http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55016
--- Comment #2 from vincenzo Innocente <vincenzo.innocente at cern dot ch> 2012-10-23 05:19:37 UTC --- For the application I have in mind a global flag will such as -ffaster-math will not be suitable as it would affect also places where full "single precision" is still required. I would like just to profit of the rcp and rsqrt instructions for cases where their low "precision" is enough.