On 25/04/2018 13:27, Игорь Сотниченко wrote: > Hello! > > 1. There is a decent difference between calculations on Visual studio > compiler and gcc 7.1 in calculation result of my program. Floating point or integer computation? Getting identical FP results on different platforms is a chimera. > 2. When optimization in gcc are disabled, then there is no > difference. > > 3. When I have replaced O2 with keys from O1 and O2 ( > https://gcc.gnu.org/onlinedocs/gcc/Optimize-Options.html), then there is no > difference in results, but there is a calculation speed degradation > compared to O2. It is easier to discuss code when actual code is provided ;-) Regards.
