home *** CD-ROM | disk | FTP | other *** search
- /* $Id: string.h,v 1.6 1998/07/20 17:52:21 ralf Exp $
- *
- * 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, 1996, 1997, 1998 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%2,1\n\t"
- "sb\t$1,(%0)\n\t"
- "beqz\t$1,2f\n\t"
- "addiu\t%0,1\n\t"
- "bnez\t%2,1b\n\t"
- "addiu\t%1,1\n"
- "2:\n\t"
- ".set\tat\n\t"
- ".set\treorder"
- : "=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"
- #if _MIPS_ISA == _MIPS_ISA_MIPS1
- "nop\n\t"
- #endif
- "move\t%2,$1\n"
- "2:\tsubu\t%2,$1\n"
- "3:\t.set\tat\n\t"
- ".set\treorder"
- : "=r" (__cs), "=r" (__ct), "=r" (__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)
- {
- int __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"
- : "=r" (__cs), "=r" (__ct), "=r" (__count), "=r" (__res)
- : "0" (__cs), "1" (__ct), "2" (__count)
- : "$1");
-
- return __res;
- }
-
- #define __HAVE_ARCH_MEMSET
- extern void *memset(void *__s, int __c, size_t __count);
-
- #define __HAVE_ARCH_MEMCPY
- extern void *memcpy(void *__to, __const__ void *__from, size_t __n);
-
- #define __HAVE_ARCH_MEMMOVE
- extern void *memmove(void *__dest, __const__ void *__src, size_t __n);
-
- /* Don't build bcopy at all ... */
- #define __HAVE_ARCH_BCOPY
-
- #define __HAVE_ARCH_MEMSCAN
- extern __inline__ void *memscan(void *__addr, int __c, size_t __size)
- {
- char *__end = (char *)__addr + __size;
-
- __asm__(".set\tnoat\n"
- "1:\tbeq\t%0,%1,2f\n\t"
- "addiu\t%0,1\n\t"
- "lb\t$1,-1(%0)\n\t"
- "bne\t$1,%4,1b\n"
- "2:\t.set\tat"
- : "=r" (__addr), "=r" (__end)
- : "0" (__addr), "1" (__end), "r" (__c)
- : "$1");
-
- return __addr;
- }
-
- #endif /* __ASM_MIPS_STRING_H */
-