1/* Multiple versions of strcpy
2 All versions must be listed in ifunc-impl-list.c.
3 Copyright (C) 2009-2017 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#if !defined (USE_AS_STPCPY) && !defined (USE_AS_STRNCPY)
25# ifndef STRCPY
26# define STRCPY strcpy
27# endif
28#endif
29
30#ifdef USE_AS_STPCPY
31# ifdef USE_AS_STRNCPY
32# define STRCPY_SSSE3 __stpncpy_ssse3
33# define STRCPY_SSE2 __stpncpy_sse2
34# define STRCPY_SSE2_UNALIGNED __stpncpy_sse2_unaligned
35# define __GI_STRCPY __GI_stpncpy
36# define __GI___STRCPY __GI___stpncpy
37# else
38# define STRCPY_SSSE3 __stpcpy_ssse3
39# define STRCPY_SSE2 __stpcpy_sse2
40# define STRCPY_SSE2_UNALIGNED __stpcpy_sse2_unaligned
41# define __GI_STRCPY __GI_stpcpy
42# define __GI___STRCPY __GI___stpcpy
43# endif
44#else
45# ifdef USE_AS_STRNCPY
46# define STRCPY_SSSE3 __strncpy_ssse3
47# define STRCPY_SSE2 __strncpy_sse2
48# define STRCPY_SSE2_UNALIGNED __strncpy_sse2_unaligned
49# define __GI_STRCPY __GI_strncpy
50# else
51# define STRCPY_SSSE3 __strcpy_ssse3
52# define STRCPY_SSE2 __strcpy_sse2
53# define STRCPY_SSE2_UNALIGNED __strcpy_sse2_unaligned
54# define __GI_STRCPY __GI_strcpy
55# endif
56#endif
57
58
59/* Define multiple versions only for the definition in libc. */
60#if IS_IN (libc)
61 .text
62ENTRY(STRCPY)
63 .type STRCPY, @gnu_indirect_function
64 LOAD_RTLD_GLOBAL_RO_RDX
65 leaq STRCPY_SSE2_UNALIGNED(%rip), %rax
66 HAS_ARCH_FEATURE (Fast_Unaligned_Load)
67 jnz 2f
68 leaq STRCPY_SSE2(%rip), %rax
69 HAS_CPU_FEATURE (SSSE3)
70 jz 2f
71 leaq STRCPY_SSSE3(%rip), %rax
722: ret
73END(STRCPY)
74
75# undef ENTRY
76# define ENTRY(name) \
77 .type STRCPY_SSE2, @function; \
78 .align 16; \
79 .globl STRCPY_SSE2; \
80 .hidden STRCPY_SSE2; \
81 STRCPY_SSE2: cfi_startproc; \
82 CALL_MCOUNT
83# undef END
84# define END(name) \
85 cfi_endproc; .size STRCPY_SSE2, .-STRCPY_SSE2
86# undef libc_hidden_builtin_def
87/* It doesn't make sense to send libc-internal strcpy calls through a PLT.
88 The speedup we get from using SSSE3 instruction is likely eaten away
89 by the indirect call in the PLT. */
90# define libc_hidden_builtin_def(name) \
91 .globl __GI_STRCPY; __GI_STRCPY = STRCPY_SSE2
92# undef libc_hidden_def
93# define libc_hidden_def(name) \
94 .globl __GI___STRCPY; __GI___STRCPY = STRCPY_SSE2
95#endif
96
97#ifndef USE_AS_STRNCPY
98#include "../strcpy.S"
99#endif
100