Commit | Line | Data |
---|---|---|
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 | |
f8561296 | 30 | #ifndef CONFIG_KMEMCHECK |
aac57f81 AK |
31 | #if (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) || __GNUC__ > 4 |
32 | extern void *memcpy(void *to, const void *from, size_t len); | |
33 | #else | |
953b2f1e JP |
34 | extern void *__memcpy(void *to, const void *from, size_t len); |
35 | #define memcpy(dst, src, len) \ | |
36 | ({ \ | |
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; \ | |
44 | }) | |
aac57f81 | 45 | #endif |
f8561296 VN |
46 | #else |
47 | /* | |
48 | * kmemcheck becomes very happy if we use the REP instructions unconditionally, | |
49 | * because it means that we know both memory operands in advance. | |
50 | */ | |
51 | #define memcpy(dst, src, len) __inline_memcpy((dst), (src), (len)) | |
52 | #endif | |
1da177e4 LT |
53 | |
54 | #define __HAVE_ARCH_MEMSET | |
6edfba1b | 55 | void *memset(void *s, int c, size_t n); |
1da177e4 LT |
56 | |
57 | #define __HAVE_ARCH_MEMMOVE | |
953b2f1e | 58 | void *memmove(void *dest, const void *src, size_t count); |
1da177e4 | 59 | |
953b2f1e JP |
60 | int memcmp(const void *cs, const void *ct, size_t count); |
61 | size_t strlen(const char *s); | |
62 | char *strcpy(char *dest, const char *src); | |
63 | char *strcat(char *dest, const char *src); | |
64 | int strcmp(const char *cs, const char *ct); | |
1da177e4 LT |
65 | |
66 | #endif /* __KERNEL__ */ | |
67 | ||
1965aae3 | 68 | #endif /* _ASM_X86_STRING_64_H */ |