Hardware
/
litex
mirror of https://github.com/enjoy-digital/litex.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

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

software/libbase: memcpy: simple, arch-width agnostic implementation
This commit is contained in:
enjoy-digital 2019-06-04 21:49:18 +02:00 committed by GitHub
parent 42e9d09755 f88b85a31c
commit cb2d4372e4
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 5 additions and 64 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

69
litex/soc/software/libbase/libc.c
View File

@ -293,71 +293,12 @@ void *memset(void *s, int c, size_t count)
*/ */
void *memcpy(void *to, const void *from, size_t n) void *memcpy(void *to, const void *from, size_t n)
{ {
void *xto = to; char *tmp = to;
size_t temp; const char *s = from;
if(!n) while (n--)
return xto; *tmp++ = *s++;
if((long)to & 1) { return to;
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;
} }
/** /**