Given the logic below, what would you expect for result?
unsigned long test (unsigned long x, signed short y, signed short z)
{
return x + (signed long) (y - z) * 10;
}
result = test (10, 0, 1);
CW5, CW6 (Optimization level 0) and VC++ 5.0 all give result = 0.
CW6 (Optimization levels 1-4) give result = 655360 (0x000a0000).
The suspect code generated is:
move.w 12(a6),d0
sub.w 14(a6),d0
mulu.w #10,d0 <---- should be muls.w?
add.l 8(a6),d0
Stephen Best
Bitware Australia
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