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f5e706ad SR |
1 | /* |
2 | * string.h: External definitions for optimized assembly string | |
3 | * routines for the Linux Kernel. | |
4 | * | |
5 | * Copyright (C) 1995,1996 David S. Miller (davem@caip.rutgers.edu) | |
6 | * Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz) | |
7 | */ | |
8 | ||
9 | #ifndef __SPARC_STRING_H__ | |
10 | #define __SPARC_STRING_H__ | |
11 | ||
12 | #include <asm/page.h> | |
13 | ||
14 | /* Really, userland/ksyms should not see any of this stuff. */ | |
15 | ||
16 | #ifdef __KERNEL__ | |
17 | ||
18 | extern void __memmove(void *,const void *,__kernel_size_t); | |
f5e706ad SR |
19 | |
20 | #ifndef EXPORT_SYMTAB_STROPS | |
21 | ||
22 | /* First the mem*() things. */ | |
23 | #define __HAVE_ARCH_MEMMOVE | |
24 | #undef memmove | |
25 | #define memmove(_to, _from, _n) \ | |
26 | ({ \ | |
27 | void *_t = (_to); \ | |
28 | __memmove(_t, (_from), (_n)); \ | |
29 | _t; \ | |
30 | }) | |
31 | ||
32 | #define __HAVE_ARCH_MEMCPY | |
4d14a459 | 33 | #define memcpy(t, f, n) __builtin_memcpy(t, f, n) |
f5e706ad SR |
34 | |
35 | #define __HAVE_ARCH_MEMSET | |
4d14a459 | 36 | #define memset(s, c, count) __builtin_memset(s, c, count) |
f5e706ad SR |
37 | |
38 | #define __HAVE_ARCH_MEMSCAN | |
39 | ||
40 | #undef memscan | |
41 | #define memscan(__arg0, __char, __arg2) \ | |
42 | ({ \ | |
43 | extern void *__memscan_zero(void *, size_t); \ | |
44 | extern void *__memscan_generic(void *, int, size_t); \ | |
45 | void *__retval, *__addr = (__arg0); \ | |
46 | size_t __size = (__arg2); \ | |
47 | \ | |
48 | if(__builtin_constant_p(__char) && !(__char)) \ | |
49 | __retval = __memscan_zero(__addr, __size); \ | |
50 | else \ | |
51 | __retval = __memscan_generic(__addr, (__char), __size); \ | |
52 | \ | |
53 | __retval; \ | |
54 | }) | |
55 | ||
56 | #define __HAVE_ARCH_MEMCMP | |
57 | extern int memcmp(const void *,const void *,__kernel_size_t); | |
58 | ||
59 | /* Now the str*() stuff... */ | |
60 | #define __HAVE_ARCH_STRLEN | |
61 | extern __kernel_size_t strlen(const char *); | |
62 | ||
63 | #define __HAVE_ARCH_STRNCMP | |
64 | ||
65 | extern int __strncmp(const char *, const char *, __kernel_size_t); | |
66 | ||
67 | static inline int __constant_strncmp(const char *src, const char *dest, __kernel_size_t count) | |
68 | { | |
69 | register int retval; | |
70 | switch(count) { | |
71 | case 0: return 0; | |
72 | case 1: return (src[0] - dest[0]); | |
73 | case 2: retval = (src[0] - dest[0]); | |
74 | if(!retval && src[0]) | |
75 | retval = (src[1] - dest[1]); | |
76 | return retval; | |
77 | case 3: retval = (src[0] - dest[0]); | |
78 | if(!retval && src[0]) { | |
79 | retval = (src[1] - dest[1]); | |
80 | if(!retval && src[1]) | |
81 | retval = (src[2] - dest[2]); | |
82 | } | |
83 | return retval; | |
84 | case 4: retval = (src[0] - dest[0]); | |
85 | if(!retval && src[0]) { | |
86 | retval = (src[1] - dest[1]); | |
87 | if(!retval && src[1]) { | |
88 | retval = (src[2] - dest[2]); | |
89 | if (!retval && src[2]) | |
90 | retval = (src[3] - dest[3]); | |
91 | } | |
92 | } | |
93 | return retval; | |
94 | case 5: retval = (src[0] - dest[0]); | |
95 | if(!retval && src[0]) { | |
96 | retval = (src[1] - dest[1]); | |
97 | if(!retval && src[1]) { | |
98 | retval = (src[2] - dest[2]); | |
99 | if (!retval && src[2]) { | |
100 | retval = (src[3] - dest[3]); | |
101 | if (!retval && src[3]) | |
102 | retval = (src[4] - dest[4]); | |
103 | } | |
104 | } | |
105 | } | |
106 | return retval; | |
107 | default: | |
108 | retval = (src[0] - dest[0]); | |
109 | if(!retval && src[0]) { | |
110 | retval = (src[1] - dest[1]); | |
111 | if(!retval && src[1]) { | |
112 | retval = (src[2] - dest[2]); | |
113 | if(!retval && src[2]) | |
114 | retval = __strncmp(src+3,dest+3,count-3); | |
115 | } | |
116 | } | |
117 | return retval; | |
118 | } | |
119 | } | |
120 | ||
121 | #undef strncmp | |
122 | #define strncmp(__arg0, __arg1, __arg2) \ | |
123 | (__builtin_constant_p(__arg2) ? \ | |
124 | __constant_strncmp(__arg0, __arg1, __arg2) : \ | |
125 | __strncmp(__arg0, __arg1, __arg2)) | |
126 | ||
127 | #endif /* !EXPORT_SYMTAB_STROPS */ | |
128 | ||
129 | #endif /* __KERNEL__ */ | |
130 | ||
131 | #endif /* !(__SPARC_STRING_H__) */ |