
3003 return static_cast<_SveAbi<__sve_vectorized_size_bytes>*>(nullptr);
3004 else if constexpr (__have_avx512vl || (__have_avx512f && __bytes == 64))
3005 return static_cast<_VecBltnBtmsk<__bytes>*>(nullptr);
3006 else
3007 return static_cast<_VecBuiltin<__bytes>*>(nullptr);
3008 }
3009
3010template <typename _Tp, typename = enable_if_t<__is_vectorizable_v<_Tp>>>
3011 using native = remove_pointer_t<decltype(__determine_native_abi<_Tp>())>;
3012
3013// }}}
3014// __default_abi {{{
3015#if defined _GLIBCXX_SIMD_DEFAULT_ABI
3016template <typename _Tp>
3017 using __default_abi = _GLIBCXX_SIMD_DEFAULT_ABI<_Tp>;
3018#else
3019template <typename _Tp>
3020 using __default_abi = compatible<_Tp>;
3021#endif
3022
3023// }}}
3024} // namespace simd_abi
3025
3026// traits {{{1
3027template <typename _Tp>
3028 struct is_simd_flag_type
3029 : false_type
3030 {};
3031
3032template <>
3033 struct is_simd_flag_type<element_aligned_tag>
3034 : true_type
3035 {};
3036
3037template <>
3038 struct is_simd_flag_type<vector_aligned_tag>
3039 : true_type
3040 {};
3041
3042template <size_t _Np>
3043 struct is_simd_flag_type<overaligned_tag<_Np>>
3044 : __bool_constant<(_Np > 0) and __has_single_bit(_Np)>
3045 {};
3046
3047template <typename _Tp>
3048 inline constexpr bool is_simd_flag_type_v = is_simd_flag_type<_Tp>::value;
3049
3050template <typename _Tp, typename = enable_if_t<is_simd_flag_type_v<_Tp>>>
3051 using _IsSimdFlagType = _Tp;
3052
3053// is_abi_tag {{{2
3054template <typename _Tp, typename = void_t<>>
3055 struct is_abi_tag : false_type {};
3056
3057template <typename _Tp>
3058 struct is_abi_tag<_Tp, void_t<typename _Tp::_IsValidAbiTag>>
3059 : public _Tp::_IsValidAbiTag {};
3060
3061template <typename _Tp>
3062 inline constexpr bool is_abi_tag_v = is_abi_tag<_Tp>::value;
3063
3064// is_simd(_mask) {{{2
3065template <typename _Tp>
3066 struct is_simd : public false_type {};
3067
3068template <typename _Tp>
3069 inline constexpr bool is_simd_v = is_simd<_Tp>::value;
3070
3071template <typename _Tp>
3072 struct is_simd_mask : public false_type {};
3073
3074template <typename _Tp>
3075inline constexpr bool is_simd_mask_v = is_simd_mask<_Tp>::value;
3076
3077// simd_size {{{2
3078template <typename _Tp, typename _Abi, typename = void>
3079 struct __simd_size_impl {};
3080
3081template <typename _Tp, typename _Abi>
3082 struct __simd_size_impl<
3083 _Tp, _Abi,
3084 enable_if_t<conjunction_v<__is_vectorizable<_Tp>, is_abi_tag<_Abi>>>>
3085 : _SizeConstant<_Abi::template _S_size<_Tp>> {};
3086
3087template <typename _Tp, typename _Abi = simd_abi::__default_abi<_Tp>>
3088 struct simd_size : __simd_size_impl<_Tp, _Abi> {};
3089
3090template <typename _Tp, typename _Abi = simd_abi::__default_abi<_Tp>>
3091 inline constexpr size_t simd_size_v = simd_size<_Tp, _Abi>::value;
3092
3093// simd_abi::deduce {{{2
3094template <typename _Tp, size_t _Np, typename = void>
3095 struct __deduce_impl;
3096
3097template <typename _Tp, size_t _Np, typename = void>
3098 struct __no_sve_deduce_impl;
3099
3100namespace simd_abi {
3101/**
3102 * @tparam _Tp The requested `value_type` for the elements.
3103 * @tparam _Np The requested number of elements.
3104 * @tparam _Abis This parameter is ignored, since this implementation cannot
3105 * make any use of it. Either __a good native ABI is matched and used as `type`
3106 * alias, or the `fixed_size<_Np>` ABI is used, which internally is built from
3107 * the best matching native ABIs.
3108 */
3109 template <typename _Tp, size_t _Np, typename...>
3110 struct deduce : __deduce_impl<_Tp, _Np> {};
3111
3112template <typename _Tp, size_t _Np, typename... _Abis>
3113 using deduce_t = typename deduce<_Tp, _Np, _Abis...>::type;
3114
3115template <typename _Tp, size_t _Np, typename...>
3116 struct __no_sve_deduce : __no_sve_deduce_impl<_Tp, _Np> {};
3117
3118template <typename _Tp, size_t _Np, typename... _Abis>
3119 using __no_sve_deduce_t = typename __no_sve_deduce<_Tp, _Np, _Abis...>::type;
3120} // namespace simd_abi
3121
3122// }}}2
3123// rebind_simd {{{2
3124template <typename _Tp, typename _V, typename = void>
3125 struct rebind_simd;
3126
3127template <typename _Tp, typename _Up, typename _Abi>
3128 struct rebind_simd<_Tp, simd<_Up, _Abi>,
3129 void_t<std::conditional_t<!__is_sve_abi<_Abi>(),
3130 simd_abi::__no_sve_deduce_t<_Tp, simd_size_v<_Up, _Abi>, _Abi>,
3131 simd_abi::deduce_t<_Tp, simd_size_v<_Up, _Abi>, _Abi>>>>
3132 {
3133 using type = simd<_Tp, std::conditional_t<
3134 !__is_sve_abi<_Abi>(),
3135 simd_abi::__no_sve_deduce_t<_Tp, simd_size_v<_Up, _Abi>, _Abi>,
3136 simd_abi::deduce_t<_Tp, simd_size_v<_Up, _Abi>, _Abi>>>;
3137 };
3138
3139template <typename _Tp, typename _Up, typename _Abi>
3140 struct rebind_simd<_Tp, simd_mask<_Up, _Abi>,
3141 void_t<std::conditional_t<!__is_sve_abi<_Abi>(),
3142 simd_abi::__no_sve_deduce_t<_Tp, simd_size_v<_Up, _Abi>, _Abi>,
3143 simd_abi::deduce_t<_Tp, simd_size_v<_Up, _Abi>, _Abi>>>>
3144 {
3145 using type = simd_mask<_Tp, std::conditional_t<
3146 !__is_sve_abi<_Abi>(),
3147 simd_abi::__no_sve_deduce_t<_Tp, simd_size_v<_Up, _Abi>, _Abi>,
3148 simd_abi::deduce_t<_Tp, simd_size_v<_Up, _Abi>, _Abi>>>;
3149 };
3150
3151template <typename _Tp, typename _V>
3152 using rebind_simd_t = typename rebind_simd<_Tp, _V>::type;
3153
3154// resize_simd {{{2
3155template <int _Np, typename _V, typename = void>
3156 struct resize_simd;
3157
3158template <int _Np, typename _Tp, typename _Abi>
3159 struct resize_simd<_Np, simd<_Tp, _Abi>, void_t<simd_abi::deduce_t<_Tp, _Np, _Abi>>>
3160 { using type = simd<_Tp, simd_abi::deduce_t<_Tp, _Np, _Abi>>; };
3161
3162template <int _Np, typename _Tp, typename _Abi>
3163 struct resize_simd<_Np, simd_mask<_Tp, _Abi>, void_t<simd_abi::deduce_t<_Tp, _Np, _Abi>>>
3164 { using type = simd_mask<_Tp, simd_abi::deduce_t<_Tp, _Np, _Abi>>; };
3165
3166template <int _Np, typename _V>
3167 using resize_simd_t = typename resize_simd<_Np, _V>::type;
3168
3169// }}}2
3170// memory_alignment {{{2
3171template <typename _Tp, typename _Up = typename _Tp::value_type>
3172 struct memory_alignment
3173 : public _SizeConstant<vector_aligned_tag::_S_alignment<_Tp, _Up>> {};
3174
3175template <typename _Tp, typename _Up = typename _Tp::value_type>
3176 inline constexpr size_t memory_alignment_v = memory_alignment<_Tp, _Up>::value;
3177
3178// class template simd [simd] {{{1
3179template <typename _Tp, typename _Abi = simd_abi::__default_abi<_Tp>>
3180 class simd;
3181
3182template <typename _Tp, typename _Abi>
3183 struct is_simd<simd<_Tp, _Abi>> : public true_type {};
3184
3185template <typename _Tp>
3186 using native_simd = simd<_Tp, simd_abi::native<_Tp>>;
3187
3188template <typename _Tp, int _Np>
3189 using fixed_size_simd = simd<_Tp, simd_abi::fixed_size<_Np>>;
3190
3191template <typename _Tp, size_t _Np>
3192 using __deduced_simd = simd<_Tp, simd_abi::deduce_t<_Tp, _Np>>;
3193
3194// class template simd_mask [simd_mask] {{{1
3195template <typename _Tp, typename _Abi = simd_abi::__default_abi<_Tp>>
3196 class simd_mask;
3197
3198template <typename _Tp, typename _Abi>
3199 struct is_simd_mask<simd_mask<_Tp, _Abi>> : public true_type {};
3200
3201template <typename _Tp>
3202 using native_simd_mask = simd_mask<_Tp, simd_abi::native<_Tp>>;
3203
3204template <typename _Tp, int _Np>
3205 using fixed_size_simd_mask = simd_mask<_Tp, simd_abi::fixed_size<_Np>>;
3206
3207template <typename _Tp, size_t _Np>
3208 using __deduced_simd_mask = simd_mask<_Tp, simd_abi::deduce_t<_Tp, _Np>>;
3209
3210// casts [simd.casts] {{{1
3211// static_simd_cast {{{2
3212template <typename _Tp, typename _Up, typename _Ap, bool = is_simd_v<_Tp>, typename = void>
3213 struct __static_simd_cast_return_type;
3214
3215template <typename _Tp, typename _A0, typename _Up, typename _Ap>
3216 struct __static_simd_cast_return_type<simd_mask<_Tp, _A0>, _Up, _Ap, false, void>
3217 : __static_simd_cast_return_type<simd<_Tp, _A0>, _Up, _Ap> {};
3218
3219template <typename _Tp, typename _Up, typename _Ap>
3220 struct __static_simd_cast_return_type<
3221 _Tp, _Up, _Ap, true, enable_if_t<_Tp::size() == simd_size_v<_Up, _Ap>>>
3222 { using type = _Tp; };
3223
3224template <typename _Tp, typename _Ap>
3225 struct __static_simd_cast_return_type<_Tp, _Tp, _Ap, false,
3226#ifdef _GLIBCXX_SIMD_FIX_P2TS_ISSUE66
3227 enable_if_t<__is_vectorizable_v<_Tp>>
3228#else
3229 void
3230#endif
3231 >
3232 { using type = simd<_Tp, _Ap>; };
3233
3234template <typename _Tp, typename = void>
3235 struct __safe_make_signed { using type = _Tp;};
3236
3237template <typename _Tp>
3238 struct __safe_make_signed<_Tp, enable_if_t<is_integral_v<_Tp>>>
3239 {
3240 // the extra make_unsigned_t is because of PR85951
3241 using type = make_signed_t<make_unsigned_t<_Tp>>;
3242 };
3243
3244template <typename _Tp>
3245 using safe_make_signed_t = typename __safe_make_signed<_Tp>::type;
3246
3247template <typename _Tp, typename _Up, typename _Ap>
3248 struct __static_simd_cast_return_type<_Tp, _Up, _Ap, false,
3249#ifdef _GLIBCXX_SIMD_FIX_P2TS_ISSUE66
3250 enable_if_t<__is_vectorizable_v<_Tp>>
3251#else
3252 void
3253#endif
3254 >
3255 {
3256 using type = conditional_t<
3257 (is_integral_v<_Up> && is_integral_v<_Tp> &&
3258#ifndef _GLIBCXX_SIMD_FIX_P2TS_ISSUE65
3259 is_signed_v<_Up> != is_signed_v<_Tp> &&
3260#endif
3261 is_same_v<safe_make_signed_t<_Up>, safe_make_signed_t<_Tp>>),
3262 simd<_Tp, _Ap>, fixed_size_simd<_Tp, simd_size_v<_Up, _Ap>>>;
3263 };
3264
3265template <typename _Tp, typename _Up, typename _Ap,
3266 typename _R
3267 = typename __static_simd_cast_return_type<_Tp, _Up, _Ap>::type>
3268 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR _R
3269 static_simd_cast(const simd<_Up, _Ap>& __x)
3270 {
3271 if constexpr (is_same<_R, simd<_Up, _Ap>>::value)
3272 return __x;
3273 else
3274 {
3275 _SimdConverter<_Up, _Ap, typename _R::value_type, typename _R::abi_type>
3276 __c;
3277 return _R(__private_init, __c(__data(__x)));
3278 }
3279 }
3280
3281namespace __proposed {
3282template <typename _Tp, typename _Up, typename _Ap,
3283 typename _R
3284 = typename __static_simd_cast_return_type<_Tp, _Up, _Ap>::type>
3285 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR typename _R::mask_type
3286 static_simd_cast(const simd_mask<_Up, _Ap>& __x)
3287 {
3288 using _RM = typename _R::mask_type;
3289 return {__private_init, _RM::abi_type::_MaskImpl::template _S_convert<
3290 typename _RM::simd_type::value_type>(__x)};
3291 }
3292
3293template <typename _To, typename _Up, typename _Abi>
3294 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
3295 _To
3296 simd_bit_cast(const simd<_Up, _Abi>& __x)
3297 {
3298 using _Tp = typename _To::value_type;
3299 using _ToMember = typename _SimdTraits<_Tp, typename _To::abi_type>::_SimdMember;
3300 using _From = simd<_Up, _Abi>;
3301 using _FromMember = typename _SimdTraits<_Up, _Abi>::_SimdMember;
3302 // with concepts, the following should be constraints
3303 static_assert(sizeof(_To) == sizeof(_From));
3304 static_assert(is_trivially_copyable_v<_Tp> && is_trivially_copyable_v<_Up>);
3305 static_assert(is_trivially_copyable_v<_ToMember> && is_trivially_copyable_v<_FromMember>);
3306#if __has_builtin(__builtin_bit_cast)
3307 return {__private_init, __builtin_bit_cast(_ToMember, __data(__x))};
3308#else
3309 return {__private_init, __bit_cast<_ToMember>(__data(__x))};
3310#endif
3311 }
3312
3313template <typename _To, typename _Up, typename _Abi>
3314 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
3315 _To
3316 simd_bit_cast(const simd_mask<_Up, _Abi>& __x)
3317 {
3318 using _From = simd_mask<_Up, _Abi>;
3319 static_assert(sizeof(_To) == sizeof(_From));
3320 static_assert(is_trivially_copyable_v<_From>);
3321 // _To can be simd<T, A>, specifically simd<T, fixed_size<N>> in which case _To is not trivially
3322 // copyable.
