tra added inline comments.
================
Comment at: clang/include/clang/Basic/TargetInfo.h:1418
+ /// Whether floating point atomic fetch add/sub is supported.
+ virtual bool isFPAtomicFetchAddSubSupported() const { return false; }
+
----------------
yaxunl wrote:
> tra wrote:
> > I think it should be predicated on specific type.
> > E.g. NVPTX supports atomic ops on fp32 ~everywhere, but fp64 atomic add/sub
> > is only supported on newer GPUs.
> > And then there's fp16...
> will do and add tests for fp16
The number of bits alone may not be sufficient to differentiate the FP variants.
E.g. 16-bit floats currently have 2 variants: IEEE FP16 and BFloat16 (supported
by intel and newer NVIDIA GPUs).
CUDA-11 has introduced TF32 FP format, so we're likely to have more than one
32-bit FP type, too.
I think PPC has an odd `long double` variant represented as pair of 64-bit
doubles.
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D71726/new/
https://reviews.llvm.org/D71726
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