1 /* Multiple versions of memset
2 All versions must be listed in ifunc-impl-list.c.
3 Copyright (C) 2014-2015 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/>. */
20 #ifdef HAVE_AVX2_SUPPORT
22 #include <shlib-compat.h>
23 #include <init-arch.h>
25 /* Define multiple versions only for the definition in lib. */
28 .type memset, @gnu_indirect_function
29 cmpl $0, __cpu_features+KIND_OFFSET(%rip)
31 call __init_cpu_features
32 1: leaq __memset_sse2(%rip), %rax
33 testl $bit_AVX2_Usable, __cpu_features+FEATURE_OFFSET+index_AVX2_Usable(%rip)
35 leaq __memset_avx2(%rip), %rax
42 # define memset __memset_sse2
45 # define __memset_chk __memset_chk_sse2
48 # undef libc_hidden_builtin_def
49 /* It doesn't make sense to send libc-internal memset calls through a PLT.
50 The speedup we get from using GPR instruction is likely eaten away
51 by the indirect call in the PLT. */
52 # define libc_hidden_builtin_def(name) \
53 .globl __GI_memset; __GI_memset = __memset_sse2
57 # define strong_alias(original, alias)
61 #include "../memset.S"