1 /* Common definition for __memcmpeq ifunc selections.
2 All versions must be listed in ifunc-impl-list.c.
3 Copyright (C) 2017-2023 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
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.
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.
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/>. */
20 # include <init-arch.h>
22 extern __typeof (REDIRECT_NAME
) OPTIMIZE1 (evex
) attribute_hidden
;
24 extern __typeof (REDIRECT_NAME
) OPTIMIZE1 (avx2
) attribute_hidden
;
25 extern __typeof (REDIRECT_NAME
) OPTIMIZE1 (avx2_rtm
) attribute_hidden
;
27 extern __typeof (REDIRECT_NAME
) OPTIMIZE1 (sse2
) attribute_hidden
;
32 const struct cpu_features
*cpu_features
= __get_cpu_features ();
34 if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features
, AVX2
)
35 && X86_ISA_CPU_FEATURE_USABLE_P (cpu_features
, BMI2
)
36 && X86_ISA_CPU_FEATURES_ARCH_P (cpu_features
,
37 AVX_Fast_Unaligned_Load
, ))
39 if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features
, AVX512VL
)
40 && X86_ISA_CPU_FEATURE_USABLE_P (cpu_features
, AVX512BW
))
41 return OPTIMIZE1 (evex
);
43 if (CPU_FEATURE_USABLE_P (cpu_features
, RTM
))
44 return OPTIMIZE1 (avx2_rtm
);
46 if (X86_ISA_CPU_FEATURES_ARCH_P (cpu_features
,
47 Prefer_No_VZEROUPPER
, !))
48 return OPTIMIZE1 (avx2
);
51 return OPTIMIZE1 (sse2
);