[Libre-soc-isa] [Bug 923] we missed some important fp ops

[bugzilla-daemon at libre-soc.org]

https://bugs.libre-soc.org/show_bug.cgi?id=923

--- Comment #6 from Luke Kenneth Casson Leighton <lkcl at lkcl.net> ---
hang on...
p181 v3.1 there's notes

if a >= b then x <- y  fsub fs,fa,fb
else x <- z            fsel fx,fs,fy,fz

so no, we can't add fmaxss or fminss,
they'll get rejected because of the
macro-fusion advice.

the only reason to add fminss/fmaxss/fmin/fmax
would be because updating to IEEE754-2019. which
is probably good enough.


----

https://stackoverflow.com/questions/30618991/simd-minmag-and-maxmag

minmag(a,b) = |a|<|b| ? a : b
maxmag(a,b) = |a|>|b| ? a : b

not seeing anything like this - good idea to add them.

---

fmod

https://codebrowser.dev/glibc/glibc/sysdeps/ieee754/flt-32/e_fmodf.c.html

blerk!  that's awful! (i mean, the software).  yep, good call.

----

remainder

https://stackoverflow.com/questions/26671975/why-do-we-need-ieee-754-remainder

blerk. i don;t get it. but i can understand other people do :)

----

yep all good here.

-- 
You are receiving this mail because:
You are on the CC list for the bug.