On Tue, 11 Mar 2003, Andrew Morton wrote:
>
> 2.95.3 and 3.2.1 seem to do it right?
Well, they do, but your test case is wrong:
> long a;
> long b;
> long long c;
>
> void foo(void)
> {
> c = a * b;
This is just a 32*32->32 multiply, with a final sign extension to 64 bits.
You need to do
c = (long long) a * b;
to get a 32*32->64 multiply. And yes, gcc gets that case right.
Linus
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