diff options
author | James Morris <jmorris@namei.org> | 2008-09-21 17:41:56 -0700 |
---|---|---|
committer | James Morris <jmorris@namei.org> | 2008-09-21 17:41:56 -0700 |
commit | ab2b49518e743962f71b94246855c44ee9cf52cc (patch) | |
tree | 26b260a350f0a0a0d19b558bf147b812e3a1564c /arch/blackfin/include/asm/string.h | |
parent | f058925b201357fba48d56cc9c1719ae274b2022 (diff) | |
parent | 72d31053f62c4bc464c2783974926969614a8649 (diff) |
Merge branch 'master' into next
Conflicts:
MAINTAINERS
Thanks for breaking my tree :-)
Signed-off-by: James Morris <jmorris@namei.org>
Diffstat (limited to 'arch/blackfin/include/asm/string.h')
-rw-r--r-- | arch/blackfin/include/asm/string.h | 137 |
1 files changed, 137 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/string.h b/arch/blackfin/include/asm/string.h new file mode 100644 index 00000000000..321f4d96e4a --- /dev/null +++ b/arch/blackfin/include/asm/string.h @@ -0,0 +1,137 @@ +#ifndef _BLACKFIN_STRING_H_ +#define _BLACKFIN_STRING_H_ + +#include <linux/types.h> + +#ifdef __KERNEL__ /* only set these up for kernel code */ + +#define __HAVE_ARCH_STRCPY +extern inline char *strcpy(char *dest, const char *src) +{ + char *xdest = dest; + char temp = 0; + + __asm__ __volatile__ ( + "1:" + "%2 = B [%1++] (Z);" + "B [%0++] = %2;" + "CC = %2;" + "if cc jump 1b (bp);" + : "+&a" (dest), "+&a" (src), "=&d" (temp) + : + : "memory", "CC"); + + return xdest; +} + +#define __HAVE_ARCH_STRNCPY +extern inline char *strncpy(char *dest, const char *src, size_t n) +{ + char *xdest = dest; + char temp = 0; + + if (n == 0) + return xdest; + + __asm__ __volatile__ ( + "1:" + "%3 = B [%1++] (Z);" + "B [%0++] = %3;" + "CC = %3;" + "if ! cc jump 2f;" + "%2 += -1;" + "CC = %2 == 0;" + "if ! cc jump 1b (bp);" + "jump 4f;" + "2:" + /* if src is shorter than n, we need to null pad bytes now */ + "%3 = 0;" + "3:" + "%2 += -1;" + "CC = %2 == 0;" + "if cc jump 4f;" + "B [%0++] = %3;" + "jump 3b;" + "4:" + : "+&a" (dest), "+&a" (src), "+&da" (n), "=&d" (temp) + : + : "memory", "CC"); + + return xdest; +} + +#define __HAVE_ARCH_STRCMP +extern inline int strcmp(const char *cs, const char *ct) +{ + /* need to use int's here so the char's in the assembly don't get + * sign extended incorrectly when we don't want them to be + */ + int __res1, __res2; + + __asm__ __volatile__ ( + "1:" + "%2 = B[%0++] (Z);" /* get *cs */ + "%3 = B[%1++] (Z);" /* get *ct */ + "CC = %2 == %3;" /* compare a byte */ + "if ! cc jump 2f;" /* not equal, break out */ + "CC = %2;" /* at end of cs? */ + "if cc jump 1b (bp);" /* no, keep going */ + "jump.s 3f;" /* strings are equal */ + "2:" + "%2 = %2 - %3;" /* *cs - *ct */ + "3:" + : "+&a" (cs), "+&a" (ct), "=&d" (__res1), "=&d" (__res2) + : + : "memory", "CC"); + + return __res1; +} + +#define __HAVE_ARCH_STRNCMP +extern inline int strncmp(const char *cs, const char *ct, size_t count) +{ + /* need to use int's here so the char's in the assembly don't get + * sign extended incorrectly when we don't want them to be + */ + int __res1, __res2; + + if (!count) + return 0; + + __asm__ __volatile__ ( + "1:" + "%3 = B[%0++] (Z);" /* get *cs */ + "%4 = B[%1++] (Z);" /* get *ct */ + "CC = %3 == %4;" /* compare a byte */ + "if ! cc jump 3f;" /* not equal, break out */ + "CC = %3;" /* at end of cs? */ + "if ! cc jump 4f;" /* yes, all done */ + "%2 += -1;" /* no, adjust count */ + "CC = %2 == 0;" + "if ! cc jump 1b;" /* more to do, keep going */ + "2:" + "%3 = 0;" /* strings are equal */ + "jump.s 4f;" + "3:" + "%3 = %3 - %4;" /* *cs - *ct */ + "4:" + : "+&a" (cs), "+&a" (ct), "+&da" (count), "=&d" (__res1), "=&d" (__res2) + : + : "memory", "CC"); + + return __res1; +} + +#define __HAVE_ARCH_MEMSET +extern void *memset(void *s, int c, size_t count); +#define __HAVE_ARCH_MEMCPY +extern void *memcpy(void *d, const void *s, size_t count); +#define __HAVE_ARCH_MEMCMP +extern int memcmp(const void *, const void *, __kernel_size_t); +#define __HAVE_ARCH_MEMCHR +extern void *memchr(const void *s, int c, size_t n); +#define __HAVE_ARCH_MEMMOVE +extern void *memmove(void *dest, const void *src, size_t count); + +#endif /*__KERNEL__*/ +#endif /* _BLACKFIN_STRING_H_ */ |