WIP FPC-III support
[linux/fpc-iii.git] / arch / xtensa / include / asm / string.h
blob89b51a0c752f4bea189afd349a73a6eb10e86de8
1 /*
2 * include/asm-xtensa/string.h
4 * These trivial string functions are considered part of the public domain.
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
8 * for more details.
10 * Copyright (C) 2001 - 2005 Tensilica Inc.
13 /* We should optimize these. See arch/xtensa/lib/strncpy_user.S */
15 #ifndef _XTENSA_STRING_H
16 #define _XTENSA_STRING_H
18 #define __HAVE_ARCH_STRCPY
19 static inline char *strcpy(char *__dest, const char *__src)
21 register char *__xdest = __dest;
22 unsigned long __dummy;
24 __asm__ __volatile__("1:\n\t"
25 "l8ui %2, %1, 0\n\t"
26 "s8i %2, %0, 0\n\t"
27 "addi %1, %1, 1\n\t"
28 "addi %0, %0, 1\n\t"
29 "bnez %2, 1b\n\t"
30 : "=r" (__dest), "=r" (__src), "=&r" (__dummy)
31 : "0" (__dest), "1" (__src)
32 : "memory");
34 return __xdest;
37 #define __HAVE_ARCH_STRNCPY
38 static inline char *strncpy(char *__dest, const char *__src, size_t __n)
40 register char *__xdest = __dest;
41 unsigned long __dummy;
43 if (__n == 0)
44 return __xdest;
46 __asm__ __volatile__(
47 "1:\n\t"
48 "l8ui %2, %1, 0\n\t"
49 "s8i %2, %0, 0\n\t"
50 "addi %1, %1, 1\n\t"
51 "addi %0, %0, 1\n\t"
52 "beqz %2, 2f\n\t"
53 "bne %1, %5, 1b\n"
54 "2:"
55 : "=r" (__dest), "=r" (__src), "=&r" (__dummy)
56 : "0" (__dest), "1" (__src), "r" ((uintptr_t)__src+__n)
57 : "memory");
59 return __xdest;
62 #define __HAVE_ARCH_STRCMP
63 static inline int strcmp(const char *__cs, const char *__ct)
65 register int __res;
66 unsigned long __dummy;
68 __asm__ __volatile__(
69 "1:\n\t"
70 "l8ui %3, %1, 0\n\t"
71 "addi %1, %1, 1\n\t"
72 "l8ui %2, %0, 0\n\t"
73 "addi %0, %0, 1\n\t"
74 "beqz %2, 2f\n\t"
75 "beq %2, %3, 1b\n"
76 "2:\n\t"
77 "sub %2, %2, %3"
78 : "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&r" (__dummy)
79 : "0" (__cs), "1" (__ct));
81 return __res;
84 #define __HAVE_ARCH_STRNCMP
85 static inline int strncmp(const char *__cs, const char *__ct, size_t __n)
87 register int __res;
88 unsigned long __dummy;
90 __asm__ __volatile__(
91 "mov %2, %3\n"
92 "1:\n\t"
93 "beq %0, %6, 2f\n\t"
94 "l8ui %3, %1, 0\n\t"
95 "addi %1, %1, 1\n\t"
96 "l8ui %2, %0, 0\n\t"
97 "addi %0, %0, 1\n\t"
98 "beqz %2, 2f\n\t"
99 "beqz %3, 2f\n\t"
100 "beq %2, %3, 1b\n"
101 "2:\n\t"
102 "sub %2, %2, %3"
103 : "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&r" (__dummy)
104 : "0" (__cs), "1" (__ct), "r" ((uintptr_t)__cs+__n));
106 return __res;
109 #define __HAVE_ARCH_MEMSET
110 extern void *memset(void *__s, int __c, size_t __count);
111 extern void *__memset(void *__s, int __c, size_t __count);
113 #define __HAVE_ARCH_MEMCPY
114 extern void *memcpy(void *__to, __const__ void *__from, size_t __n);
115 extern void *__memcpy(void *__to, __const__ void *__from, size_t __n);
117 #define __HAVE_ARCH_MEMMOVE
118 extern void *memmove(void *__dest, __const__ void *__src, size_t __n);
119 extern void *__memmove(void *__dest, __const__ void *__src, size_t __n);
121 /* Don't build bcopy at all ... */
122 #define __HAVE_ARCH_BCOPY
124 #if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
127 * For files that are not instrumented (e.g. mm/slub.c) we
128 * should use not instrumented version of mem* functions.
131 #define memcpy(dst, src, len) __memcpy(dst, src, len)
132 #define memmove(dst, src, len) __memmove(dst, src, len)
133 #define memset(s, c, n) __memset(s, c, n)
135 #ifndef __NO_FORTIFY
136 #define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */
137 #endif
138 #endif
140 #endif /* _XTENSA_STRING_H */