mirror of
https://github.com/torvalds/linux.git
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144 lines
3.0 KiB
C
144 lines
3.0 KiB
C
/*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file "COPYING" in the main directory of this archive
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* for more details.
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*
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* Copyright (c) 1994, 95, 96, 97, 98, 2000, 01 Ralf Baechle
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* Copyright (c) 2000 by Silicon Graphics, Inc.
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* Copyright (c) 2001 MIPS Technologies, Inc.
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*/
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#ifndef _ASM_STRING_H
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#define _ASM_STRING_H
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/*
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* Most of the inline functions are rather naive implementations so I just
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* didn't bother updating them for 64-bit ...
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*/
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#ifdef CONFIG_32BIT
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#ifndef IN_STRING_C
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#define __HAVE_ARCH_STRCPY
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static __inline__ char *strcpy(char *__dest, __const__ char *__src)
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{
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char *__xdest = __dest;
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__asm__ __volatile__(
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".set\tnoreorder\n\t"
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".set\tnoat\n"
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"1:\tlbu\t$1,(%1)\n\t"
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"addiu\t%1,1\n\t"
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"sb\t$1,(%0)\n\t"
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"bnez\t$1,1b\n\t"
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"addiu\t%0,1\n\t"
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".set\tat\n\t"
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".set\treorder"
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: "=r" (__dest), "=r" (__src)
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: "0" (__dest), "1" (__src)
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: "memory");
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return __xdest;
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}
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#define __HAVE_ARCH_STRNCPY
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static __inline__ char *strncpy(char *__dest, __const__ char *__src, size_t __n)
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{
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char *__xdest = __dest;
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if (__n == 0)
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return __xdest;
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__asm__ __volatile__(
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".set\tnoreorder\n\t"
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".set\tnoat\n"
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"1:\tlbu\t$1,(%1)\n\t"
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"subu\t%2,1\n\t"
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"sb\t$1,(%0)\n\t"
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"beqz\t$1,2f\n\t"
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"addiu\t%0,1\n\t"
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"bnez\t%2,1b\n\t"
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"addiu\t%1,1\n"
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"2:\n\t"
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".set\tat\n\t"
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".set\treorder"
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: "=r" (__dest), "=r" (__src), "=r" (__n)
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: "0" (__dest), "1" (__src), "2" (__n)
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: "memory");
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return __xdest;
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}
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#define __HAVE_ARCH_STRCMP
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static __inline__ int strcmp(__const__ char *__cs, __const__ char *__ct)
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{
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int __res;
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__asm__ __volatile__(
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".set\tnoreorder\n\t"
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".set\tnoat\n\t"
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"lbu\t%2,(%0)\n"
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"1:\tlbu\t$1,(%1)\n\t"
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"addiu\t%0,1\n\t"
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"bne\t$1,%2,2f\n\t"
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"addiu\t%1,1\n\t"
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"bnez\t%2,1b\n\t"
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"lbu\t%2,(%0)\n\t"
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#if defined(CONFIG_CPU_R3000)
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"nop\n\t"
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#endif
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"move\t%2,$1\n"
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"2:\tsubu\t%2,$1\n"
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"3:\t.set\tat\n\t"
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".set\treorder"
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: "=r" (__cs), "=r" (__ct), "=r" (__res)
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: "0" (__cs), "1" (__ct));
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return __res;
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}
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#endif /* !defined(IN_STRING_C) */
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#define __HAVE_ARCH_STRNCMP
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static __inline__ int
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strncmp(__const__ char *__cs, __const__ char *__ct, size_t __count)
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{
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int __res;
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__asm__ __volatile__(
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".set\tnoreorder\n\t"
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".set\tnoat\n"
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"1:\tlbu\t%3,(%0)\n\t"
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"beqz\t%2,2f\n\t"
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"lbu\t$1,(%1)\n\t"
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"subu\t%2,1\n\t"
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"bne\t$1,%3,3f\n\t"
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"addiu\t%0,1\n\t"
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"bnez\t%3,1b\n\t"
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"addiu\t%1,1\n"
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"2:\n\t"
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#if defined(CONFIG_CPU_R3000)
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"nop\n\t"
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#endif
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"move\t%3,$1\n"
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"3:\tsubu\t%3,$1\n\t"
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".set\tat\n\t"
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".set\treorder"
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: "=r" (__cs), "=r" (__ct), "=r" (__count), "=r" (__res)
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: "0" (__cs), "1" (__ct), "2" (__count));
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return __res;
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}
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#endif /* CONFIG_32BIT */
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#define __HAVE_ARCH_MEMSET
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extern void *memset(void *__s, int __c, size_t __count);
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#define __HAVE_ARCH_MEMCPY
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extern void *memcpy(void *__to, __const__ void *__from, size_t __n);
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#define __HAVE_ARCH_MEMMOVE
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extern void *memmove(void *__dest, __const__ void *__src, size_t __n);
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#endif /* _ASM_STRING_H */
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