[mlir][tosa] Add missing ext-mxfp description

[lhutton1]

Add a missing description.

[llvmbot]

@llvm/pr-subscribers-mlir-tosa

@llvm/pr-subscribers-mlir

Author: Luke Hutton (lhutton1)

Changes

Add a missing description.

---

Full diff: https://github.com/llvm/llvm-project/pull/167665.diff

1 Files Affected:

• (modified) mlir/include/mlir/Dialect/Tosa/IR/TosaOpBase.td (+1)

diff --git a/mlir/include/mlir/Dialect/Tosa/IR/TosaOpBase.td b/mlir/include/mlir/Dialect/Tosa/IR/TosaOpBase.td
index 5b595dd8eb32a..cc23955f31f23 100644
--- a/mlir/include/mlir/Dialect/Tosa/IR/TosaOpBase.td
+++ b/mlir/include/mlir/Dialect/Tosa/IR/TosaOpBase.td
@@ -240,6 +240,7 @@ class Tosa_I32EnumAttr<string name, string description, string mnemonic,
 // DOUBLEROUND  : Adds double rounding support to the RESCALE operator.
 // INEXACTROUND : Adds inexact rounding support to the RESCALE operator.
 // DYNAMIC      : Removes all Compile Time Constant state for CTC inputs.
+// MXFP         : Microscaling formats.
 //===----------------------------------------------------------------------===//
 
 def Tosa_NONE : I32EnumAttrCase<"none", 0>;