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6f573a27 NG |
1 | /* Common definition for ifunc selections for wcslen and wcsnlen |
2 | All versions must be listed in ifunc-impl-list.c. | |
581c785b | 3 | Copyright (C) 2017-2022 Free Software Foundation, Inc. |
6f573a27 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 | ||
22 | extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden; | |
23 | extern __typeof (REDIRECT_NAME) OPTIMIZE (sse4_1) attribute_hidden; | |
24 | extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2) attribute_hidden; | |
25 | extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2_rtm) attribute_hidden; | |
26 | extern __typeof (REDIRECT_NAME) OPTIMIZE (evex) attribute_hidden; | |
27 | ||
28 | static inline void * | |
29 | IFUNC_SELECTOR (void) | |
30 | { | |
31 | const struct cpu_features* cpu_features = __get_cpu_features (); | |
32 | ||
33 | if (CPU_FEATURE_USABLE_P (cpu_features, AVX2) | |
34 | && CPU_FEATURE_USABLE_P (cpu_features, BMI2) | |
35 | && CPU_FEATURES_ARCH_P (cpu_features, AVX_Fast_Unaligned_Load)) | |
36 | { | |
37 | if (CPU_FEATURE_USABLE_P (cpu_features, AVX512VL) | |
38 | && CPU_FEATURE_USABLE_P (cpu_features, AVX512BW)) | |
39 | return OPTIMIZE (evex); | |
40 | ||
41 | if (CPU_FEATURE_USABLE_P (cpu_features, RTM)) | |
42 | return OPTIMIZE (avx2_rtm); | |
43 | ||
44 | if (!CPU_FEATURES_ARCH_P (cpu_features, Prefer_No_VZEROUPPER)) | |
45 | return OPTIMIZE (avx2); | |
46 | } | |
47 | ||
48 | if (CPU_FEATURE_USABLE_P (cpu_features, SSE4_1)) | |
49 | return OPTIMIZE (sse4_1); | |
50 | ||
51 | return OPTIMIZE (sse2); | |
52 | } |