1/* Multiple versions of __memcpy_chk
2 All versions must be listed in ifunc-impl-list.c.
3 Copyright (C) 2010-2016 Free Software Foundation, Inc.
4 Contributed by Intel Corporation.
5 This file is part of the GNU C Library.
6
7 The GNU C Library is free software; you can redistribute it and/or
8 modify it under the terms of the GNU Lesser General Public
9 License as published by the Free Software Foundation; either
10 version 2.1 of the License, or (at your option) any later version.
11
12 The GNU C Library is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 Lesser General Public License for more details.
16
17 You should have received a copy of the GNU Lesser General Public
18 License along with the GNU C Library; if not, see
19 <http://www.gnu.org/licenses/>. */
20
21#include <sysdep.h>
22#include <init-arch.h>
23
24/* Define multiple versions only for the definition in lib and for
25 DSO. There are no multiarch memcpy functions for static binaries.
26 */
27#if IS_IN (libc)
28# ifdef SHARED
29 .text
30ENTRY(__memcpy_chk)
31 .type __memcpy_chk, @gnu_indirect_function
32 LOAD_RTLD_GLOBAL_RO_RDX
33 HAS_ARCH_FEATURE (AVX512F_Usable)
34 jz 1f
35 lea __memcpy_chk_avx512_no_vzeroupper(%rip), %RAX_LP
36 HAS_ARCH_FEATURE (Prefer_No_VZEROUPPER)
37 jnz 2f
38 lea __memcpy_chk_avx512_unaligned_erms(%rip), %RAX_LP
39 HAS_CPU_FEATURE (ERMS)
40 jnz 2f
41 lea __memcpy_chk_avx512_unaligned(%rip), %RAX_LP
42 ret
431: lea __memcpy_chk_avx_unaligned(%rip), %RAX_LP
44 HAS_ARCH_FEATURE (AVX_Fast_Unaligned_Load)
45 jz L(Fast_Unaligned_Load)
46 HAS_CPU_FEATURE (ERMS)
47 jz 2f
48 lea __memcpy_chk_avx_unaligned_erms(%rip), %RAX_LP
49 ret
50L(Fast_Unaligned_Load):
51 lea __memcpy_chk_sse2_unaligned(%rip), %RAX_LP
52 HAS_ARCH_FEATURE (Fast_Unaligned_Copy)
53 jz L(SSSE3)
54 HAS_CPU_FEATURE (ERMS)
55 jz 2f
56 lea __memcpy_chk_sse2_unaligned_erms(%rip), %RAX_LP
57 ret
58L(SSSE3):
59 HAS_CPU_FEATURE (SSSE3)
60 jz 2f
61 lea __memcpy_chk_ssse3_back(%rip), %RAX_LP
62 HAS_ARCH_FEATURE (Fast_Copy_Backward)
63 jnz 2f
64 lea __memcpy_chk_ssse3(%rip), %RAX_LP
652: ret
66END(__memcpy_chk)
67# else
68# include "../memcpy_chk.S"
69# endif
70#endif
71