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[POWERPC] Add memchr() to the bootwrapper 

This adds a memchr() implementation to the bootwrapper, which will
be needed when libfdt is merged in.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
David Gibson 2007-10-12 12:36:20 +10:00 committed by Paul Mackerras
parent d0c3d534a4
commit 9b4b8feb96
2 changed files with 14 additions and 0 deletions
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13
arch/powerpc/boot/string.S
View File

@ -219,6 +219,19 @@ backwards_memcpy:
mtctr r7
b 1b
.globl memchr
memchr:
cmpwi 0,r5,0
blelr
mtctr r5
addi r3,r3,-1
1: lbzu r0,1(r3)
cmpw r0,r4
beqlr
bdnz 1b
li r3,0
blr
.globl memcmp
memcmp:
cmpwi 0,r5,0

1
arch/powerpc/boot/string.h
View File

@ -14,6 +14,7 @@ extern size_t strnlen(const char *s, size_t count);
extern void *memset(void *s, int c, size_t n);
extern void *memmove(void *dest, const void *src, unsigned long n);
extern void *memcpy(void *dest, const void *src, unsigned long n);
extern void *memchr(const void *s, int c, size_t n);
extern int memcmp(const void *s1, const void *s2, size_t n);
#endif /* _PPC_BOOT_STRING_H_ */