#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_ */