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ISA string doesn't allow underscore separators #151

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Timmmm opened this issue Oct 18, 2023 · 0 comments
Open

ISA string doesn't allow underscore separators #151

Timmmm opened this issue Oct 18, 2023 · 0 comments

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@Timmmm
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Timmmm commented Oct 18, 2023

The constants.isa_regex requires the sub-extensions (Z..., S...) to immediately follow the main extensions without a separating underscore. For example this is considered valid:

RV32IMAFCSUZicsr_Zifencei_Zba_Zbb_Zbs

But this is not:

RV32IMAFCSU_Zicsr_Zifencei_Zba_Zbb_Zbs

Both are legal according to the spec. The latter is also easier to read and generate.
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@Timmmm