3323 if constexpr (is_simd_v<_To>)
3324 {
3325 using _Tp = typename _To::value_type;
3326 using _ToMember = typename _SimdTraits<_Tp, typename _To::abi_type>::_SimdMember;
3327 static_assert(is_trivially_copyable_v<_ToMember>);
3328#if __has_builtin(__builtin_bit_cast)
3329 return {__private_init, __builtin_bit_cast(_ToMember, __x)};
3330#else
3331 return {__private_init, __bit_cast<_ToMember>(__x)};
3332#endif
3333 }
3334 else
3335 {
3336 static_assert(is_trivially_copyable_v<_To>);
3337#if __has_builtin(__builtin_bit_cast)
3338 return __builtin_bit_cast(_To, __x);
3339#else
3340 return __bit_cast<_To>(__x);
3341#endif
3342 }
3343 }
3344} // namespace __proposed
3345
3346// simd_cast {{{2
3347template <typename _Tp, typename _Up, typename _Ap,
3348 typename _To = __value_type_or_identity_t<_Tp>>
3349 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR auto
3350 simd_cast(const simd<_ValuePreserving<_Up, _To>, _Ap>& __x)
3351 -> decltype(static_simd_cast<_Tp>(__x))
3352 { return static_simd_cast<_Tp>(__x); }
3353
3354namespace __proposed {
3355template <typename _Tp, typename _Up, typename _Ap,
3356 typename _To = __value_type_or_identity_t<_Tp>>
3357 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR auto
3358 simd_cast(const simd_mask<_ValuePreserving<_Up, _To>, _Ap>& __x)
3359 -> decltype(static_simd_cast<_Tp>(__x))
3360 { return static_simd_cast<_Tp>(__x); }
3361} // namespace __proposed
3362
3363// }}}2
3364// resizing_simd_cast {{{
3365namespace __proposed {
3366/* Proposed spec:
3367
3368template <class T, class U, class Abi>
3369T resizing_simd_cast(const simd<U, Abi>& x)
3370
3371p1 Constraints:
3372 - is_simd_v<T> is true and
3373 - T::value_type is the same type as U
3374
3375p2 Returns:
3376 A simd object with the i^th element initialized to x[i] for all i in the
3377 range of [0, min(T::size(), simd_size_v<U, Abi>)). If T::size() is larger
3378 than simd_size_v<U, Abi>, the remaining elements are value-initialized.
3379
3380template <class T, class U, class Abi>
3381T resizing_simd_cast(const simd_mask<U, Abi>& x)
3382
3383p1 Constraints: is_simd_mask_v<T> is true
3384
3385p2 Returns:
3386 A simd_mask object with the i^th element initialized to x[i] for all i in
3387the range of [0, min(T::size(), simd_size_v<U, Abi>)). If T::size() is larger
3388 than simd_size_v<U, Abi>, the remaining elements are initialized to false.
3389
3390 */
3391
3392template <typename _Tp, typename _Up, typename _Ap>
3393 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR enable_if_t<
3394 conjunction_v<is_simd<_Tp>, is_same<typename _Tp::value_type, _Up>>, _Tp>
3395 resizing_simd_cast(const simd<_Up, _Ap>& __x)
3396 {
3397 if constexpr (is_same_v<typename _Tp::abi_type, _Ap>)
3398 return __x;
3399 else if (__builtin_is_constant_evaluated())
3400 return _Tp([&](auto __i) constexpr {
3401 return __i < simd_size_v<_Up, _Ap> ? __x[__i] : _Up();
3402 });
3403 else if constexpr (simd_size_v<_Up, _Ap> == 1)
3404 {
3405 _Tp __r{};
3406 __r[0] = __x[0];
3407 return __r;
3408 }
3409 else if constexpr (_Tp::size() == 1)
3410 return __x[0];
3411 else if constexpr (sizeof(_Tp) == sizeof(__x)
3412 && !__is_fixed_size_abi_v<_Ap> && !__is_sve_abi<_Ap>())
3413 return {__private_init,
3414 __vector_bitcast<typename _Tp::value_type, _Tp::size()>(
3415 _Ap::_S_masked(__data(__x))._M_data)};
3416 else
3417 {
3418 _Tp __r{};
3419 __builtin_memcpy(&__data(__r), &__data(__x),
3420 sizeof(_Up)
3421 * std::min(_Tp::size(), simd_size_v<_Up, _Ap>));
3422 return __r;
3423 }
3424 }
3425
3426template <typename _Tp, typename _Up, typename _Ap>
3427 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
3428 enable_if_t<is_simd_mask_v<_Tp>, _Tp>
3429 resizing_simd_cast(const simd_mask<_Up, _Ap>& __x)
3430 {
3431 return {__private_init, _Tp::abi_type::_MaskImpl::template _S_convert<
3432 typename _Tp::simd_type::value_type>(__x)};
3433 }
3434} // namespace __proposed
3435
3436// }}}
3437// to_fixed_size {{{2
3438template <typename _Tp, int _Np>
3439 _GLIBCXX_SIMD_INTRINSIC fixed_size_simd<_Tp, _Np>
3440 to_fixed_size(const fixed_size_simd<_Tp, _Np>& __x)
3441 { return __x; }
3442
3443template <typename _Tp, int _Np>
3444 _GLIBCXX_SIMD_INTRINSIC fixed_size_simd_mask<_Tp, _Np>
3445 to_fixed_size(const fixed_size_simd_mask<_Tp, _Np>& __x)
3446 { return __x; }
3447
3448template <typename _Tp, typename _Ap>
3449 _GLIBCXX_SIMD_INTRINSIC fixed_size_simd<_Tp, simd_size_v<_Tp, _Ap>>
3450 to_fixed_size(const simd<_Tp, _Ap>& __x)
3451 {
3452 using _Rp = fixed_size_simd<_Tp, simd_size_v<_Tp, _Ap>>;
3453 return _Rp([&__x](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA { return __x[__i]; });
3454 }
3455
3456template <typename _Tp, typename _Ap>
3457 _GLIBCXX_SIMD_INTRINSIC fixed_size_simd_mask<_Tp, simd_size_v<_Tp, _Ap>>
3458 to_fixed_size(const simd_mask<_Tp, _Ap>& __x)
3459 {
3460 return {__private_init,
3461 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA { return __x[__i]; }};
3462 }
3463
3464// to_native {{{2
3465template <typename _Tp, int _Np>
3466 _GLIBCXX_SIMD_INTRINSIC
3467 enable_if_t<(_Np == native_simd<_Tp>::size()), native_simd<_Tp>>
3468 to_native(const fixed_size_simd<_Tp, _Np>& __x)
3469 {
3470 alignas(memory_alignment_v<native_simd<_Tp>>) _Tp __mem[_Np];
3471 __x.copy_to(__mem, vector_aligned);
3472 return {__mem, vector_aligned};
3473 }
3474
3475template <typename _Tp, int _Np>
3476 _GLIBCXX_SIMD_INTRINSIC
3477 enable_if_t<(_Np == native_simd_mask<_Tp>::size()), native_simd_mask<_Tp>>
3478 to_native(const fixed_size_simd_mask<_Tp, _Np>& __x)
3479 {
3480 return native_simd_mask<_Tp>(
3481 __private_init,
3482 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA { return __x[__i]; });
3483 }
3484
3485// to_compatible {{{2
3486template <typename _Tp, int _Np>
3487 _GLIBCXX_SIMD_INTRINSIC enable_if_t<(_Np == simd<_Tp>::size()), simd<_Tp>>
3488 to_compatible(const simd<_Tp, simd_abi::fixed_size<_Np>>& __x)
3489 {
3490 alignas(memory_alignment_v<simd<_Tp>>) _Tp __mem[_Np];
3491 __x.copy_to(__mem, vector_aligned);
3492 return {__mem, vector_aligned};
3493 }
3494
3495template <typename _Tp, int _Np>
3496 _GLIBCXX_SIMD_INTRINSIC
3497 enable_if_t<(_Np == simd_mask<_Tp>::size()), simd_mask<_Tp>>
3498 to_compatible(const simd_mask<_Tp, simd_abi::fixed_size<_Np>>& __x)
3499 {
3500 return simd_mask<_Tp>(
3501 __private_init,
3502 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA { return __x[__i]; });
3503 }
3504
3505// masked assignment [simd_mask.where] {{{1
3506
3507// where_expression {{{1
3508// const_where_expression<M, T> {{{2
3509template <typename _M, typename _Tp>
3510 class const_where_expression
3511 {
3512 using _V = _Tp;
3513 static_assert(is_same_v<_V, __remove_cvref_t<_Tp>>);
3514
3515 struct _Wrapper { using value_type = _V; };
3516
3517 protected:
3518 using _Impl = typename _V::_Impl;
3519
3520 using value_type =
3521 typename conditional_t<is_arithmetic_v<_V>, _Wrapper, _V>::value_type;
3522
3523 _GLIBCXX_SIMD_INTRINSIC friend const _M&
3524 __get_mask(const const_where_expression& __x)
3525 { return __x._M_k; }
3526
3527 _GLIBCXX_SIMD_INTRINSIC friend const _Tp&
3528 __get_lvalue(const const_where_expression& __x)
3529 { return __x._M_value; }
3530
3531 const _M& _M_k;
3532 _Tp& _M_value;
3533
3534 public:
3535 const_where_expression(const const_where_expression&) = delete;
3536
3537 const_where_expression& operator=(const const_where_expression&) = delete;
3538
3539 _GLIBCXX_SIMD_INTRINSIC constexpr
3540 const_where_expression(const _M& __kk, const _Tp& dd)
3541 : _M_k(__kk), _M_value(const_cast<_Tp&>(dd)) {}
3542
3543 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR _V
3544 operator-() const&&
3545 {
3546 return {__private_init,
3547 _Impl::template _S_masked_unary<negate>(__data(_M_k),
3548 __data(_M_value))};
3549 }
3550
3551 template <typename _Up, typename _Flags>
3552 [[nodiscard]] _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR _V
3553 copy_from(const _LoadStorePtr<_Up, value_type>* __mem, _IsSimdFlagType<_Flags>) const&&
3554 {
3555 return {__private_init,
3556 _Impl::_S_masked_load(__data(_M_value), __data(_M_k),
3557 _Flags::template _S_apply<_V>(__mem))};
3558 }
3559
3560 template <typename _Up, typename _Flags>
3561 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3562 copy_to(_LoadStorePtr<_Up, value_type>* __mem, _IsSimdFlagType<_Flags>) const&&
3563 {
3564 _Impl::_S_masked_store(__data(_M_value),
3565 _Flags::template _S_apply<_V>(__mem),
3566 __data(_M_k));
3567 }
3568 };
3569
3570// const_where_expression<bool, T> {{{2
3571template <typename _Tp>
3572 class const_where_expression<bool, _Tp>
3573 {
3574 using _M = bool;
3575 using _V = _Tp;
3576
3577 static_assert(is_same_v<_V, __remove_cvref_t<_Tp>>);
3578
3579 struct _Wrapper { using value_type = _V; };
3580
3581 protected:
3582 using value_type
3583 = typename conditional_t<is_arithmetic_v<_V>, _Wrapper, _V>::value_type;
3584
3585 _GLIBCXX_SIMD_INTRINSIC friend const _M&
3586 __get_mask(const const_where_expression& __x)
3587 { return __x._M_k; }
3588
3589 _GLIBCXX_SIMD_INTRINSIC friend const _Tp&
3590 __get_lvalue(const const_where_expression& __x)
3591 { return __x._M_value; }
3592
3593 const bool _M_k;
3594 _Tp& _M_value;
3595
3596 public:
3597 const_where_expression(const const_where_expression&) = delete;
3598 const_where_expression& operator=(const const_where_expression&) = delete;
3599
3600 _GLIBCXX_SIMD_INTRINSIC constexpr
3601 const_where_expression(const bool __kk, const _Tp& dd)
3602 : _M_k(__kk), _M_value(const_cast<_Tp&>(dd)) {}
3603
3604 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR _V
3605 operator-() const&&
3606 { return _M_k ? -_M_value : _M_value; }
3607
3608 template <typename _Up, typename _Flags>
3609 [[nodiscard]] _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR _V
3610 copy_from(const _LoadStorePtr<_Up, value_type>* __mem, _IsSimdFlagType<_Flags>) const&&
3611 { return _M_k ? static_cast<_V>(__mem[0]) : _M_value; }
3612
3613 template <typename _Up, typename _Flags>
3614 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3615 copy_to(_LoadStorePtr<_Up, value_type>* __mem, _IsSimdFlagType<_Flags>) const&&
3616 {
3617 if (_M_k)
3618 __mem[0] = _M_value;
3619 }
3620 };
3621
3622// where_expression<M, T> {{{2
3623template <typename _M, typename _Tp>
3624 class where_expression : public const_where_expression<_M, _Tp>
3625 {
3626 using _Impl = typename const_where_expression<_M, _Tp>::_Impl;
3627
3628 static_assert(!is_const<_Tp>::value,
3629 "where_expression may only be instantiated with __a non-const "
3630 "_Tp parameter");
3631
3632 using typename const_where_expression<_M, _Tp>::value_type;
3633 using const_where_expression<_M, _Tp>::_M_k;
3634 using const_where_expression<_M, _Tp>::_M_value;
3635
3636 static_assert(
3637 is_same<typename _M::abi_type, typename _Tp::abi_type>::value, "");
3638 static_assert(_M::size() == _Tp::size(), "");
3639
3640 _GLIBCXX_SIMD_INTRINSIC friend constexpr _Tp&
3641 __get_lvalue(where_expression& __x)
3642 { return __x._M_value; }
3643
3644 public:
3645 where_expression(const where_expression&) = delete;
3646 where_expression& operator=(const where_expression&) = delete;
3647
3648 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
3649 where_expression(const _M& __kk, _Tp& dd)
3650 : const_where_expression<_M, _Tp>(__kk, dd) {}
3651
3652 template <typename _Up>
3653 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3654 operator=(_Up&& __x) &&
3655 {
3656 _Impl::_S_masked_assign(__data(_M_k), __data(_M_value),
3657 __to_value_type_or_member_type<_Tp>(
3658 static_cast<_Up&&>(__x)));
3659 }
3660
3661#define _GLIBCXX_SIMD_OP_(__op, __name) \
3662 template <typename _Up> \
3663 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void \
