]>
git.ipfire.org Git - thirdparty/glibc.git/blob - sysdeps/x86_64/multiarch/ifunc-strcasecmp.h
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.
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
) OPTIMIZE (evex
) attribute_hidden
;
24 extern __typeof (REDIRECT_NAME
) OPTIMIZE (avx2
) attribute_hidden
;
25 extern __typeof (REDIRECT_NAME
) OPTIMIZE (avx2_rtm
) attribute_hidden
;
27 extern __typeof (REDIRECT_NAME
) OPTIMIZE (sse42
) attribute_hidden
;
29 extern __typeof (REDIRECT_NAME
) OPTIMIZE (sse2
) attribute_hidden
;
34 const struct cpu_features
*cpu_features
= __get_cpu_features ();
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
, ))
40 if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features
, AVX512VL
)
41 && X86_ISA_CPU_FEATURE_USABLE_P (cpu_features
, AVX512BW
))
42 return OPTIMIZE (evex
);
44 if (CPU_FEATURE_USABLE_P (cpu_features
, RTM
))
45 return OPTIMIZE (avx2_rtm
);
47 if (X86_ISA_CPU_FEATURES_ARCH_P (cpu_features
,
48 Prefer_No_VZEROUPPER
, !))
49 return OPTIMIZE (avx2
);
52 if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features
, SSE4_2
)
53 /* Keep this as a runtime check as its not guaranteed at ISA
55 && !CPU_FEATURES_ARCH_P (cpu_features
, Slow_SSE4_2
))
56 return OPTIMIZE (sse42
);
58 return OPTIMIZE (sse2
);