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| author | Liubov Dmitrieva <liubov.dmitrieva@gmail.com> | 2011-10-23 15:17:23 -0400 |
|---|---|---|
| committer | Ulrich Drepper <drepper@gmail.com> | 2011-10-23 15:17:23 -0400 |
| commit | fc2ee42abe595bbf6b8bbf0637648ad8b5d4faab (patch) | |
| tree | d8083a4d8e42366a82963d3525140c53fbb49ede /sysdeps/i386/i686/multiarch/strnlen.S | |
| parent | 09229f3e1b617d9dcfa3227f32bb72436d7fcac4 (diff) | |
| download | glibc-fc2ee42abe595bbf6b8bbf0637648ad8b5d4faab.tar.gz glibc-fc2ee42abe595bbf6b8bbf0637648ad8b5d4faab.tar.xz glibc-fc2ee42abe595bbf6b8bbf0637648ad8b5d4faab.zip | |
Add optimized wcslen and strnlen for x86-32
Diffstat (limited to 'sysdeps/i386/i686/multiarch/strnlen.S')
| -rw-r--r-- | sysdeps/i386/i686/multiarch/strnlen.S | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/sysdeps/i386/i686/multiarch/strnlen.S b/sysdeps/i386/i686/multiarch/strnlen.S new file mode 100644 index 0000000000..7e542d9b7c --- /dev/null +++ b/sysdeps/i386/i686/multiarch/strnlen.S @@ -0,0 +1,56 @@ +/* Multiple versions of strnlen + Copyright (C) 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 NOT_IN_libc + .section .gnu.linkonce.t.__i686.get_pc_thunk.bx,"ax",@progbits + .globl __i686.get_pc_thunk.bx + .hidden __i686.get_pc_thunk.bx + .p2align 4 + .type __i686.get_pc_thunk.bx,@function +__i686.get_pc_thunk.bx: + movl (%esp), %ebx + ret + + .text +ENTRY(__strnlen) + .type __strnlen, @gnu_indirect_function + pushl %ebx + cfi_adjust_cfa_offset (4) + cfi_rel_offset (ebx, 0) + call __i686.get_pc_thunk.bx + addl $_GLOBAL_OFFSET_TABLE_, %ebx + cmpl $0, KIND_OFFSET+__cpu_features@GOTOFF(%ebx) + jne 1f + call __init_cpu_features +1: leal __strnlen_ia32@GOTOFF(%ebx), %eax + testl $bit_SSE2, CPUID_OFFSET+index_SSE2+__cpu_features@GOTOFF(%ebx) + jz 2f + leal __strnlen_sse2@GOTOFF(%ebx), %eax +2: popl %ebx + cfi_adjust_cfa_offset (-4); + cfi_restore (ebx) + ret +END(__strnlen) + +weak_alias(__strnlen, strnlen) +#endif |