On 11/5/18 11:27 AM, Joseph Myers wrote: > On Sun, 4 Nov 2018, Jeff Law wrote: > >> Don't we have a flag specific to honoring nans? Would that be better to >> use than flag_unsafe_math_optimizations? As Uli mentioned, there's > > That's only relevant for the comparison optimization, of course. > > Converting erfc to 1-erf is dubious, since the whole point of erfc is for > cases where 1-erf is inaccurate. (Conversion in the other direction also > needs flag_unsafe_math_optimizations.) > Understood. Thanks for clarifying. It seems like unsafe-math-optimization is a better fit than the nan specific flag.
jeff
