[Libre-soc-isa] [Bug 650] write rfc for OpenPower fpr <-> gpr moves/conversions

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=650

--- Comment #7 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
(In reply to Luke Kenneth Casson Leighton from comment #6)
>     0-5   | 6-10 | 11-24 | 25-30 | 31
>     Major | FRT  | UI    | XO    | UI0
> 
> if two columns of Minor 19 are used it becomes possible
> to fit the entire BF16

nope. wrong.

    0-5   | 6-10 | 11-25 | 26-30 | 31
    Major | FRT  | UI    | XO    | UI0

* 26-30 is five. top half of XO like in addpcis
* 11-25 is fifteen
* plus bit 31 is sixteen bits.

no need for 2 columns, just one will do

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