]>
git.ipfire.org Git - thirdparty/glibc.git/blob - sysdeps/x86_64/multiarch/ifunc-strcpy.h
1 /* Common definition for ifunc selections optimized with SSE2, unaligned
3 All versions must be listed in ifunc-impl-list.c.
4 Copyright (C) 2017-2023 Free Software Foundation, Inc.
5 This file is part of the GNU C Library.
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public
9 License as published by the Free Software Foundation; either
10 version 2.1 of the License, or (at your option) any later version.
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
17 You should have received a copy of the GNU Lesser General Public
18 License along with the GNU C Library; if not, see
19 <https://www.gnu.org/licenses/>. */
21 #include <init-arch.h>
23 extern __typeof (REDIRECT_NAME
) OPTIMIZE (evex
) attribute_hidden
;
25 extern __typeof (REDIRECT_NAME
) OPTIMIZE (avx2
) attribute_hidden
;
26 extern __typeof (REDIRECT_NAME
) OPTIMIZE (avx2_rtm
) attribute_hidden
;
28 extern __typeof (REDIRECT_NAME
)
29 OPTIMIZE (sse2_unaligned
) attribute_hidden
;
31 extern __typeof (REDIRECT_NAME
) OPTIMIZE (sse2
) attribute_hidden
;
36 const struct cpu_features
*cpu_features
= __get_cpu_features ();
38 if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features
, AVX2
)
39 && X86_ISA_CPU_FEATURES_ARCH_P (cpu_features
,
40 AVX_Fast_Unaligned_Load
, ))
42 if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features
, AVX512VL
)
43 && X86_ISA_CPU_FEATURE_USABLE_P (cpu_features
, AVX512BW
))
44 return OPTIMIZE (evex
);
46 if (CPU_FEATURE_USABLE_P (cpu_features
, RTM
))
47 return OPTIMIZE (avx2_rtm
);
49 if (X86_ISA_CPU_FEATURES_ARCH_P (cpu_features
,
50 Prefer_No_VZEROUPPER
, !))
51 return OPTIMIZE (avx2
);
54 if (X86_ISA_CPU_FEATURES_ARCH_P (cpu_features
, Fast_Unaligned_Load
, ))
55 return OPTIMIZE (sse2_unaligned
);
57 return OPTIMIZE (sse2
);