[Libre-soc-bugs] [Bug 838] sync or at least statically check fields.text, power_decoder, trans/svp64, CSVs between each other

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=838

--- Comment #27 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
 364             fields += [(self.__section.opcode, 0, 5)]

that can be converted to (mask, value) form.  opcode, 0b111111
although a case can be made for keeping the start/end thing
and maybe even converting mask *into* start and end.

 368         if self.name.endswith("."):
 369             fields += [(1, 31, 31)]

ah no.  definitely not.

1) some Rc=1 instructions *do not* use bit 31
2) some instructions (stcix. or atomics somewhere) it is implicit
   (i.e. there is no non-Rc version)
3) Rc=1 field extraction is often done elsewhere i.e. by manual
   recognition of the bit.

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