mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-10-31 00:01:35 +00:00
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_
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#define _M68K_STRING_H_
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#include <asm/setup.h>
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#include <asm/page.h>
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#define __HAVE_ARCH_STRCPY
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static inline char * strcpy(char * dest,const char *src)
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{
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char *xdest = dest;
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__asm__ __volatile__
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("1:\tmoveb %1@+,%0@+\n\t"
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"jne 1b"
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: "=a" (dest), "=a" (src)
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: "0" (dest), "1" (src) : "memory");
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return xdest;
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}
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#define __HAVE_ARCH_STRNCPY
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static inline char * strncpy(char *dest, const char *src, size_t n)
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{
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char *xdest = dest;
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if (n == 0)
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return xdest;
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__asm__ __volatile__
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("1:\tmoveb %1@+,%0@+\n\t"
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"jeq 2f\n\t"
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"subql #1,%2\n\t"
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"jne 1b\n\t"
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"2:"
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: "=a" (dest), "=a" (src), "=d" (n)
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: "0" (dest), "1" (src), "2" (n)
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: "memory");
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return xdest;
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}
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#define __HAVE_ARCH_STRCAT
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static inline char * strcat(char * dest, const char * src)
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{
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char *tmp = dest;
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while (*dest)
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dest++;
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while ((*dest++ = *src++))
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;
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return tmp;
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}
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#define __HAVE_ARCH_STRNCAT
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static inline char * strncat(char *dest, const char *src, size_t count)
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{
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char *tmp = dest;
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if (count) {
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while (*dest)
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dest++;
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while ((*dest++ = *src++)) {
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if (--count == 0) {
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*dest++='\0';
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break;
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}
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}
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}
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return tmp;
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}
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#define __HAVE_ARCH_STRCHR
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static inline char * strchr(const char * s, int c)
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{
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const char ch = c;
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for(; *s != ch; ++s)
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if (*s == '\0')
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return( NULL );
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return( (char *) s);
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}
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/* strstr !! */
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#define __HAVE_ARCH_STRLEN
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static inline size_t strlen(const char * s)
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{
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const char *sc;
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for (sc = s; *sc != '\0'; ++sc) ;
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return(sc - s);
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}
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/* strnlen !! */
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#define __HAVE_ARCH_STRCMP
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static inline int strcmp(const char * cs,const char * ct)
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{
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char __res;
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__asm__
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("1:\tmoveb %0@+,%2\n\t" /* get *cs */
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"cmpb %1@+,%2\n\t" /* compare a byte */
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"jne 2f\n\t" /* not equal, break out */
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"tstb %2\n\t" /* at end of cs? */
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"jne 1b\n\t" /* no, keep going */
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"jra 3f\n\t" /* strings are equal */
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"2:\tsubb %1@-,%2\n\t" /* *cs - *ct */
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"3:"
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: "=a" (cs), "=a" (ct), "=d" (__res)
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: "0" (cs), "1" (ct));
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return __res;
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}
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#define __HAVE_ARCH_STRNCMP
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static inline int strncmp(const char * cs,const char * ct,size_t count)
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{
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char __res;
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if (!count)
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return 0;
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__asm__
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("1:\tmovb %0@+,%3\n\t" /* get *cs */
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"cmpb %1@+,%3\n\t" /* compare a byte */
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"jne 3f\n\t" /* not equal, break out */
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"tstb %3\n\t" /* at end of cs? */
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"jeq 4f\n\t" /* yes, all done */
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"subql #1,%2\n\t" /* no, adjust count */
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"jne 1b\n\t" /* more to do, keep going */
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"2:\tmoveq #0,%3\n\t" /* strings are equal */
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"jra 4f\n\t"
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"3:\tsubb %1@-,%3\n\t" /* *cs - *ct */
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"4:"
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: "=a" (cs), "=a" (ct), "=d" (count), "=d" (__res)
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: "0" (cs), "1" (ct), "2" (count));
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return __res;
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}
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#define __HAVE_ARCH_MEMSET
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extern void *memset(void *, int, __kernel_size_t);
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#define memset(d, c, n) __builtin_memset(d, c, n)
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#define __HAVE_ARCH_MEMCPY
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extern void *memcpy(void *, const void *, __kernel_size_t);
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#define memcpy(d, s, n) __builtin_memcpy(d, s, n)
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#define __HAVE_ARCH_MEMMOVE
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extern void *memmove(void *, const void *, __kernel_size_t);
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#define __HAVE_ARCH_MEMCMP
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extern int memcmp(const void *, const void *, __kernel_size_t);
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#define memcmp(d, s, n) __builtin_memcmp(d, s, n)
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#endif /* _M68K_STRING_H_ */
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