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cf4fd28e NG |
1 | /* Common definition for __memcmpeq ifunc selections. |
2 | All versions must be listed in ifunc-impl-list.c. | |
6d7e8eda | 3 | Copyright (C) 2017-2023 Free Software Foundation, Inc. |
cf4fd28e NG |
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 | <https://www.gnu.org/licenses/>. */ | |
19 | ||
20 | # include <init-arch.h> | |
21 | ||
ae308947 NG |
22 | extern __typeof (REDIRECT_NAME) OPTIMIZE1 (evex) attribute_hidden; |
23 | ||
cf4fd28e NG |
24 | extern __typeof (REDIRECT_NAME) OPTIMIZE1 (avx2) attribute_hidden; |
25 | extern __typeof (REDIRECT_NAME) OPTIMIZE1 (avx2_rtm) attribute_hidden; | |
ae308947 NG |
26 | |
27 | extern __typeof (REDIRECT_NAME) OPTIMIZE1 (sse2) attribute_hidden; | |
cf4fd28e NG |
28 | |
29 | static inline void * | |
30 | IFUNC_SELECTOR (void) | |
31 | { | |
ae308947 | 32 | const struct cpu_features *cpu_features = __get_cpu_features (); |
cf4fd28e | 33 | |
ae308947 NG |
34 | if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, AVX2) |
35 | && X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, BMI2) | |
36 | && X86_ISA_CPU_FEATURES_ARCH_P (cpu_features, | |
37 | AVX_Fast_Unaligned_Load, )) | |
cf4fd28e | 38 | { |
ae308947 NG |
39 | if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, AVX512VL) |
40 | && X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, AVX512BW)) | |
cf4fd28e NG |
41 | return OPTIMIZE1 (evex); |
42 | ||
43 | if (CPU_FEATURE_USABLE_P (cpu_features, RTM)) | |
44 | return OPTIMIZE1 (avx2_rtm); | |
45 | ||
ae308947 NG |
46 | if (X86_ISA_CPU_FEATURES_ARCH_P (cpu_features, |
47 | Prefer_No_VZEROUPPER, !)) | |
cf4fd28e NG |
48 | return OPTIMIZE1 (avx2); |
49 | } | |
50 | ||
51 | return OPTIMIZE1 (sse2); | |
52 | } |