1 /* Multiple versions of memset
2 All versions must be listed in ifunc-impl-list.c.
3 Copyright (C) 2014-2016 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 <http://www.gnu.org/licenses/>. */
21 #include <shlib-compat.h>
22 #include <init-arch.h>
24 /* Define multiple versions only for the definition in lib. */
27 .type memset, @gnu_indirect_function
28 LOAD_RTLD_GLOBAL_RO_RDX
29 lea __memset_erms(%rip), %RAX_LP
30 HAS_ARCH_FEATURE (Prefer_ERMS)
32 lea __memset_sse2_unaligned_erms(%rip), %RAX_LP
33 HAS_CPU_FEATURE (ERMS)
35 lea __memset_sse2_unaligned(%rip), %RAX_LP
37 HAS_ARCH_FEATURE (AVX2_Usable)
39 lea __memset_avx2_unaligned_erms(%rip), %RAX_LP
40 HAS_CPU_FEATURE (ERMS)
42 lea __memset_avx2_unaligned(%rip), %RAX_LP
44 HAS_ARCH_FEATURE (AVX512F_Usable)
46 lea __memset_avx512_no_vzeroupper(%rip), %RAX_LP
47 HAS_ARCH_FEATURE (Prefer_No_VZEROUPPER)
49 lea __memset_avx512_unaligned_erms(%rip), %RAX_LP
50 HAS_CPU_FEATURE (ERMS)
52 lea __memset_avx512_unaligned(%rip), %RAX_LP
58 # define MEMSET_SYMBOL(p,s) p##_sse2_##s
61 # undef libc_hidden_builtin_def
62 /* It doesn't make sense to send libc-internal memset calls through a PLT.
63 The speedup we get from using SSE2 instructions is likely eaten away
64 by the indirect call in the PLT. */
65 # define libc_hidden_builtin_def(name) \
66 .globl __GI_memset; __GI_memset = __memset_sse2_unaligned
70 # define strong_alias(original, alias)
73 #include "../memset.S"