http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55016
--- Comment #1 from Marc Glisse <glisse at gcc dot gnu.org> 2012-10-22 18:56:42
UTC ---
(In reply to comment #0)
> void v() {
> for(int i=0; i!=1024; ++i)
> v0[i] = rsqrtf(v1[i]);
> }
Doesn't writing
v0[i] = 1 / sqrtf(v1[i])
work with suitable fast-math flags? It still produces an extra iteration to
refine the result, do we want a -ffaster-math?
