emul-cache: Cache instruction decoding #527
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matthiasgoergens
requested changes
Nov 4, 2024
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Issue #524
This is an approach to accelerate decoding. The original idea was to pre-decode all instructions of the program.
This PR does it by caching instead. It caches from instruction word to decoded structure. This may make the emulator marginally faster; did not benchmark.
In principle it could cache from PC to decoded, saving one hash table lookup. However, that’s a little more complicated because you’d need to change the tracer too.