mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-16 16:54:20 +08:00
1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
543 lines
12 KiB
C
543 lines
12 KiB
C
#ifndef _M68K_STRING_H_
|
|
#define _M68K_STRING_H_
|
|
|
|
#include <asm/setup.h>
|
|
#include <asm/page.h>
|
|
|
|
#define __HAVE_ARCH_STRCPY
|
|
static inline char * strcpy(char * dest,const char *src)
|
|
{
|
|
char *xdest = dest;
|
|
|
|
__asm__ __volatile__
|
|
("1:\tmoveb %1@+,%0@+\n\t"
|
|
"jne 1b"
|
|
: "=a" (dest), "=a" (src)
|
|
: "0" (dest), "1" (src) : "memory");
|
|
return xdest;
|
|
}
|
|
|
|
#define __HAVE_ARCH_STRNCPY
|
|
static inline char * strncpy(char *dest, const char *src, size_t n)
|
|
{
|
|
char *xdest = dest;
|
|
|
|
if (n == 0)
|
|
return xdest;
|
|
|
|
__asm__ __volatile__
|
|
("1:\tmoveb %1@+,%0@+\n\t"
|
|
"jeq 2f\n\t"
|
|
"subql #1,%2\n\t"
|
|
"jne 1b\n\t"
|
|
"2:"
|
|
: "=a" (dest), "=a" (src), "=d" (n)
|
|
: "0" (dest), "1" (src), "2" (n)
|
|
: "memory");
|
|
return xdest;
|
|
}
|
|
|
|
#define __HAVE_ARCH_STRCAT
|
|
static inline char * strcat(char * dest, const char * src)
|
|
{
|
|
char *tmp = dest;
|
|
|
|
while (*dest)
|
|
dest++;
|
|
while ((*dest++ = *src++))
|
|
;
|
|
|
|
return tmp;
|
|
}
|
|
|
|
#define __HAVE_ARCH_STRNCAT
|
|
static inline char * strncat(char *dest, const char *src, size_t count)
|
|
{
|
|
char *tmp = dest;
|
|
|
|
if (count) {
|
|
while (*dest)
|
|
dest++;
|
|
while ((*dest++ = *src++)) {
|
|
if (--count == 0) {
|
|
*dest++='\0';
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
return tmp;
|
|
}
|
|
|
|
#define __HAVE_ARCH_STRCHR
|
|
static inline char * strchr(const char * s, int c)
|
|
{
|
|
const char ch = c;
|
|
|
|
for(; *s != ch; ++s)
|
|
if (*s == '\0')
|
|
return( NULL );
|
|
return( (char *) s);
|
|
}
|
|
|
|
#if 0
|
|
#define __HAVE_ARCH_STRPBRK
|
|
static inline char *strpbrk(const char *cs,const char *ct)
|
|
{
|
|
const char *sc1,*sc2;
|
|
|
|
for( sc1 = cs; *sc1 != '\0'; ++sc1)
|
|
for( sc2 = ct; *sc2 != '\0'; ++sc2)
|
|
if (*sc1 == *sc2)
|
|
return((char *) sc1);
|
|
return( NULL );
|
|
}
|
|
#endif
|
|
|
|
#if 0
|
|
#define __HAVE_ARCH_STRSPN
|
|
static inline size_t strspn(const char *s, const char *accept)
|
|
{
|
