[Mlir-commits] [mlir] [MLIR][Arith] Add rounding mode attribute to `truncf` (PR #86152)

[Jakub Kuderski]

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@@ -156,4 +156,29 @@ def Arith_IntegerOverflowAttr :
   let assemblyFormat = "`<` $value `>`";
 }
 
+//===----------------------------------------------------------------------===//
+// Arith_RoundingMode
+//===----------------------------------------------------------------------===//
+
+// These correspond to LLVM's values defined in:
+// llvm/include/llvm/ADT/FloatingPointMode.h
+
+def Arith_RToNearestTiesToEven       // Round to nearest, ties to even
+    : I32EnumAttrCase<"tonearesteven", 0>;
+def Arith_RDownward                  // Round toward -inf
+    : I32EnumAttrCase<"downward", 1>;
+def Arith_RUpward                    // Round toward +inf
+    : I32EnumAttrCase<"upward", 2>;
+def Arith_RTowardZero                // Round toward 0
+    : I32EnumAttrCase<"towardzero", 3>;
+def Arith_RToNearestTiesAwayFromZero // Round to nearest, ties away from zero
+    : I32EnumAttrCase<"tonearestaway", 4>;
----------------
kuhar wrote:

If I can have one request, could you add some snake case to make this more readable? I'd strongly prefer `to_nearest_away` over `tonearestaway`

https://github.com/llvm/llvm-project/pull/86152