mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-15 06:55:13 +08:00
072dffda1d
Use the builtin functions for memset/memclr/memcpy, special optimizations for page operations have dedicated functions now. Uninline memmove/memchr and move all functions into a single file and clean it up a little. 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>
154 lines
3.5 KiB
C
154 lines
3.5 KiB
C
#ifndef _M68K_STRING_H_
|
|
#define _M68K_STRING_H_
|
|
|
|
#include <asm/setup.h>
|
|
#include <asm/page.h>
|
|
|
|
#define __HAVE_ARCH_STRCPY
|
|
static inline char * strcpy(char * dest,const char *src)
|
|
{
|
|
char *xdest = dest;
|
|
|
|
__asm__ __volatile__
|
|
("1:\tmoveb %1@+,%0@+\n\t"
|
|
"jne 1b"
|
|
: "=a" (dest), "=a" (src)
|
|
: "0" (dest), "1" (src) : "memory");
|
|
return xdest;
|
|
}
|
|
|
|
#define __HAVE_ARCH_STRNCPY
|
|
static inline char * strncpy(char *dest, const char *src, size_t n)
|
|
{
|
|
char *xdest = dest;
|
|
|
|
if (n == 0)
|
|
return xdest;
|
|
|
|
__asm__ __volatile__
|
|
("1:\tmoveb %1@+,%0@+\n\t"
|
|
"jeq 2f\n\t"
|
|
"subql #1,%2\n\t"
|
|
"jne 1b\n\t"
|
|
"2:"
|
|
: "=a" (dest), "=a" (src), "=d" (n)
|
|
: "0" (dest), "1" (src), "2" (n)
|
|
: "memory");
|
|
return xdest;
|
|
}
|
|
|
|
#define __HAVE_ARCH_STRCAT
|
|
static inline char * strcat(char * dest, const char * src)
|
|
{
|
|
char *tmp = dest;
|
|
|
|
while (*dest)
|
|
dest++;
|
|
while ((*dest++ = *src++))
|
|
;
|
|
|
|
return tmp;
|
|
}
|
|
|
|
#define __HAVE_ARCH_STRNCAT
|
|
static inline char * strncat(char *dest, const char *src, size_t count)
|
|
{
|
|
char *tmp = dest;
|
|
|
|
if (count) {
|
|
while (*dest)
|
|
dest++;
|
|
while ((*dest++ = *src++)) {
|
|
if (--count == 0) {
|
|
*dest++='\0';
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return tmp;
|
|
}
|
|
|
|
#define __HAVE_ARCH_STRCHR
|
|
static inline char * strchr(const char * s, int c)
|
|
{
|
|
const char ch = c;
|
|
|
|
for(; *s != ch; ++s)
|
|
if (*s == '\0')
|
|
return( NULL );
|
|
return( (char *) s);
|
|
}
|
|
|
|
/* strstr !! */
|
|
|
|
#define __HAVE_ARCH_STRLEN
|
|
static inline size_t strlen(const char * s)
|
|
{
|
|
const char *sc;
|
|
for (sc = s; *sc != '\0'; ++sc) ;
|
|
return(sc - s);
|
|
}
|
|
|
|
/* strnlen !! */
|
|
|
|
#define __HAVE_ARCH_STRCMP
|
|
static inline int strcmp(const char * cs,const char * ct)
|
|
{
|
|
char __res;
|
|
|
|
__asm__
|
|
("1:\tmoveb %0@+,%2\n\t" /* get *cs */
|
|
"cmpb %1@+,%2\n\t" /* compare a byte */
|
|
"jne 2f\n\t" /* not equal, break out */
|
|
"tstb %2\n\t" /* at end of cs? */
|
|
"jne 1b\n\t" /* no, keep going */
|
|
"jra 3f\n\t" /* strings are equal */
|
|
"2:\tsubb %1@-,%2\n\t" /* *cs - *ct */
|
|
"3:"
|
|
: "=a" (cs), "=a" (ct), "=d" (__res)
|
|
: "0" (cs), "1" (ct));
|
|
return __res;
|
|
}
|
|
|
|
#define __HAVE_ARCH_STRNCMP
|
|
static inline int strncmp(const char * cs,const char * ct,size_t count)
|
|
{
|
|
char __res;
|
|
|
|
if (!count)
|
|
return 0;
|
|
__asm__
|
|
("1:\tmovb %0@+,%3\n\t" /* get *cs */
|
|
"cmpb %1@+,%3\n\t" /* compare a byte */
|
|
"jne 3f\n\t" /* not equal, break out */
|
|
"tstb %3\n\t" /* at end of cs? */
|
|
"jeq 4f\n\t" /* yes, all done */
|
|
"subql #1,%2\n\t" /* no, adjust count */
|
|
"jne 1b\n\t" /* more to do, keep going */
|
|
"2:\tmoveq #0,%3\n\t" /* strings are equal */
|
|
"jra 4f\n\t"
|
|
"3:\tsubb %1@-,%3\n\t" /* *cs - *ct */
|
|
"4:"
|
|
: "=a" (cs), "=a" (ct), "=d" (count), "=d" (__res)
|
|
: "0" (cs), "1" (ct), "2" (count));
|
|
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 /* _M68K_STRING_H_ */
|