[Libre-soc-isa] [Bug 533] design new CR instructions suitable for predication

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Mon Nov 30 00:26:12 GMT 2020


Luke Kenneth Casson Leighton <lkcl at lkcl.net> changed:

           What    |Removed                     |Added
           Assignee|lkcl at lkcl.net               |programmerjake at gmail.com

--- Comment #8 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
jacob it occurred to me that if we either:
* use a different XO set for crops
* use bit 31 to indicate

then under these circumstances bits 6-10 could be taken to be RT (int regfile).

note that the current crops actually use 4 bits of XO as a truth table lookup,
using 2 bits each from BA and BB. very smart, very elegant.

then whenever crops are used the last one can be to target an integer.

alternative ideas: allow targetting of both int and CR.

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