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/* $Id: string.h,v 1.27 1996/10/27 08:55:50 davem Exp $
* string.h: External definitions for optimized assembly string
* routines for the Linux Kernel.
*
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
*/
#ifndef __SPARC_STRING_H__
#define __SPARC_STRING_H__
/* Really, userland/ksyms should not see any of this stuff. */
#if defined(__KERNEL__) && !defined(EXPORT_SYMTAB)
/* First the mem*() things. */
#define __HAVE_ARCH_BCOPY
#define __HAVE_ARCH_MEMMOVE
#define __HAVE_ARCH_MEMCPY
extern void *__memcpy(void *,const void *,__kernel_size_t);
extern inline void *__constant_memcpy(void *to, const void *from, __kernel_size_t n)
{
extern void __copy_1page(void *, const void *);
if(n <= 32) {
__builtin_memcpy(to, from, n);
} else {
switch(n) {
case 4096:
__copy_1page(to, from);
break;
default:
__memcpy(to, from, n);
break;
}
}
return to;
}
extern inline void *__nonconstant_memcpy(void *to, const void *from, __kernel_size_t n)
{
__memcpy(to, from, n);
return to;
}
#undef memcpy
#define memcpy(t, f, n) \
(__builtin_constant_p(n) ? \
__constant_memcpy((t),(f),(n)) : \
__nonconstant_memcpy((t),(f),(n)))
#define __HAVE_ARCH_MEMSET
extern void *__memset(void *,int,__kernel_size_t);
extern inline void *__constant_c_and_count_memset(void *s, char c, size_t count)
{
extern void *bzero_1page(void *);
extern void *__bzero(void *, size_t);
if(!c) {
if(count == 4096)
bzero_1page(s);
else
__bzero(s, count);
} else {
__memset(s, c, count);
}
return s;
}
extern inline void *__constant_c_memset(void *s, char c, size_t count)
{
extern void *__bzero(void *, size_t);
if(!c)
__bzero(s, count);
else
__memset(s, c, count);
return s;
}
#undef memset
#define memset(s, c, count) \
(__builtin_constant_p(c) ? (__builtin_constant_p(count) ? \
__constant_c_and_count_memset((s), (c), (count)) : \
__constant_c_memset((s), (c), (count))) \
: __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
/* Now the str*() stuff... */
#define __HAVE_ARCH_STRLEN
#define __HAVE_ARCH_STRNCMP
extern int __strncmp(const char *, const char *, __kernel_size_t);
extern 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 /* (__KERNEL__) && !(_KSYMS_INTERNEL) */
#endif /* !(__SPARC_STRING_H__) */
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