[Libre-soc-isa] [Bug 1023] New: crternlut/crbinlut analysis needed of CR regfile usage

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=1023

            Bug ID: 1023
           Summary: crternlut/crbinlut analysis needed of CR regfile usage
           Product: Libre-SOC's first SoC
           Version: unspecified
          Hardware: Other
                OS: Linux
            Status: CONFIRMED
          Severity: enhancement
          Priority: ---
         Component: Specification
          Assignee: lkcl at lkcl.net
          Reporter: lkcl at lkcl.net
                CC: libre-soc-isa at lists.libre-soc.org
   NLnet milestone: ---

the number of CR operands if done as 4-wide CR Field Hazard protection
comes out as 4-in 1-out. this is too much. however if the CR is considered
32-bit then both instructions are consideredc1-in 1-out.

the complication comes for SVP64. some discussion and analysis of
architectural options is needed.

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