[Mlir-commits] [mlir] [mlir][arith][transforms] Adds Truncf f32 to f4e2m1 (PR #144157)

[Krzysztof Drewniak]

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@@ -322,6 +334,74 @@ struct BFloat16TruncFOpConverter : public OpRewritePattern<arith::TruncFOp> {
   }
 };
 
+struct F4E2M1ExtFOpConverter : public OpRewritePattern<arith::ExtFOp> {
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krzysz00 wrote:

Part of me wants to just materialize a constant memref of the 8 (or 16) possible outputs and just do a lookup into it.

Or a `<16 x f32>`, even

https://github.com/llvm/llvm-project/pull/144157