1/* Multiple versions of memset_chk
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.
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 <http://www.gnu.org/licenses/>. */
19
20#include <sysdep.h>
21#include <init-arch.h>
22
23/* Define multiple versions only for the definition in lib. */
24#if IS_IN (libc)
25# ifdef SHARED
26ENTRY(__memset_chk)
27 .type __memset_chk, @gnu_indirect_function
28 LOAD_RTLD_GLOBAL_RO_RDX
29 lea __memset_chk_sse2_unaligned_erms(%rip), %RAX_LP
30 HAS_CPU_FEATURE (ERMS)
31 jnz 1f
32 lea __memset_chk_sse2_unaligned(%rip), %RAX_LP
331:
34 HAS_ARCH_FEATURE (AVX2_Usable)
35 jz 2f
36 lea __memset_chk_avx2_unaligned_erms(%rip), %RAX_LP
37 HAS_CPU_FEATURE (ERMS)
38 jnz L(AVX512F)
39 lea __memset_chk_avx2_unaligned(%rip), %RAX_LP
40L(AVX512F):
41 HAS_ARCH_FEATURE (AVX512F_Usable)
42 jz 2f
43 lea __memset_chk_avx512_no_vzeroupper(%rip), %RAX_LP
44 HAS_ARCH_FEATURE (Prefer_No_VZEROUPPER)
45 jnz 2f
46 lea __memset_chk_avx512_unaligned_erms(%rip), %RAX_LP
47 HAS_CPU_FEATURE (ERMS)
48 jnz 2f
49 lea __memset_chk_avx512_unaligned(%rip), %RAX_LP
502: ret
51END(__memset_chk)
52
53strong_alias (__memset_chk, __memset_zero_constant_len_parameter)
54 .section .gnu.warning.__memset_zero_constant_len_parameter
55 .string "memset used with constant zero length parameter; this could be due to transposed parameters"
56# else
57# include "../memset_chk.S"
58# endif
59#endif
60