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Re: Scheduling and inserting NOPs
Boris Boesler <firstname.lastname@example.org> writes:
> Am 13.11.2007 um 19:14 schrieb Ian Lance Taylor:
> > Boris Boesler <email@example.com> writes:
> >> 1) As far as I can see some levels of optimization do not schedule
> >> the code. To generate correct code I have to insert NOP-operations to
> >> fill the delays (the architecture has no interlocks),
> > gcc is weak on VLIW support. The scheduler does not insert NOPs for
> > you.
> VLIWs? As I mentioned above the processor does not wait till the
> operands are evaluated; this must be done by the programmer/compiler
> by inserting NOPs or other instructions.
It amounts to the same thing: you need to insert NOP instructions.