diff options
author | Thomas Gleixner <tglx@linutronix.de> | 2007-10-11 09:20:03 (GMT) |
---|---|---|
committer | Thomas Gleixner <tglx@linutronix.de> | 2007-10-11 09:20:03 (GMT) |
commit | 96a388de5dc53a8b234b3fd41f3ae2cedc9ffd42 (patch) | |
tree | d947a467aa2da3140279617bc4b9b101640d7bf4 /include/asm-x86/string_32.h | |
parent | 27bd0c955648646abf2a353a8371d28c37bcd982 (diff) | |
download | linux-fsl-qoriq-96a388de5dc53a8b234b3fd41f3ae2cedc9ffd42.tar.xz |
i386/x86_64: move headers to include/asm-x86
Move the headers to include/asm-x86 and fixup the
header install make rules
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/asm-x86/string_32.h')
-rw-r--r-- | include/asm-x86/string_32.h | 276 |
1 files changed, 276 insertions, 0 deletions
diff --git a/include/asm-x86/string_32.h b/include/asm-x86/string_32.h new file mode 100644 index 0000000..a9b6445 --- /dev/null +++ b/include/asm-x86/string_32.h @@ -0,0 +1,276 @@ +#ifndef _I386_STRING_H_ +#define _I386_STRING_H_ + +#ifdef __KERNEL__ + +/* Let gcc decide wether to inline or use the out of line functions */ + +#define __HAVE_ARCH_STRCPY +extern char *strcpy(char *dest, const char *src); + +#define __HAVE_ARCH_STRNCPY +extern char *strncpy(char *dest, const char *src, size_t count); + +#define __HAVE_ARCH_STRCAT +extern char *strcat(char *dest, const char *src); + +#define __HAVE_ARCH_STRNCAT +extern char *strncat(char *dest, const char *src, size_t count); + +#define __HAVE_ARCH_STRCMP +extern int strcmp(const char *cs, const char *ct); + +#define __HAVE_ARCH_STRNCMP +extern int strncmp(const char *cs, const char *ct, size_t count); + +#define __HAVE_ARCH_STRCHR +extern char *strchr(const char *s, int c); + +#define __HAVE_ARCH_STRRCHR +extern char *strrchr(const char *s, int c); + +#define __HAVE_ARCH_STRLEN +extern size_t strlen(const char *s); + +static __always_inline void * __memcpy(void * to, const void * from, size_t n) +{ +int d0, d1, d2; +__asm__ __volatile__( + "rep ; movsl\n\t" + "movl %4,%%ecx\n\t" + "andl $3,%%ecx\n\t" + "jz 1f\n\t" + "rep ; movsb\n\t" + "1:" + : "=&c" (d0), "=&D" (d1), "=&S" (d2) + : "0" (n/4), "g" (n), "1" ((long) to), "2" ((long) from) + : "memory"); +return (to); +} + +/* + * This looks ugly, but the compiler can optimize it totally, + * as the count is constant. + */ +static __always_inline void * __constant_memcpy(void * to, const void * from, size_t n) +{ + long esi, edi; + if (!n) return to; +#if 1 /* want to do small copies with non-string ops? */ + switch (n) { + case 1: *(char*)to = *(char*)from; return to; + case 2: *(short*)to = *(short*)from; return to; + case 4: *(int*)to = *(int*)from; return to; +#if 1 /* including those doable with two moves? */ + case 3: *(short*)to = *(short*)from; + *((char*)to+2) = *((char*)from+2); return to; + case 5: *(int*)to = *(int*)from; + *((char*)to+4) = *((char*)from+4); return to; + case 6: *(int*)to = *(int*)from; + *((short*)to+2) = *((short*)from+2); return to; + case 8: *(int*)to = *(int*)from; + *((int*)to+1) = *((int*)from+1); return to; +#endif + } +#endif + esi = (long) from; + edi = (long) to; + if (n >= 5*4) { + /* large block: use rep prefix */ + int ecx; + __asm__ __volatile__( + "rep ; movsl" + : "=&c" (ecx), "=&D" (edi), "=&S" (esi) + : "0" (n/4), "1" (edi),"2" (esi) + : "memory" + ); + } else { + /* small block: don't clobber ecx + smaller code */ + if (n >= 4*4) __asm__ __volatile__("movsl" + :"=&D"(edi),"=&S"(esi):"0"(edi),"1"(esi):"memory"); + if (n >= 3*4) __asm__ __volatile__("movsl" + :"=&D"(edi),"=&S"(esi):"0"(edi),"1"(esi):"memory"); + if (n >= 2*4) __asm__ __volatile__("movsl" + :"=&D"(edi),"=&S"(esi):"0"(edi),"1"(esi):"memory"); + if (n >= 1*4) __asm__ __volatile__("movsl" + :"=&D"(edi),"=&S"(esi):"0"(edi),"1"(esi):"memory"); + } + switch (n % 4) { + /* tail */ + case 0: return to; + case 1: __asm__ __volatile__("movsb" + :"=&D"(edi),"=&S"(esi):"0"(edi),"1"(esi):"memory"); + return to; + case 2: __asm__ __volatile__("movsw" + :"=&D"(edi),"=&S"(esi):"0"(edi),"1"(esi):"memory"); + return