[Libre-soc-bugs] [Bug 583] Implement simple VL for-loop in nMigen for TestIssuer

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=583

--- Comment #39 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
also:

* FETCH FSM will initiate handshake to ISSUE FSM

* ISSUE FSM will initiate handshake to EXECUTE FSM

* EXECUTE FSM will initiate handshake back to ISSUE FSM on completion
  - and also set (optionally) pc_changed, insn_done, and (optionally)
    sv_changed

* ISSUE FSM checks loop conditions.  if exiting it will *PASS ON*
  insn_done and pc_changed to FETCH FSM, and initiate
  handshake back to ISSUE FSM

it is important that there be a split there, insn_done is probably
enough... 

https://git.libre-soc.org/?p=soc.git;a=blob;f=src/soc/simple/issuer.py;h=5ec00ca4ac6ccac038d6ca1f5b05dae413a191e6;hb=09b5ec626157143d593cb294f664a4b611937d0c#l258

yes it is.

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