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   pinskia (pinskia@hachyderm.io)'s status on Sunday, 24-Nov-2024 07:02:14 JST pinskia

   in reply to

   • Chris Green

   @aachrisg Same is true even on aarch64:
   https://godbolt.org/z/TWenG8vbh

   • Embed this notice
     Chris Green (aachrisg@mastodon.gamedev.place)'s status on Sunday, 24-Nov-2024 07:02:19 JST Chris Green

     D-oh:

     std:fma will generate the fused multiply add instruction in MSVC and GCC, regardless of the setting of fp:precise as you would hope..

     But MSVC doesn't know how to auto vectorize it, which kind of defeats the purpose :-( :-(. GCC does though (as does Clang):

     https://godbolt.org/z/4f91hWKEE