#ifndef _BLACKFIN_STRING_H_
#define _BLACKFIN_STRING_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:\t%2 = B [%1++] (Z);\n\t"
"B [%0++] = %2;\n\t"
"CC = %2;\n\t"
"if cc jump 1b (bp);\n"
: "+&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:\t%3 = B [%1++] (Z);\n\t"
"B [%0++] = %3;\n\t"
"CC = %3;\n\t"
"if ! cc jump 2f;\n\t"
"%2 += -1;\n\t"
"CC = %2 == 0;\n\t"
"if ! cc jump 1b (bp);\n"
"2:\n"
: "+&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)
{
char __res1, __res2;
__asm__
("1:\t%2 = B[%0++] (Z);\n\t" /* get *cs */
"%3 = B[%1++] (Z);\n\t" /* get *ct */
"CC = %2 == %3;\n\t" /* compare a byte */
"if ! cc jump 2f;\n\t" /* not equal, break out */
"CC = %2;\n\t" /* at end of cs? */
"if cc jump 1b (bp);\n\t" /* no, keep going */
"jump.s 3f;\n" /* strings are equal */
"2:\t%2 = %2 - %3;\n" /* *cs - *ct */
"3:\n"
: "+&a" (cs), "+&a" (ct), "=&d" (__res1), "=&d" (__res2)
: : "CC");
return __res1;
}
#define __HAVE_ARCH_STRNCMP
extern inline int strncmp(const char *cs, const char *ct, size_t count)
{
char __res1, __res2;
if (!count)
return 0;
__asm__
("1:\t%3 = B[%0++] (Z);\n\t" /* get *cs */
"%4 = B[%1++] (Z);\n\t" /* get *ct */
"CC = %3 == %4;\n\t" /* compare a byte */
"if ! cc jump 3f;\n\t" /* not equal, break out */
"CC = %3;\n\t" /* at end of cs? */
"if ! cc jump 4f;\n\t" /* yes, all done */
"%2 += -1;\n\t" /* no, adjust count */
"CC = %2 == 0;\n\t"
"if ! cc jump 1b;\n" /* more to do, keep going */
"2:\t%3 = 0;\n\t" /* strings are equal */
"jump.s 4f;\n"
"3:\t%3 = %3 - %4;\n" /* *cs - *ct */
"4:"
: "+&a" (cs), "+&a" (ct), "+&da" (count), "=&d" (__res1), "=&d" (__res2)
: : "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_ */
