1/* Common definition for ifunc selections optimized with SSE2 and AVX2.
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 (avx2) attribute_hidden;
24extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2_rtm) attribute_hidden;
25extern __typeof (REDIRECT_NAME) OPTIMIZE (evex) 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, AVX2)
33 && CPU_FEATURE_USABLE_P (cpu_features, BMI2)
34 && CPU_FEATURES_ARCH_P (cpu_features, AVX_Fast_Unaligned_Load))
35 {
36 if (CPU_FEATURE_USABLE_P (cpu_features, AVX512VL)
37 && CPU_FEATURE_USABLE_P (cpu_features, AVX512BW))
38 return OPTIMIZE (evex);
39
40 if (CPU_FEATURE_USABLE_P (cpu_features, RTM))
41 return OPTIMIZE (avx2_rtm);
42
43 if (!CPU_FEATURES_ARCH_P (cpu_features, Prefer_No_VZEROUPPER))
44 return OPTIMIZE (avx2);
45 }
46
47 return OPTIMIZE (sse2);
48}
49