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author | Liubov Dmitrieva <liubov.dmitrieva@gmail.com> | 2011-10-23 14:56:04 -0400 |
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committer | Ulrich Drepper <drepper@gmail.com> | 2011-10-23 14:56:04 -0400 |
commit | ce7dd29f2863820ba858fe06c2ff61417df40d75 (patch) | |
tree | 32b9c93de4777c2d8239d94d67b9257cfccf1745 /sysdeps/x86_64/multiarch/strnlen.S | |
parent | 6ddf460fa5f7f96e96134f962f4b2ba708b1095b (diff) | |
download | glibc-ce7dd29f2863820ba858fe06c2ff61417df40d75.tar.gz glibc-ce7dd29f2863820ba858fe06c2ff61417df40d75.tar.xz glibc-ce7dd29f2863820ba858fe06c2ff61417df40d75.zip |
Optimized strnlen and wcscmp for x86-64
Diffstat (limited to 'sysdeps/x86_64/multiarch/strnlen.S')
-rw-r--r-- | sysdeps/x86_64/multiarch/strnlen.S | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/sysdeps/x86_64/multiarch/strnlen.S b/sysdeps/x86_64/multiarch/strnlen.S new file mode 100644 index 0000000000..75c9adfbcf --- /dev/null +++ b/sysdeps/x86_64/multiarch/strnlen.S @@ -0,0 +1,55 @@ +/* multiple version of strnlen + Copyright (C) 2011 Free Software Foundation, Inc. + 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> + + +/* Define multiple versions only for the definition in libc. */ +#ifndef NOT_IN_libc + + .text +ENTRY(__strnlen) + .type __strnlen, @gnu_indirect_function + cmpl $0, __cpu_features+KIND_OFFSET(%rip) + jne 1f + call __init_cpu_features +1: leaq __strnlen_sse2(%rip), %rax + testl $bit_Slow_BSF, __cpu_features+FEATURE_OFFSET+index_Slow_BSF(%rip) + jz 2f + leaq __strnlen_sse2_no_bsf(%rip), %rax +2: ret +END(__strnlen) + +# undef ENTRY +# define ENTRY(name) \ + .type __strnlen_sse2, @function; \ + .align 16; \ + __strnlen_sse2: cfi_startproc; \ + CALL_MCOUNT +# undef END +# define END(name) \ + cfi_endproc; .size __strnlen_sse2, .-__strnlen_sse2 + +# undef libc_hidden_def +# define libc_hidden_def(name) \ + .globl __GI_strnlen; __GI_strnlen = __strnlen_sse2 +#endif + +#include "../strnlen.S" |