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Note in RVA22U64 that Zihpm was optional in RVA20U64 #114

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Note in RVA22U64 that Zihpm was optional in RVA20U64 #114

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Expand Up @@ -696,6 +696,8 @@ The following mandatory extensions were present in RVA20U64.
- *Zicntr* Base counters and timers.
- *Zihpm* Hardware performance counters.

NOTE: Zihpm was optional in RVA20U64.

- *Ziccif* Main memory regions with both the cacheability and
coherence PMAs must support instruction fetch, and any instruction
fetches of naturally aligned power-of-2 sizes up to min(ILEN,XLEN)
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