projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 8912479f | 1 | /* Multiple versions of strcpy |
| ac49ecaf | 2 | All versions must be listed in ifunc-impl-list.c. |
| d4697bc9 | 3 | Copyright (C) 2009-2014 Free Software Foundation, Inc. |
| ab6a873f L |
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 | |
| 59ba27a6 PE |
18 | License along with the GNU C Library; if not, see |
| 19 | <http://www.gnu.org/licenses/>. */ | |
| ab6a873f L |
20 | |
| 21 | #include <sysdep.h> | |
| 51ddd2c0 | 22 | #include <init-arch.h> |
| ab6a873f L |
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 | |
| 8912479f L |
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 | |
| ab6a873f | 37 | # else |
| 8912479f L |
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 | |
| ab6a873f L |
43 | # endif |
| 44 | #else | |
| 45 | # ifdef USE_AS_STRNCPY | |
| 8912479f L |
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 | |
| ab6a873f | 50 | # else |
| 8912479f L |
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 | |
| ab6a873f L |
55 | # endif |
| 56 | #endif | |
| 57 | ||
| ab6a873f L |
58 | |
| 59 | /* Define multiple versions only for the definition in libc. */ | |
| 60 | #ifndef NOT_IN_libc | |
| 61 | .text | |
| 62 | ENTRY(STRCPY) | |
| 63 | .type STRCPY, @gnu_indirect_function | |
| 64 | cmpl $0, __cpu_features+KIND_OFFSET(%rip) | |
| 65 | jne 1f | |
| 66 | call __init_cpu_features | |
| 8912479f L |
67 | 1: leaq STRCPY_SSE2_UNALIGNED(%rip), %rax |
| 68 | testl $bit_Fast_Unaligned_Load, __cpu_features+FEATURE_OFFSET+index_Fast_Unaligned_Load(%rip) | |
| 69 | jnz 2f | |
| 70 | leaq STRCPY_SSE2(%rip), %rax | |
| 51ddd2c0 | 71 | testl $bit_SSSE3, __cpu_features+CPUID_OFFSET+index_SSSE3(%rip) |
| d28797e4 UD |
72 | jz 2f |
| 73 | leaq STRCPY_SSSE3(%rip), %rax | |
| 74 | 2: ret | |
| ab6a873f L |
75 | END(STRCPY) |
| 76 | ||
| ab6a873f L |
77 | # undef ENTRY |
| 78 | # define ENTRY(name) \ | |
| 79 | .type STRCPY_SSE2, @function; \ | |
| d6485c98 | 80 | .align 16; \ |
| ac49ecaf L |
81 | .globl STRCPY_SSE2; \ |
| 82 | .hidden STRCPY_SSE2; \ | |
| ab6a873f L |
83 | STRCPY_SSE2: cfi_startproc; \ |
| 84 | CALL_MCOUNT | |
| 85 | # undef END | |
| 86 | # define END(name) \ | |
| 87 | cfi_endproc; .size STRCPY_SSE2, .-STRCPY_SSE2 | |
| 88 | # undef libc_hidden_builtin_def | |
| 89 | /* It doesn't make sense to send libc-internal strcpy calls through a PLT. | |
| 90 | The speedup we get from using SSSE3 instruction is likely eaten away | |
| 91 | by the indirect call in the PLT. */ | |
| 92 | # define libc_hidden_builtin_def(name) \ | |
| 93 | .globl __GI_STRCPY; __GI_STRCPY = STRCPY_SSE2 | |
| 94 | # undef libc_hidden_def | |
| 95 | # define libc_hidden_def(name) \ | |
| 96 | .globl __GI___STRCPY; __GI___STRCPY = STRCPY_SSE2 | |
| 97 | #endif | |
| 98 | ||
| 99 | #ifndef USE_AS_STRNCPY | |
| 100 | #include "../strcpy.S" | |
| 101 | #endif |