> > Any ideas for better version? If not I will go ahead with this variant and > > increase profile probability base. > > Why not use GCC wide int?
Because I would like to keep operations fast on in common case where overflows do not happen. There was at least one case (the propagation of probabilities to frequencies) where this was compilation time critical. This particular code runs on sreals but similar type of propagation is done by rtl expansion (on smaller scale) But using wide int is what i do as fallback- see if multiplication fits in 64bit arithmetics, if 128bit arithmetics is available and go for wide int otherwise. Honza
