[libc-commits] [PATCH] D152923: [libc] Add support for FMA in the GPU utilities

[Matt Arsenault via Phabricator via libc-commits]

arsenm added a comment.

> These may not have strict compliance

I expect every FMA instruction in existence to be strictly compliant. There's not even errno to worry about. For AMDGPU FP exceptions should even work with strictfp



================
Comment at: libc/src/__support/FPUtil/gpu/FMA.h:13-15
+// For AMDGPU these will map to instructions with 0.5 ULP accuracy. The NVPTX
+// implementation performs this operation at infinite precision and then rounds
+// to the nearest even value.
----------------
The NVPTX description sounds like you're just describing what FMA is


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D152923/new/

https://reviews.llvm.org/D152923