Need help with -m68060 switch on egcs-1.1b
Wed Dec 2 06:17:00 GMT 1998
On Wed, 2 Dec 1998, Jyrki O Saarinen wrote:
> > I agree that this is undesirable behavior on an embedded system and should
> > be reported.
> > So this is a bug in gcc 2.x, not in egcs, right?
> Right, egcs doesn't use 32x32->64 muls for int-int muls. I wonder
> why gcc did that.. wastes one register for the upper 32 bits of the
> result for nothing. This would be different:
> long long result = (long long)(a * b);
> /* a, b are ints */
It also makes it impossible to look at a piece of code and say
definitively that it does not use the FPU.
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