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9a8fd558 CZ |
1 | /* |
2 | * include/asm-xtensa/string.h | |
3 | * | |
4 | * These trivial string functions are considered part of the public domain. | |
5 | * | |
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. | |
9 | * | |
10 | * Copyright (C) 2001 - 2005 Tensilica Inc. | |
11 | */ | |
12 | ||
13 | /* We should optimize these. See arch/xtensa/lib/strncpy_user.S */ | |
14 | ||
15 | #ifndef _XTENSA_STRING_H | |
16 | #define _XTENSA_STRING_H | |
17 | ||
18 | #define __HAVE_ARCH_STRCPY | |
d99cf715 | 19 | static inline char *strcpy(char *__dest, const char *__src) |
9a8fd558 CZ |
20 | { |
21 | register char *__xdest = __dest; | |
22 | unsigned long __dummy; | |
23 | ||
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"); | |
33 | ||
34 | return __xdest; | |
35 | } | |
36 | ||
37 | #define __HAVE_ARCH_STRNCPY | |
d99cf715 | 38 | static inline char *strncpy(char *__dest, const char *__src, size_t __n) |
9a8fd558 CZ |
39 | { |
40 | register char *__xdest = __dest; | |
41 | unsigned long __dummy; | |
42 | ||
43 | if (__n == 0) | |
44 | return __xdest; | |
45 | ||
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" (__src+__n) | |
57 | : "memory"); | |
58 | ||
59 | return __xdest; | |
60 | } | |
61 | ||
62 | #define __HAVE_ARCH_STRCMP | |
d99cf715 | 63 | static inline int strcmp(const char *__cs, const char *__ct) |
9a8fd558 CZ |
64 | { |
65 | register int __res; | |
66 | unsigned long __dummy; | |
67 | ||
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" | |
c5a285bb | 77 | "sub %2, %2, %3" |
9a8fd558 CZ |
78 | : "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&r" (__dummy) |
79 | : "0" (__cs), "1" (__ct)); | |
80 | ||
81 | return __res; | |
82 | } | |
83 | ||
84 | #define __HAVE_ARCH_STRNCMP | |
d99cf715 | 85 | static inline int strncmp(const char *__cs, const char *__ct, size_t __n) |
9a8fd558 CZ |
86 | { |
87 | register int __res; | |
88 | unsigned long __dummy; | |
89 | ||
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" | |
c5a285bb | 102 | "sub %2, %2, %3" |
9a8fd558 CZ |
103 | : "=r" (__cs), "=r" (__ct), "=&r" (__res), "=&r" (__dummy) |
104 | : "0" (__cs), "1" (__ct), "r" (__cs+__n)); | |
105 | ||
106 | return __res; | |
107 | } | |
108 | ||
109 | #define __HAVE_ARCH_MEMSET | |
110 | extern void *memset(void *__s, int __c, size_t __count); | |
111 | ||
112 | #define __HAVE_ARCH_MEMCPY | |
113 | extern void *memcpy(void *__to, __const__ void *__from, size_t __n); | |
114 | ||
115 | #define __HAVE_ARCH_MEMMOVE | |
116 | extern void *memmove(void *__dest, __const__ void *__src, size_t __n); | |
117 | ||
118 | /* Don't build bcopy at all ... */ | |
119 | #define __HAVE_ARCH_BCOPY | |
120 | ||
9a8fd558 | 121 | #endif /* _XTENSA_STRING_H */ |