[Libre-soc-isa] [Bug 817] Big Integer Math (sv.adde, sv.subfe, sv.madded, 128 by 64-bit -> 64-bit div/rem, maybe more...)

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Wed Oct 12 21:58:26 BST 2022


https://bugs.libre-soc.org/show_bug.cgi?id=817

--- Comment #55 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
https://git.libre-soc.org/?p=openpower-isa.git;a=commitdiff;h=13dd59db06e7c5ed50d25fd513ff540b72151eb6

sv.divmod2du works, /mrr (reverse-gear) has to be used, to
get from high-end down to low-end, exactly as in Knuth Algorithm D.

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