sysdeps/i386/i686/multiarch/strspn.S

   1 /* Multiple versions of strspn
   2    All versions must be listed in ifunc-impl-list.c.
   3    Copyright (C) 2009-2015 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 <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 #if IS_IN (libc)
  30 # ifdef SHARED
  31         .text
  32 ENTRY(strspn)
  33         .type   strspn, @gnu_indirect_function
  34         pushl   %ebx
  35         cfi_adjust_cfa_offset (4)
  36         cfi_rel_offset (ebx, 0)
  37         LOAD_PIC_REG(bx)
  38         cmpl    $0, KIND_OFFSET+__cpu_features@GOTOFF(%ebx)
  39         jne     1f
  40         call    __init_cpu_features
  41 1:      leal    __strspn_ia32@GOTOFF(%ebx), %eax
  42         testl   $bit_SSE4_2, CPUID_OFFSET+index_SSE4_2+__cpu_features@GOTOFF(%ebx)
  43         jz      2f
  44         leal    __strspn_sse42@GOTOFF(%ebx), %eax
  45 2:      popl    %ebx
  46         cfi_adjust_cfa_offset (-4);
  47         cfi_restore (ebx)
  48         ret
  49 END(strspn)
  50 # else
  51         .text
  52 ENTRY(strspn)
  53         .type   strspn, @gnu_indirect_function
  54         cmpl    $0, KIND_OFFSET+__cpu_features
  55         jne     1f
  56         call    __init_cpu_features
  57 1:      leal    __strspn_ia32, %eax
  58         testl   $bit_SSE4_2, CPUID_OFFSET+index_SSE4_2+__cpu_features
  59         jz      2f
  60         leal    __strspn_sse42, %eax
  61 2:      ret
  62 END(strspn)
  63 # endif
  64
  65 # undef ENTRY
  66 # define ENTRY(name) \
  67         .type __strspn_ia32, @function; \
  68         .globl __strspn_ia32; \
  69         .p2align 4; \
  70 __strspn_ia32: cfi_startproc; \
  71         CALL_MCOUNT
  72 # undef END
  73 # define END(name) \
  74         cfi_endproc; .size __strspn_ia32, .-__strspn_ia32
  75 # undef libc_hidden_builtin_def
  76 /* IFUNC doesn't work with the hidden functions in shared library since
  77    they will be called without setting up EBX needed for PLT which is
  78    used by IFUNC.  */
  79 # define libc_hidden_builtin_def(name) \
  80         .globl __GI_strspn; __GI_strspn = __strspn_ia32
  81 #endif
  82
  83 #endif /* HAVE_SSE4_SUPPORT */
  84
  85 #include "../../strspn.S"