[flang-commits] [flang] [flang] Unsupported rounding modes (PR #128240)

[via flang-commits]

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@@ -5450,13 +5450,33 @@ void IntrinsicLibrary::genIeeeSetRoundingMode(
     llvm::ArrayRef<fir::ExtendedValue> args) {
   // Set the current floating point rounding mode to the value of arg
   // ROUNDING_VALUE. Values are llvm.get.rounding encoding values.
-  // Generate an error if the value of optional arg RADIX is not 2.
+  // Modes ieee_to_zero, ieee_nearest, ieee_up, and ieee_down are supported.
+  // Modes ieee_away and ieee_other are not supported, and are treated as
+  // ieee_nearest. Generate an error if the optional RADIX arg is not 2.
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jeanPerier wrote:

Can you document this for the user in Extension.md or Intrinsics.md? (not sure which document makes the most sense).

https://github.com/llvm/llvm-project/pull/128240