10 |
char *q = dst; |
char *q = dst; |
11 |
#if defined(__i386__) || defined(__x86_64__) |
#if defined(__i386__) || defined(__x86_64__) |
12 |
if (q < p) { |
if (q < p) { |
13 |
asm volatile("cld ; rep ; movsb" |
asm volatile("cld; rep; movsb" |
14 |
: "+c" (n), "+S"(p), "+D"(q)); |
: "+c" (n), "+S"(p), "+D"(q)); |
15 |
} else { |
} else { |
16 |
p += (n - 1); |
p += (n - 1); |
17 |
q += (n - 1); |
q += (n - 1); |
18 |
asm volatile("std ; rep ; movsb" |
asm volatile("std; rep; movsb; cld" |
19 |
: "+c" (n), "+S"(p), "+D"(q)); |
: "+c" (n), "+S"(p), "+D"(q)); |
20 |
} |
} |
21 |
#else |
#else |