3664 operator __op##=(_Up&& __x)&& \
3665 { \
3666 _Impl::template _S_masked_cassign( \
3667 __data(_M_k), __data(_M_value), \
3668 __to_value_type_or_member_type<_Tp>(static_cast<_Up&&>(__x)), \
3669 [](auto __impl, auto __lhs, auto __rhs) \
3670 constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA \
3671 { return __impl.__name(__lhs, __rhs); }); \
3672 } \
3673 static_assert(true)
3674 _GLIBCXX_SIMD_OP_(+, _S_plus);
3675 _GLIBCXX_SIMD_OP_(-, _S_minus);
3676 _GLIBCXX_SIMD_OP_(*, _S_multiplies);
3677 _GLIBCXX_SIMD_OP_(/, _S_divides);
3678 _GLIBCXX_SIMD_OP_(%, _S_modulus);
3679 _GLIBCXX_SIMD_OP_(&, _S_bit_and);
3680 _GLIBCXX_SIMD_OP_(|, _S_bit_or);
3681 _GLIBCXX_SIMD_OP_(^, _S_bit_xor);
3682 _GLIBCXX_SIMD_OP_(<<, _S_shift_left);
3683 _GLIBCXX_SIMD_OP_(>>, _S_shift_right);
3684#undef _GLIBCXX_SIMD_OP_
3685
3686 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3687 operator++() &&
3688 {
3689 __data(_M_value)
3690 = _Impl::template _S_masked_unary<__increment>(__data(_M_k), __data(_M_value));
3691 }
3692
3693 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3694 operator++(int) &&
3695 {
3696 __data(_M_value)
3697 = _Impl::template _S_masked_unary<__increment>(__data(_M_k), __data(_M_value));
3698 }
3699
3700 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3701 operator--() &&
3702 {
3703 __data(_M_value)
3704 = _Impl::template _S_masked_unary<__decrement>(__data(_M_k), __data(_M_value));
3705 }
3706
3707 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3708 operator--(int) &&
3709 {
3710 __data(_M_value)
3711 = _Impl::template _S_masked_unary<__decrement>(__data(_M_k), __data(_M_value));
3712 }
3713
3714 // intentionally hides const_where_expression::copy_from
3715 template <typename _Up, typename _Flags>
3716 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3717 copy_from(const _LoadStorePtr<_Up, value_type>* __mem, _IsSimdFlagType<_Flags>) &&
3718 {
3719 __data(_M_value) = _Impl::_S_masked_load(__data(_M_value), __data(_M_k),
3720 _Flags::template _S_apply<_Tp>(__mem));
3721 }
3722 };
3723
3724// where_expression<bool, T> {{{2
3725template <typename _Tp>
3726 class where_expression<bool, _Tp>
3727 : public const_where_expression<bool, _Tp>
3728 {
3729 using _M = bool;
3730 using typename const_where_expression<_M, _Tp>::value_type;
3731 using const_where_expression<_M, _Tp>::_M_k;
3732 using const_where_expression<_M, _Tp>::_M_value;
3733
3734 public:
3735 where_expression(const where_expression&) = delete;
3736 where_expression& operator=(const where_expression&) = delete;
3737
3738 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
3739 where_expression(const _M& __kk, _Tp& dd)
3740 : const_where_expression<_M, _Tp>(__kk, dd) {}
3741
3742#define _GLIBCXX_SIMD_OP_(__op) \
3743 template <typename _Up> \
3744 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void \
3745 operator __op(_Up&& __x)&& \
3746 { if (_M_k) _M_value __op static_cast<_Up&&>(__x); }
3747
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 _GLIBCXX_SIMD_OP_(<<=)
3758 _GLIBCXX_SIMD_OP_(>>=)
3759 #undef _GLIBCXX_SIMD_OP_
3760
3761 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3762 operator++() &&
3763 { if (_M_k) ++_M_value; }
3764
3765 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3766 operator++(int) &&
3767 { if (_M_k) ++_M_value; }
3768
3769 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3770 operator--() &&
3771 { if (_M_k) --_M_value; }
3772
3773 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3774 operator--(int) &&
3775 { if (_M_k) --_M_value; }
3776
3777 // intentionally hides const_where_expression::copy_from
3778 template <typename _Up, typename _Flags>
3779 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR void
3780 copy_from(const _LoadStorePtr<_Up, value_type>* __mem, _IsSimdFlagType<_Flags>) &&
3781 { if (_M_k) _M_value = __mem[0]; }
3782 };
3783
3784// where {{{1
3785template <typename _Tp, typename _Ap>
3786 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
3787 where_expression<simd_mask<_Tp, _Ap>, simd<_Tp, _Ap>>
3788 where(const typename simd<_Tp, _Ap>::mask_type& __k, simd<_Tp, _Ap>& __value)
3789 { return {__k, __value}; }
3790
3791template <typename _Tp, typename _Ap>
3792 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
3793 const_where_expression<simd_mask<_Tp, _Ap>, simd<_Tp, _Ap>>
3794 where(const typename simd<_Tp, _Ap>::mask_type& __k, const simd<_Tp, _Ap>& __value)
3795 { return {__k, __value}; }
3796
3797template <typename _Tp, typename _Ap>
3798 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
3799 where_expression<simd_mask<_Tp, _Ap>, simd_mask<_Tp, _Ap>>
3800 where(const remove_const_t<simd_mask<_Tp, _Ap>>& __k, simd_mask<_Tp, _Ap>& __value)
3801 { return {__k, __value}; }
3802
3803template <typename _Tp, typename _Ap>
3804 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
3805 const_where_expression<simd_mask<_Tp, _Ap>, simd_mask<_Tp, _Ap>>
3806 where(const remove_const_t<simd_mask<_Tp, _Ap>>& __k, const simd_mask<_Tp, _Ap>& __value)
3807 { return {__k, __value}; }
3808
3809template <typename _Tp>
3810 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR where_expression<bool, _Tp>
3811 where(_ExactBool __k, _Tp& __value)
3812 { return {__k, __value}; }
3813
3814template <typename _Tp>
3815 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR const_where_expression<bool, _Tp>
3816 where(_ExactBool __k, const _Tp& __value)
3817 { return {__k, __value}; }
3818
3819template <typename _Tp, typename _Ap>
3820 _GLIBCXX_SIMD_CONSTEXPR void
3821 where(bool __k, simd<_Tp, _Ap>& __value) = delete;
3822
3823template <typename _Tp, typename _Ap>
3824 _GLIBCXX_SIMD_CONSTEXPR void
3825 where(bool __k, const simd<_Tp, _Ap>& __value) = delete;
3826
3827// proposed mask iterations {{{1
3828namespace __proposed {
3829template <size_t _Np>
3830 class where_range
3831 {
3832 const bitset<_Np> __bits;
3833
3834 public:
3835 where_range(bitset<_Np> __b) : __bits(__b) {}
3836
3837 class iterator
3838 {
3839 size_t __mask;
3840 size_t __bit;
3841
3842 _GLIBCXX_SIMD_INTRINSIC void
3843 __next_bit()
3844 { __bit = __builtin_ctzl(__mask); }
3845
3846 _GLIBCXX_SIMD_INTRINSIC void
3847 __reset_lsb()
3848 {
3849 // 01100100 - 1 = 01100011
3850 __mask &= (__mask - 1);
3851 // __asm__("btr %1,%0" : "+r"(__mask) : "r"(__bit));
3852 }
3853
3854 public:
3855 iterator(decltype(__mask) __m) : __mask(__m) { __next_bit(); }
3856 iterator(const iterator&) = default;
3857 iterator(iterator&&) = default;
3858
3859 _GLIBCXX_SIMD_ALWAYS_INLINE size_t
3860 operator->() const
3861 { return __bit; }
3862
3863 _GLIBCXX_SIMD_ALWAYS_INLINE size_t
3864 operator*() const
3865 { return __bit; }
3866
3867 _GLIBCXX_SIMD_ALWAYS_INLINE iterator&
3868 operator++()
3869 {
3870 __reset_lsb();
3871 __next_bit();
3872 return *this;
3873 }
3874
3875 _GLIBCXX_SIMD_ALWAYS_INLINE iterator
3876 operator++(int)
3877 {
3878 iterator __tmp = *this;
3879 __reset_lsb();
3880 __next_bit();
3881 return __tmp;
3882 }
3883
3884 _GLIBCXX_SIMD_ALWAYS_INLINE bool
3885 operator==(const iterator& __rhs) const
3886 { return __mask == __rhs.__mask; }
3887
3888 _GLIBCXX_SIMD_ALWAYS_INLINE bool
3889 operator!=(const iterator& __rhs) const
3890 { return __mask != __rhs.__mask; }
3891 };
3892
3893 iterator
3894 begin() const
3895 { return __bits.to_ullong(); }
3896
3897 iterator
3898 end() const
3899 { return 0; }
3900 };
3901
3902template <typename _Tp, typename _Ap>
3903 where_range<simd_size_v<_Tp, _Ap>>
3904 where(const simd_mask<_Tp, _Ap>& __k)
3905 { return __k.__to_bitset(); }
3906
3907} // namespace __proposed
3908
3909// }}}1
3910// reductions [simd.reductions] {{{1
3911template <typename _Tp, typename _Abi, typename _BinaryOperation = plus<>>
3912 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR _Tp
3913 reduce(const simd<_Tp, _Abi>& __v, _BinaryOperation __binary_op = _BinaryOperation())
3914 { return _Abi::_SimdImpl::_S_reduce(__v, __binary_op); }
3915
3916template <typename _M, typename _V, typename _BinaryOperation = plus<>>
3917 _GLIBCXX_SIMD_INTRINSIC typename _V::value_type
3918 reduce(const const_where_expression<_M, _V>& __x,
3919 typename _V::value_type __identity_element, _BinaryOperation __binary_op)
3920 {
3921 if (__builtin_expect(none_of(__get_mask(__x)), false))
3922 return __identity_element;
3923
3924 _V __tmp = __identity_element;
3925 _V::_Impl::_S_masked_assign(__data(__get_mask(__x)), __data(__tmp),
3926 __data(__get_lvalue(__x)));
3927 return reduce(__tmp, __binary_op);
3928 }
3929
3930template <typename _M, typename _V>
3931 _GLIBCXX_SIMD_INTRINSIC typename _V::value_type
3932 reduce(const const_where_expression<_M, _V>& __x, plus<> __binary_op = {})
3933 { return reduce(__x, 0, __binary_op); }
3934
3935template <typename _M, typename _V>
3936 _GLIBCXX_SIMD_INTRINSIC typename _V::value_type
3937 reduce(const const_where_expression<_M, _V>& __x, multiplies<> __binary_op)
3938 { return reduce(__x, 1, __binary_op); }
3939
3940template <typename _M, typename _V>
3941 _GLIBCXX_SIMD_INTRINSIC typename _V::value_type
3942 reduce(const const_where_expression<_M, _V>& __x, bit_and<> __binary_op)
3943 { return reduce(__x, ~typename _V::value_type(), __binary_op); }
3944
3945template <typename _M, typename _V>
3946 _GLIBCXX_SIMD_INTRINSIC typename _V::value_type
3947 reduce(const const_where_expression<_M, _V>& __x, bit_or<> __binary_op)
3948 { return reduce(__x, 0, __binary_op); }
3949
3950template <typename _M, typename _V>
3951 _GLIBCXX_SIMD_INTRINSIC typename _V::value_type
3952 reduce(const const_where_expression<_M, _V>& __x, bit_xor<> __binary_op)
3953 { return reduce(__x, 0, __binary_op); }
3954
3955template <typename _Tp, typename _Abi>
3956 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR _Tp
3957 hmin(const simd<_Tp, _Abi>& __v) noexcept
3958 { return _Abi::_SimdImpl::_S_reduce(__v, __detail::_Minimum()); }
3959
3960template <typename _Tp, typename _Abi>
3961 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR _Tp
3962 hmax(const simd<_Tp, _Abi>& __v) noexcept
3963 { return _Abi::_SimdImpl::_S_reduce(__v, __detail::_Maximum()); }
3964
3965template <typename _M, typename _V>
3966 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
3967 typename _V::value_type
3968 hmin(const const_where_expression<_M, _V>& __x) noexcept
3969 {
3970 using _Tp = typename _V::value_type;
3971 constexpr _Tp __id_elem =
3972#ifdef __FINITE_MATH_ONLY__
3973 __finite_max_v<_Tp>;
3974#else
3975 __value_or<__infinity, _Tp>(__finite_max_v<_Tp>);
3976#endif
3977 _V __tmp = __id_elem;
3978 _V::_Impl::_S_masked_assign(__data(__get_mask(__x)), __data(__tmp),
3979 __data(__get_lvalue(__x)));
3980 return _V::abi_type::_SimdImpl::_S_reduce(__tmp, __detail::_Minimum());
3981 }
3982
3983template <typename _M, typename _V>
3984 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
3985 typename _V::value_type
3986 hmax(const const_where_expression<_M, _V>& __x) noexcept
3987 {
3988 using _Tp = typename _V::value_type;
3989 constexpr _Tp __id_elem =
3990#ifdef __FINITE_MATH_ONLY__
3991 __finite_min_v<_Tp>;
3992#else
3993 [] {
3994 if constexpr (__value_exists_v<__infinity, _Tp>)
3995 return -__infinity_v<_Tp>;
3996 else
3997 return __finite_min_v<_Tp>;
3998 }();
3999#endif
4000 _V __tmp = __id_elem;
4001 _V::_Impl::_S_masked_assign(__data(__get_mask(__x)), __data(__tmp),
4002 __data(__get_lvalue(__x)));
4003 return _V::abi_type::_SimdImpl::_S_reduce(__tmp, __detail::_Maximum());
4004 }
4005
4006// }}}1
4007// algorithms [simd.alg] {{{
4008template <typename _Tp, typename _Ap>
4009 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR simd<_Tp, _Ap>
4010 min(const simd<_Tp, _Ap>& __a, const simd<_Tp, _Ap>& __b)
4011 { return {__private_init, _Ap::_SimdImpl::_S_min(__data(__a), __data(__b))}; }
4012
