forked from luck/tmp_suning_uos_patched
4d14a45985
This mirrors commit ff60fab71b
(x86: Use __builtin_memset and __builtin_memcpy for memset/memcpy)
Signed-off-by: David S. Miller <davem@davemloft.net>
132 lines
3.2 KiB
C
132 lines
3.2 KiB
C
/*
|
|
* string.h: External definitions for optimized assembly string
|
|
* routines for the Linux Kernel.
|
|
*
|
|
* Copyright (C) 1995,1996 David S. Miller (davem@caip.rutgers.edu)
|
|
* Copyright (C) 1996,1997 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
|
|
*/
|
|
|
|
#ifndef __SPARC_STRING_H__
|
|
#define __SPARC_STRING_H__
|
|
|
|
#include <asm/page.h>
|
|
|
|
/* Really, userland/ksyms should not see any of this stuff. */
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
extern void __memmove(void *,const void *,__kernel_size_t);
|
|
|
|
#ifndef EXPORT_SYMTAB_STROPS
|
|
|
|
/* First the mem*() things. */
|
|
#define __HAVE_ARCH_MEMMOVE
|
|
#undef memmove
|
|
#define memmove(_to, _from, _n) \
|
|
({ \
|
|
void *_t = (_to); \
|
|
__memmove(_t, (_from), (_n)); \
|
|
_t; \
|
|
})
|
|
|
|
#define __HAVE_ARCH_MEMCPY
|
|
#define memcpy(t, f, n) __builtin_memcpy(t, f, n)
|
|
|
|
#define __HAVE_ARCH_MEMSET
|
|
#define memset(s, c, count) __builtin_memset(s, c, count)
|
|
|
|
#define __HAVE_ARCH_MEMSCAN
|
|
|
|
#undef memscan
|
|
#define memscan(__arg0, __char, __arg2) \
|
|
({ \
|
|
extern void *__memscan_zero(void *, size_t); \
|
|
extern void *__memscan_generic(void *, int, size_t); \
|
|
void *__retval, *__addr = (__arg0); \
|
|
size_t __size = (__arg2); \
|
|
\
|
|
if(__builtin_constant_p(__char) && !(__char)) \
|
|
__retval = __memscan_zero(__addr, __size); \
|
|
else \
|
|
__retval = __memscan_generic(__addr, (__char), __size); \
|
|
\
|
|
__retval; \
|
|
})
|
|
|
|
#define __HAVE_ARCH_MEMCMP
|
|
extern int memcmp(const void *,const void *,__kernel_size_t);
|
|
|
|
/* Now the str*() stuff... */
|
|
#define __HAVE_ARCH_STRLEN
|
|
extern __kernel_size_t strlen(const char *);
|
|
|
|
#define __HAVE_ARCH_STRNCMP
|
|
|
|
extern int __strncmp(const char *, const char *, __kernel_size_t);
|
|
|
|
static inline int __constant_strncmp(const char *src, const char *dest, __kernel_size_t count)
|
|
{
|
|
register int retval;
|
|
switch(count) {
|
|
case 0: return 0;
|
|
case 1: return (src[0] - dest[0]);
|
|
case 2: retval = (src[0] - dest[0]);
|
|
if(!retval && src[0])
|
|
retval = (src[1] - dest[1]);
|
|
return retval;
|
|
case 3: retval = (src[0] - dest[0]);
|
|
if(!retval && src[0]) {
|
|
retval = (src[1] - dest[1]);
|
|
if(!retval && src[1])
|
|
retval = (src[2] - dest[2]);
|
|
}
|
|
return retval;
|
|
case 4: retval = (src[0] - dest[0]);
|
|
if(!retval && src[0]) {
|
|
retval = (src[1] - dest[1]);
|
|
if(!retval && src[1]) {
|
|
retval = (src[2] - dest[2]);
|
|
if (!retval && src[2])
|
|
retval = (src[3] - dest[3]);
|
|
}
|
|
}
|
|
return retval;
|
|
case 5: retval = (src[0] - dest[0]);
|
|
if(!retval && src[0]) {
|
|
retval = (src[1] - dest[1]);
|
|
if(!retval && src[1]) {
|
|
retval = (src[2] - dest[2]);
|
|
if (!retval && src[2]) {
|
|
retval = (src[3] - dest[3]);
|
|
if (!retval && src[3])
|
|
retval = (src[4] - dest[4]);
|
|
}
|
|
}
|
|
}
|
|
return retval;
|
|
default:
|
|
retval = (src[0] - dest[0]);
|
|
if(!retval && src[0]) {
|
|
retval = (src[1] - dest[1]);
|
|
if(!retval && src[1]) {
|
|
retval = (src[2] - dest[2]);
|
|
if(!retval && src[2])
|
|
retval = __strncmp(src+3,dest+3,count-3);
|
|
}
|
|
}
|
|
return retval;
|
|
}
|
|
}
|
|
|
|
#undef strncmp
|
|
#define strncmp(__arg0, __arg1, __arg2) \
|
|
(__builtin_constant_p(__arg2) ? \
|
|
__constant_strncmp(__arg0, __arg1, __arg2) : \
|
|
__strncmp(__arg0, __arg1, __arg2))
|
|
|
|
#endif /* !EXPORT_SYMTAB_STROPS */
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* !(__SPARC_STRING_H__) */
|