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antonblanchard.microwatt/multiply.vhdl
Paul Mackerras f1238299bd execute1: Take an extra cycle for OE=1 multiply instructions
We now expect the overflow signal from the multiplier to come along
one cycle later than the product.

This breaks up a long combinatorial path and improves timing.

This also changes some uses of v.<field> to r.<field> in the slow
op logic, which should help timing as well.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
2020-08-05 15:49:12 +10:00

2.6 KiB