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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /arch/x86/include/asm/string_64.h | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'arch/x86/include/asm/string_64.h')
-rw-r--r-- | arch/x86/include/asm/string_64.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/arch/x86/include/asm/string_64.h b/arch/x86/include/asm/string_64.h new file mode 100644 index 00000000..19e2c468 --- /dev/null +++ b/arch/x86/include/asm/string_64.h @@ -0,0 +1,68 @@ +#ifndef _ASM_X86_STRING_64_H +#define _ASM_X86_STRING_64_H + +#ifdef __KERNEL__ + +/* Written 2002 by Andi Kleen */ + +/* Only used for special circumstances. Stolen from i386/string.h */ +static __always_inline void *__inline_memcpy(void *to, const void *from, size_t n) +{ + unsigned long d0, d1, d2; + asm volatile("rep ; movsl\n\t" + "testb $2,%b4\n\t" + "je 1f\n\t" + "movsw\n" + "1:\ttestb $1,%b4\n\t" + "je 2f\n\t" + "movsb\n" + "2:" + : "=&c" (d0), "=&D" (d1), "=&S" (d2) + : "0" (n / 4), "q" (n), "1" ((long)to), "2" ((long)from) + : "memory"); + return to; +} + +/* Even with __builtin_ the compiler may decide to use the out of line + function. */ + +#define __HAVE_ARCH_MEMCPY 1 +#ifndef CONFIG_KMEMCHECK +#if (__GNUC__ == 4 && __GNUC_MINOR__ >= 3) || __GNUC__ > 4 +extern void *memcpy(void *to, const void *from, size_t len); +#else +extern void *__memcpy(void *to, const void *from, size_t len); +#define memcpy(dst, src, len) \ +({ \ + size_t __len = (len); \ + void *__ret; \ + if (__builtin_constant_p(len) && __len >= 64) \ + __ret = __memcpy((dst), (src), __len); \ + else \ + __ret = __builtin_memcpy((dst), (src), __len); \ + __ret; \ +}) +#endif +#else +/* + * kmemcheck becomes very happy if we use the REP instructions unconditionally, + * because it means that we know both memory operands in advance. + */ +#define memcpy(dst, src, len) __inline_memcpy((dst), (src), (len)) +#endif + +#define __HAVE_ARCH_MEMSET +void *memset(void *s, int c, size_t n); + +#define __HAVE_ARCH_MEMMOVE +void *memmove(void *dest, const void *src, size_t count); + +int memcmp(const void *cs, const void *ct, size_t count); +size_t strlen(const char *s); +char *strcpy(char *dest, const char *src); +char *strcat(char *dest, const char *src); +int strcmp(const char *cs, const char *ct); + +#endif /* __KERNEL__ */ + +#endif /* _ASM_X86_STRING_64_H */ |