[Mesa3d-dev] [PATCH] glsl: optimize sqrt

[Marek O. <ma...@gm...>]

We were talking a bit on IRC that the GLSL compiler implements the sqrt
function somewhat inefficiently. Instead of rsq+rcp+cmp instructions as is
in the original code, the proposed patch uses just rsq+mul. Please see the
patch log for further explanation, and please review.

-Marek