4013template <typename _Tp, typename _Ap>
4014 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR simd<_Tp, _Ap>
4015 max(const simd<_Tp, _Ap>& __a, const simd<_Tp, _Ap>& __b)
4016 { return {__private_init, _Ap::_SimdImpl::_S_max(__data(__a), __data(__b))}; }
4017
4018template <typename _Tp, typename _Ap>
4019 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
4020 pair<simd<_Tp, _Ap>, simd<_Tp, _Ap>>
4021 minmax(const simd<_Tp, _Ap>& __a, const simd<_Tp, _Ap>& __b)
4022 {
4023 const auto pair_of_members
4024 = _Ap::_SimdImpl::_S_minmax(__data(__a), __data(__b));
4025 return {simd<_Tp, _Ap>(__private_init, pair_of_members.first),
4026 simd<_Tp, _Ap>(__private_init, pair_of_members.second)};
4027 }
4028
4029template <typename _Tp, typename _Ap>
4030 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR simd<_Tp, _Ap>
4031 clamp(const simd<_Tp, _Ap>& __v, const simd<_Tp, _Ap>& __lo, const simd<_Tp, _Ap>& __hi)
4032 {
4033 using _Impl = typename _Ap::_SimdImpl;
4034 return {__private_init,
4035 _Impl::_S_min(__data(__hi),
4036 _Impl::_S_max(__data(__lo), __data(__v)))};
4037 }
4038
4039// }}}
4040
4041template <size_t... _Sizes, typename _Tp, typename _Ap,
4042 typename = enable_if_t<((_Sizes + ...) == simd<_Tp, _Ap>::size())>>
4043 inline tuple<simd<_Tp, simd_abi::deduce_t<_Tp, _Sizes>>...>
4044 split(const simd<_Tp, _Ap>&);
4045
4046// __extract_part {{{
4047template <int _Index, int _Total, int _Combine = 1, typename _Tp, size_t _Np>
4048 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_CONST constexpr
4049 conditional_t<_Np == _Total and _Combine == 1, _Tp, _SimdWrapper<_Tp, _Np / _Total * _Combine>>
4050 __extract_part(const _SimdWrapper<_Tp, _Np> __x);
4051
4052template <int _Index, int _Parts, int _Combine = 1, typename _Tp, typename _A0, typename... _As>
4053 _GLIBCXX_SIMD_INTRINSIC constexpr auto
4054 __extract_part(const _SimdTuple<_Tp, _A0, _As...>& __x);
4055
4056// }}}
4057// _SizeList {{{
4058template <size_t _V0, size_t... _Values>
4059 struct _SizeList
4060 {
4061 template <size_t _I>
4062 static constexpr size_t
4063 _S_at(_SizeConstant<_I> = {})
4064 {
4065 if constexpr (_I == 0)
4066 return _V0;
4067 else
4068 return _SizeList<_Values...>::template _S_at<_I - 1>();
4069 }
4070
4071 template <size_t _I>
4072 static constexpr auto
4073 _S_before(_SizeConstant<_I> = {})
4074 {
4075 if constexpr (_I == 0)
4076 return _SizeConstant<0>();
4077 else
4078 return _SizeConstant<
4079 _V0 + _SizeList<_Values...>::template _S_before<_I - 1>()>();
4080 }
4081
4082 template <size_t _Np>
4083 static constexpr auto
4084 _S_pop_front(_SizeConstant<_Np> = {})
4085 {
4086 if constexpr (_Np == 0)
4087 return _SizeList();
4088 else
4089 return _SizeList<_Values...>::template _S_pop_front<_Np - 1>();
4090 }
4091 };
4092
4093// }}}
4094// __extract_center {{{
4095template <typename _Tp, size_t _Np>
4096 _GLIBCXX_SIMD_INTRINSIC _SimdWrapper<_Tp, _Np / 2>
4097 __extract_center(_SimdWrapper<_Tp, _Np> __x)
4098 {
4099 static_assert(_Np >= 4);
4100 static_assert(_Np % 4 == 0); // x0 - x1 - x2 - x3 -> return {x1, x2}
4101#if _GLIBCXX_SIMD_X86INTRIN // {{{
4102 if constexpr (__have_avx512f && sizeof(_Tp) * _Np == 64)
4103 {
4104 const auto __intrin = __to_intrin(__x);
4105 if constexpr (is_integral_v<_Tp>)
4106 return __vector_bitcast<_Tp>(_mm512_castsi512_si256(
4107 _mm512_shuffle_i32x4(__intrin, __intrin,
4108 1 + 2 * 0x4 + 2 * 0x10 + 3 * 0x40)));
4109 else if constexpr (sizeof(_Tp) == 4)
4110 return __vector_bitcast<_Tp>(_mm512_castps512_ps256(
4111 _mm512_shuffle_f32x4(__intrin, __intrin,
4112 1 + 2 * 0x4 + 2 * 0x10 + 3 * 0x40)));
4113 else if constexpr (sizeof(_Tp) == 8)
4114 return __vector_bitcast<_Tp>(_mm512_castpd512_pd256(
4115 _mm512_shuffle_f64x2(__intrin, __intrin,
4116 1 + 2 * 0x4 + 2 * 0x10 + 3 * 0x40)));
4117 else
4118 __assert_unreachable<_Tp>();
4119 }
4120 else if constexpr (sizeof(_Tp) * _Np == 32 && is_floating_point_v<_Tp>)
4121 return __vector_bitcast<_Tp>(
4122 _mm_shuffle_pd(__lo128(__vector_bitcast<double>(__x)),
4123 __hi128(__vector_bitcast<double>(__x)), 1));
4124 else if constexpr (sizeof(__x) == 32 && sizeof(_Tp) * _Np <= 32)
4125 return __vector_bitcast<_Tp>(
4126 _mm_alignr_epi8(__hi128(__vector_bitcast<_LLong>(__x)),
4127 __lo128(__vector_bitcast<_LLong>(__x)),
4128 sizeof(_Tp) * _Np / 4));
4129 else
4130#endif // _GLIBCXX_SIMD_X86INTRIN }}}
4131 {
4132 __vector_type_t<_Tp, _Np / 2> __r;
4133 __builtin_memcpy(&__r,
4134 reinterpret_cast<const char*>(&__x)
4135 + sizeof(_Tp) * _Np / 4,
4136 sizeof(_Tp) * _Np / 2);
4137 return __r;
4138 }
4139 }
4140
4141template <typename _Tp, typename _A0, typename... _As>
4142 _GLIBCXX_SIMD_INTRINSIC
4143 _SimdWrapper<_Tp, _SimdTuple<_Tp, _A0, _As...>::_S_size() / 2>
4144 __extract_center(const _SimdTuple<_Tp, _A0, _As...>& __x)
4145 {
4146 if constexpr (sizeof...(_As) == 0)
4147 return __extract_center(__x.first);
4148 else
4149 return __extract_part<1, 4, 2>(__x);
4150 }
4151
4152// }}}
4153// __split_wrapper {{{
4154template <size_t... _Sizes, typename _Tp, typename... _As>
4155 auto
4156 __split_wrapper(_SizeList<_Sizes...>, const _SimdTuple<_Tp, _As...>& __x)
4157 {
4158 return split<_Sizes...>(
4159 fixed_size_simd<_Tp, _SimdTuple<_Tp, _As...>::_S_size()>(__private_init,
4160 __x));
4161 }
4162
4163// }}}
4164
4165// split<simd>(simd) {{{
4166template <typename _V, typename _Ap,
4167 size_t _Parts = simd_size_v<typename _V::value_type, _Ap> / _V::size()>
4168 enable_if_t<simd_size_v<typename _V::value_type, _Ap> == _Parts * _V::size()
4169 && is_simd_v<_V>, array<_V, _Parts>>
4170 split(const simd<typename _V::value_type, _Ap>& __x)
4171 {
4172 using _Tp = typename _V::value_type;
4173
4174 auto __gen_fallback = [&]() constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4175 return __generate_from_n_evaluations<_Parts, array<_V, _Parts>>(
4176 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4177 return _V([&](auto __j) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA
4178 { return __x[__i * _V::size() + __j]; });
4179 });
4180 };
4181
4182 if constexpr (_Parts == 1)
4183 {
4184 return {simd_cast<_V>(__x)};
4185 }
4186 else if (__x._M_is_constprop())
4187 {
4188 return __gen_fallback();
4189 }
4190#if _GLIBCXX_SIMD_HAVE_SVE
4191 else if constexpr(__is_sve_abi<_Ap>)
4192 {
4193 return __gen_fallback();
4194 }
4195#endif
4196 else if constexpr (
4197 __is_fixed_size_abi_v<_Ap>
4198 && (is_same_v<typename _V::abi_type, simd_abi::scalar>
4199 || (__is_fixed_size_abi_v<typename _V::abi_type>
4200 && sizeof(_V) == sizeof(_Tp) * _V::size() // _V doesn't have padding
4201 )))
4202 {
4203 // fixed_size -> fixed_size (w/o padding) or scalar
4204#ifdef _GLIBCXX_SIMD_USE_ALIASING_LOADS
4205 const __may_alias<_Tp>* const __element_ptr
4206 = reinterpret_cast<const __may_alias<_Tp>*>(&__data(__x));
4207 return __generate_from_n_evaluations<_Parts, array<_V, _Parts>>(
4208 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA
4209 { return _V(__element_ptr + __i * _V::size(), vector_aligned); });
4210#else
4211 const auto& __xx = __data(__x);
4212 return __generate_from_n_evaluations<_Parts, array<_V, _Parts>>(
4213 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4214 [[maybe_unused]] constexpr size_t __offset
4215 = decltype(__i)::value * _V::size();
4216 return _V([&](auto __j) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4217 constexpr _SizeConstant<__j + __offset> __k;
4218 return __xx[__k];
4219 });
4220 });
4221#endif
4222 }
4223 else if constexpr (is_same_v<typename _V::abi_type, simd_abi::scalar>)
4224 {
4225 // normally memcpy should work here as well
4226 return __generate_from_n_evaluations<_Parts, array<_V, _Parts>>(
4227 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA { return __x[__i]; });
4228 }
4229 else
4230 {
4231 return __generate_from_n_evaluations<_Parts, array<_V, _Parts>>(
4232 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4233 if constexpr (__is_fixed_size_abi_v<typename _V::abi_type>)
4234 return _V([&](auto __j) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4235 return __x[__i * _V::size() + __j];
4236 });
4237 else
4238 return _V(__private_init,
4239 __extract_part<decltype(__i)::value, _Parts>(__data(__x)));
4240 });
4241 }
4242 }
4243
4244// }}}
4245// split<simd_mask>(simd_mask) {{{
4246template <typename _V, typename _Ap,
4247 size_t _Parts = simd_size_v<typename _V::simd_type::value_type, _Ap> / _V::size()>
4248 enable_if_t<is_simd_mask_v<_V> && simd_size_v<typename
4249 _V::simd_type::value_type, _Ap> == _Parts * _V::size(), array<_V, _Parts>>
4250 split(const simd_mask<typename _V::simd_type::value_type, _Ap>& __x)
4251 {
4252 if constexpr (is_same_v<_Ap, typename _V::abi_type>)
4253 return {__x};
4254 else if constexpr (_Parts == 1)
4255 return {__proposed::static_simd_cast<_V>(__x)};
4256 else if constexpr (_Parts == 2 && __is_sse_abi<typename _V::abi_type>()
4257 && __is_avx_abi<_Ap>())
4258 return {_V(__private_init, __lo128(__data(__x))),
4259 _V(__private_init, __hi128(__data(__x)))};
4260 else if constexpr (_V::size() <= __CHAR_BIT__ * sizeof(_ULLong))
4261 {
4262 const bitset __bits = __x.__to_bitset();
4263 return __generate_from_n_evaluations<_Parts, array<_V, _Parts>>(
4264 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4265 constexpr size_t __offset = __i * _V::size();
4266 return _V(__bitset_init, (__bits >> __offset).to_ullong());
4267 });
4268 }
4269 else
4270 {
4271 return __generate_from_n_evaluations<_Parts, array<_V, _Parts>>(
4272 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4273 constexpr size_t __offset = __i * _V::size();
4274 return _V(__private_init,
4275 [&](auto __j) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4276 return __x[__j + __offset];
4277 });
4278 });
4279 }
4280 }
4281
4282// }}}
4283// split<_Sizes...>(simd) {{{
4284template <size_t... _Sizes, typename _Tp, typename _Ap, typename>
4285 _GLIBCXX_SIMD_ALWAYS_INLINE
4286 tuple<simd<_Tp, simd_abi::deduce_t<_Tp, _Sizes>>...>
4287 split(const simd<_Tp, _Ap>& __x)
4288 {
4289 using _SL = _SizeList<_Sizes...>;
4290 using _Tuple = tuple<__deduced_simd<_Tp, _Sizes>...>;
4291 constexpr size_t _Np = simd_size_v<_Tp, _Ap>;
4292 constexpr size_t _N0 = _SL::template _S_at<0>();
4293 using _V = __deduced_simd<_Tp, _N0>;
4294
4295 auto __gen_fallback = [&]() constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA
4296 {
4297 return __generate_from_n_evaluations<sizeof...(_Sizes), _Tuple>(
4298 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4299 using _Vi = __deduced_simd<_Tp, _SL::_S_at(__i)>;
4300 constexpr size_t __offset = _SL::_S_before(__i);
4301 return _Vi([&](auto __j) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4302 return __x[__offset + __j];
4303 });
4304 });
4305 };
4306
4307 if (__x._M_is_constprop())
4308 __gen_fallback();
4309#if _GLIBCXX_SIMD_HAVE_SVE
4310 else if constexpr (__have_sve)
4311 __gen_fallback();
4312#endif
4313 else if constexpr (_Np == _N0)
4314 {
4315 static_assert(sizeof...(_Sizes) == 1);
4316 return {simd_cast<_V>(__x)};
4317 }
4318 else if constexpr // split from fixed_size, such that __x::first.size == _N0
4319 (__is_fixed_size_abi_v<
4320 _Ap> && __fixed_size_storage_t<_Tp, _Np>::_S_first_size == _N0)
4321 {
4322 static_assert(
4323 !__is_fixed_size_abi_v<typename _V::abi_type>,
4324 "How can <_Tp, _Np> be __a single _SimdTuple entry but __a "
4325 "fixed_size_simd "
4326 "when deduced?");
4327 // extract first and recurse (__split_wrapper is needed to deduce a new
4328 // _Sizes pack)
4329 return tuple_cat(make_tuple(_V(__private_init, __data(__x).first)),
4330 __split_wrapper(_SL::template _S_pop_front<1>(),
4331 __data(__x).second));
4332 }
4333 else if constexpr ((!__is_fixed_size_abi_v<simd_abi::deduce_t<_Tp, _Sizes>> && ...))
