forked from luck/tmp_suning_uos_patched
d6359fd783
- cleanup asm of string functions - deinline strncat()/strncmp() - provide non-inlined strcpy() Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
132 lines
2.7 KiB
C
132 lines
2.7 KiB
C
#ifndef _M68K_STRING_H_
|
|
#define _M68K_STRING_H_
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/compiler.h>
|
|
|
|
static inline size_t __kernel_strlen(const char *s)
|
|
{
|
|
const char *sc;
|
|
|
|
for (sc = s; *sc++; )
|
|
;
|
|
return sc - s - 1;
|
|
}
|
|
|
|
static inline char *__kernel_strcpy(char *dest, const char *src)
|
|
{
|
|
char *xdest = dest;
|
|
|
|
asm volatile ("\n"
|
|
"1: move.b (%1)+,(%0)+\n"
|
|
" jne 1b"
|
|
: "+a" (dest), "+a" (src)
|
|
: : "memory");
|
|
return xdest;
|
|
}
|
|
|
|
#ifndef __IN_STRING_C
|
|
|
|
#define __HAVE_ARCH_STRLEN
|
|
#define strlen(s) (__builtin_constant_p(s) ? \
|
|
__builtin_strlen(s) : \
|
|
__kernel_strlen(s))
|
|
|
|
#define __HAVE_ARCH_STRNLEN
|
|
static inline size_t strnlen(const char *s, size_t count)
|
|
{
|
|
const char *sc = s;
|
|
|
|
asm volatile ("\n"
|
|
"1: subq.l #1,%1\n"
|
|
" jcs 2f\n"
|
|
" tst.b (%0)+\n"
|
|
" jne 1b\n"
|
|
" subq.l #1,%0\n"
|
|
"2:"
|
|
: "+a" (sc), "+d" (count));
|
|
return sc - s;
|
|
}
|
|
|
|
#define __HAVE_ARCH_STRCPY
|
|
#if __GNUC__ >= 4
|
|
#define strcpy(d, s) (__builtin_constant_p(s) && \
|
|
__builtin_strlen(s) <= 32 ? \
|
|
__builtin_strcpy(d, s) : \
|
|
__kernel_strcpy(d, s))
|
|
#else
|
|
#define strcpy(d, s) __kernel_strcpy(d, s)
|
|
#endif
|
|
|
|
#define __HAVE_ARCH_STRNCPY
|
|
static inline char *strncpy(char *dest, const char *src, size_t n)
|
|
{
|
|
char *xdest = dest;
|
|
|
|
asm volatile ("\n"
|
|
" jra 2f\n"
|
|
"1: move.b (%1),(%0)+\n"
|
|
" jeq 2f\n"
|
|
" addq.l #1,%1\n"
|
|
"2: subq.l #1,%2\n"
|
|
" jcc 1b\n"
|
|
: "+a" (dest), "+a" (src), "+d" (n)
|
|
: : "memory");
|
|
return xdest;
|
|
}
|
|
|
|
#define __HAVE_ARCH_STRCAT
|
|
#define strcat(d, s) ({ \
|
|
char *__d = (d); \
|
|
strcpy(__d + strlen(__d), (s)); \
|
|
})
|
|
|
|
#define __HAVE_ARCH_STRCHR
|
|
static inline char *strchr(const char *s, int c)
|
|
{
|
|
char sc, ch = c;
|
|
|
|
for (; (sc = *s++) != ch; ) {
|
|
if (!sc)
|
|
return NULL;
|
|
}
|
|
return (char *)s - 1;
|
|
}
|
|
|
|
#define __HAVE_ARCH_STRCMP
|
|
static inline int strcmp(const char *cs, const char *ct)
|
|
{
|
|
char res;
|
|
|
|
asm ("\n"
|
|
"1: move.b (%0)+,%2\n" /* get *cs */
|
|
" cmp.b (%1)+,%2\n" /* compare a byte */
|
|
" jne 2f\n" /* not equal, break out */
|
|
" tst.b %2\n" /* at end of cs? */
|
|
" jne 1b\n" /* no, keep going */
|
|
" jra 3f\n" /* strings are equal */
|
|
"2: sub.b -(%1),%2\n" /* *cs - *ct */
|
|
"3:"
|
|
: "+a" (cs), "+a" (ct), "=d" (res));
|
|
return res;
|
|
}
|
|
|
|
#define __HAVE_ARCH_MEMSET
|
|
extern void *memset(void *, int, __kernel_size_t);
|
|
#define memset(d, c, n) __builtin_memset(d, c, n)
|
|
|
|
#define __HAVE_ARCH_MEMCPY
|
|
extern void *memcpy(void *, const void *, __kernel_size_t);
|
|
#define memcpy(d, s, n) __builtin_memcpy(d, s, n)
|
|
|
|
#define __HAVE_ARCH_MEMMOVE
|
|
extern void *memmove(void *, const void *, __kernel_size_t);
|
|
|
|
#define __HAVE_ARCH_MEMCMP
|
|
extern int memcmp(const void *, const void *, __kernel_size_t);
|
|
#define memcmp(d, s, n) __builtin_memcmp(d, s, n)
|
|
|
|
#endif
|
|
|
|
#endif /* _M68K_STRING_H_ */
|