1/* Common definition for strcasecmp famly ifunc selections.
2 All versions must be listed in ifunc-impl-list.c.
3 Copyright (C) 2017-2022 Free Software Foundation, Inc.
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
22extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2) attribute_hidden;
23extern __typeof (REDIRECT_NAME) OPTIMIZE (ssse3) attribute_hidden;
24extern __typeof (REDIRECT_NAME) OPTIMIZE (sse42) attribute_hidden;
25extern __typeof (REDIRECT_NAME) OPTIMIZE (avx) attribute_hidden;
26
27static inline void *
28IFUNC_SELECTOR (void)
29{
30 const struct cpu_features* cpu_features = __get_cpu_features ();
31
32 if (CPU_FEATURE_USABLE_P (cpu_features, AVX))
33 return OPTIMIZE (avx);
34
35 if (CPU_FEATURE_USABLE_P (cpu_features, SSE4_2)
36 && !CPU_FEATURES_ARCH_P (cpu_features, Slow_SSE4_2))
37 return OPTIMIZE (sse42);
38
39 if (CPU_FEATURE_USABLE_P (cpu_features, SSSE3))
40 return OPTIMIZE (ssse3);
41
42 return OPTIMIZE (sse2);
43}
44