2009-07-03 09:48:56 +00:00
|
|
|
/* Multiple versions of strspn
|
|
|
|
|
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>
|
2009-12-13 17:47:02 +00:00
|
|
|
#include <init-arch.h>
|
2009-07-03 09:48:56 +00:00
|
|
|
|
|
|
|
|
/* Define multiple versions only for the definition in libc. */
|
|
|
|
|
#ifndef NOT_IN_libc
|
|
|
|
|
.text
|
|
|
|
|
ENTRY(strspn)
|
|
|
|
|
.type strspn, @gnu_indirect_function
|
|
|
|
|
cmpl $0, __cpu_features+KIND_OFFSET(%rip)
|
|
|
|
|
jne 1f
|
|
|
|
|
call __init_cpu_features
|
|
|
|
|
1: leaq __strspn_sse2(%rip), %rax
|
2009-12-13 17:47:02 +00:00
|
|
|
testl $bit_SSE4_2, __cpu_features+CPUID_OFFSET+index_SSE4_2(%rip)
|
2009-07-03 09:48:56 +00:00
|
|
|
jz 2f
|
|
|
|
|
leaq __strspn_sse42(%rip), %rax
|
|
|
|
|
2: ret
|
|
|
|
|
END(strspn)
|
|
|
|
|
|
|
|
|
|
# undef ENTRY
|
|
|
|
|
# define ENTRY(name) \
|
|
|
|
|
.type __strspn_sse2, @function; \
|
|
|
|
|
.globl __strspn_sse2; \
|
|
|
|
|
.align 16; \
|
|
|
|
|
__strspn_sse2: cfi_startproc; \
|
|
|
|
|
CALL_MCOUNT
|
|
|
|
|
# undef END
|
|
|
|
|
# define END(name) \
|
|
|
|
|
cfi_endproc; .size __strspn_sse2, .-__strspn_sse2
|
|
|
|
|
# undef libc_hidden_builtin_def
|
|
|
|
|
/* It doesn't make sense to send libc-internal strspn 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_strspn; __GI_strspn = __strspn_sse2
|
|
|
|
|
#endif
|
|
|
|
|
|
|
|
|
|
#endif /* HAVE_SSE4_SUPPORT */
|
|
|
|
|
|
|
|
|
|
#include "../strspn.S"
|
