1/*
  2 * This file is subject to the terms and conditions of the GNU General Public
  3 * License.  See the file "COPYING" in the main directory of this archive
  4 * for more details.
  5 *
  6 * Copyright (c) 1994, 95, 96, 97, 98, 2000, 01 Ralf Baechle
  7 * Copyright (c) 2000 by Silicon Graphics, Inc.
  8 * Copyright (c) 2001 MIPS Technologies, Inc.
  9 */
 10#ifndef _ASM_STRING_H
 11#define _ASM_STRING_H
 12
 13
 14/*
 15 * Most of the inline functions are rather naive implementations so I just
 16 * didn't bother updating them for 64-bit ...
 17 */
 18#ifdef CONFIG_32BIT
 19
 20#ifndef IN_STRING_C
 21
 22#define __HAVE_ARCH_STRCPY
 23static __inline__ char *strcpy(char *__dest, __const__ char *__src)
 24{
 25  char *__xdest = __dest;
 26
 27  __asm__ __volatile__(
 28	".set\tnoreorder\n\t"
 29	".set\tnoat\n"
 30	"1:\tlbu\t$1,(%1)\n\t"
 31	"addiu\t%1,1\n\t"
 32	"sb\t$1,(%0)\n\t"
 33	"bnez\t$1,1b\n\t"
 34	"addiu\t%0,1\n\t"
 35	".set\tat\n\t"
 36	".set\treorder"
 37	: "=r" (__dest), "=r" (__src)
 38        : "0" (__dest), "1" (__src)
 39	: "memory");
 40
 41  return __xdest;
 42}
 43
 44#define __HAVE_ARCH_STRNCPY
 45static __inline__ char *strncpy(char *__dest, __const__ char *__src, size_t __n)
 46{
 47  char *__xdest = __dest;
 48
 49  if (__n == 0)
 50    return __xdest;
 51
 52  __asm__ __volatile__(
 53	".set\tnoreorder\n\t"
 54	".set\tnoat\n"
 55	"1:\tlbu\t$1,(%1)\n\t"
 56	"subu\t%2,1\n\t"
 57	"sb\t$1,(%0)\n\t"
 58	"beqz\t$1,2f\n\t"
 59	"addiu\t%0,1\n\t"
 60	"bnez\t%2,1b\n\t"
 61	"addiu\t%1,1\n"
 62	"2:\n\t"
 63	".set\tat\n\t"
 64	".set\treorder"
 65        : "=r" (__dest), "=r" (__src), "=r" (__n)
 66        : "0" (__dest), "1" (__src), "2" (__n)
 67        : "memory");
 68
 69  return __xdest;
 70}
 71
 72#define __HAVE_ARCH_STRCMP
 73static __inline__ int strcmp(__const__ char *__cs, __const__ char *__ct)
 74{
 75  int __res;
 76
 77  __asm__ __volatile__(
 78	".set\tnoreorder\n\t"
 79	".set\tnoat\n\t"
 80	"lbu\t%2,(%0)\n"
 81	"1:\tlbu\t$1,(%1)\n\t"
 82	"addiu\t%0,1\n\t"
 83	"bne\t$1,%2,2f\n\t"
 84	"addiu\t%1,1\n\t"
 85	"bnez\t%2,1b\n\t"
 86	"lbu\t%2,(%0)\n\t"
 87#if defined(CONFIG_CPU_R3000)
 88	"nop\n\t"
 89#endif
 90	"move\t%2,$1\n"
 91	"2:\tsubu\t%2,$1\n"
 92	"3:\t.set\tat\n\t"
 93	".set\treorder"
 94	: "=r" (__cs), "=r" (__ct), "=r" (__res)
 95	: "0" (__cs), "1" (__ct));
 96
 97  return __res;
 98}
 99
100#endif /* !defined(IN_STRING_C) */
101
102#define __HAVE_ARCH_STRNCMP
103static __inline__ int
104strncmp(__const__ char *__cs, __const__ char *__ct, size_t __count)
105{
106	int __res;
107
108	__asm__ __volatile__(
109	".set\tnoreorder\n\t"
110	".set\tnoat\n"
111	"1:\tlbu\t%3,(%0)\n\t"
112	"beqz\t%2,2f\n\t"
113	"lbu\t$1,(%1)\n\t"
114	"subu\t%2,1\n\t"
115	"bne\t$1,%3,3f\n\t"
116	"addiu\t%0,1\n\t"
117	"bnez\t%3,1b\n\t"
118	"addiu\t%1,1\n"
119	"2:\n\t"
120#if defined(CONFIG_CPU_R3000)
121	"nop\n\t"
122#endif
123	"move\t%3,$1\n"
124	"3:\tsubu\t%3,$1\n\t"
125	".set\tat\n\t"
126	".set\treorder"
127	: "=r" (__cs), "=r" (__ct), "=r" (__count), "=r" (__res)
128	: "0" (__cs), "1" (__ct), "2" (__count));
129
130	return __res;
131}
132#endif /* CONFIG_32BIT */
133
134#define __HAVE_ARCH_MEMSET
135extern void *memset(void *__s, int __c, size_t __count);
136
137#define __HAVE_ARCH_MEMCPY
138extern void *memcpy(void *__to, __const__ void *__from, size_t __n);
139
140#define __HAVE_ARCH_MEMMOVE
141extern void *memmove(void *__dest, __const__ void *__src, size_t __n);
142
143#endif /* _ASM_STRING_H */