[llvm] [APFloat] Add APFloat support for E8M0 type (PR #107127)

[Matt Arsenault via llvm-commits]

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@@ -1007,6 +1023,10 @@ IEEEFloat &IEEEFloat::operator=(IEEEFloat &&rhs) {
 }
 
 bool IEEEFloat::isDenormal() const {
+  // The E8M0 format does not support denormals.
+  if (semantics == &semFloat8E8M0FN)
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arsenm wrote:

Also would expect this to just work out 

https://github.com/llvm/llvm-project/pull/107127