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/*
* include/asm-mips/string.h
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (c) 1994, 1995 Waldorf Electronics
* written by Ralf Baechle
*/
#ifndef __ASM_MIPS_STRING_H
#define __ASM_MIPS_STRING_H
#define __HAVE_ARCH_STRCPY
extern __inline__ char * strcpy(char * dest, const char *src)
{
char *xdest = dest;
__asm__ __volatile__(
".set\tnoreorder\n\t"
".set\tnoat\n"
"1:\tlbu\t$1,(%1)\n\t"
"addiu\t%1,1\n\t"
"sb\t$1,(%0)\n\t"
"bnez\t$1,1b\n\t"
"addiu\t%0,1\n\t"
".set\tat\n\t"
".set\treorder"
: "=r" (dest), "=r" (src)
: "0" (dest), "1" (src)
: "$1","memory");
return xdest;
}
#define __HAVE_ARCH_STRNCPY
extern __inline__ char * strncpy(char *dest, const char *src, size_t n)
{
char *xdest = dest;
if (n == 0)
return xdest;
__asm__ __volatile__(
".set\tnoreorder\n\t"
".set\tnoat\n"
"1:\tlbu\t$1,(%1)\n\t"
"subu\t%2,%2,1\n\t"
"sb\t$1,(%0)\n\t"
"beqz\t$1,2f\n\t"
"addiu\t%0,%0,1\n\t"
"bnez\t%2,1b\n\t"
"addiu\t%1,%1,1\n"
"2:\n\t"
".set\tat\n\t"
".set\treorder\n\t"
: "=r" (dest), "=r" (src), "=r" (n)
: "0" (dest), "1" (src), "2" (n)
: "$1","memory");
return dest;
}
#define __HAVE_ARCH_STRCMP
extern __inline__ int strcmp(const char * cs, const char * ct)
{
int __res;
__asm__ __volatile__(
".set\tnoreorder\n\t"
".set\tnoat\n\t"
"lbu\t%2,(%0)\n"
"1:\tlbu\t$1,(%1)\n\t"
"addiu\t%0,1\n\t"
"bne\t$1,%2,2f\n\t"
"addiu\t%1,1\n\t"
"bnez\t%2,1b\n\t"
"lbu\t%2,(%0)\n\t"
#ifndef __R4000__
"nop\n\t"
#endif
"move\t%2,$1\n"
"2:\tsubu\t%2,$1\n"
"3:\t.set\tat\n\t"
".set\treorder"
: "=d" (cs), "=d" (ct), "=d" (__res)
: "0" (cs), "1" (ct)
: "$1");
return __res;
}
#define __HAVE_ARCH_STRNCMP
extern __inline__ int strncmp(const char * cs, const char * ct, size_t count)
{
char __res;
__asm__ __volatile__(
".set\tnoreorder\n\t"
".set\tnoat\n"
"1:\tlbu\t%3,(%0)\n\t"
"beqz\t%2,2f\n\t"
"lbu\t$1,(%1)\n\t"
"subu\t%2,1\n\t"
"bne\t$1,%3,3f\n\t"
"addiu\t%0,1\n\t"
"bnez\t%3,1b\n\t"
"addiu\t%1,1\n"
"2:\tmove\t%3,$1\n"
"3:\tsubu\t%3,$1\n\t"
".set\tat\n\t"
".set\treorder"
: "=d" (cs), "=d" (ct), "=d" (count), "=d" (__res)
: "0" (cs), "1" (ct), "2" (count)
: "$1");
return __res;
}
#define __HAVE_ARCH_MEMSET
extern __inline__ void * memset(void * s, int c, size_t count)
{
void *xs = s;
if (!count)
return xs;
__asm__ __volatile__(
".set\tnoreorder\n"
"1:\tsb\t%3,(%0)\n\t"
"bne\t%0,%1,1b\n\t"
"addiu\t%0,%0,1\n\t"
".set\treorder"
: "=r" (s), "=r" (count)
: "0" (s), "r" (c), "1" (s + count - 1)
: "memory");
return xs;
}
#define __HAVE_ARCH_MEMCPY
extern __inline__ void * memcpy(void * to, const void * from, size_t n)
{
void *xto = to;
if (!n)
return xto;
__asm__ __volatile__(
".set\tnoreorder\n\t"
".set\tnoat\n"
"1:\tlbu\t$1,(%1)\n\t"
"addiu\t%1,1\n\t"
"sb\t$1,(%0)\n\t"
"subu\t%2,1\n\t"
"bnez\t%2,1b\n\t"
"addiu\t%0,1\n\t"
".set\tat\n\t"
".set\treorder"
: "=r" (to), "=r" (from), "=r" (n)
: "0" (to), "1" (from), "2" (n)
: "$1","memory" );
return xto;
}
#define __HAVE_ARCH_MEMMOVE
extern __inline__ void * memmove(void * dest,const void * src, size_t n)
{
void *xdest = dest;
if (!n)
return xdest;
if (dest < src)
__asm__ __volatile__(
".set\tnoreorder\n\t"
".set\tnoat\n"
"1:\tlbu\t$1,(%1)\n\t"
"addiu\t%1,1\n\t"
"sb\t$1,(%0)\n\t"
"subu\t%2,1\n\t"
"bnez\t%2,1b\n\t"
"addiu\t%0,1\n\t"
".set\tat\n\t"
".set\treorder"
: "=r" (dest), "=r" (src), "=r" (n)
: "0" (dest), "1" (src), "2" (n)
: "$1","memory" );
else
__asm__ __volatile__(
".set\tnoreorder\n\t"
".set\tnoat\n"
"1:\tlbu\t$1,-1(%1)\n\t"
"subu\t%1,1\n\t"
"sb\t$1,-1(%0)\n\t"
"subu\t%2,1\n\t"
"bnez\t%2,1b\n\t"
"subu\t%0,1\n\t"
".set\tat\n\t"
".set\treorder"
: "=r" (dest), "=r" (src), "=r" (n)
: "0" (dest+n), "1" (src+n), "2" (n)
: "$1","memory" );
return xdest;
}
#define __HAVE_ARCH_MEMSCAN
extern __inline__ void * memscan(void * addr, int c, size_t size)
{
if (!size)
return addr;
__asm__(".set\tnoreorder\n\t"
".set\tnoat\n"
"1:\tbeqz\t%1,2f\n\t"
"lbu\t$1,(%0)\n\t"
"subu\t%1,1\n\t"
"bnez\t%1,1b\n\t"
"addiu\t%0,1\n\t"
".set\tat\n\t"
".set\treorder\n"
"2:"
: "=r" (addr), "=r" (size)
: "0" (addr), "1" (size), "r" (c)
: "$1");
return addr;
}
#endif /* __ASM_MIPS_STRING_H */
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