sysdeps/x86_64/multiarch/wcscpy.S

   1 /* Multiple versions of wcscpy
   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 /* Define multiple versions only for the definition in libc. */
  25 #ifndef NOT_IN_libc
  26
  27         .text
  28 ENTRY(wcscpy)
  29         .type   wcscpy, @gnu_indirect_function
  30         cmpl    $0, KIND_OFFSET+__cpu_features(%rip)
  31         jne     1f
  32         call    __init_cpu_features
  33
  34 1:      testl   $bit_SSSE3, __cpu_features+CPUID_OFFSET+index_SSSE3(%rip)
  35         jnz     2f
  36         leaq    __wcscpy_sse2(%rip), %rax
  37         ret
  38
  39 2:      leaq    __wcscpy_ssse3(%rip), %rax
  40         ret
  41
  42 END(wcscpy)
  43 #endif