1/* Common definition for wmemset/wmemset_chk ifunc selections.
2 Copyright (C) 2017 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19#include <init-arch.h>
20
21extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2_unaligned) attribute_hidden;
22extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2_unaligned) attribute_hidden;
23extern __typeof (REDIRECT_NAME) OPTIMIZE (avx512_unaligned) attribute_hidden;
24
25static inline void *
26IFUNC_SELECTOR (void)
27{
28 const struct cpu_features* cpu_features = __get_cpu_features ();
29
30 if (!CPU_FEATURES_ARCH_P (cpu_features, Prefer_No_VZEROUPPER)
31 && CPU_FEATURES_ARCH_P (cpu_features, AVX2_Usable)
32 && CPU_FEATURES_ARCH_P (cpu_features, AVX_Fast_Unaligned_Load))
33 {
34 if (CPU_FEATURES_ARCH_P (cpu_features, AVX512F_Usable)
35 && !CPU_FEATURES_ARCH_P (cpu_features, Prefer_No_AVX512))
36 return OPTIMIZE (avx512_unaligned);
37 else
38 return OPTIMIZE (avx2_unaligned);
39 }
40
41 return OPTIMIZE (sse2_unaligned);
42}
43