1/* Common definition for wmemset/wmemset_chk ifunc selections.
2 Copyright (C) 2017-2022 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 <https://www.gnu.org/licenses/>. */
18
19#include <init-arch.h>
20
21extern __typeof (REDIRECT_NAME) OPTIMIZE (avx512_unaligned) attribute_hidden;
22
23extern __typeof (REDIRECT_NAME) OPTIMIZE (evex_unaligned) attribute_hidden;
24
25extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2_unaligned) attribute_hidden;
26extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2_unaligned_rtm)
27 attribute_hidden;
28
29extern __typeof (REDIRECT_NAME) OPTIMIZE (sse2_unaligned) attribute_hidden;
30
31static inline void *
32IFUNC_SELECTOR (void)
33{
34 const struct cpu_features *cpu_features = __get_cpu_features ();
35
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, !))
39 {
40 if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, AVX512VL))
41 {
42 if (!CPU_FEATURES_ARCH_P (cpu_features, Prefer_No_AVX512))
43 return OPTIMIZE (avx512_unaligned);
44
45 return OPTIMIZE (evex_unaligned);
46 }
47
48 if (CPU_FEATURE_USABLE_P (cpu_features, RTM))
49 return OPTIMIZE (avx2_unaligned_rtm);
50
51 if (X86_ISA_CPU_FEATURES_ARCH_P (cpu_features,
52 Prefer_No_VZEROUPPER, !))
53 return OPTIMIZE (avx2_unaligned);
54 }
55
56 return OPTIMIZE (sse2_unaligned);
57}
58