to; + default: __asm__ __volatile__("movsw\n\tmovsb" + :"=&D"(edi),"=&S"(esi):"0"(edi),"1"(esi):"memory"); + return to; + } +} + +#define __HAVE_ARCH_MEMCPY + +#ifdef CONFIG_X86_USE_3DNOW + +#include <asm/mmx.h> + +/* + * This CPU favours 3DNow strongly (eg AMD Athlon) + */ + +static inline void * __constant_memcpy3d(void * to, const void * from, size_t len) +{ + if (len < 512) + return __constant_memcpy(to, from, len); + return _mmx_memcpy(to, from, len); +} + +static __inline__ void *__memcpy3d(void *to, const void *from, size_t len) +{ + if (len < 512) + return __memcpy(to, from, len); + return _mmx_memcpy(to, from, len); +} + +#define memcpy(t, f, n) \ +(__builtin_constant_p(n) ? \ + __constant_memcpy3d((t),(f),(n)) : \ + __memcpy3d((t),(f),(n))) + +#else + +/* + * No 3D Now! + */ + +#define memcpy(t, f, n) \ +(__builtin_constant_p(n) ? \ + __constant_memcpy((t),(f),(n)) : \ + __memcpy((t),(f),(n))) + +#endif + +#define __HAVE_ARCH_MEMMOVE +void *memmove(void * dest,const void * src, size_t n); + +#define memcmp __builtin_memcmp + +#define __HAVE_ARCH_MEMCHR +extern void *memchr(const void * cs,int c,size_t count); + +static inline void * __memset_generic(void * s, char c,size_t count) +{ +int d0, d1; +__asm__ __volatile__( + "rep\n\t" + "stosb" + : "=&c" (d0), "=&D" (d1) + :"a" (c),"1" (s),"0" (count) + :"memory"); +return s; +} + +/* we might want to write optimized versions of these later */ +#define __constant_count_memset(s,c,count) __memset_generic((s),(c),(count)) + +/* + * memset(x,0,y) is a reasonably common thing to do, so we want to fill + * things 32 bits at a time even when we don't know the size of the + * area at compile-time.. + */ +static __always_inline void * __constant_c_memset(void * s, unsigned long c, size_t count) +{ +int d0, d1; +__asm__ __volatile__( + "rep ; stosl\n\t" + "testb $2,%b3\n\t" + "je 1f\n\t" + "stosw\n" + "1:\ttestb $1,%b3\n\t" + "je 2f\n\t" + "stosb\n" + "2:" + :"=&c" (d0), "=&D" (d1) + :"a" (c), "q" (count), "0" (count/4), "1" ((long) s) + :"memory"); +return (s); +} + +/* Added by Gertjan van Wingerde to make minix and sysv module work */ +#define __HAVE_ARCH_STRNLEN +extern size_t strnlen(const char * s, size_t count); +/* end of additional stuff */ + +#define __HAVE_ARCH_STRSTR +extern char *strstr(const char *cs, const char *ct); + +/* + * This looks horribly ugly, but the compiler can optimize it totally, + * as we by now know that both pattern and count is constant.. + */ +static __always_inline void * __constant_c_and_count_memset(void * s, unsigned long pattern, size_t count) +{ + switch (count) { + case 0: + return s; + case 1: + *(unsigned char *)s = pattern; + return s; + case 2: + *(unsigned short *)s = pattern; + return s; + case 3: + *(unsigned short *)s = pattern; + *(2+(unsigned char *)s) = pattern; + return s; + case 4: + *(unsigned long *)s = pattern; + return s; + } +#define COMMON(x) \ +__asm__ __volatile__( \ + "rep ; stosl" \ + x \ + : "=&c" (d0), "=&D" (d1) \ + : "a" (pattern),"0" (count/4),"1" ((long) s) \ + : "memory") +{ + int d0, d1; + switch (count % 4) { + case 0: COMMON(""); return s; + case 1: COMMON("\n\tstosb"); return s; + case 2: COMMON("\n\tstosw"); return s; + default: COMMON("\n\tstosw\n\tstosb"); return s; + } +} + +#undef COMMON +} + +#define __constant_c_x_memset(s, c, count) \ +(__builtin_constant_p(count) ? \ + __constant_c_and_count_memset((s),(c),(count)) : \ + __constant_c_memset((s),(c),(count))) + +#define __memset(s, c, count) \ +(__builtin_constant_p(count) ? \ + __constant_count_memset((s),(c),(count)) : \ + __memset_generic((s),(c),(count))) + +#define __HAVE_ARCH_MEMSET +#define memset(s, c, count) \ +(__builtin_constant_p(c) ? \ + __constant_c_x_memset((s),(0x01010101UL*(unsigned char)(c)),(count)) : \ + __memset((s),(c),(count))) + +/* + * find the first occurrence of byte 'c', or 1 past the area if none + */ +#define __HAVE_ARCH_MEMSCAN +extern void *memscan(void * addr, int c, size_t size); + +#endif /* __KERNEL__ */ + +#endif |