[Libre-soc-bugs] [Bug 1044] SVP64 implementation of pow(x,y,z)

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=1044

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

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--- Comment #17 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
(In reply to Jacob Lifshay from comment #15)

> basically, it's a combined subtraction-comparison all-in-one.

love it.

this is the key work:
https://git.libre-soc.org/?p=openpower-isa.git;a=commitdiff;h=85abafd4

this is what we are aiming for - first with svindex and then using
that to drive the development of bigmul REMAP and then come back and
replace Indexed REMAP.

loop-unrolling in SVP64 assembler is a "no-no". if it's "needed" then
it means something's seriously wrong and we need to activate "redesign
SVP64" procedures to make sure that the loop-unrolling is definitely,
definitely *not* needed.

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