diff options
| author | Liubov Dmitrieva <liubov.dmitrieva@gmail.com> | 2011-07-19 17:11:54 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-07-19 17:11:54 -0400 |
| commit | 99710781cc47002612e609c7dc5f34692b64e9b3 (patch) | |
| tree | ac3c980ce57d0420fff758faffbd59d111026219 /sysdeps/x86_64/multiarch/strcat.S | |
| parent | 7dc6bd90c569c49807462b0740b18e32fab4d8b7 (diff) | |
| download | glibc-99710781cc47002612e609c7dc5f34692b64e9b3.tar.gz glibc-99710781cc47002612e609c7dc5f34692b64e9b3.tar.xz glibc-99710781cc47002612e609c7dc5f34692b64e9b3.zip | |
Improve 64 bit strcat functions with SSE2/SSSE3
Diffstat (limited to 'sysdeps/x86_64/multiarch/strcat.S')
| -rw-r--r-- | sysdeps/x86_64/multiarch/strcat.S | 85 |
1 files changed, 85 insertions, 0 deletions
diff --git a/sysdeps/x86_64/multiarch/strcat.S b/sysdeps/x86_64/multiarch/strcat.S new file mode 100644 index 0000000000..f3ccc8edc6 --- /dev/null +++ b/sysdeps/x86_64/multiarch/strcat.S @@ -0,0 +1,85 @@ +/* Multiple versions of strcat + Copyright (C) 2009, 2011 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <sysdep.h> +#include <init-arch.h> + +#ifndef USE_AS_STRNCAT +# ifndef STRCAT +# define STRCAT strcat +# endif +#endif + +#ifdef USE_AS_STRNCAT +# define STRCAT_SSSE3 __strncat_ssse3 +# define STRCAT_SSE2 __strncat_sse2 +# define STRCAT_SSE2_UNALIGNED __strncat_sse2_unaligned +# define __GI_STRCAT __GI_strncat +# define __GI___STRCAT __GI___strncat +#else +# define STRCAT_SSSE3 __strcat_ssse3 +# define STRCAT_SSE2 __strcat_sse2 +# define STRCAT_SSE2_UNALIGNED __strcat_sse2_unaligned +# define __GI_STRCAT __GI_strcat +# define __GI___STRCAT __GI___strcat +#endif + + +/* Define multiple versions only for the definition in libc. */ +#ifndef NOT_IN_libc + .text +ENTRY(STRCAT) + .type STRCAT, @gnu_indirect_function + cmpl $0, __cpu_features+KIND_OFFSET(%rip) + jne 1f + call __init_cpu_features +1: leaq STRCAT_SSE2_UNALIGNED(%rip), %rax + testl $bit_Fast_Unaligned_Load, __cpu_features+FEATURE_OFFSET+index_Fast_Unaligned_Load(%rip) + jnz 2f + leaq STRCAT_SSE2(%rip), %rax + testl $bit_SSSE3, __cpu_features+CPUID_OFFSET+index_SSSE3(%rip) + jz 2f + leaq STRCAT_SSSE3(%rip), %rax +2: ret +END(STRCAT) + +# undef ENTRY +# define ENTRY(name) \ + .type STRCAT_SSE2, @function; \ + .align 16; \ + STRCAT_SSE2: cfi_startproc; \ + CALL_MCOUNT +# undef END +# define END(name) \ + cfi_endproc; .size STRCAT_SSE2, .-STRCAT_SSE2 +# undef libc_hidden_builtin_def +/* It doesn't make sense to send libc-internal strcat 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_STRCAT; __GI_STRCAT = STRCAT_SSE2 +# undef libc_hidden_def +# define libc_hidden_def(name) \ + .globl __GI___STRCAT; __GI___STRCAT = STRCAT_SSE2 +#endif + +#ifndef USE_AS_STRNCAT +# include "../strcat.S" +#endif |