4334 {
4335 constexpr array<size_t, sizeof...(_Sizes)> __size = {_Sizes...};
4336 return __generate_from_n_evaluations<sizeof...(_Sizes), _Tuple>(
4337 [&](auto __i) constexpr {
4338 constexpr size_t __offset = [&]() {
4339 size_t __r = 0;
4340 for (unsigned __j = 0; __j < __i; ++__j)
4341 __r += __size[__j];
4342 return __r;
4343 }();
4344 return __deduced_simd<_Tp, __size[__i]>(
4345 __private_init,
4346 __extract_part<__offset, _Np, __size[__i]>(__data(__x)));
4347 });
4348 }
4349#ifdef _GLIBCXX_SIMD_USE_ALIASING_LOADS
4350 const __may_alias<_Tp>* const __element_ptr
4351 = reinterpret_cast<const __may_alias<_Tp>*>(&__x);
4352 return __generate_from_n_evaluations<sizeof...(_Sizes), _Tuple>(
4353 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4354 using _Vi = __deduced_simd<_Tp, _SL::_S_at(__i)>;
4355 constexpr size_t __offset = _SL::_S_before(__i);
4356 constexpr size_t __base_align = alignof(simd<_Tp, _Ap>);
4357 constexpr size_t __a
4358 = __base_align - ((__offset * sizeof(_Tp)) % __base_align);
4359 constexpr size_t __b = ((__a - 1) & __a) ^ __a;
4360 constexpr size_t __alignment = __b == 0 ? __a : __b;
4361 return _Vi(__element_ptr + __offset, overaligned<__alignment>);
4362 });
4363#else
4364 return __generate_from_n_evaluations<sizeof...(_Sizes), _Tuple>(
4365 [&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4366 using _Vi = __deduced_simd<_Tp, _SL::_S_at(__i)>;
4367 const auto& __xx = __data(__x);
4368 using _Offset = decltype(_SL::_S_before(__i));
4369 return _Vi([&](auto __j) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4370 constexpr _SizeConstant<_Offset::value + __j> __k;
4371 return __xx[__k];
4372 });
4373 });
4374#endif
4375 }
4376
4377// }}}
4378
4379// __subscript_in_pack {{{
4380template <size_t _I, typename _Tp, typename _Ap, typename... _As>
4381 _GLIBCXX_SIMD_INTRINSIC constexpr _Tp
4382 __subscript_in_pack(const simd<_Tp, _Ap>& __x, const simd<_Tp, _As>&... __xs)
4383 {
4384 if constexpr (_I < simd_size_v<_Tp, _Ap>)
4385 return __x[_I];
4386 else
4387 return __subscript_in_pack<_I - simd_size_v<_Tp, _Ap>>(__xs...);
4388 }
4389
4390// }}}
4391// __store_pack_of_simd {{{
4392template <typename _Tp, typename _A0, typename... _As>
4393 _GLIBCXX_SIMD_INTRINSIC void
4394 __store_pack_of_simd(char* __mem, const simd<_Tp, _A0>& __x0, const simd<_Tp, _As>&... __xs)
4395 {
4396 constexpr size_t __n_bytes = sizeof(_Tp) * simd_size_v<_Tp, _A0>;
4397 __builtin_memcpy(__mem, &__data(__x0), __n_bytes);
4398 if constexpr (sizeof...(__xs) > 0)
4399 __store_pack_of_simd(__mem + __n_bytes, __xs...);
4400 }
4401
4402// }}}
4403// concat(simd...) {{{
4404template <typename _Tp, typename... _As, typename = __detail::__odr_helper>
4405 inline _GLIBCXX_SIMD_CONSTEXPR
4406 simd<_Tp, simd_abi::deduce_t<_Tp, (simd_size_v<_Tp, _As> + ...)>>
4407 concat(const simd<_Tp, _As>&... __xs)
4408 {
4409 constexpr int _Np = (simd_size_v<_Tp, _As> + ...);
4410 using _Abi = simd_abi::deduce_t<_Tp, _Np>;
4411 using _Rp = simd<_Tp, _Abi>;
4412 using _RW = typename _SimdTraits<_Tp, _Abi>::_SimdMember;
4413 if constexpr (sizeof...(__xs) == 1)
4414 return simd_cast<_Rp>(__xs...);
4415 else if ((... && __xs._M_is_constprop()))
4416 return _Rp([&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA
4417 { return __subscript_in_pack<__i>(__xs...); });
4418 else if constexpr (__is_simd_wrapper_v<_RW> and sizeof...(__xs) == 2)
4419 {
4420 return {__private_init,
4421 __vec_shuffle(__as_vector(__xs)..., std::make_index_sequence<_RW::_S_full_size>(),
4422 [](int __i) {
4423 constexpr int __sizes[2] = {int(simd_size_v<_Tp, _As>)...};
4424 constexpr int __vsizes[2]
4425 = {int(sizeof(__as_vector(__xs)) / sizeof(_Tp))...};
4426 constexpr int __padding0 = __vsizes[0] - __sizes[0];
4427 return __i >= _Np ? -1 : __i < __sizes[0] ? __i : __i + __padding0;
4428 })};
4429 }
4430 else if constexpr (__is_simd_wrapper_v<_RW> and sizeof...(__xs) == 3)
4431 return [](const auto& __x0, const auto& __x1, const auto& __x2)
4432 _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4433 return concat(concat(__x0, __x1), __x2);
4434 }(__xs...);
4435 else if constexpr (__is_simd_wrapper_v<_RW> and sizeof...(__xs) > 3)
4436 return [](const auto& __x0, const auto& __x1, const auto&... __rest)
4437 _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4438 return concat(concat(__x0, __x1), concat(__rest...));
4439 }(__xs...);
4440 else
4441 {
4442 _Rp __r{};
4443 __store_pack_of_simd(reinterpret_cast<char*>(&__data(__r)), __xs...);
4444 return __r;
4445 }
4446 }
4447
4448// }}}
4449// concat(array<simd>) {{{
4450template <typename _Tp, typename _Abi, size_t _Np>
4451 _GLIBCXX_SIMD_ALWAYS_INLINE
4452 _GLIBCXX_SIMD_CONSTEXPR __deduced_simd<_Tp, simd_size_v<_Tp, _Abi> * _Np>
4453 concat(const array<simd<_Tp, _Abi>, _Np>& __x)
4454 {
4455 return __call_with_subscripts<_Np>(
4456 __x, [](const auto&... __xs) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
4457 return concat(__xs...);
4458 });
4459 }
4460
4461// }}}
4462
4463/// @cond undocumented
4464// _SmartReference {{{
4465template <typename _Up, typename _Accessor = _Up,
4466 typename _ValueType = typename _Up::value_type>
4467 class _SmartReference
4468 {
4469 friend _Accessor;
4470 int _M_index;
4471 _Up& _M_obj;
4472
4473 _GLIBCXX_SIMD_INTRINSIC constexpr _ValueType
4474 _M_read() const noexcept
4475 {
4476 if constexpr (is_arithmetic_v<_Up>)
4477 return _M_obj;
4478 else
4479 return _M_obj[_M_index];
4480 }
4481
4482 template <typename _Tp>
4483 _GLIBCXX_SIMD_INTRINSIC constexpr void
4484 _M_write(_Tp&& __x) const
4485 { _Accessor::_S_set(_M_obj, _M_index, static_cast<_Tp&&>(__x)); }
4486
4487 public:
4488 _GLIBCXX_SIMD_INTRINSIC constexpr
4489 _SmartReference(_Up& __o, int __i) noexcept
4490 : _M_index(__i), _M_obj(__o) {}
4491
4492 using value_type = _ValueType;
4493
4494 _GLIBCXX_SIMD_INTRINSIC
4495 _SmartReference(const _SmartReference&) = delete;
4496
4497 _GLIBCXX_SIMD_INTRINSIC constexpr
4498 operator value_type() const noexcept
4499 { return _M_read(); }
4500
4501 template <typename _Tp, typename = _ValuePreservingOrInt<__remove_cvref_t<_Tp>, value_type>>
4502 _GLIBCXX_SIMD_INTRINSIC constexpr _SmartReference
4503 operator=(_Tp&& __x) &&
4504 {
4505 _M_write(static_cast<_Tp&&>(__x));
4506 return {_M_obj, _M_index};
4507 }
4508
4509#define _GLIBCXX_SIMD_OP_(__op) \
4510 template <typename _Tp, \
4511 typename _TT = decltype(declval<value_type>() __op declval<_Tp>()), \
4512 typename = _ValuePreservingOrInt<__remove_cvref_t<_Tp>, _TT>, \
4513 typename = _ValuePreservingOrInt<_TT, value_type>> \
4514 _GLIBCXX_SIMD_INTRINSIC constexpr _SmartReference \
4515 operator __op##=(_Tp&& __x) && \
4516 { \
4517 const value_type& __lhs = _M_read(); \
4518 _M_write(__lhs __op __x); \
4519 return {_M_obj, _M_index}; \
4520 }
4521 _GLIBCXX_SIMD_ALL_ARITHMETICS(_GLIBCXX_SIMD_OP_);
4522 _GLIBCXX_SIMD_ALL_SHIFTS(_GLIBCXX_SIMD_OP_);
4523 _GLIBCXX_SIMD_ALL_BINARY(_GLIBCXX_SIMD_OP_);
4524#undef _GLIBCXX_SIMD_OP_
4525
4526 template <typename _Tp = void,
4527 typename = decltype(++declval<conditional_t<true, value_type, _Tp>&>())>
4528 _GLIBCXX_SIMD_INTRINSIC constexpr _SmartReference
4529 operator++() &&
4530 {
4531 value_type __x = _M_read();
4532 _M_write(++__x);
4533 return {_M_obj, _M_index};
4534 }
4535
4536 template <typename _Tp = void,
4537 typename = decltype(declval<conditional_t<true, value_type, _Tp>&>()++)>
4538 _GLIBCXX_SIMD_INTRINSIC constexpr value_type
4539 operator++(int) &&
4540 {
4541 const value_type __r = _M_read();
4542 value_type __x = __r;
4543 _M_write(++__x);
4544 return __r;
4545 }
4546
4547 template <typename _Tp = void,
4548 typename = decltype(--declval<conditional_t<true, value_type, _Tp>&>())>
4549 _GLIBCXX_SIMD_INTRINSIC constexpr _SmartReference
4550 operator--() &&
4551 {
4552 value_type __x = _M_read();
4553 _M_write(--__x);
4554 return {_M_obj, _M_index};
4555 }
4556
4557 template <typename _Tp = void,
4558 typename = decltype(declval<conditional_t<true, value_type, _Tp>&>()--)>
4559 _GLIBCXX_SIMD_INTRINSIC constexpr value_type
4560 operator--(int) &&
4561 {
4562 const value_type __r = _M_read();
4563 value_type __x = __r;
4564 _M_write(--__x);
4565 return __r;
4566 }
4567
4568 _GLIBCXX_SIMD_INTRINSIC friend void
4569 swap(_SmartReference&& __a, _SmartReference&& __b) noexcept(
4570 conjunction<
4571 is_nothrow_constructible<value_type, _SmartReference&&>,
4572 is_nothrow_assignable<_SmartReference&&, value_type&&>>::value)
4573 {
4574 value_type __tmp = static_cast<_SmartReference&&>(__a);
4575 static_cast<_SmartReference&&>(__a) = static_cast<value_type>(__b);
4576 static_cast<_SmartReference&&>(__b) = std::move(__tmp);
4577 }
4578
4579 _GLIBCXX_SIMD_INTRINSIC friend void
4580 swap(value_type& __a, _SmartReference&& __b) noexcept(
4581 conjunction<
4582 is_nothrow_constructible<value_type, value_type&&>,
4583 is_nothrow_assignable<value_type&, value_type&&>,
4584 is_nothrow_assignable<_SmartReference&&, value_type&&>>::value)
4585 {
4586 value_type __tmp(std::move(__a));
4587 __a = static_cast<value_type>(__b);
4588 static_cast<_SmartReference&&>(__b) = std::move(__tmp);
4589 }
4590
4591 _GLIBCXX_SIMD_INTRINSIC friend void
4592 swap(_SmartReference&& __a, value_type& __b) noexcept(
4593 conjunction<
4594 is_nothrow_constructible<value_type, _SmartReference&&>,
4595 is_nothrow_assignable<value_type&, value_type&&>,
4596 is_nothrow_assignable<_SmartReference&&, value_type&&>>::value)
4597 {
4598 value_type __tmp(__a);
4599 static_cast<_SmartReference&&>(__a) = std::move(__b);
4600 __b = std::move(__tmp);
4601 }
4602 };
4603
4604// }}}
4605// __scalar_abi_wrapper {{{
4606template <int _Bytes>
4607 struct __scalar_abi_wrapper
4608 {
4609 template <typename _Tp> static constexpr size_t _S_full_size = 1;
4610 template <typename _Tp> static constexpr size_t _S_size = 1;
4611 template <typename _Tp> static constexpr size_t _S_is_partial = false;
4612
4613 template <typename _Tp, typename _Abi = simd_abi::scalar>
4614 static constexpr bool _S_is_valid_v
4615 = _Abi::template _IsValid<_Tp>::value && sizeof(_Tp) == _Bytes;
4616 };
4617
4618// }}}
4619// __decay_abi metafunction {{{
4620template <typename _Tp>
4621 struct __decay_abi { using type = _Tp; };
4622
4623template <int _Bytes>
4624 struct __decay_abi<__scalar_abi_wrapper<_Bytes>>
4625 { using type = simd_abi::scalar; };
4626
4627// }}}
4628// __find_next_valid_abi metafunction {{{1
4629// Given an ABI tag A<N>, find an N2 < N such that A<N2>::_S_is_valid_v<_Tp> ==
4630// true, N2 is a power-of-2, and A<N2>::_S_is_partial<_Tp> is false. Break
4631// recursion at 2 elements in the resulting ABI tag. In this case
4632// type::_S_is_valid_v<_Tp> may be false.
4633template <template <int> class _Abi, int _Bytes, typename _Tp>
4634 struct __find_next_valid_abi
4635 {
4636 static constexpr auto
4637 _S_choose()
4638 {
4639 constexpr int _NextBytes = std::__bit_ceil((unsigned)_Bytes) / 2;
4640 using _NextAbi = _Abi<_NextBytes>;
4641 if constexpr (_NextBytes < sizeof(_Tp) * 2) // break recursion
4642 return _Abi<_Bytes>();
4643 else if constexpr (_NextAbi::template _S_is_partial<_Tp> == false
4644 && _NextAbi::template _S_is_valid_v<_Tp>)
4645 return _NextAbi();
4646 else
4647 return __find_next_valid_abi<_Abi, _NextBytes, _Tp>::_S_choose();
4648 }
4649
4650 using type = decltype(_S_choose());
4651 };
4652
4653template <int _Bytes, typename _Tp>
4654 struct __find_next_valid_abi<__scalar_abi_wrapper, _Bytes, _Tp>
4655 { using type = simd_abi::scalar; };
4656
4657// _AbiList {{{1
4658template <template <int> class...>
4659 struct _AbiList
4660 {
4661 template <typename, int> static constexpr bool _S_has_valid_abi = false;
4662 template <typename, int> using _FirstValidAbi = void;
4663 template <typename, int> using _BestAbi = void;
4664 };
4665
4666template <template <int> class _A0, template <int> class... _Rest>
4667 struct _AbiList<_A0, _Rest...>
4668 {
4669 template <typename _Tp, int _Np>
4670 static constexpr bool _S_has_valid_abi
4671 = _A0<sizeof(_Tp) * _Np>::template _S_is_valid_v<
4672 _Tp> || _AbiList<_Rest...>::template _S_has_valid_abi<_Tp, _Np>;
4673
4674 template <typename _Tp, int _Np>
4675 using _FirstValidAbi = conditional_t<
4676 _A0<sizeof(_Tp) * _Np>::template _S_is_valid_v<_Tp>,
4677 typename __decay_abi<_A0<sizeof(_Tp) * _Np>>::type,
4678 typename _AbiList<_Rest...>::template _FirstValidAbi<_Tp, _Np>>;
4679
4680 template <typename _Tp, int _Np>
4681 static constexpr auto
4682 _S_determine_best_abi()
4683 {
4684 static_assert(_Np >= 1);
4685 constexpr int _Bytes = sizeof(_Tp) * _Np;
4686 if constexpr (_Np == 1)
4687 return __make_dependent_t<_Tp, simd_abi::scalar>{};
4688 else
4689 {
4690 constexpr int __fullsize = _A0<_Bytes>::template _S_full_size<_Tp>;
4691 // _A0<_Bytes> is good if:
4692 // 1. The ABI tag is valid for _Tp
4693 // 2. The storage overhead is no more than padding to fill the next
4694 // power-of-2 number of bytes
4695 if constexpr (_A0<_Bytes>::template _S_is_valid_v<_Tp>
4696 && ((__is_sve_abi<_A0<_Bytes>>() && __have_sve
4697 && (_Np <= __sve_vectorized_size_bytes/sizeof(_Tp)))
4698 || (__fullsize / 2 < _Np))
4699 )
4700 return typename __decay_abi<_A0<_Bytes>>::type{};
4701 else
4702 {
4703 using _Bp =
4704 typename __find_next_valid_abi<_A0, _Bytes, _Tp>::type;
4705 if constexpr (_Bp::template _S_is_valid_v<
4706 _Tp> && _Bp::template _S_size<_Tp> <= _Np)
4707 return _Bp{};
4708 else
4709 return
4710 typename _AbiList<_Rest...>::template _BestAbi<_Tp, _Np>{};
4711 }
4712 }
4713 }
4714
4715 template <typename _Tp, int _Np>
4716 using _BestAbi = decltype(_S_determine_best_abi<_Tp, _Np>());
4717 };
4718
4719// }}}1
4720
4721// the following lists all native ABIs, which makes them accessible to
4722// simd_abi::deduce and select_best_vector_type_t (for fixed_size). Order
4723// matters: Whatever comes first has higher priority.
