sysdeps/i386/i686/multiarch/wcslen.S

   1 /* Multiple versions of wcslen
   2    All versions must be listed in ifunc-impl-list.c.
   3    Copyright (C) 2011-2014 Free Software Foundation, Inc.
   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
  18    License along with the GNU C Library; if not, see
  19    <http://www.gnu.org/licenses/>.  */
  20
  21 #include <sysdep.h>
  22 #include <init-arch.h>
  23
  24 #ifndef  NOT_IN_libc
  25         .text
  26 ENTRY(__wcslen)
  27         .type   __wcslen, @gnu_indirect_function
  28         pushl   %ebx
  29         cfi_adjust_cfa_offset (4)
  30         cfi_rel_offset (ebx, 0)
  31         LOAD_PIC_REG(bx)
  32         cmpl    $0, KIND_OFFSET+__cpu_features@GOTOFF(%ebx)
  33         jne     1f
  34         call    __init_cpu_features
  35 1:      leal    __wcslen_ia32@GOTOFF(%ebx), %eax
  36         testl   $bit_SSE2, CPUID_OFFSET+index_SSE2+__cpu_features@GOTOFF(%ebx)
  37         jz      2f
  38         leal    __wcslen_sse2@GOTOFF(%ebx), %eax
  39 2:      popl    %ebx
  40         cfi_adjust_cfa_offset (-4);
  41         cfi_restore (ebx)
  42         ret
  43 END(__wcslen)
  44
  45 weak_alias(__wcslen, wcslen)
  46 #endif