projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| d4cc385c L |
1 | /* Multiple versions of wcsnlen. |
| 2 | All versions must be listed in ifunc-impl-list.c. | |
| 04277e02 | 3 | Copyright (C) 2017-2019 Free Software Foundation, Inc. |
| d4cc385c L |
4 | This file is part of the GNU C Library. |
| 5 | ||
| 6 | The GNU C Library is free software; you can redistribute it and/or | |
| 7 | modify it under the terms of the GNU Lesser General Public | |
| 8 | License as published by the Free Software Foundation; either | |
| 9 | version 2.1 of the License, or (at your option) any later version. | |
| 10 | ||
| 11 | The GNU C 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 GNU | |
| 14 | Lesser General Public License for more details. | |
| 15 | ||
| 16 | You should have received a copy of the GNU Lesser General Public | |
| 17 | License along with the GNU C Library; if not, see | |
| 18 | <http://www.gnu.org/licenses/>. */ | |
| 19 | ||
| 58d021c8 | 20 | /* Define multiple versions only for the definition in libc. */ |
| d4cc385c L |
21 | #if IS_IN (libc) |
| 22 | # define __wcsnlen __redirect_wcsnlen | |
| 23 | # include <wchar.h> | |
| 24 | # undef __wcsnlen | |
| 25 | ||
| 26 | # define SYMBOL_NAME wcsnlen | |
| 2e87c7d1 L |
27 | # include <init-arch.h> |
| 28 | ||
| 29 | extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden; | |
| 30 | extern __typeof (REDIRECT_NAME) OPTIMIZE (sse4_1) attribute_hidden; | |
| dc485ceb | 31 | extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2) attribute_hidden; |
| c671b231 | 32 | extern __typeof (REDIRECT_NAME) OPTIMIZE (evex) attribute_hidden; |
| 2e87c7d1 L |
33 | |
| 34 | static inline void * | |
| 35 | IFUNC_SELECTOR (void) | |
| 36 | { | |
| 37 | const struct cpu_features* cpu_features = __get_cpu_features (); | |
| 38 | ||
| c671b231 | 39 | if (CPU_FEATURES_ARCH_P (cpu_features, AVX2_Usable) |
| dc485ceb | 40 | && CPU_FEATURES_ARCH_P (cpu_features, AVX_Fast_Unaligned_Load)) |
| c671b231 L |
41 | { |
| 42 | if (CPU_FEATURES_ARCH_P (cpu_features, AVX512VL_Usable) | |
| 43 | && CPU_FEATURES_ARCH_P (cpu_features, AVX512BW_Usable) | |
| 44 | && CPU_FEATURES_CPU_P (cpu_features, BMI2)) | |
| 45 | return OPTIMIZE (evex); | |
| 46 | ||
| 47 | if (!CPU_FEATURES_ARCH_P (cpu_features, Prefer_No_VZEROUPPER)) | |
| 48 | return OPTIMIZE (avx2); | |
| 49 | } | |
| dc485ceb | 50 | |
| 2e87c7d1 L |
51 | if (CPU_FEATURES_CPU_P (cpu_features, SSE4_1)) |
| 52 | return OPTIMIZE (sse4_1); | |
| 53 | ||
| 54 | return OPTIMIZE (sse2); | |
| 55 | } | |
| d4cc385c L |
56 | |
| 57 | libc_ifunc_redirected (__redirect_wcsnlen, __wcsnlen, IFUNC_SELECTOR ()); | |
| 58 | weak_alias (__wcsnlen, wcsnlen); | |
| 59 | #endif |