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i386: Remove strrchr assembler implementation

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The constraints in the inline assembler implementation of i386
strrchr() were incorrect and break the build with recent gcc 4.3.
Since there are only very few callers of strrchr() and none of them
are performance relevant just remove the assembler implementation
and use the C fallback instead.

[ tglx: arch/x86 adaptation ]

Cc: rguenther@suse.de
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Andi Kleen 2007-10-17 18:04:38 +02:00 committed by Thomas Gleixner
parent 883001f982
commit 61d08a9ea3
2 changed files with 0 additions and 23 deletions
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20
arch/x86/lib/string_32.c
View File

@ -160,26 +160,6 @@ char *strchr(const char * s, int c)
EXPORT_SYMBOL(strchr);
#endif
#ifdef __HAVE_ARCH_STRRCHR
char *strrchr(const char * s, int c)
{
int d0, d1;
char * res;
asm volatile( "movb %%al,%%ah\n"
"1:\tlodsb\n\t"
"cmpb %%ah,%%al\n\t"
"jne 2f\n\t"
"leal -1(%%esi),%0\n"
"2:\ttestb %%al,%%al\n\t"
"jne 1b"
:"=g" (res), "=&S" (d0), "=&a" (d1)
:"0" (0),"1" (s),"2" (c)
:"memory");
return res;
}
EXPORT_SYMBOL(strrchr);
#endif
#ifdef __HAVE_ARCH_STRLEN
size_t strlen(const char * s)
{

3
include/asm-x86/string_32.h
View File

@ -26,9 +26,6 @@ extern int strncmp(const char *cs, const char *ct, size_t count);
#define __HAVE_ARCH_STRCHR
extern char *strchr(const char *s, int c);
#define __HAVE_ARCH_STRRCHR
extern char *strrchr(const char *s, int c);
#define __HAVE_ARCH_STRLEN
extern size_t strlen(const char *s);