diff options
Diffstat (limited to 'REORG.TODO/sysdeps/x86_64/multiarch/strcpy.S')
| -rw-r--r-- | REORG.TODO/sysdeps/x86_64/multiarch/strcpy.S | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/x86_64/multiarch/strcpy.S b/REORG.TODO/sysdeps/x86_64/multiarch/strcpy.S new file mode 100644 index 0000000000..77819ddc50 --- /dev/null +++ b/REORG.TODO/sysdeps/x86_64/multiarch/strcpy.S @@ -0,0 +1,99 @@ +/* Multiple versions of strcpy + All versions must be listed in ifunc-impl-list.c. + Copyright (C) 2009-2017 Free Software Foundation, Inc. + Contributed by Intel Corporation. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> +#include <init-arch.h> + +#if !defined (USE_AS_STPCPY) && !defined (USE_AS_STRNCPY) +# ifndef STRCPY +# define STRCPY strcpy +# endif +#endif + +#ifdef USE_AS_STPCPY +# ifdef USE_AS_STRNCPY +# define STRCPY_SSSE3 __stpncpy_ssse3 +# define STRCPY_SSE2 __stpncpy_sse2 +# define STRCPY_SSE2_UNALIGNED __stpncpy_sse2_unaligned +# define __GI_STRCPY __GI_stpncpy +# define __GI___STRCPY __GI___stpncpy +# else +# define STRCPY_SSSE3 __stpcpy_ssse3 +# define STRCPY_SSE2 __stpcpy_sse2 +# define STRCPY_SSE2_UNALIGNED __stpcpy_sse2_unaligned +# define __GI_STRCPY __GI_stpcpy +# define __GI___STRCPY __GI___stpcpy +# endif +#else +# ifdef USE_AS_STRNCPY +# define STRCPY_SSSE3 __strncpy_ssse3 +# define STRCPY_SSE2 __strncpy_sse2 +# define STRCPY_SSE2_UNALIGNED __strncpy_sse2_unaligned +# define __GI_STRCPY __GI_strncpy +# else +# define STRCPY_SSSE3 __strcpy_ssse3 +# define STRCPY_SSE2 __strcpy_sse2 +# define STRCPY_SSE2_UNALIGNED __strcpy_sse2_unaligned +# define __GI_STRCPY __GI_strcpy +# endif +#endif + + +/* Define multiple versions only for the definition in libc. */ +#if IS_IN (libc) + .text +ENTRY(STRCPY) + .type STRCPY, @gnu_indirect_function + LOAD_RTLD_GLOBAL_RO_RDX + leaq STRCPY_SSE2_UNALIGNED(%rip), %rax + HAS_ARCH_FEATURE (Fast_Unaligned_Load) + jnz 2f + leaq STRCPY_SSE2(%rip), %rax + HAS_CPU_FEATURE (SSSE3) + jz 2f + leaq STRCPY_SSSE3(%rip), %rax +2: ret +END(STRCPY) + +# undef ENTRY +# define ENTRY(name) \ + .type STRCPY_SSE2, @function; \ + .align 16; \ + .globl STRCPY_SSE2; \ + .hidden STRCPY_SSE2; \ + STRCPY_SSE2: cfi_startproc; \ + CALL_MCOUNT +# undef END +# define END(name) \ + cfi_endproc; .size STRCPY_SSE2, .-STRCPY_SSE2 +# undef libc_hidden_builtin_def +/* It doesn't make sense to send libc-internal strcpy calls through a PLT. + The speedup we get from using SSSE3 instruction is likely eaten away + by the indirect call in the PLT. */ +# define libc_hidden_builtin_def(name) \ + .globl __GI_STRCPY; __GI_STRCPY = STRCPY_SSE2 +# undef libc_hidden_def +# define libc_hidden_def(name) \ + .globl __GI___STRCPY; __GI___STRCPY = STRCPY_SSE2 +#endif + +#ifndef USE_AS_STRNCPY +#include "../strcpy.S" +#endif |