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Diffstat (limited to 'include/asm-mips/string.h')
| -rw-r--r-- | include/asm-mips/string.h | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/include/asm-mips/string.h b/include/asm-mips/string.h new file mode 100644 index 00000000000..b18345504f8 --- /dev/null +++ b/include/asm-mips/string.h @@ -0,0 +1,166 @@ +/* + * 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 */ |