projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 11ffcacb L |
1 | /* Common definition for strcasecmp famly ifunc selections. |
| 2 | All versions must be listed in ifunc-impl-list.c. | |
| 581c785b | 3 | Copyright (C) 2017-2022 Free Software Foundation, Inc. |
| 11ffcacb 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 | |
| 5a82c748 | 18 | <https://www.gnu.org/licenses/>. */ |
| 11ffcacb L |
19 | |
| 20 | #include <init-arch.h> | |
| 21 | ||
| ceabdcd1 NG |
22 | extern __typeof (REDIRECT_NAME) OPTIMIZE (evex) attribute_hidden; |
| 23 | ||
| bbf81222 NG |
24 | extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2) attribute_hidden; |
| 25 | extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2_rtm) attribute_hidden; | |
| ceabdcd1 NG |
26 | |
| 27 | extern __typeof (REDIRECT_NAME) OPTIMIZE (sse42) attribute_hidden; | |
| 28 | ||
| 29 | extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden; | |
| 11ffcacb L |
30 | |
| 31 | static inline void * | |
| 32 | IFUNC_SELECTOR (void) | |
| 33 | { | |
| ceabdcd1 | 34 | const struct cpu_features *cpu_features = __get_cpu_features (); |
| 11ffcacb | 35 | |
| ceabdcd1 NG |
36 | if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, AVX2) |
| 37 | && X86_ISA_CPU_FEATURES_ARCH_P (cpu_features, | |
| 38 | AVX_Fast_Unaligned_Load, )) | |
| bbf81222 | 39 | { |
| ceabdcd1 NG |
40 | if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, AVX512VL) |
| 41 | && X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, AVX512BW)) | |
| 42 | return OPTIMIZE (evex); | |
| 84e7c46d | 43 | |
| bbf81222 | 44 | if (CPU_FEATURE_USABLE_P (cpu_features, RTM)) |
| ceabdcd1 | 45 | return OPTIMIZE (avx2_rtm); |
| bbf81222 | 46 | |
| ceabdcd1 NG |
47 | if (X86_ISA_CPU_FEATURES_ARCH_P (cpu_features, |
| 48 | Prefer_No_VZEROUPPER, !)) | |
| 49 | return OPTIMIZE (avx2); | |
| bbf81222 NG |
50 | } |
| 51 | ||
| ceabdcd1 NG |
52 | if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, SSE4_2) |
| 53 | /* Keep this as a runtime check as its not guaranteed at ISA | |
| 54 | level 2. */ | |
| 11ffcacb L |
55 | && !CPU_FEATURES_ARCH_P (cpu_features, Slow_SSE4_2)) |
| 56 | return OPTIMIZE (sse42); | |
| 57 | ||
| 11ffcacb L |
58 | return OPTIMIZE (sse2); |
| 59 | } |