1/* Multiple versions of __memmove_chk
2 All versions must be listed in ifunc-impl-list.c.
3 Copyright (C) 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 and for
24 DSO. There are no multiarch memmove functions for static binaries.
25 */
26#if IS_IN (libc)
27# ifdef SHARED
28 .text
29ENTRY(__memmove_chk)
30 .type __memmove_chk, @gnu_indirect_function
31 LOAD_RTLD_GLOBAL_RO_RDX
32 HAS_ARCH_FEATURE (AVX512F_Usable)
33 jz 1f
34 lea __memmove_chk_avx512_no_vzeroupper(%rip), %RAX_LP
35 HAS_ARCH_FEATURE (Prefer_No_VZEROUPPER)
36 jnz 2f
37 lea __memmove_chk_avx512_unaligned_erms(%rip), %RAX_LP
38 HAS_CPU_FEATURE (ERMS)
39 jnz 2f
40 lea __memmove_chk_avx512_unaligned(%rip), %RAX_LP
41 ret
421: lea __memmove_chk_avx_unaligned(%rip), %RAX_LP
43 HAS_ARCH_FEATURE (AVX_Fast_Unaligned_Load)
44 jz L(Fast_Unaligned_Load)
45 HAS_CPU_FEATURE (ERMS)
46 jz 2f
47 lea __memmove_chk_avx_unaligned_erms(%rip), %RAX_LP
48 ret
49L(Fast_Unaligned_Load):
50 lea __memmove_chk_sse2_unaligned(%rip), %RAX_LP
51 HAS_ARCH_FEATURE (Fast_Unaligned_Copy)
52 jz L(SSSE3)
53 HAS_CPU_FEATURE (ERMS)
54 jz 2f
55 lea __memmove_chk_sse2_unaligned_erms(%rip), %RAX_LP
56 ret
57L(SSSE3):
58 HAS_CPU_FEATURE (SSSE3)
59 jz 2f
60 lea __memmove_chk_ssse3_back(%rip), %RAX_LP
61 HAS_ARCH_FEATURE (Fast_Copy_Backward)
62 jnz 2f
63 lea __memmove_chk_ssse3(%rip), %RAX_LP
642: ret
65END(__memmove_chk)
66# else
67# include "../memmove_chk.S"
68# endif
69#endif
70