home *** CD-ROM | disk | FTP | other *** search
- /*
- * 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
-
- #include <asm/mipsregs.h>
-
- 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,%1,1\n\t"
- "sb\t$1,(%0)\n\t"
- "bnez\t$1,1b\n\t"
- "addiu\t%0,%0,1\n\t"
- ".set\tat\n\t"
- ".set\treorder"
- : "=r" (dest), "=r" (src)
- : "0" (dest), "1" (src)
- : "$1","memory");
-
- return xdest;
- }
-
- 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;
- }
-
- 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,%0,1\n\t"
- "bne\t$1,%2,2f\n\t"
- "addiu\t%1,%1,1\n\t"
- "bnez\t%2,1b\n\t"
- "lbu\t%2,(%0)\n\t"
- STR(FILL_LDS) "\n\t"
- "move\t%2,$1\n"
- "2:\tsub\t%2,%2,$1\n"
- "3:\t.set\tat\n\t"
- ".set\treorder\n\t"
- : "=d" (cs), "=d" (ct), "=d" (__res)
- : "0" (cs), "1" (ct)
- : "$1");
-
- return __res;
- }
-
- 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"
- "addiu\t%2,%2,-1\n\t"
- "bne\t$1,%3,3f\n\t"
- "addiu\t%0,%0,1\n\t"
- "bnez\t%3,1b\n\t"
- "addiu\t%1,%1,1\n"
- "2:\tmove\t%3,$1\n"
- "3:\tsub\t%3,%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;
- }
-
- 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;
- }
-
- 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,%1,1\n\t"
- "sb\t$1,(%0)\n\t"
- "subu\t%2,%2,1\n\t"
- "bnez\t%2,1b\n\t"
- "addiu\t%0,%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;
- }
-
- 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,%1,1\n\t"
- "sb\t$1,(%0)\n\t"
- "subu\t%2,%2,1\n\t"
- "bnez\t%2,1b\n\t"
- "addiu\t%0,%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,%1,1\n\t"
- "sb\t$1,-1(%0)\n\t"
- "subu\t%2,%2,1\n\t"
- "bnez\t%2,1b\n\t"
- "subu\t%0,%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;
- }
-
- extern __inline__ void * memscan(void * addr, int c, size_t size)
- {
- if (!size)
- return addr;
- __asm__(".set\tnoreorder\n\t"
- ".set\tnoat\n"
- "1:\tbeq\t$0,%1,2f\n\t"
- "lbu\t$1,(%0)\n\t"
- "subu\t%1,%1,1\n\t"
- "bnez\t%1,1b\n\t"
- "addiu\t%0,%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 */
-