/* * 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, 95, 96, 97, 98, 2000, 01 Ralf Baechle * Copyright (c) 2000 by Silicon Graphics, Inc. * Copyright (c) 2001 MIPS Technologies, Inc. */ #ifndef _ASM_STRING_H #define _ASM_STRING_H #include <linux/config.h> /* * Most of the inline functions are rather naive implementations so I just * didn't bother updating them for 64-bit ... */ #ifdef CONFIG_MIPS32 #ifndef IN_STRING_C #define __HAVE_ARCH_STRCPY static __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) : "memory"); return __xdest; } #define __HAVE_ARCH_STRNCPY static __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) : "memory"); return __xdest; } #define __HAVE_ARCH_STRCMP static __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 defined(CONFIG_CPU_R3000) "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)); return __res; } #endif /* !defined(IN_STRING_C) */ #define __HAVE_ARCH_STRNCMP static __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:\n\t" #if defined(CONFIG_CPU_R3000) "nop\n\t" #endif "move\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)); return __res; } #endif /* CONFIG_MIPS32 */ #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); #ifdef CONFIG_MIPS32 #define __HAVE_ARCH_MEMSCAN static __inline__ void *memscan(void *__addr, int __c, size_t __size) { char *__end = (char *)__addr + __size; unsigned char __uc = (unsigned char) __c; __asm__(".set\tpush\n\t" ".set\tnoat\n\t" ".set\treorder\n\t" "1:\tbeq\t%0,%1,2f\n\t" "addiu\t%0,1\n\t" "lbu\t$1,-1(%0)\n\t" "bne\t$1,%z4,1b\n" "2:\t.set\tpop" : "=r" (__addr), "=r" (__end) : "0" (__addr), "1" (__end), "Jr" (__uc)); return __addr; } #endif /* CONFIG_MIPS32 */ #endif /* _ASM_STRING_H */