4724using _AllNativeAbis = _AbiList<
4725#if _GLIBCXX_SIMD_HAVE_SVE
4726 simd_abi::_SveAbi,
4727#endif
4728 simd_abi::_VecBltnBtmsk, simd_abi::_VecBuiltin, __scalar_abi_wrapper>;
4729
4730using _NoSveAllNativeAbis = _AbiList<simd_abi::_VecBltnBtmsk, simd_abi::_VecBuiltin,
4731 __scalar_abi_wrapper>;
4732
4733// valid _SimdTraits specialization {{{1
4734template <typename _Tp, typename _Abi>
4735 struct _SimdTraits<_Tp, _Abi, void_t<typename _Abi::template _IsValid<_Tp>>>
4736 : _Abi::template __traits<_Tp> {};
4737
4738// __deduce_impl specializations {{{1
4739// try all native ABIs (including scalar) first
4740template <typename _Tp, size_t _Np>
4741 struct __deduce_impl<
4742 _Tp, _Np, enable_if_t<_AllNativeAbis::template _S_has_valid_abi<_Tp, _Np>>>
4743 { using type = _AllNativeAbis::_FirstValidAbi<_Tp, _Np>; };
4744
4745template <typename _Tp, size_t _Np>
4746 struct __no_sve_deduce_impl<
4747 _Tp, _Np, enable_if_t<_NoSveAllNativeAbis::template _S_has_valid_abi<_Tp, _Np>>>
4748 { using type = _NoSveAllNativeAbis::_FirstValidAbi<_Tp, _Np>; };
4749
4750// fall back to fixed_size only if scalar and native ABIs don't match
4751template <typename _Tp, size_t _Np, typename = void>
4752 struct __deduce_fixed_size_fallback {};
4753
4754template <typename _Tp, size_t _Np>
4755 struct __deduce_fixed_size_fallback<_Tp, _Np,
4756 enable_if_t<simd_abi::fixed_size<_Np>::template _S_is_valid_v<_Tp>>>
4757 { using type = simd_abi::fixed_size<_Np>; };
4758
4759template <typename _Tp, size_t _Np, typename>
4760 struct __deduce_impl : public __deduce_fixed_size_fallback<_Tp, _Np> {};
4761
4762template <typename _Tp, size_t _Np, typename>
4763 struct __no_sve_deduce_impl
4764 : public __deduce_fixed_size_fallback<_Tp, _Np>
4765 {};
4766
4767
4768//}}}1
4769/// @endcond
4770
4771// simd_mask {{{
4772template <typename _Tp, typename _Abi>
4773 class simd_mask : public _SimdTraits<_Tp, _Abi>::_MaskBase
4774 {
4775 // types, tags, and friends {{{
4776 using _Traits = _SimdTraits<_Tp, _Abi>;
4777 using _MemberType = typename _Traits::_MaskMember;
4778
4779 // We map all masks with equal element sizeof to a single integer type, the
4780 // one given by __int_for_sizeof_t<_Tp>. This is the approach
4781 // [[gnu::vector_size(N)]] types take as well and it reduces the number of
4782 // template specializations in the implementation classes.
4783 using _Ip = __int_for_sizeof_t<_Tp>;
4784 static constexpr _Ip* _S_type_tag = nullptr;
4785
4786 friend typename _Traits::_MaskBase;
4787 friend class simd<_Tp, _Abi>; // to construct masks on return
4788 friend typename _Traits::_SimdImpl; // to construct masks on return and
4789 // inspect data on masked operations
4790 public:
4791 using _Impl = typename _Traits::_MaskImpl;
4792 friend _Impl;
4793
4794 // }}}
4795 // member types {{{
4796 using value_type = bool;
4797 using reference = _SmartReference<_MemberType, _Impl, value_type>;
4798 using simd_type = simd<_Tp, _Abi>;
4799 using abi_type = _Abi;
4800
4801 // }}}
4802 static constexpr size_t size() // {{{
4803 { return __size_or_zero_v<_Tp, _Abi>; }
4804
4805 // }}}
4806 // constructors & assignment {{{
4807 simd_mask() = default;
4808 simd_mask(const simd_mask&) = default;
4809 simd_mask(simd_mask&&) = default;
4810 simd_mask& operator=(const simd_mask&) = default;
4811 simd_mask& operator=(simd_mask&&) = default;
4812
4813 // }}}
4814 // access to internal representation (optional feature) {{{
4815 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR explicit
4816 simd_mask(typename _Traits::_MaskCastType __init)
4817 : _M_data{__init} {}
4818 // conversions to internal type is done in _MaskBase
4819
4820 // }}}
4821 // bitset interface (extension to be proposed) {{{
4822 // TS_FEEDBACK:
4823 // Conversion of simd_mask to and from bitset makes it much easier to
4824 // interface with other facilities. I suggest adding `static
4825 // simd_mask::from_bitset` and `simd_mask::to_bitset`.
4826 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR static simd_mask
4827 __from_bitset(bitset<size()> bs)
4828 { return {__bitset_init, bs}; }
4829
4830 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR bitset<size()>
4831 __to_bitset() const
4832 { return _Impl::_S_to_bits(_M_data)._M_to_bitset(); }
4833
4834 // }}}
4835 // explicit broadcast constructor {{{
4836 _GLIBCXX_SIMD_ALWAYS_INLINE explicit _GLIBCXX_SIMD_CONSTEXPR
4837 simd_mask(value_type __x)
4838 : _M_data(_Impl::template _S_broadcast<_Ip>(__x)) {}
4839
4840 // }}}
4841 // implicit type conversion constructor {{{
4842 #ifdef _GLIBCXX_SIMD_ENABLE_IMPLICIT_MASK_CAST
4843 // proposed improvement
4844 template <typename _Up, typename _A2,
4845 typename = enable_if_t<simd_size_v<_Up, _A2> == size()>>
4846 _GLIBCXX_SIMD_ALWAYS_INLINE explicit(sizeof(_MemberType)
4847 != sizeof(typename _SimdTraits<_Up, _A2>::_MaskMember))
4848 simd_mask(const simd_mask<_Up, _A2>& __x)
4849 : simd_mask(__proposed::static_simd_cast<simd_mask>(__x)) {}
4850 #else
4851 // conforming to ISO/IEC 19570:2018
4852 template <typename _Up, typename = enable_if_t<conjunction<
4853 is_same<abi_type, simd_abi::fixed_size<size()>>,
4854 is_same<_Up, _Up>>::value>>
4855 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR
4856 simd_mask(const simd_mask<_Up, simd_abi::fixed_size<size()>>& __x)
4857 : _M_data(_Impl::_S_from_bitmask(__data(__x), _S_type_tag)) {}
4858 #endif
4859
4860 // }}}
4861 // load constructor {{{
4862 template <typename _Flags>
4863 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR
4864 simd_mask(const value_type* __mem, _IsSimdFlagType<_Flags>)
4865 : _M_data(_Impl::template _S_load<_Ip>(_Flags::template _S_apply<simd_mask>(__mem))) {}
4866
4867 template <typename _Flags>
4868 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR
4869 simd_mask(const value_type* __mem, simd_mask __k, _IsSimdFlagType<_Flags>)
4870 : _M_data{}
4871 {
4872 _M_data = _Impl::_S_masked_load(_M_data, __k._M_data,
4873 _Flags::template _S_apply<simd_mask>(__mem));
4874 }
4875
4876 // }}}
4877 // loads [simd_mask.load] {{{
4878 template <typename _Flags>
4879 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR void
4880 copy_from(const value_type* __mem, _IsSimdFlagType<_Flags>)
4881 { _M_data = _Impl::template _S_load<_Ip>(_Flags::template _S_apply<simd_mask>(__mem)); }
4882
4883 // }}}
4884 // stores [simd_mask.store] {{{
4885 template <typename _Flags>
4886 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR void
4887 copy_to(value_type* __mem, _IsSimdFlagType<_Flags>) const
4888 { _Impl::_S_store(_M_data, _Flags::template _S_apply<simd_mask>(__mem)); }
4889
4890 // }}}
4891 // scalar access {{{
4892 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR reference
4893 operator[](size_t __i)
4894 {
4895 if (__i >= size())
4896 __invoke_ub("Subscript %d is out of range [0, %d]", __i, size() - 1);
4897 return {_M_data, int(__i)};
4898 }
4899
4900 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR value_type
4901 operator[](size_t __i) const
4902 {
4903 if (__i >= size())
4904 __invoke_ub("Subscript %d is out of range [0, %d]", __i, size() - 1);
4905 if constexpr (__is_scalar_abi<_Abi>())
4906 return _M_data;
4907 else
4908 return static_cast<bool>(_M_data[__i]);
4909 }
4910
4911 // }}}
4912 // negation {{{
4913 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR simd_mask
4914 operator!() const
4915 { return {__private_init, _Impl::_S_bit_not(_M_data)}; }
4916
4917 // }}}
4918 // simd_mask binary operators [simd_mask.binary] {{{
4919 #ifdef _GLIBCXX_SIMD_ENABLE_IMPLICIT_MASK_CAST
4920 // simd_mask<int> && simd_mask<uint> needs disambiguation
4921 template <typename _Up, typename _A2,
4922 typename = enable_if_t<is_convertible_v<simd_mask<_Up, _A2>, simd_mask>>>
4923 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask
4924 operator&&(const simd_mask& __x, const simd_mask<_Up, _A2>& __y)
4925 {
4926 return {__private_init,
4927 _Impl::_S_logical_and(__x._M_data, simd_mask(__y)._M_data)};
4928 }
4929
4930 template <typename _Up, typename _A2,
4931 typename = enable_if_t<is_convertible_v<simd_mask<_Up, _A2>, simd_mask>>>
4932 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask
4933 operator||(const simd_mask& __x, const simd_mask<_Up, _A2>& __y)
4934 {
4935 return {__private_init,
4936 _Impl::_S_logical_or(__x._M_data, simd_mask(__y)._M_data)};
4937 }
4938 #endif // _GLIBCXX_SIMD_ENABLE_IMPLICIT_MASK_CAST
4939
4940 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask
4941 operator&&(const simd_mask& __x, const simd_mask& __y)
4942 { return {__private_init, _Impl::_S_logical_and(__x._M_data, __y._M_data)}; }
4943
4944 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask
4945 operator||(const simd_mask& __x, const simd_mask& __y)
4946 { return {__private_init, _Impl::_S_logical_or(__x._M_data, __y._M_data)}; }
4947
4948 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask
4949 operator&(const simd_mask& __x, const simd_mask& __y)
4950 { return {__private_init, _Impl::_S_bit_and(__x._M_data, __y._M_data)}; }
4951
4952 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask
4953 operator|(const simd_mask& __x, const simd_mask& __y)
4954 { return {__private_init, _Impl::_S_bit_or(__x._M_data, __y._M_data)}; }
4955
4956 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask
4957 operator^(const simd_mask& __x, const simd_mask& __y)
4958 { return {__private_init, _Impl::_S_bit_xor(__x._M_data, __y._M_data)}; }
4959
4960 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask&
4961 operator&=(simd_mask& __x, const simd_mask& __y)
4962 {
4963 __x._M_data = _Impl::_S_bit_and(__x._M_data, __y._M_data);
4964 return __x;
4965 }
4966
4967 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask&
4968 operator|=(simd_mask& __x, const simd_mask& __y)
4969 {
4970 __x._M_data = _Impl::_S_bit_or(__x._M_data, __y._M_data);
4971 return __x;
4972 }
4973
4974 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask&
4975 operator^=(simd_mask& __x, const simd_mask& __y)
4976 {
4977 __x._M_data = _Impl::_S_bit_xor(__x._M_data, __y._M_data);
4978 return __x;
4979 }
4980
4981 // }}}
4982 // simd_mask compares [simd_mask.comparison] {{{
4983 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask
4984 operator==(const simd_mask& __x, const simd_mask& __y)
4985 { return !operator!=(__x, __y); }
4986
4987 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask
4988 operator!=(const simd_mask& __x, const simd_mask& __y)
4989 { return {__private_init, _Impl::_S_bit_xor(__x._M_data, __y._M_data)}; }
4990
4991 // }}}
4992 // private_init ctor {{{
4993 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
4994 simd_mask(_PrivateInit, typename _Traits::_MaskMember __init)
4995 : _M_data(__init) {}
4996
4997 // }}}
4998 // private_init generator ctor {{{
4999 template <typename _Fp, typename = decltype(bool(declval<_Fp>()(size_t())))>
5000 _GLIBCXX_SIMD_INTRINSIC constexpr
5001 simd_mask(_PrivateInit, _Fp&& __gen)
5002 : _M_data()
5003 {
5004 __execute_n_times<size()>([&](auto __i) constexpr _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
5005 _Impl::_S_set(_M_data, __i, __gen(__i));
5006 });
5007 }
5008
5009 // }}}
5010 // bitset_init ctor {{{
5011 _GLIBCXX_SIMD_INTRINSIC constexpr
5012 simd_mask(_BitsetInit, bitset<size()> __init)
5013 : _M_data(_Impl::_S_from_bitmask(_SanitizedBitMask<size()>(__init), _S_type_tag))
5014 {}
5015
5016 // }}}
5017 // __cvt {{{
5018 // TS_FEEDBACK:
5019 // The conversion operator this implements should be a ctor on simd_mask.
5020 // Once you call .__cvt() on a simd_mask it converts conveniently.
