[Bug target/30652] SSE expansion is missing for isinf() and other fpclassify functions

[ghazi at gcc dot gnu dot org]

------- Comment #5 from ghazi at gcc dot gnu dot org  2007-06-16 03:44 -------
(In reply to comment #2)
> The generic implementation, including for SSE, is 
>   isgreater (abs(f), FLT_MAX)
> For isfinite, use islessequal instead.  For isnan, one can use 
>   isunordered(f, f)
> For isnormal, it'd be
>   isgreaterequal(abs(f), FLT_MIN) & islessequal(abs(f), FLT_MAX)
> which is less likely to be friendly to inline.

Generic isinf implementation here:
http://gcc.gnu.org/ml/gcc-patches/2007-06/msg01103.html


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30652