I would like to know how to get a vector FMA with GCC in a portable way. By "portable way", I mean that the behavior must not depend on the compilation options (e.g., if FP contraction is disabled, I still want a true FMA) and that the code must not depend on the architecture (thus intrinsics should not be used... even when restricting to x86, one reason is FMA3 vs FMA4 issues). For instance, for addition, one can write "a + b". But for FMA? Thanks, -- Vincent Lefèvre <vincent@xxxxxxxxxx> - Web: <https://www.vinc17.net/> 100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/> Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
