• Jonathan Crapuchettes (4/4) Aug 22 2012 Might anyone from this forum have some thoughts for this problem?
• bearophile (18/21) Aug 22 2012 There are some mistakes in that asm code:

Jonathan Crapuchettes <jcrapuchettes gmail.com> writes:

Might anyone from this forum have some thoughts for this problem?
http://stackoverflow.com/questions/12082561/sse2-movddup-not-moving-values

Thanks,
JC

"bearophile" <bearophileHUGS lycos.com> writes:

Jonathan Crapuchettes:
 Might anyone from this forum have some thoughts for this 
 problem?
 http://stackoverflow.com/questions/12082561/sse2-movddup-not-moving-values

There are some mistakes in that asm code:

import core.stdc.stdio: printf;
import core.cpuid: sse3;
void main() {
     assert(sse3());
     double d = 1.0 / 2;
     auto a = new double[2];
     auto aptr = a.ptr;

     asm {
         mov ESI, aptr;
         movddup XMM0, d;
         movupd [ESI], XMM0;
     }

     printf("%f %f\n", a[0], a[1]);
}


Bye,
bearophile