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Re: ideas for modeling pipeline with bypass registers?
- From: Greg McGary <greg at mcgary dot org>
- To: "Nitin Gupta--SSW, Noida" <nitingup at noida dot hcltech dot com>
- Cc: gcc at gcc dot gnu dot org, greg at mcgary dot org
- Date: 29 Jul 2003 11:12:01 -0700
- Subject: Re: ideas for modeling pipeline with bypass registers?
- References: <E04CF3F88ACBD5119EFE00508BBB21210AE4FDBD@EXCH-01>
"Nitin Gupta--SSW, Noida" <nitingup@noida.hcltech.com> writes:
> > No. It doesn't make sense to allocate it because it has a fixed,
> > limited, machine-defined use and isn't available for other purposes.
> How many such registers do you have in your target?
I don't see how it matters at the level of abstraction we are dealing
with, but there are three functional-units: adder, barrel-shifter,
logic, and each has a bypass register.
Greg