5021 // A useful variation: add `explicit(sizeof(_Tp) != sizeof(_Up))`
5022 struct _CvtProxy
5023 {
5024 template <typename _Up, typename _A2,
5025 typename = enable_if_t<simd_size_v<_Up, _A2> == simd_size_v<_Tp, _Abi>>>
5026 _GLIBCXX_SIMD_ALWAYS_INLINE
5027 operator simd_mask<_Up, _A2>() &&
5028 {
5029 using namespace std::experimental::__proposed;
5030 return static_simd_cast<simd_mask<_Up, _A2>>(_M_data);
5031 }
5032
5033 const simd_mask<_Tp, _Abi>& _M_data;
5034 };
5035
5036 _GLIBCXX_SIMD_INTRINSIC _CvtProxy
5037 __cvt() const
5038 { return {*this}; }
5039
5040 // }}}
5041 // operator?: overloads (suggested extension) {{{
5042 #ifdef __GXX_CONDITIONAL_IS_OVERLOADABLE__
5043 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask
5044 operator?:(const simd_mask& __k, const simd_mask& __where_true,
5045 const simd_mask& __where_false)
5046 {
5047 auto __ret = __where_false;
5048 _Impl::_S_masked_assign(__k._M_data, __ret._M_data, __where_true._M_data);
5049 return __ret;
5050 }
5051
5052 template <typename _U1, typename _U2,
5053 typename _Rp = simd<common_type_t<_U1, _U2>, _Abi>,
5054 typename = enable_if_t<conjunction_v<
5055 is_convertible<_U1, _Rp>, is_convertible<_U2, _Rp>,
5056 is_convertible<simd_mask, typename _Rp::mask_type>>>>
5057 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend _Rp
5058 operator?:(const simd_mask& __k, const _U1& __where_true,
5059 const _U2& __where_false)
5060 {
5061 _Rp __ret = __where_false;
5062 _Rp::_Impl::_S_masked_assign(
5063 __data(static_cast<typename _Rp::mask_type>(__k)), __data(__ret),
5064 __data(static_cast<_Rp>(__where_true)));
5065 return __ret;
5066 }
5067
5068 #ifdef _GLIBCXX_SIMD_ENABLE_IMPLICIT_MASK_CAST
5069 template <typename _Kp, typename _Ak, typename _Up, typename _Au,
5070 typename = enable_if_t<
5071 conjunction_v<is_convertible<simd_mask<_Kp, _Ak>, simd_mask>,
5072 is_convertible<simd_mask<_Up, _Au>, simd_mask>>>>
5073 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd_mask
5074 operator?:(const simd_mask<_Kp, _Ak>& __k, const simd_mask& __where_true,
5075 const simd_mask<_Up, _Au>& __where_false)
5076 {
5077 simd_mask __ret = __where_false;
5078 _Impl::_S_masked_assign(simd_mask(__k)._M_data, __ret._M_data,
5079 __where_true._M_data);
5080 return __ret;
5081 }
5082 #endif // _GLIBCXX_SIMD_ENABLE_IMPLICIT_MASK_CAST
5083 #endif // __GXX_CONDITIONAL_IS_OVERLOADABLE__
5084
5085 // }}}
5086 // _M_is_constprop {{{
5087 _GLIBCXX_SIMD_INTRINSIC constexpr bool
5088 _M_is_constprop() const
5089 {
5090 if constexpr (__is_scalar_abi<_Abi>())
5091 return __builtin_constant_p(_M_data);
5092 else
5093 return _M_data._M_is_constprop();
5094 }
5095
5096 // }}}
5097
5098 private:
5099 friend const auto& __data<_Tp, abi_type>(const simd_mask&);
5100 friend auto& __data<_Tp, abi_type>(simd_mask&);
5101 alignas(_Traits::_S_mask_align) _MemberType _M_data;
5102 };
5103
5104// }}}
5105
5106/// @cond undocumented
5107// __data(simd_mask) {{{
5108template <typename _Tp, typename _Ap>
5109 _GLIBCXX_SIMD_INTRINSIC constexpr const auto&
5110 __data(const simd_mask<_Tp, _Ap>& __x)
5111 { return __x._M_data; }
5112
5113template <typename _Tp, typename _Ap>
5114 _GLIBCXX_SIMD_INTRINSIC constexpr auto&
5115 __data(simd_mask<_Tp, _Ap>& __x)
5116 { return __x._M_data; }
5117
5118// }}}
5119/// @endcond
5120
5121// simd_mask reductions [simd_mask.reductions] {{{
5122template <typename _Tp, typename _Abi>
5123 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR bool
5124 all_of(const simd_mask<_Tp, _Abi>& __k) noexcept
5125 {
5126 if (__builtin_is_constant_evaluated() || __k._M_is_constprop())
5127 {
5128 for (size_t __i = 0; __i < simd_size_v<_Tp, _Abi>; ++__i)
5129 if (!__k[__i])
5130 return false;
5131 return true;
5132 }
5133 else
5134 return _Abi::_MaskImpl::_S_all_of(__k);
5135 }
5136
5137template <typename _Tp, typename _Abi>
5138 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR bool
5139 any_of(const simd_mask<_Tp, _Abi>& __k) noexcept
5140 {
5141 if (__builtin_is_constant_evaluated() || __k._M_is_constprop())
5142 {
5143 for (size_t __i = 0; __i < simd_size_v<_Tp, _Abi>; ++__i)
5144 if (__k[__i])
5145 return true;
5146 return false;
5147 }
5148 else
5149 return _Abi::_MaskImpl::_S_any_of(__k);
5150 }
5151
5152template <typename _Tp, typename _Abi>
5153 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR bool
5154 none_of(const simd_mask<_Tp, _Abi>& __k) noexcept
5155 {
5156 if (__builtin_is_constant_evaluated() || __k._M_is_constprop())
5157 {
5158 for (size_t __i = 0; __i < simd_size_v<_Tp, _Abi>; ++__i)
5159 if (__k[__i])
5160 return false;
5161 return true;
5162 }
5163 else
5164 return _Abi::_MaskImpl::_S_none_of(__k);
5165 }
5166
5167template <typename _Tp, typename _Abi>
5168 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR bool
5169 some_of(const simd_mask<_Tp, _Abi>& __k) noexcept
5170 {
5171 if (__builtin_is_constant_evaluated() || __k._M_is_constprop())
5172 {
5173 for (size_t __i = 1; __i < simd_size_v<_Tp, _Abi>; ++__i)
5174 if (__k[__i] != __k[__i - 1])
5175 return true;
5176 return false;
5177 }
5178 else
5179 return _Abi::_MaskImpl::_S_some_of(__k);
5180 }
5181
5182template <typename _Tp, typename _Abi>
5183 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR int
5184 popcount(const simd_mask<_Tp, _Abi>& __k) noexcept
5185 {
5186 if (__builtin_is_constant_evaluated() || __k._M_is_constprop())
5187 {
5188 const int __r = __call_with_subscripts<simd_size_v<_Tp, _Abi>>(
5189 __k, [](auto... __elements) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
5190 return ((__elements != 0) + ...);
5191 });
5192 if (__builtin_is_constant_evaluated() || __builtin_constant_p(__r))
5193 return __r;
5194 }
5195 return _Abi::_MaskImpl::_S_popcount(__k);
5196 }
5197
5198template <typename _Tp, typename _Abi>
5199 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR int
5200 find_first_set(const simd_mask<_Tp, _Abi>& __k)
5201 {
5202 if (__builtin_is_constant_evaluated() || __k._M_is_constprop())
5203 {
5204 constexpr size_t _Np = simd_size_v<_Tp, _Abi>;
5205 const size_t _Idx = __call_with_n_evaluations<_Np>(
5206 [](auto... __indexes) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
5207 return std::min({__indexes...});
5208 }, [&](auto __i) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
5209 return __k[__i] ? +__i : _Np;
5210 });
5211 if (_Idx >= _Np)
5212 __invoke_ub("find_first_set(empty mask) is UB");
5213 if (__builtin_constant_p(_Idx))
5214 return _Idx;
5215 }
5216 return _Abi::_MaskImpl::_S_find_first_set(__k);
5217 }
5218
5219template <typename _Tp, typename _Abi>
5220 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR int
5221 find_last_set(const simd_mask<_Tp, _Abi>& __k)
5222 {
5223 if (__builtin_is_constant_evaluated() || __k._M_is_constprop())
5224 {
5225 constexpr size_t _Np = simd_size_v<_Tp, _Abi>;
5226 const int _Idx = __call_with_n_evaluations<_Np>(
5227 [](auto... __indexes) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
5228 return std::max({__indexes...});
5229 }, [&](auto __i) _GLIBCXX_SIMD_ALWAYS_INLINE_LAMBDA {
5230 return __k[__i] ? int(__i) : -1;
5231 });
5232 if (_Idx < 0)
5233 __invoke_ub("find_first_set(empty mask) is UB");
5234 if (__builtin_constant_p(_Idx))
5235 return _Idx;
5236 }
5237 return _Abi::_MaskImpl::_S_find_last_set(__k);
5238 }
5239
5240_GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR bool
5241all_of(_ExactBool __x) noexcept
5242{ return __x; }
5243
5244_GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR bool
5245any_of(_ExactBool __x) noexcept
5246{ return __x; }
5247
5248_GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR bool
5249none_of(_ExactBool __x) noexcept
5250{ return !__x; }
5251
5252_GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR bool
5253some_of(_ExactBool) noexcept
5254{ return false; }
5255
5256_GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR int
5257popcount(_ExactBool __x) noexcept
5258{ return __x; }
5259
5260_GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR int
5261find_first_set(_ExactBool)
5262{ return 0; }
5263
5264_GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR int
5265find_last_set(_ExactBool)
5266{ return 0; }
5267
5268// }}}
5269
5270/// @cond undocumented
5271// _SimdIntOperators{{{1
5272template <typename _V, typename _Tp, typename _Abi, bool>
5273 class _SimdIntOperators {};
5274
5275template <typename _V, typename _Tp, typename _Abi>
5276 class _SimdIntOperators<_V, _Tp, _Abi, true>
5277 {
5278 using _Impl = typename _SimdTraits<_Tp, _Abi>::_SimdImpl;
5279
5280 _GLIBCXX_SIMD_INTRINSIC constexpr const _V&
5281 __derived() const
5282 { return *static_cast<const _V*>(this); }
5283
5284 template <typename _Up>
5285 _GLIBCXX_SIMD_INTRINSIC static _GLIBCXX_SIMD_CONSTEXPR _V
5286 _S_make_derived(_Up&& __d)
5287 { return {__private_init, static_cast<_Up&&>(__d)}; }
5288
5289 public:
5290 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5291 _V&
5292 operator%=(_V& __lhs, const _V& __x)
5293 { return __lhs = __lhs % __x; }
5294
5295 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5296 _V&
5297 operator&=(_V& __lhs, const _V& __x)
5298 { return __lhs = __lhs & __x; }
5299
5300 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5301 _V&
5302 operator|=(_V& __lhs, const _V& __x)
5303 { return __lhs = __lhs | __x; }
5304
5305 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5306 _V&
5307 operator^=(_V& __lhs, const _V& __x)
5308 { return __lhs = __lhs ^ __x; }
5309
5310 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5311 _V&
5312 operator<<=(_V& __lhs, const _V& __x)
5313 { return __lhs = __lhs << __x; }
5314
5315 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5316 _V&
5317 operator>>=(_V& __lhs, const _V& __x)
5318 { return __lhs = __lhs >> __x; }
5319
5320 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5321 _V&
5322 operator<<=(_V& __lhs, int __x)
5323 { return __lhs = __lhs << __x; }
5324
5325 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5326 _V&
5327 operator>>=(_V& __lhs, int __x)
5328 { return __lhs = __lhs >> __x; }
5329
5330 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5331 _V
5332 operator%(const _V& __x, const _V& __y)
5333 {
5334 return _SimdIntOperators::_S_make_derived(
5335 _Impl::_S_modulus(__data(__x), __data(__y)));
5336 }
5337
5338 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5339 _V
5340 operator&(const _V& __x, const _V& __y)
5341 {
5342 return _SimdIntOperators::_S_make_derived(
5343 _Impl::_S_bit_and(__data(__x), __data(__y)));
5344 }
5345
5346 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5347 _V
5348 operator|(const _V& __x, const _V& __y)
5349 {
5350 return _SimdIntOperators::_S_make_derived(
5351 _Impl::_S_bit_or(__data(__x), __data(__y)));
5352 }
5353
5354 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5355 _V
5356 operator^(const _V& __x, const _V& __y)
5357 {
5358 return _SimdIntOperators::_S_make_derived(
5359 _Impl::_S_bit_xor(__data(__x), __data(__y)));
5360 }
5361
5362 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5363 _V
5364 operator<<(const _V& __x, const _V& __y)
5365 {
5366 return _SimdIntOperators::_S_make_derived(
5367 _Impl::_S_bit_shift_left(__data(__x), __data(__y)));
5368 }
5369
5370 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5371 _V
5372 operator>>(const _V& __x, const _V& __y)
5373 {
5374 return _SimdIntOperators::_S_make_derived(
5375 _Impl::_S_bit_shift_right(__data(__x), __data(__y)));
5376 }
5377
5378 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5379 _V
5380 operator<<(const _V& __x, int __y)
5381 {
5382 if (__y < 0)
5383 __invoke_ub("The behavior is undefined if the right operand of a "
5384 "shift operation is negative. [expr.shift]\nA shift by "
5385 "%d was requested",
5386 __y);
5387 if (size_t(__y) >= sizeof(declval<_Tp>() << __y) * __CHAR_BIT__)
5388 __invoke_ub(
5389 "The behavior is undefined if the right operand of a "
5390 "shift operation is greater than or equal to the width of the "
5391 "promoted left operand. [expr.shift]\nA shift by %d was requested",
5392 __y);
5393 return _SimdIntOperators::_S_make_derived(
5394 _Impl::_S_bit_shift_left(__data(__x), __y));
5395 }
5396
5397 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend
5398 _V
5399 operator>>(const _V& __x, int __y)
5400 {
5401 if (__y < 0)
5402 __invoke_ub(
5403 "The behavior is undefined if the right operand of a shift "
5404 "operation is negative. [expr.shift]\nA shift by %d was requested",
5405 __y);
5406 if (size_t(__y) >= sizeof(declval<_Tp>() << __y) * __CHAR_BIT__)
5407 __invoke_ub(
5408 "The behavior is undefined if the right operand of a shift "
5409 "operation is greater than or equal to the width of the promoted "
5410 "left operand. [expr.shift]\nA shift by %d was requested",
5411 __y);
5412 return _SimdIntOperators::_S_make_derived(
5413 _Impl::_S_bit_shift_right(__data(__x), __y));
5414 }
5415
5416 // unary operators (for integral _Tp)
5417 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR
5418 _V
5419 operator~() const
5420 { return {__private_init, _Impl::_S_complement(__derived()._M_data)}; }
5421 };
5422
5423//}}}1
5424/// @endcond
5425
5426// simd {{{
5427template <typename _Tp, typename _Abi>
5428 class simd : public _SimdIntOperators<
5429 simd<_Tp, _Abi>, _Tp, _Abi,
5430 conjunction<is_integral<_Tp>,
5431 typename _SimdTraits<_Tp, _Abi>::_IsValid>::value>,
5432 public _SimdTraits<_Tp, _Abi>::_SimdBase
5433 {
5434 using _Traits = _SimdTraits<_Tp, _Abi>;
5435 using _MemberType = typename _Traits::_SimdMember;
5436 using _CastType = typename _Traits::_SimdCastType;
5437 static constexpr _Tp* _S_type_tag = nullptr;
5438 friend typename _Traits::_SimdBase;
5439
5440 public:
5441 using _Impl = typename _Traits::_SimdImpl;
5442 friend _Impl;
5443 friend _SimdIntOperators<simd, _Tp, _Abi, true>;
5444
5445 using value_type = _Tp;
5446 using reference = _SmartReference<_MemberType, _Impl, value_type>;
5447 using mask_type = simd_mask<_Tp, _Abi>;
