[clang] [llvm] [NVPTX] Cleanup and document nvvm.fabs intrinsics, adding f16 support (PR #135644)

[Alex MacLean via cfe-commits]

================
@@ -1034,6 +1034,10 @@ Value *CodeGenFunction::EmitNVPTXBuiltinExpr(unsigned 
BuiltinID,
   case NVPTX::BI__nvvm_fmin_xorsign_abs_f16x2:
     return MakeHalfType(Intrinsic::nvvm_fmin_xorsign_abs_f16x2, BuiltinID, E,
                         *this);
+  case NVPTX::BI__nvvm_abs_bf16:
+  case NVPTX::BI__nvvm_abs_bf16x2:
+    return Builder.CreateUnaryIntrinsic(Intrinsic::nvvm_fabs,
----------------
AlexMaclean wrote:

Sounds good, I've added the f16 variants.

https://github.com/llvm/llvm-project/pull/135644
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