[libre-riscv-dev] daily kan-ban update 02jun2020

[Luke Kenneth Casson Leighton]

yesterday:

* got Branch CompUnit test on par with its equivalent test_pipe_caller.py
* swapped RS from position "3" to position "1" (read port 1) on all Logical ops,
  OP_EXTS, and MTCRF
* started on ShiftRot CompUnit test.  fixed bugs, discovered that sraw is
  not setting CA/CA32, discovered that "rlwinm." is not implemented.
* fixed a bug in the CompUnit testing where the source operands were not
   zero'd.  ALUs picked up and used *old* operands (from a previous instruction)
* fixed two mask-related bugs in MultiCompUnit
* started on the linking of CompUnits to regfiles, through understanding of
   the relationship between CompUnits, regspecs, and Decode2Execute1Type.

today:

* getting Decode2Execute1Type to "understand" regspecs: to provide the
  "accessor" register information in the RegSpec API, so that it becomes
  dead simple to connect Decoder, CompUnits, and Regfiles.

l.

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