[Mlir-commits] [mlir] [MLIR][NVVM] Add support for f6x2 conversion (PR #136537)

[Durgadoss R]

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@@ -1066,6 +1066,56 @@ def NVVM_CvtFloatToTF32Op : NVVM_Op<"cvt.float.to.tf32"> {
   }];
 }
 
+def CVTFP6E2M3 : I32EnumAttrCase<"E2M3", 0, "e2m3">;
+def CVTFP6E3M2 : I32EnumAttrCase<"E3M2", 1, "e3m2">;
+
+def CVTFP6Type : I32EnumAttr<"CVTFP6Type", "NVVM CVTFP6Type kind",
+  [CVTFP6E2M3, CVTFP6E3M2]> {
+  let genSpecializedAttr = 0;
+  let cppNamespace = "::mlir::NVVM";
+}
+def CVTFP6TypeAttr : EnumAttr<NVVM_Dialect, CVTFP6Type, "cvt_fp6_type"> {
+  let assemblyFormat = "`<` $value `>`";
+}
+
+def NVVM_CvtToF6x2Op : NVVM_Op<"cvt.to.f6x2"> {
+  let summary = "Convert the given float input to f6x2";
+  let description = [{
+    This Op converts the given float input to f6x2.
+    The result `dst` is represented either as an i16 type or a vector
+    of two i8 types.
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durga4github wrote:

Please also include the details on the nature of the result.. (from spec)

```...the converted values are packed in the destination operand d such that the value converted from input a is stored in the upper 8 bits of d with 2 MSB bits padded with zeros and the value converted from input b is stored in the lower 8 bits of d with 2 MSB bits padded with zeros.```

https://github.com/llvm/llvm-project/pull/136537