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Merge pull request #193 from gsomlo/gls-memcpy-fix 

software/libbase: memcpy: simple, arch-width agnostic implementation
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enjoy-digital 2019-06-04 21:49:18 +02:00 committed by GitHub
parent 42e9d09755 f88b85a31c
commit cb2d4372e4
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 5 additions and 64 deletions
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69
litex/soc/software/libbase/libc.c
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@ -293,71 +293,12 @@ void *memset(void *s, int c, size_t count)
*/
void *memcpy(void *to, const void *from, size_t n)
{
void *xto = to;
size_t temp;
char *tmp = to;
const char *s = from;
if(!n)
return xto;
if((long)to & 1) {
char *cto = to;
const char *cfrom = from;
*cto++ = *cfrom++;
to = cto;
from = cfrom;
n--;
}
if((long)from & 1) {
char *cto = to;
const char *cfrom = from;
for (; n; n--)
*cto++ = *cfrom++;
return xto;
}
if(n > 2 && (long)to & 2) {
short *sto = to;
const short *sfrom = from;
*sto++ = *sfrom++;
to = sto;
from = sfrom;
n -= 2;
}
if((long)from & 2) {
short *sto = to;
const short *sfrom = from;
temp = n >> 1;
for (; temp; temp--)
*sto++ = *sfrom++;
to = sto;
from = sfrom;
if(n & 1) {
char *cto = to;
const char *cfrom = from;
*cto = *cfrom;
}
return xto;
}
temp = n >> 2;
if(temp) {
long *lto = to;
const long *lfrom = from;
for(; temp; temp--)
*lto++ = *lfrom++;
to = lto;
from = lfrom;
}
if(n & 2) {
short *sto = to;
const short *sfrom = from;
*sto++ = *sfrom++;
to = sto;
from = sfrom;
}
if(n & 1) {
char *cto = to;
const char *cfrom = from;
*cto = *cfrom;
}
return xto;
while (n--)
*tmp++ = *s++;
return to;
}
/**