136 строки
3.2 KiB
C
136 строки
3.2 KiB
C
#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:"
|
|
"%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_ */
|