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

[bugzilla-daemon at libre-soc.org]

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

--- Comment #6 from Jacob Lifshay <programmerjake at gmail.com> ---
(In reply to Jacob Lifshay from comment #5)
> imho we should copy TLI-form:
> |0   |6   |9  |11   |14 |16      |21   |29  |31 |
> | PO | BF |msk| BFA |msk| RB/BFB | TLI | XO |Rc |
> 
> except we don't need Rc, so:
> 
> |0   |6   |9  |11   |14 |16      |21   |28  |31 |
> | PO | BF |msk| BFA |msk| RB/BFB | TLI | XO |TLI|
> 
> RB/BFB is the LUT.

oh, actually we only ever need BFB for crternlogi, so two more bits of XO by
moving TLI bits over more.

crbinlog is what needs RB/BFB where we can use almost the entire space used by
TLI for XO, just need one bit for nh, which should match binlog's nh.

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