1 /* $Id: string.h,v 1.20 2001/09/27 04:36:24 kanoj Exp $
2 * string.h: External definitions for optimized assembly string
3 * routines for the Linux Kernel.
5 * Copyright (C) 1995,1996 David S. Miller (davem@caip.rutgers.edu)
6 * Copyright (C) 1996,1997,1999 Jakub Jelinek (jakub@redhat.com)
9 #ifndef __SPARC64_STRING_H__
10 #define __SPARC64_STRING_H__
12 /* Really, userland/ksyms should not see any of this stuff. */
18 extern void __memmove(void *,const void *,__kernel_size_t);
19 extern __kernel_size_t __memcpy(void *,const void *,__kernel_size_t);
20 extern void *__memset(void *,int,__kernel_size_t);
21 extern void *__builtin_memcpy(void *,const void *,__kernel_size_t);
22 extern void *__builtin_memset(void *,int,__kernel_size_t);
24 #ifndef EXPORT_SYMTAB_STROPS
26 /* First the mem*() things. */
27 #define __HAVE_ARCH_BCOPY
28 #define __HAVE_ARCH_MEMMOVE
31 #define memmove(_to, _from, _n) \
34 __memmove(_t, (_from), (_n)); \
38 #define __HAVE_ARCH_MEMCPY
40 static inline void *__constant_memcpy(void *to, const void *from, __kernel_size_t n)
44 __builtin_memcpy(to, from, n);
46 __memcpy(to, from, n);
52 static inline void *__nonconstant_memcpy(void *to, const void *from, __kernel_size_t n)
54 __memcpy(to, from, n);
59 #define memcpy(t, f, n) \
60 (__builtin_constant_p(n) ? \
61 __constant_memcpy((t),(f),(n)) : \
62 __nonconstant_memcpy((t),(f),(n)))
64 #define __HAVE_ARCH_MEMSET
66 static inline void *__constant_memset(void *s, int c, __kernel_size_t count)
68 extern __kernel_size_t __bzero(void *, __kernel_size_t);
74 return __memset(s, c, count);
78 #define memset(s, c, count) \
79 ((__builtin_constant_p(count) && (count) <= 32) ? \
80 __builtin_memset((s), (c), (count)) : \
81 (__builtin_constant_p(c) ? \
82 __constant_memset((s), (c), (count)) : \
83 __memset((s), (c), (count))))
85 #define __HAVE_ARCH_MEMSCAN
88 #define memscan(__arg0, __char, __arg2) \
90 extern void *__memscan_zero(void *, size_t); \
91 extern void *__memscan_generic(void *, int, size_t); \
92 void *__retval, *__addr = (__arg0); \
93 size_t __size = (__arg2); \
95 if(__builtin_constant_p(__char) && !(__char)) \
96 __retval = __memscan_zero(__addr, __size); \
98 __retval = __memscan_generic(__addr, (__char), __size); \
103 #define __HAVE_ARCH_MEMCMP
104 extern int memcmp(const void *,const void *,__kernel_size_t);
106 /* Now the str*() stuff... */
107 #define __HAVE_ARCH_STRLEN
109 extern __kernel_size_t __strlen(const char *);
110 extern __kernel_size_t strlen(const char *);
112 #define __HAVE_ARCH_STRNCMP
114 extern int __strncmp(const char *, const char *, __kernel_size_t);
116 static inline int __constant_strncmp(const char *src, const char *dest, __kernel_size_t count)
121 case 1: return (src[0] - dest[0]);
122 case 2: retval = (src[0] - dest[0]);
123 if(!retval && src[0])
124 retval = (src[1] - dest[1]);
126 case 3: retval = (src[0] - dest[0]);
127 if(!retval && src[0]) {
128 retval = (src[1] - dest[1]);
129 if(!retval && src[1])
130 retval = (src[2] - dest[2]);
133 case 4: retval = (src[0] - dest[0]);
134 if(!retval && src[0]) {
135 retval = (src[1] - dest[1]);
136 if(!retval && src[1]) {
137 retval = (src[2] - dest[2]);
138 if (!retval && src[2])
139 retval = (src[3] - dest[3]);
143 case 5: retval = (src[0] - dest[0]);
144 if(!retval && src[0]) {
145 retval = (src[1] - dest[1]);
146 if(!retval && src[1]) {
147 retval = (src[2] - dest[2]);
148 if (!retval && src[2]) {
149 retval = (src[3] - dest[3]);
150 if (!retval && src[3])
151 retval = (src[4] - dest[4]);
157 retval = (src[0] - dest[0]);
158 if(!retval && src[0]) {
159 retval = (src[1] - dest[1]);
160 if(!retval && src[1]) {
161 retval = (src[2] - dest[2]);
162 if(!retval && src[2])
163 retval = __strncmp(src+3,dest+3,count-3);
171 #define strncmp(__arg0, __arg1, __arg2) \
172 (__builtin_constant_p(__arg2) ? \
173 __constant_strncmp(__arg0, __arg1, __arg2) : \
174 __strncmp(__arg0, __arg1, __arg2))
176 #endif /* !EXPORT_SYMTAB_STROPS */
178 #endif /* __KERNEL__ */
180 #endif /* !(__SPARC64_STRING_H__) */