I'm using Keil C Compiler, v5.02a. Does anything strange happen when I do something like:

int x;
int y;
long result;
.
.
.
.
result = x*y;

I'm working on the motion-estimation portion of an mpeg-2 encoder. I've written a version that runs on an intel-chip and a version that runs on the 8051. For some reason, I'm getting different results when I'm supposed to get the exact same results. Any ideas?