5448 using abi_type = _Abi;
5449
5450 static constexpr size_t size()
5451 { return __size_or_zero_v<_Tp, _Abi>; }
5452
5453 _GLIBCXX_SIMD_CONSTEXPR simd() = default;
5454 _GLIBCXX_SIMD_CONSTEXPR simd(const simd&) = default;
5455 _GLIBCXX_SIMD_CONSTEXPR simd(simd&&) noexcept = default;
5456 _GLIBCXX_SIMD_CONSTEXPR simd& operator=(const simd&) = default;
5457 _GLIBCXX_SIMD_CONSTEXPR simd& operator=(simd&&) noexcept = default;
5458
5459 // implicit broadcast constructor
5460 template <typename _Up,
5461 typename = enable_if_t<!is_same_v<__remove_cvref_t<_Up>, bool>>>
5462 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR
5463 simd(_ValuePreservingOrInt<_Up, value_type>&& __x)
5464 : _M_data(
5465 _Impl::_S_broadcast(static_cast<value_type>(static_cast<_Up&&>(__x))))
5466 {}
5467
5468 // implicit type conversion constructor (convert from fixed_size to
5469 // fixed_size)
5470 template <typename _Up>
5471 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR
5472 simd(const simd<_Up, simd_abi::fixed_size<size()>>& __x,
5473 enable_if_t<
5474 conjunction<
5475 is_same<simd_abi::fixed_size<size()>, abi_type>,
5476 negation<__is_narrowing_conversion<_Up, value_type>>,
5477 __converts_to_higher_integer_rank<_Up, value_type>>::value,
5478 void*> = nullptr)
5479 : simd{static_cast<array<_Up, size()>>(__x).data(), vector_aligned} {}
5480
5481 // explicit type conversion constructor
5482#ifdef _GLIBCXX_SIMD_ENABLE_STATIC_CAST
5483 template <typename _Up, typename _A2,
5484 typename = decltype(static_simd_cast<simd>(
5485 declval<const simd<_Up, _A2>&>()))>
5486 _GLIBCXX_SIMD_ALWAYS_INLINE explicit _GLIBCXX_SIMD_CONSTEXPR
5487 simd(const simd<_Up, _A2>& __x)
5488 : simd(static_simd_cast<simd>(__x)) {}
5489#endif // _GLIBCXX_SIMD_ENABLE_STATIC_CAST
5490
5491 // generator constructor
5492 template <typename _Fp>
5493 _GLIBCXX_SIMD_ALWAYS_INLINE explicit _GLIBCXX_SIMD_CONSTEXPR
5494 simd(_Fp&& __gen, _ValuePreservingOrInt<decltype(declval<_Fp>()(
5495 declval<_SizeConstant<0>&>())),
5496 value_type>* = nullptr)
5497 : _M_data(_Impl::_S_generator(static_cast<_Fp&&>(__gen), _S_type_tag)) {}
5498
5499 // load constructor
5500 template <typename _Up, typename _Flags>
5501 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR
5502 simd(const _Up* __mem, _IsSimdFlagType<_Flags>)
5503 : _M_data(
5504 _Impl::_S_load(_Flags::template _S_apply<simd>(__mem), _S_type_tag))
5505 {}
5506
5507 // loads [simd.load]
5508 template <typename _Up, typename _Flags>
5509 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR void
5510 copy_from(const _Vectorizable<_Up>* __mem, _IsSimdFlagType<_Flags>)
5511 {
5512 _M_data = static_cast<decltype(_M_data)>(
5513 _Impl::_S_load(_Flags::template _S_apply<simd>(__mem), _S_type_tag));
5514 }
5515
5516 // stores [simd.store]
5517 template <typename _Up, typename _Flags>
5518 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR void
5519 copy_to(_Vectorizable<_Up>* __mem, _IsSimdFlagType<_Flags>) const
5520 {
5521 _Impl::_S_store(_M_data, _Flags::template _S_apply<simd>(__mem),
5522 _S_type_tag);
5523 }
5524
5525 // scalar access
5526 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR reference
5527 operator[](size_t __i)
5528 { return {_M_data, int(__i)}; }
5529
5530 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR value_type
5531 operator[]([[maybe_unused]] size_t __i) const
5532 {
5533 if constexpr (__is_scalar_abi<_Abi>())
5534 {
5535 _GLIBCXX_DEBUG_ASSERT(__i == 0);
5536 return _M_data;
5537 }
5538 else
5539 return _M_data[__i];
5540 }
5541
5542 // increment and decrement:
5543 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR simd&
5544 operator++()
5545 {
5546 _Impl::_S_increment(_M_data);
5547 return *this;
5548 }
5549
5550 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR simd
5551 operator++(int)
5552 {
5553 simd __r = *this;
5554 _Impl::_S_increment(_M_data);
5555 return __r;
5556 }
5557
5558 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR simd&
5559 operator--()
5560 {
5561 _Impl::_S_decrement(_M_data);
5562 return *this;
5563 }
5564
5565 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR simd
5566 operator--(int)
5567 {
5568 simd __r = *this;
5569 _Impl::_S_decrement(_M_data);
5570 return __r;
5571 }
5572
5573 // unary operators (for any _Tp)
5574 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR mask_type
5575 operator!() const
5576 { return {__private_init, _Impl::_S_negate(_M_data)}; }
5577
5578 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR simd
5579 operator+() const
5580 { return *this; }
5581
5582 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR simd
5583 operator-() const
5584 { return {__private_init, _Impl::_S_unary_minus(_M_data)}; }
5585
5586 // access to internal representation (suggested extension)
5587 _GLIBCXX_SIMD_ALWAYS_INLINE explicit _GLIBCXX_SIMD_CONSTEXPR
5588 simd(_CastType __init) : _M_data(__init) {}
5589
5590 // compound assignment [simd.cassign]
5591 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd&
5592 operator+=(simd& __lhs, const simd& __x)
5593 { return __lhs = __lhs + __x; }
5594
5595 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd&
5596 operator-=(simd& __lhs, const simd& __x)
5597 { return __lhs = __lhs - __x; }
5598
5599 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd&
5600 operator*=(simd& __lhs, const simd& __x)
5601 { return __lhs = __lhs * __x; }
5602
5603 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd&
5604 operator/=(simd& __lhs, const simd& __x)
5605 { return __lhs = __lhs / __x; }
5606
5607 // binary operators [simd.binary]
5608 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd
5609 operator+(const simd& __x, const simd& __y)
5610 { return {__private_init, _Impl::_S_plus(__x._M_data, __y._M_data)}; }
5611
5612 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd
5613 operator-(const simd& __x, const simd& __y)
5614 { return {__private_init, _Impl::_S_minus(__x._M_data, __y._M_data)}; }
5615
5616 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd
5617 operator*(const simd& __x, const simd& __y)
5618 { return {__private_init, _Impl::_S_multiplies(__x._M_data, __y._M_data)}; }
5619
5620 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd
5621 operator/(const simd& __x, const simd& __y)
5622 { return {__private_init, _Impl::_S_divides(__x._M_data, __y._M_data)}; }
5623
5624 // compares [simd.comparison]
5625 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend mask_type
5626 operator==(const simd& __x, const simd& __y)
5627 { return simd::_S_make_mask(_Impl::_S_equal_to(__x._M_data, __y._M_data)); }
5628
5629 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend mask_type
5630 operator!=(const simd& __x, const simd& __y)
5631 {
5632 return simd::_S_make_mask(
5633 _Impl::_S_not_equal_to(__x._M_data, __y._M_data));
5634 }
5635
5636 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend mask_type
5637 operator<(const simd& __x, const simd& __y)
5638 { return simd::_S_make_mask(_Impl::_S_less(__x._M_data, __y._M_data)); }
5639
5640 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend mask_type
5641 operator<=(const simd& __x, const simd& __y)
5642 {
5643 return simd::_S_make_mask(_Impl::_S_less_equal(__x._M_data, __y._M_data));
5644 }
5645
5646 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend mask_type
5647 operator>(const simd& __x, const simd& __y)
5648 { return simd::_S_make_mask(_Impl::_S_less(__y._M_data, __x._M_data)); }
5649
5650 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend mask_type
5651 operator>=(const simd& __x, const simd& __y)
5652 {
5653 return simd::_S_make_mask(_Impl::_S_less_equal(__y._M_data, __x._M_data));
5654 }
5655
5656 // operator?: overloads (suggested extension) {{{
5657#ifdef __GXX_CONDITIONAL_IS_OVERLOADABLE__
5658 _GLIBCXX_SIMD_ALWAYS_INLINE _GLIBCXX_SIMD_CONSTEXPR friend simd
5659 operator?:(const mask_type& __k, const simd& __where_true,
5660 const simd& __where_false)
5661 {
5662 auto __ret = __where_false;
5663 _Impl::_S_masked_assign(__data(__k), __data(__ret), __data(__where_true));
5664 return __ret;
5665 }
5666
5667#endif // __GXX_CONDITIONAL_IS_OVERLOADABLE__
5668 // }}}
5669
5670 // "private" because of the first arguments's namespace
5671 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
5672 simd(_PrivateInit, const _MemberType& __init)
5673 : _M_data(__init) {}
5674
5675 // "private" because of the first arguments's namespace
5676 _GLIBCXX_SIMD_INTRINSIC
5677 simd(_BitsetInit, bitset<size()> __init) : _M_data()
5678 { where(mask_type(__bitset_init, __init), *this) = ~*this; }
5679
5680 _GLIBCXX_SIMD_INTRINSIC constexpr bool
5681 _M_is_constprop() const
5682 {
5683 if constexpr (__is_scalar_abi<_Abi>())
5684 return __builtin_constant_p(_M_data);
5685 else
5686 return _M_data._M_is_constprop();
5687 }
5688
5689 private:
5690 _GLIBCXX_SIMD_INTRINSIC static constexpr mask_type
5691 _S_make_mask(typename mask_type::_MemberType __k)
5692 { return {__private_init, __k}; }
5693
5694 friend const auto& __data<value_type, abi_type>(const simd&);
5695 friend auto& __data<value_type, abi_type>(simd&);
5696 alignas(_Traits::_S_simd_align) _MemberType _M_data;
5697 };
5698
5699// }}}
5700/// @cond undocumented
5701// __data {{{
5702template <typename _Tp, typename _Ap>
5703 _GLIBCXX_SIMD_INTRINSIC constexpr const auto&
5704 __data(const simd<_Tp, _Ap>& __x)
5705 { return __x._M_data; }
5706
5707template <typename _Tp, typename _Ap>
5708 _GLIBCXX_SIMD_INTRINSIC constexpr auto&
5709 __data(simd<_Tp, _Ap>& __x)
5710 { return __x._M_data; }
5711
5712// }}}
5713namespace __float_bitwise_operators { //{{{
5714template <typename _Tp, typename _Ap>
5715 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR simd<_Tp, _Ap>
5716 operator^(const simd<_Tp, _Ap>& __a, const simd<_Tp, _Ap>& __b)
5717 { return {__private_init, _Ap::_SimdImpl::_S_bit_xor(__data(__a), __data(__b))}; }
5718
5719template <typename _Tp, typename _Ap>
5720 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR simd<_Tp, _Ap>
5721 operator|(const simd<_Tp, _Ap>& __a, const simd<_Tp, _Ap>& __b)
5722 { return {__private_init, _Ap::_SimdImpl::_S_bit_or(__data(__a), __data(__b))}; }
5723
5724template <typename _Tp, typename _Ap>
5725 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR simd<_Tp, _Ap>
5726 operator&(const simd<_Tp, _Ap>& __a, const simd<_Tp, _Ap>& __b)
5727 { return {__private_init, _Ap::_SimdImpl::_S_bit_and(__data(__a), __data(__b))}; }
5728
5729template <typename _Tp, typename _Ap>
5730 _GLIBCXX_SIMD_INTRINSIC _GLIBCXX_SIMD_CONSTEXPR
5731 enable_if_t<is_floating_point_v<_Tp>, simd<_Tp, _Ap>>
5732 operator~(const simd<_Tp, _Ap>& __a)
5733 { return {__private_init, _Ap::_SimdImpl::_S_complement(__data(__a))}; }
5734} // namespace __float_bitwise_operators }}}
5735/// @endcond
5736
5737/// @}
5738_GLIBCXX_SIMD_END_NAMESPACE
5739
5740#endif // __cplusplus >= 201703L
5741#endif // _GLIBCXX_EXPERIMENTAL_SIMD_H
5742
5743// vim: foldmethod=marker foldmarker={{{,}}}
algorithm
bit
bitset
functional
iosfwd
utility
cmath
cstdio
cstring
std::chrono::operator%
constexpr duration< __common_rep_t< _Rep1, __disable_if_is_duration< _Rep2 > >, _Period > operator%(const duration< _Rep1, _Period > &__d, const _Rep2 &__s)
Definition chrono.h:783
std::conditional_t
typename conditional< _Cond, _Iftrue, _Iffalse >::type conditional_t
Alias template for conditional.
Definition type_traits:2944
std::remove_reference_t
typename remove_reference< _Tp >::type remove_reference_t
Alias template for remove_reference.
Definition type_traits:1886
std::make_unsigned_t
typename make_unsigned< _Tp >::type make_unsigned_t
Alias template for make_unsigned.
Definition type_traits:2246
std::enable_if_t
typename enable_if< _Cond, _Tp >::type enable_if_t
Alias template for enable_if.
Definition type_traits:2940
std::false_type
__bool_constant< false > false_type
The type used as a compile-time boolean with false value.
Definition type_traits:122
std::tuple_cat
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:2859
std::declval
auto declval() noexcept -> decltype(__declval< _Tp >(0))
Definition type_traits:2714
std::make_tuple
constexpr tuple< typename __decay_and_strip< _Elements >::__type... > make_tuple(_Elements &&... __args)
Create a tuple containing copies of the arguments.
Definition tuple:2723
std::move
constexpr std::remove_reference< _Tp >::type && move(_Tp &&__t) noexcept
Convert a value to an rvalue.
Definition move.h:138
std::max
constexpr const _Tp & max(const _Tp &, const _Tp &)
This does what you think it does.
Definition stl_algobase.h:256
std::min
constexpr const _Tp & min(const _Tp &, const _Tp &)
This does what you think it does.
Definition stl_algobase.h:232
std::experimental::fundamentals_v2::void_t
void void_t
A metafunction that always yields void, used for detecting valid types.
Definition experimental/type_traits:262
std
ISO C++ entities toplevel namespace is std.
std::make_index_sequence
make_integer_sequence< size_t, _Num > make_index_sequence
Alias template make_index_sequence.
Definition utility.h:559
std::operator^
constexpr bitset< _Nb > operator^(const bitset< _Nb > &__x, const bitset< _Nb > &__y) noexcept
Global bitwise operations on bitsets.
Definition bitset:1638
std::operator>>
std::basic_istream< _CharT, _Traits > & operator>>(std::basic_istream< _CharT, _Traits > &__is, bitset< _Nb > &__x)
Global I/O operators for bitsets.
Definition bitset:1658
std::operator<<
std::basic_ostream< _CharT, _Traits > & operator<<(std::basic_ostream< _CharT, _Traits > &__os, const bitset< _Nb > &__x)
Global I/O operators for bitsets.
Definition bitset:1754
std::operator|
constexpr bitset< _Nb > operator|(const bitset< _Nb > &__x, const bitset< _Nb > &__y) noexcept
Global bitwise operations on bitsets.
Definition bitset:1628
std::operator&
constexpr bitset< _Nb > operator&(const bitset< _Nb > &__x, const bitset< _Nb > &__y) noexcept
Global bitwise operations on bitsets.
Definition bitset:1618
simd_abi::deduce
Definition simd.h:3109