[clang] [llvm] [clang][NVPTX] Add builtins and intrinsics for conversions of new FP types (PR #134345)

[Srinivasa Ravi via cfe-commits]

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@@ -703,6 +703,41 @@ let hasSideEffects = false in {
   defm CVT_to_tf32_rz_satf : CVT_TO_TF32<"rz.satfinite", [hasPTX<86>, hasSM<100>]>;
   defm CVT_to_tf32_rn_relu_satf  : CVT_TO_TF32<"rn.relu.satfinite", [hasPTX<86>, hasSM<100>]>;
   defm CVT_to_tf32_rz_relu_satf  : CVT_TO_TF32<"rz.relu.satfinite", [hasPTX<86>, hasSM<100>]>;
+
+  // FP6 conversions.
+  foreach type = ["e2m3x2", "e3m2x2"] in {
+    def CVT_ # type # _f32 : NVPTXInst<(outs Int16Regs:$dst),
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Wolfram70 wrote:

I had initially omitted the suffix since we appear to do that for the only other case with the `.satfinite` modifier mandatorily required (the `f32` to `f8x2` conversions). But I agree that it would be better to have all the modifiers as a suffix in the intrinsic and builtin names since we do that for everything else. I have updated the names of those intrinsics and builtins now. Thanks!

https://github.com/llvm/llvm-project/pull/134345