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[ISAC] Add CMO Support #578

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[ISAC] Add CMO Support #578

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trdthg
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@trdthg trdthg commented Dec 12, 2024

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Add decoder support for CBO extension ('cbo.clean', 'cbo.flush', 'cbo.inval', 'cbo.zero', 'prefetch.i','prefetch.r','prefetch.w')

I achieved 100% test coverage during testing, so I think the decoder is fine.

One thing to note is that the encoding of the prefetch instruction is the same as ori, the only difference is that the rd of prefetch must be 0, so it is handled in arithi_ops

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