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1da177e4 LT |
1 | #ifndef _X86_64_STRING_H_ |
2 | #define _X86_64_STRING_H_ | |
3 | ||
4 | #ifdef __KERNEL__ | |
5 | ||
6 | /* Written 2002 by Andi Kleen */ | |
7 | ||
8 | /* Only used for special circumstances. Stolen from i386/string.h */ | |
79121ea9 AK |
9 | static __always_inline void * |
10 | __inline_memcpy(void * to, const void * from, size_t n) | |
1da177e4 LT |
11 | { |
12 | unsigned long d0, d1, d2; | |
13 | __asm__ __volatile__( | |
14 | "rep ; movsl\n\t" | |
15 | "testb $2,%b4\n\t" | |
16 | "je 1f\n\t" | |
17 | "movsw\n" | |
18 | "1:\ttestb $1,%b4\n\t" | |
19 | "je 2f\n\t" | |
20 | "movsb\n" | |
21 | "2:" | |
22 | : "=&c" (d0), "=&D" (d1), "=&S" (d2) | |
23 | :"0" (n/4), "q" (n),"1" ((long) to),"2" ((long) from) | |
24 | : "memory"); | |
25 | return (to); | |
26 | } | |
27 | ||
28 | /* Even with __builtin_ the compiler may decide to use the out of line | |
29 | function. */ | |
30 | ||
31 | #define __HAVE_ARCH_MEMCPY 1 | |
aac57f81 AK |
32 | #if (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) || __GNUC__ > 4 |
33 | extern void *memcpy(void *to, const void *from, size_t len); | |
34 | #else | |
1da177e4 LT |
35 | extern void *__memcpy(void *to, const void *from, size_t len); |
36 | #define memcpy(dst,src,len) \ | |
37 | ({ size_t __len = (len); \ | |
38 | void *__ret; \ | |
39 | if (__builtin_constant_p(len) && __len >= 64) \ | |
40 | __ret = __memcpy((dst),(src),__len); \ | |
41 | else \ | |
42 | __ret = __builtin_memcpy((dst),(src),__len); \ | |
43 | __ret; }) | |
aac57f81 | 44 | #endif |
1da177e4 LT |
45 | |
46 | #define __HAVE_ARCH_MEMSET | |
6edfba1b | 47 | void *memset(void *s, int c, size_t n); |
1da177e4 LT |
48 | |
49 | #define __HAVE_ARCH_MEMMOVE | |
50 | void * memmove(void * dest,const void *src,size_t count); | |
51 | ||
1da177e4 | 52 | int memcmp(const void * cs,const void * ct,size_t count); |
1da177e4 | 53 | size_t strlen(const char * s); |
6edfba1b AK |
54 | char *strcpy(char * dest,const char *src); |
55 | char *strcat(char * dest, const char * src); | |
1da177e4 LT |
56 | int strcmp(const char * cs,const char * ct); |
57 | ||
58 | #endif /* __KERNEL__ */ | |
59 | ||
60 | #endif |