On Monday, 24 January 2022 10:36:41 PST Konstantin Shegunov wrote: > *My* code, is supposed to fix Qt code at some point, so that's why I'm > asking. I know I have to do it myself for user code, that's not an issue.
If you're talking about code in Qt, simply use std::fma and it'll do the right thing. It becomes my problem to optimise it so we get the shortest code emission, not yours. The compilers also convert *some* instances of plain multiplication followed by addition into FMA. That depends on compiler flags, often enough, because of differences in rounding. -- Thiago Macieira - thiago.macieira (AT) intel.com Software Architect - Intel DPG Cloud Engineering _______________________________________________ Development mailing list Development@qt-project.org https://lists.qt-project.org/listinfo/development