|
const char *p;
|
|
const char *a;
|
|
size_t count = 0;
|
|
|
|
for (p = s; *p != '\0'; ++p)
|
|
{
|
|
for (a = accept; *a != '\0'; ++a)
|
|
if (*p == *a)
|
|
break;
|
|
if (*a == '\0')
|
|
return count;
|
|
else
|
|
++count;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
#endif
|
|
|
|
/* strstr !! */
|
|
|
|
#define __HAVE_ARCH_STRLEN
|
|
static inline size_t strlen(const char * s)
|
|
{
|
|
const char *sc;
|
|
for (sc = s; *sc != '\0'; ++sc) ;
|
|
return(sc - s);
|
|
}
|
|
|
|
/* strnlen !! */
|
|
|
|
#define __HAVE_ARCH_STRCMP
|
|
static inline int strcmp(const char * cs,const char * ct)
|
|
{
|
|
char __res;
|
|
|
|
__asm__
|
|
("1:\tmoveb %0@+,%2\n\t" /* get *cs */
|
|
"cmpb %1@+,%2\n\t" /* compare a byte */
|
|
"jne 2f\n\t" /* not equal, break out */
|
|
"tstb %2\n\t" /* at end of cs? */
|
|
"jne 1b\n\t" /* no, keep going */
|
|
"jra 3f\n\t" /* strings are equal */
|
|
"2:\tsubb %1@-,%2\n\t" /* *cs - *ct */
|
|
"3:"
|
|
: "=a" (cs), "=a" (ct), "=d" (__res)
|
|
: "0" (cs), "1" (ct));
|
|
return __res;
|
|
}
|
|
|
|
#define __HAVE_ARCH_STRNCMP
|
|
static inline int strncmp(const char * cs,const char * ct,size_t count)
|
|
{
|
|
char __res;
|
|
|
|
if (!count)
|
|
return 0;
|
|
__asm__
|
|
("1:\tmovb %0@+,%3\n\t" /* get *cs */
|
|
"cmpb %1@+,%3\n\t" /* compare a byte */
|
|
"jne 3f\n\t" /* not equal, break out */
|
|
"tstb %3\n\t" /* at end of cs? */
|
|
"jeq 4f\n\t" /* yes, all done */
|
|
"subql #1,%2\n\t" /* no, adjust count */
|
|
"jne 1b\n\t" /* more to do, keep going */
|
|
"2:\tmoveq #0,%3\n\t" /* strings are equal */
|
|
"jra 4f\n\t"
|
|
"3:\tsubb %1@-,%3\n\t" /* *cs - *ct */
|
|
"4:"
|
|
: "=a" (cs), "=a" (ct), "=d" (count), "=d" (__res)
|
|
: "0" (cs), "1" (ct), "2" (count));
|
|
return __res;
|
|
}
|
|
|
|
#define __HAVE_ARCH_MEMSET
|
|
/*
|
|
* This is really ugly, but its highly optimizatiable by the
|
|
* compiler and is meant as compensation for gcc's missing
|
|
* __builtin_memset(). For the 680[23]0 it might be worth considering
|
|
* the optimal number of misaligned writes compared to the number of
|
|
* tests'n'branches needed to align the destination address. The
|
|
* 680[46]0 doesn't really care due to their copy-back caches.
