Hi guys,
I played with result differences on 32/64 bit systems today, and here is
something interesting revealed by one sputnik test:
sputnik/Conformance/15_Native_Objects/15.8_Math/15.8.2/15.8.2.16_sin/S15.8.2.16_A7.html
Try this snippet on a 32 and a 64 bit system:
#include <math.h>
#include <stdio.h>
int main()
{
int i;
double d = 6.283185307179586, k;
for (i = 0; i < 10000000; ++i)
k = sin(d);
return 0;
}
The 32 bit is 15x faster. Why? Because it simply calls fsin, while the 64
bit has an own SSE2 based implementation. I know x87 is obsolote and
everything, but it is 15x faster... Shall we optimize this?
Regards,
Zoltan
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