Commit | Line | Data |
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88278ca2 | 1 | /* |
1da177e4 LT |
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); | |
19 | extern __kernel_size_t __memcpy(void *,const void *,__kernel_size_t); | |
20 | extern __kernel_size_t __memset(void *,int,__kernel_size_t); | |
21 | ||
22 | #ifndef EXPORT_SYMTAB_STROPS | |
23 | ||
24 | /* First the mem*() things. */ | |
25 | #define __HAVE_ARCH_MEMMOVE | |
26 | #undef memmove | |
27 | #define memmove(_to, _from, _n) \ | |
28 | ({ \ | |
29 | void *_t = (_to); \ | |
30 | __memmove(_t, (_from), (_n)); \ | |
31 | _t; \ | |
32 | }) | |
33 | ||
34 | #define __HAVE_ARCH_MEMCPY | |
35 | ||
36 | static inline void *__constant_memcpy(void *to, const void *from, __kernel_size_t n) | |
37 | { | |
38 | extern void __copy_1page(void *, const void *); | |
39 | ||
40 | if(n <= 32) { | |
41 | __builtin_memcpy(to, from, n); | |
42 | } else if (((unsigned int) to & 7) != 0) { | |
43 | /* Destination is not aligned on the double-word boundary */ | |
44 | __memcpy(to, from, n); | |
45 | } else { | |
46 | switch(n) { | |
47 | case PAGE_SIZE: | |
48 | __copy_1page(to, from); | |
49 | break; | |
50 | default: | |
51 | __memcpy(to, from, n); | |
52 | break; | |
53 | } | |
54 | } | |
55 | return to; | |
56 | } | |
57 | ||
58 | static inline void *__nonconstant_memcpy(void *to, const void *from, __kernel_size_t n) | |
59 | { | |
60 | __memcpy(to, from, n); | |
61 | return to; | |
62 | } | |
63 | ||
64 | #undef memcpy | |
65 | #define memcpy(t, f, n) \ | |
66 | (__builtin_constant_p(n) ? \ | |
67 | __constant_memcpy((t),(f),(n)) : \ | |
68 | __nonconstant_memcpy((t),(f),(n))) | |
69 | ||
70 | #define __HAVE_ARCH_MEMSET | |
71 | ||
72 | static inline void *__constant_c_and_count_memset(void *s, char c, __kernel_size_t count) | |
73 | { | |
74 | extern void bzero_1page(void *); | |
75 | extern __kernel_size_t __bzero(void *, __kernel_size_t); | |
76 | ||
77 | if(!c) { | |
78 | if(count == PAGE_SIZE) | |
79 | bzero_1page(s); | |
80 | else | |
81 | __bzero(s, count); | |
82 | } else { | |
83 | __memset(s, c, count); | |
84 | } | |
85 | return s; | |
86 | } | |
87 | ||
88 | static inline void *__constant_c_memset(void *s, char c, __kernel_size_t count) | |
89 | { | |
90 | extern __kernel_size_t __bzero(void *, __kernel_size_t); | |
91 | ||
92 | if(!c) | |
93 | __bzero(s, count); | |
94 | else | |
95 | __memset(s, c, count); | |
96 | return s; | |
97 | } | |
98 | ||
99 | static inline void *__nonconstant_memset(void *s, char c, __kernel_size_t count) | |
100 | { | |
101 | __memset(s, c, count); | |
102 | return s; | |
103 | } | |
104 | ||
105 | #undef memset | |
106 | #define memset(s, c, count) \ | |
107 | (__builtin_constant_p(c) ? (__builtin_constant_p(count) ? \ | |
108 | __constant_c_and_count_memset((s), (c), (count)) : \ | |
109 | __constant_c_memset((s), (c), (count))) \ | |
110 | : __nonconstant_memset((s), (c), (count))) | |
111 | ||
112 | #define __HAVE_ARCH_MEMSCAN | |
113 | ||
114 | #undef memscan | |