|
|
* 10/09/96 - Jes Sorensen
|
|
*/
|
|
static inline void * __memset_g(void * s, int c, size_t count)
|
|
{
|
|
void *xs = s;
|
|
size_t temp;
|
|
|
|
if (!count)
|
|
return xs;
|
|
|
|
c &= 0xff;
|
|
c |= c << 8;
|
|
c |= c << 16;
|
|
|
|
if (count < 36){
|
|
long *ls = s;
|
|
|
|
switch(count){
|
|
case 32: case 33: case 34: case 35:
|
|
*ls++ = c;
|
|
case 28: case 29: case 30: case 31:
|
|
*ls++ = c;
|
|
case 24: case 25: case 26: case 27:
|
|
*ls++ = c;
|
|
case 20: case 21: case 22: case 23:
|
|
*ls++ = c;
|
|
case 16: case 17: case 18: case 19:
|
|
*ls++ = c;
|
|
case 12: case 13: case 14: case 15:
|
|
*ls++ = c;
|
|
case 8: case 9: case 10: case 11:
|
|
*ls++ = c;
|
|
case 4: case 5: case 6: case 7:
|
|
*ls++ = c;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
s = ls;
|
|
if (count & 0x02){
|
|
short *ss = s;
|
|
*ss++ = c;
|
|
s = ss;
|
|
}
|
|
if (count & 0x01){
|
|
char *cs = s;
|
|
*cs++ = c;
|
|
s = cs;
|
|
}
|
|
return xs;
|
|
}
|
|
|
|
if ((long) s & 1)
|
|
{
|
|
char *cs = s;
|
|
*cs++ = c;
|
|
s = cs;
|
|
count--;
|
|
}
|
|
if (count > 2 && (long) s & 2)
|
|
{
|
|
short *ss = s;
|
|
*ss++ = c;
|
|
s = ss;
|
|
count -= 2;
|
|
}
|
|
temp = count >> 2;
|
|
if (temp)
|
|
{
|
|
long *ls = s;
|
|
temp--;
|
|
do
|
|
*ls++ = c;
|
|
while (temp--);
|
|
s = ls;
|
|
}
|
|
if (count & 2)
|
|
{
|
|
short *ss = s;
|
|
*ss++ = c;
|
|
s = ss;
|
|
}
|
|
if (count & 1)
|
|
{
|
|
char *cs = s;
|
|
*cs = c;
|
|
}
|
|
return xs;
|
|
}
|
|
|
|
/*
|
|
* __memset_page assumes that data is longword aligned. Most, if not
|
|
* all, of these page sized memsets are performed on page aligned
|
|
* areas, thus we do not need to check if the destination is longword
|
|
* aligned. Of course we suffer a serious performance loss if this is
|
|
* not the case but I think the risk of this ever happening is
|
|
* extremely small. We spend a lot of time clearing pages in
|
|
* get_empty_page() so I think it is worth it anyway. Besides, the
|
|
* 680[46]0 do not really care about misaligned writes due to their
|
|
* copy-back cache.
|
|
*
|
|
* The optimized case for the 680[46]0 is implemented using the move16
|
|
* instruction. My tests showed that this implementation is 35-45%
|
|
* faster than the original implementation using movel, the only
|
|
* caveat is that the destination address must be 16-byte aligned.
|
|
* 01/09/96 - Jes Sorensen
|
|
*/
|
|
static inline void * __memset_page(void * s,int c,size_t count)
|
|
{
|
|
unsigned long data, tmp;
|
|
void *xs = s;
|
|
|
|
c = c & 255;
|
|
data = c | (c << 8);
|
|
data |= data << 16;
|
|
|
|
#ifdef CPU_M68040_OR_M68060_ONLY
|
|
|
|
if (((unsigned long) s) & 0x0f)
|
|
__memset_g(s, c, count);
|
|
else{
|
|
unsigned long *sp = s;
|
|
*sp++ = data;
|
|
*sp++ = data;
|
|
*sp++ = data;
