sysdeps/i386/i686/multiarch/strspn.S

   1 /* Multiple versions of strspn
   2    Copyright (C) 2009 Free Software Foundation, Inc.
   3    Contributed by Intel Corporation.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, write to the Free
  18    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  19    02111-1307 USA.  */
  20
  21 #include <config.h>
  22
  23 #ifdef HAVE_SSE4_SUPPORT
  24
  25 #include <sysdep.h>
  26 #include <init-arch.h>
  27
  28 /* Define multiple versions only for the definition in libc.  */
  29 #ifndef NOT_IN_libc
  30 # ifdef SHARED
  31         .section        .gnu.linkonce.t.__i686.get_pc_thunk.bx,"ax",@progbits
  32         .globl  __i686.get_pc_thunk.bx
  33         .hidden __i686.get_pc_thunk.bx
  34         .p2align 4
  35         .type   __i686.get_pc_thunk.bx,@function
  36 __i686.get_pc_thunk.bx:
  37         movl    (%esp), %ebx
  38         ret
  39
  40         .text
  41 ENTRY(strspn)
  42         .type   strspn, @gnu_indirect_function
  43         pushl   %ebx
  44         cfi_adjust_cfa_offset (4)
  45         cfi_rel_offset (ebx, 0)
  46         call    __i686.get_pc_thunk.bx
  47         addl    $_GLOBAL_OFFSET_TABLE_, %ebx
  48         cmpl    $0, KIND_OFFSET+__cpu_features@GOTOFF(%ebx)
  49         jne     1f
  50         call    __init_cpu_features
  51 1:      leal    __strspn_ia32@GOTOFF(%ebx), %eax
  52         testl   $bit_SSE4_2, CPUID_OFFSET+index_SSE4_2+__cpu_features@GOTOFF(%ebx)
  53         jz      2f
  54         leal    __strspn_sse42@GOTOFF(%ebx), %eax
  55 2:      popl    %ebx
  56         cfi_adjust_cfa_offset (-4);
  57         cfi_restore (ebx)
  58         ret
  59 END(strspn)
  60 # else
  61         .text
  62 ENTRY(strspn)
  63         .type   strspn, @gnu_indirect_function
  64         cmpl    $0, KIND_OFFSET+__cpu_features
  65         jne     1f
  66         call    __init_cpu_features
  67 1:      leal    __strspn_ia32, %eax
  68         testl   $index_SSE2, CPUID_OFFSET+index_SSE4_2+__cpu_features
  69         jz      2f
  70         leal    __strspn_sse42, %eax
  71 2:      ret
  72 END(strspn)
  73 # endif
  74
  75 # undef ENTRY
  76 # define ENTRY(name) \
  77         .type __strspn_ia32, @function; \
  78         .globl __strspn_ia32; \
  79         .p2align 4
  80         __strspn_ia32: cfi_startproc; \
  81         CALL_MCOUNT
  82 # undef END
  83 # define END(name) \
  84         cfi_endproc; .size __strspn_ia32, .-__strspn_ia32
  85 # undef libc_hidden_builtin_def
  86 /* IFUNC doesn't work with the hidden functions in shared library since
  87    they will be called without setting up EBX needed for PLT which is
  88    used by IFUNC.  */
  89 # define libc_hidden_builtin_def(name) \
  90         .globl __GI_strspn; __GI_strspn = __strspn_ia32
  91 #endif
  92
  93 #endif /* HAVE_SSE4_SUPPORT */
  94
  95 #include "../../strspn.S"