[llvm] [mlir] [MLIR] Add f6E3M2FN type (PR #105573)

[Diego Caballero via llvm-commits]

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@@ -91,6 +91,8 @@ IntegerType IntegerType::scaleElementBitwidth(unsigned scale) {
 //===----------------------------------------------------------------------===//
 
 unsigned FloatType::getWidth() {
+  if (llvm::isa<Float6E3M2FNType>(*this))
+    return 6;
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dcaballe wrote:

Why don't we use APFloat here?

https://github.com/llvm/llvm-project/pull/105573