115 | #define memscan(__arg0, __char, __arg2) \ | |
116 | ({ \ | |
117 | extern void *__memscan_zero(void *, size_t); \ | |
118 | extern void *__memscan_generic(void *, int, size_t); \ | |
119 | void *__retval, *__addr = (__arg0); \ | |
120 | size_t __size = (__arg2); \ | |
121 | \ | |
122 | if(__builtin_constant_p(__char) && !(__char)) \ | |
123 | __retval = __memscan_zero(__addr, __size); \ | |
124 | else \ | |
125 | __retval = __memscan_generic(__addr, (__char), __size); \ | |
126 | \ | |
127 | __retval; \ | |
128 | }) | |
129 | ||
130 | #define __HAVE_ARCH_MEMCMP | |
131 | extern int memcmp(const void *,const void *,__kernel_size_t); | |
132 | ||
133 | /* Now the str*() stuff... */ | |
134 | #define __HAVE_ARCH_STRLEN | |
135 | extern __kernel_size_t strlen(const char *); | |
136 | ||
137 | #define __HAVE_ARCH_STRNCMP | |
138 | ||
139 | extern int __strncmp(const char *, const char *, __kernel_size_t); | |
140 | ||
141 | static inline int __constant_strncmp(const char *src, const char *dest, __kernel_size_t count) | |
142 | { | |
143 | register int retval; | |
144 | switch(count) { | |
145 | case 0: return 0; | |
146 | case 1: return (src[0] - dest[0]); | |
147 | case 2: retval = (src[0] - dest[0]); | |
148 | if(!retval && src[0]) | |
149 | retval = (src[1] - dest[1]); | |
150 | return retval; | |
151 | case 3: retval = (src[0] - dest[0]); | |
152 | if(!retval && src[0]) { | |
153 | retval = (src[1] - dest[1]); | |
154 | if(!retval && src[1]) | |
155 | retval = (src[2] - dest[2]); | |
156 | } | |
157 | return retval; | |
158 | case 4: retval = (src[0] - dest[0]); | |
159 | if(!retval && src[0]) { | |
160 | retval = (src[1] - dest[1]); | |
161 | if(!retval && src[1]) { | |
162 | retval = (src[2] - dest[2]); | |
163 | if (!retval && src[2]) | |
164 | retval = (src[3] - dest[3]); | |
165 | } | |
166 | } | |
167 | return retval; | |
168 | case 5: retval = (src[0] - dest[0]); | |
169 | if(!retval && src[0]) { | |
170 | retval = (src[1] - dest[1]); | |
171 | if(!retval && src[1]) { | |
172 | retval = (src[2] - dest[2]); | |
173 | if (!retval && src[2]) { | |
174 | retval = (src[3] - dest[3]); | |
175 | if (!retval && src[3]) | |
176 | retval = (src[4] - dest[4]); | |
177 | } | |
178 | } | |
179 | } | |
180 | return retval; | |
181 | default: | |
182 | retval = (src[0] - dest[0]); | |
183 | if(!retval && src[0]) { | |
184 | retval = (src[1] - dest[1]); | |
185 | if(!retval && src[1]) { | |
186 | retval = (src[2] - dest[2]); | |
187 | if(!retval && src[2]) | |
188 | retval = __strncmp(src+3,dest+3,count-3); | |
189 | } | |
190 | } | |
191 | return retval; | |
192 | } | |
193 | } | |
194 | ||
195 | #undef strncmp | |
196 | #define strncmp(__arg0, __arg1, __arg2) \ | |
197 | (__builtin_constant_p(__arg2) ? \ | |
198 | __constant_strncmp(__arg0, __arg1, __arg2) : \ | |
199 | __strncmp(__arg0, __arg1, __arg2)) | |
200 | ||
201 | #endif /* !EXPORT_SYMTAB_STROPS */ | |
202 | ||
203 | #endif /* __KERNEL__ */ | |
204 | ||
205 | #endif /* !(__SPARC_STRING_H__) */ |