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1965aae3 PA |
1 | #ifndef _ASM_X86_STRING_64_H |
2 | #define _ASM_X86_STRING_64_H | |
1da177e4 LT |
3 | |
4 | #ifdef __KERNEL__ | |
5 | ||
953b2f1e | 6 | /* Written 2002 by Andi Kleen */ |
1da177e4 | 7 | |
953b2f1e JP |
8 | /* Only used for special circumstances. Stolen from i386/string.h */ |
9 | static __always_inline void *__inline_memcpy(void *to, const void *from, size_t n) | |
1da177e4 | 10 | { |
953b2f1e JP |
11 | unsigned long d0, d1, d2; |
12 | asm volatile("rep ; movsl\n\t" | |
13 | "testb $2,%b4\n\t" | |
14 | "je 1f\n\t" | |
15 | "movsw\n" | |
16 | "1:\ttestb $1,%b4\n\t" | |
17 | "je 2f\n\t" | |
18 | "movsb\n" | |
19 | "2:" | |
20 | : "=&c" (d0), "=&D" (d1), "=&S" (d2) | |
21 | : "0" (n / 4), "q" (n), "1" ((long)to), "2" ((long)from) | |
22 | : "memory"); | |
23 | return to; | |
1da177e4 LT |
24 | } |
25 | ||
26 | /* Even with __builtin_ the compiler may decide to use the out of line | |
27 | function. */ | |
28 | ||
29 | #define __HAVE_ARCH_MEMCPY 1 | |
aac57f81 AK |
30 | #if (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) || __GNUC__ > 4 |
31 | extern void *memcpy(void *to, const void *from, size_t len); | |
32 | #else | |
953b2f1e JP |
33 | extern void *__memcpy(void *to, const void *from, size_t len); |
34 | #define memcpy(dst, src, len) \ | |
35 | ({ \ | |
36 | size_t __len = (len); \ | |
37 | void *__ret; \ | |
38 | if (__builtin_constant_p(len) && __len >= 64) \ | |
39 | __ret = __memcpy((dst), (src), __len); \ | |
40 | else \ | |
41 | __ret = __builtin_memcpy((dst), (src), __len); \ | |
42 | __ret; \ | |
43 | }) | |
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 | |
953b2f1e | 50 | void *memmove(void *dest, const void *src, size_t count); |
1da177e4 | 51 | |
953b2f1e JP |
52 | int memcmp(const void *cs, const void *ct, size_t count); |
53 | size_t strlen(const char *s); | |
54 | char *strcpy(char *dest, const char *src); | |
55 | char *strcat(char *dest, const char *src); | |
56 | int strcmp(const char *cs, const char *ct); | |
1da177e4 LT |
57 | |
58 | #endif /* __KERNEL__ */ | |
59 | ||
1965aae3 | 60 | #endif /* _ASM_X86_STRING_64_H */ |