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Implement CSR #18

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rjlv2 opened this issue Oct 12, 2018 · 2 comments
Open

Implement CSR #18

rjlv2 opened this issue Oct 12, 2018 · 2 comments

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@rjlv2
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rjlv2 commented Oct 12, 2018

Need to implement and test CSR instructions.
@phillipstanleymarbell phillipstanleymarbell transferred this issue from another repository May 5, 2019
@rjlv2
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rjlv2 commented May 20, 2019

Currently simple registers act as placeholders for the actual implementation.

@harrysarson
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Worth noting: in the latest spec version (https://github.com/riscv/riscv-isa-manual/releases/latest) CSR registers are no longer in the base RV32I so we could possibly justify not supporting them.

I quote from chapter 9:

The counters and timers are no longer considered mandatory parts of the standard base
ISAs, and so the CSR instructions required to access them have been moved out of the base ISA
chapter into this separate chapte

@harrysarson harrysarson mentioned this issue May 21, 2019
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@rjlv2 @harrysarson