1/* Multiple versions of wcscpy.
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.
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/* Define multiple versions only for the definition in libc. */
21#if IS_IN (libc)
22# define __wcscpy __redirect_wcscpy
23# include <wchar.h>
24# undef __wcscpy
25
26# define SYMBOL_NAME wcscpy
27# include <init-arch.h>
28
29extern __typeof (REDIRECT_NAME) OPTIMIZE (evex) attribute_hidden;
30
31extern __typeof (REDIRECT_NAME) OPTIMIZE (avx2) attribute_hidden;
32
33extern __typeof (REDIRECT_NAME) OPTIMIZE (ssse3) attribute_hidden;
34
35extern __typeof (REDIRECT_NAME) OPTIMIZE (generic) attribute_hidden;
36
37static inline void *
38IFUNC_SELECTOR (void)
39{
40 const struct cpu_features* cpu_features = __get_cpu_features ();
41
42 if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, AVX2)
43 && X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, BMI2)
44 && X86_ISA_CPU_FEATURES_ARCH_P (cpu_features, AVX_Fast_Unaligned_Load, ))
45 {
46 if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, AVX512VL)
47 && X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, AVX512BW))
48 return OPTIMIZE (evex);
49
50 if (X86_ISA_CPU_FEATURES_ARCH_P (cpu_features, Prefer_No_VZEROUPPER, !))
51 return OPTIMIZE (avx2);
52 }
53
54 if (X86_ISA_CPU_FEATURE_USABLE_P (cpu_features, SSSE3))
55 return OPTIMIZE (ssse3);
56
57 return OPTIMIZE (generic);
58}
59
60libc_ifunc_redirected (__redirect_wcscpy, __wcscpy, IFUNC_SELECTOR ());
61weak_alias (__wcscpy, wcscpy)
62# ifdef SHARED
63__hidden_ver1 (__wcscpy, __GI___wcscpy, __redirect_wcscpy)
64 __attribute__((visibility ("hidden"))) __attribute_copy__ (wcscpy);
65# endif
66#endif
67