sysdeps/i386/i686/multiarch/bcopy.S

   1 /* Multiple versions of bcopy
   2    All versions must be listed in ifunc-impl-list.c.
   3    Copyright (C) 2010-2015 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 lib.  */
  25 #if IS_IN (libc)
  26 # ifdef SHARED
  27         .text
  28 ENTRY(bcopy)
  29         .type   bcopy, @gnu_indirect_function
  30         pushl   %ebx
  31         cfi_adjust_cfa_offset (4)
  32         cfi_rel_offset (ebx, 0)
  33         LOAD_PIC_REG(bx)
  34         cmpl    $0, KIND_OFFSET+__cpu_features@GOTOFF(%ebx)
  35         jne     1f
  36         call    __init_cpu_features
  37 1:      leal    __bcopy_ia32@GOTOFF(%ebx), %eax
  38         testl   $bit_SSE2, CPUID_OFFSET+index_SSE2+__cpu_features@GOTOFF(%ebx)
  39         jz      2f
  40         leal    __bcopy_sse2_unaligned@GOTOFF(%ebx), %eax
  41         testl   $bit_Fast_Unaligned_Load, FEATURE_OFFSET+index_Fast_Unaligned_Load+__cpu_features@GOTOFF(%ebx)
  42         jnz     2f
  43         testl   $bit_SSSE3, CPUID_OFFSET+index_SSSE3+__cpu_features@GOTOFF(%ebx)
  44         jz      2f
  45         leal    __bcopy_ssse3@GOTOFF(%ebx), %eax
  46         testl   $bit_Fast_Rep_String, FEATURE_OFFSET+index_Fast_Rep_String+__cpu_features@GOTOFF(%ebx)
  47         jz      2f
  48         leal    __bcopy_ssse3_rep@GOTOFF(%ebx), %eax
  49 2:      popl    %ebx
  50         cfi_adjust_cfa_offset (-4)
  51         cfi_restore (ebx)
  52         ret
  53 END(bcopy)
  54 # else
  55         .text
  56 ENTRY(bcopy)
  57         .type   bcopy, @gnu_indirect_function
  58         cmpl    $0, KIND_OFFSET+__cpu_features
  59         jne     1f
  60         call    __init_cpu_features
  61 1:      leal    __bcopy_ia32, %eax
  62         testl   $bit_SSSE3, CPUID_OFFSET+index_SSSE3+__cpu_features
  63         jz      2f
  64         leal    __bcopy_ssse3, %eax
  65         testl   $bit_Fast_Rep_String, FEATURE_OFFSET+index_Fast_Rep_String+__cpu_features
  66         jz      2f
  67         leal    __bcopy_ssse3_rep, %eax
  68 2:      ret
  69 END(bcopy)
  70 # endif
  71
  72 # undef ENTRY
  73 # define ENTRY(name) \
  74         .type __bcopy_ia32, @function; \
  75         .p2align 4; \
  76         .globl __bcopy_ia32; \
  77         .hidden __bcopy_ia32; \
  78         __bcopy_ia32: cfi_startproc; \
  79         CALL_MCOUNT
  80 # undef END
  81 # define END(name) \
  82         cfi_endproc; .size __bcopy_ia32, .-__bcopy_ia32
  83
  84 #endif
  85
  86 #include "../bcopy.S"