diff options
Diffstat (limited to 'sysdeps/i386/i686/multiarch/strcspn.S')
| -rw-r--r-- | sysdeps/i386/i686/multiarch/strcspn.S | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/sysdeps/i386/i686/multiarch/strcspn.S b/sysdeps/i386/i686/multiarch/strcspn.S new file mode 100644 index 0000000000..f5ca092340 --- /dev/null +++ b/sysdeps/i386/i686/multiarch/strcspn.S @@ -0,0 +1,99 @@ +/* Multiple versions of strcspn + Copyright (C) 2009 Free Software Foundation, Inc. + Contributed by Intel Corporation. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include <config.h> + +#ifdef HAVE_SSE4_SUPPORT + +#include <sysdep.h> +#include <ifunc-defines.h> + +#ifdef USE_AS_STRPBRK +#define STRCSPN_SSE42 __strpbrk_sse42 +#define STRCSPN_IA32 __strpbrk_ia32 +#define __GI_STRCSPN __GI_strpbrk +#else +#ifndef STRCSPN +#define STRCSPN strcspn +#define STRCSPN_SSE42 __strcspn_sse42 +#define STRCSPN_IA32 __strcspn_ia32 +#define __GI_STRCSPN __GI_strcspn +#endif +#endif + +/* Define multiple versions only for the definition in libc. Don't + define multiple versions for strpbrk in static library since we + need strpbrk before the initialization happened. */ +#if (defined SHARED || !defined USE_AS_STRPBRK) && !defined NOT_IN_libc + .section .gnu.linkonce.t.__i686.get_pc_thunk.bx,"ax",@progbits + .globl __i686.get_pc_thunk.bx + .hidden __i686.get_pc_thunk.bx + .p2align 4 + .type __i686.get_pc_thunk.bx,@function +__i686.get_pc_thunk.bx: + movl (%esp), %ebx + ret + + .text +ENTRY(STRCSPN) + .type STRCSPN, @gnu_indirect_function + pushl %ebx + cfi_adjust_cfa_offset (4) + cfi_rel_offset (ebx, 0) + call __i686.get_pc_thunk.bx + addl $_GLOBAL_OFFSET_TABLE_, %ebx + cmpl $0, KIND_OFFSET+__cpu_features@GOTOFF(%ebx) + jne 1f + call __init_cpu_features +1: leal STRCSPN_IA32@GOTOFF(%ebx), %eax + testl $(1<<20), CPUID_OFFSET+COMMON_CPUID_INDEX_1*CPUID_SIZE+CPUID_ECX_OFFSET+__cpu_features@GOTOFF(%ebx) + jz 2f + leal STRCSPN_SSE42@GOTOFF(%ebx), %eax +2: popl %ebx + cfi_adjust_cfa_offset (-4); + cfi_restore (ebx) + ret +END(STRCSPN) + +# undef ENTRY +# define ENTRY(name) \ + .type STRCSPN_IA32, @function; \ + .globl STRCSPN_IA32; \ + .p2align 4; \ + STRCSPN_IA32: cfi_startproc; \ + CALL_MCOUNT +# undef END +# define END(name) \ + cfi_endproc; .size STRCSPN_IA32, .-STRCSPN_IA32 +# undef libc_hidden_builtin_def +/* It doesn't make sense to send libc-internal strcspn calls through a PLT. + The speedup we get from using SSE4.2 instruction is likely eaten away + by the indirect call in the PLT. */ +# define libc_hidden_builtin_def(name) \ + .globl __GI_STRCSPN; __GI_STRCSPN = STRCSPN_IA32 +#endif + +#endif /* HAVE_SSE4_SUPPORT */ + +#ifdef USE_AS_STRPBRK +#include "../../strpbrk.S" +#else +#include "../../strcspn.S" +#endif |