Lines 8-24
Link Here
|
8 |
{ |
8 |
{ |
9 |
const char *p = src; |
9 |
const char *p = src; |
10 |
char *q = dst; |
10 |
char *q = dst; |
11 |
#if defined(__i386__) || defined(__x86_64__) |
11 |
//#if defined(__i386__) || defined(__x86_64__) |
12 |
if (q < p) { |
12 |
// if (q < p) { |
13 |
asm volatile("cld ; rep ; movsb" |
13 |
// asm volatile("cld ; rep ; movsb" |
14 |
: "+c" (n), "+S"(p), "+D"(q)); |
14 |
// : "+c" (n), "+S"(p), "+D"(q)); |
15 |
} else { |
15 |
// } else { |
16 |
p += (n - 1); |
16 |
// p += (n - 1); |
17 |
q += (n - 1); |
17 |
// q += (n - 1); |
18 |
asm volatile("std ; rep ; movsb" |
18 |
// asm volatile("std ; rep ; movsb" |
19 |
: "+c" (n), "+S"(p), "+D"(q)); |
19 |
// : "+c" (n), "+S"(p), "+D"(q)); |
20 |
} |
20 |
// } |
21 |
#else |
21 |
//#else |
22 |
if (q < p) { |
22 |
if (q < p) { |
23 |
while (n--) { |
23 |
while (n--) { |
24 |
*q++ = *p++; |
24 |
*q++ = *p++; |
Lines 30-36
Link Here
|
30 |
*--q = *--p; |
30 |
*--q = *--p; |
31 |
} |
31 |
} |
32 |
} |
32 |
} |
33 |
#endif |
33 |
//#endif |
34 |
|
34 |
|
35 |
return dst; |
35 |
return dst; |
36 |
} |
36 |
} |