|
|
*sp++ = data;
|
|
|
|
__asm__ __volatile__("1:\t"
|
|
".chip 68040\n\t"
|
|
"move16 %2@+,%0@+\n\t"
|
|
".chip 68k\n\t"
|
|
"subqw #8,%2\n\t"
|
|
"subqw #8,%2\n\t"
|
|
"dbra %1,1b\n\t"
|
|
: "=a" (sp), "=d" (tmp)
|
|
: "a" (s), "0" (sp), "1" ((count - 16) / 16 - 1)
|
|
);
|
|
}
|
|
|
|
#else
|
|
__asm__ __volatile__("1:\t"
|
|
"movel %2,%0@+\n\t"
|
|
"movel %2,%0@+\n\t"
|
|
"movel %2,%0@+\n\t"
|
|
"movel %2,%0@+\n\t"
|
|
"movel %2,%0@+\n\t"
|
|
"movel %2,%0@+\n\t"
|
|
"movel %2,%0@+\n\t"
|
|
"movel %2,%0@+\n\t"
|
|
"dbra %1,1b\n\t"
|
|
: "=a" (s), "=d" (tmp)
|
|
: "d" (data), "0" (s), "1" (count / 32 - 1)
|
|
);
|
|
#endif
|
|
|
|
return xs;
|
|
}
|
|
|
|
extern void *memset(void *,int,__kernel_size_t);
|
|
|
|
#define __memset_const(s,c,count) \
|
|
((count==PAGE_SIZE) ? \
|
|
__memset_page((s),(c),(count)) : \
|
|
__memset_g((s),(c),(count)))
|
|
|
|
#define memset(s, c, count) \
|
|
(__builtin_constant_p(count) ? \
|
|
__memset_const((s),(c),(count)) : \
|
|
__memset_g((s),(c),(count)))
|
|
|
|
#define __HAVE_ARCH_MEMCPY
|
|
extern void * memcpy(void *, const void *, size_t );
|
|
/*
|
|
* __builtin_memcpy() does not handle page-sized memcpys very well,
|
|
* thus following the same assumptions as for page-sized memsets, this
|
|
* function copies page-sized areas using an unrolled loop, without
|
|
* considering alignment.
|
|
*
|
|
* For the 680[46]0 only kernels we use the move16 instruction instead
|
|
* as it writes through the data-cache, invalidating the cache-lines
|
|
* touched. In this way we do not use up the entire data-cache (well,
|
|
* half of it on the 68060) by copying a page. An unrolled loop of two
|
|
* move16 instructions seem to the fastest. The only caveat is that
|
|
* both source and destination must be 16-byte aligned, if not we fall
|
|
* back to the generic memcpy function. - Jes
|
|
*/
|
|
static inline void * __memcpy_page(void * to, const void * from, size_t count)
|
|
{
|
|
unsigned long tmp;
|
|
void *xto = to;
|
|
|
|
#ifdef CPU_M68040_OR_M68060_ONLY
|
|
|
|
if (((unsigned long) to | (unsigned long) from) & 0x0f)
|
|
return memcpy(to, from, count);
|
|
|
|
__asm__ __volatile__("1:\t"
|
|
".chip 68040\n\t"
|
|
"move16 %1@+,%0@+\n\t"
|
|
"move16 %1@+,%0@+\n\t"
|
|
".chip 68k\n\t"
|
|
"dbra %2,1b\n\t"
|
|
: "=a" (to), "=a" (from), "=d" (tmp)
|
|
: "0" (to), "1" (from) , "2" (count / 32 - 1)
|
|
);
|
|
#else
|
|
__asm__ __volatile__("1:\t"
|
|
"movel %1@+,%0@+\n\t"
|
|
"movel %1@+,%0@+\n\t"
|
|
"movel %1@+,%0@+\n\t"
|
|
"movel %1@+,%0@+\n\t"
|
|
"movel %1@+,%0@+\n\t"
|
|
"movel %1@+,%0@+\n\t"
|
|
"movel %1@+,%0@+\n\t"
|
|
"movel %1@+,%0@+\n\t"
|
|
"dbra %2,1b\n\t"
|
|
: "=a" (to), "=a" (from), "=d" (tmp)
|
|
: "0" (to), "1" (from) , "2" (count / 32 - 1)
|
|
);
|
|
#endif
|
|
return xto;
|
|
}
|
|
|
|
#define __memcpy_const(to, from, n) \
|
|
((n==PAGE_SIZE) ? \
|
|
__memcpy_page((to),(from),(n)) : \
|
|
__builtin_memcpy((to),(from),(n)))
|
|
|
|
#define memcpy(to, from, n) \
|
|
(__builtin_constant_p(n) ? \
|
|
__memcpy_const((to),(from),(n)) : \
|
|
memcpy((to),(from),(n)))
|
|
|
|
#define __HAVE_ARCH_MEMMOVE
|
|
static inline void * memmove(void * dest,const void * src, size_t n)
|
|
{
|
|
void *xdest = dest;
|
|
size_t temp;
|
|
|
|
if (!n)
|
|
return xdest;
|
|
|
|
if (dest < src)
|
|
{
|
|
if ((long) dest & 1)
|
|
{
|
|
char *cdest = dest;
|
|
const char *csrc = src;
|
|
*cdest++ = *csrc++;
|
|
dest = cdest;
|
|
src = csrc;
|
|
n--;
|
|
}
|
|
if (n > 2 && (long) dest & 2)
|
|
{
|
|
short *sdest = dest;
|
|
const short *ssrc = src;
|
|
*sdest++ = *ssrc++;
|
|
dest = sdest;
|
|
src = ssrc;
|
|
n -= 2;
|
|
}
|
|
temp = n >> 2;
|
|
if (temp)
|
|
{
|
|
long *ldest = dest;
|
|
const long *lsrc = src;
|
|
temp--;
|
|
do
|
|
*ldest++ = *lsrc++;
|
|
while (temp--);
|
|
dest = ldest;
|
|
src = lsrc;
|
|
}
|
|
if (n & 2)
|
|
{
|
|
short *sdest = dest;
|
|
const short *ssrc = src;
|
|
*sdest++ = *ssrc++;
|
|
dest = sdest;
|
|
src = ssrc;
|
|
}
|
|
if (n & 1)
|
|
{
|
|
char *cdest = dest;
|
|
const char *csrc = src;
|
|
*cdest = *csrc;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
dest = (char *) dest + n;
|
|
src = (const char *) src + n;
|
|
if ((long) dest & 1)
|
|
{
|
|
char *cdest = dest;
|
|
const char *csrc = src;
|
|
*--cdest = *--csrc;
|
|
dest = cdest;
|
|
src = csrc;
|
|
n--;
|
|
}
|
|
if (n > 2 && (long) dest & 2)
|
|
{
|
|
short *sdest = dest;
|
|
const short *ssrc = src;
|
|
*--sdest = *--ssrc;
|
|
dest = sdest;
|
|
src = ssrc;
|
|
n -= 2;
|
|
}
|
|
temp = n >> 2;
|
|
if (temp)
|
|
{
|
|
long *ldest = dest;
|
|
const long *lsrc = src;
|
|
temp--;
|
|
do
|
|
*--ldest = *--lsrc;
|
|
while (temp--);
|
|
dest = ldest;
|
|
src = lsrc;
|
|
}
|
|
if (n & 2)
|
|
{
|
|
short *sdest = dest;
|
|
const short *ssrc = src;
|
|
*--sdest = *--ssrc;
|
|
dest = sdest;
|
|
src = ssrc;
|
|
}
|
|
if (n & 1)
|
|
{
|
|
char *cdest = dest;
|
|
const char *csrc = src;
|
|
*--cdest = *--csrc;
|
|
}
|
|
}
|
|
return xdest;
|
|
}
|
|
|
|
#define __HAVE_ARCH_MEMCMP
|
|
extern int memcmp(const void * ,const void * ,size_t );
|
|
#define memcmp(cs, ct, n) \
|
|
(__builtin_constant_p(n) ? \
|
|
__builtin_memcmp((cs),(ct),(n)) : \
|
|
memcmp((cs),(ct),(n)))
|
|
|
|
#define __HAVE_ARCH_MEMCHR
|
|
static inline void *memchr(const void *cs, int c, size_t count)
|
|
{
|
|
/* Someone else can optimize this, I don't care - tonym@mac.linux-m68k.org */
|
|
unsigned char *ret = (unsigned char *)cs;
|
|
for(;count>0;count--,ret++)
|
|
if(*ret == c) return ret;
|
|
|
|
return NULL;
|
|
}
|
|
|
|
#endif /* _M68K_STRING_H_ */
|