[Mlir-commits] [mlir] [mlir][spirv] Add 8-bit float type emulation (PR #148811)

[Jakub Kuderski]

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@@ -318,6 +328,44 @@ static Type convertSubByteIntegerType(const SPIRVConversionOptions &options,
                           type.getSignedness());
 }
 
+/// Converts 8-bit float types to integer types with the same bit width.
+/// Returns a nullptr for unsupported 8-bit float types.
+static Type convert8BitFloatType(const SPIRVConversionOptions &options,
+                                 FloatType type) {
+  if (!options.emulateUnsupportedFloatTypes)
+    return nullptr;
+  // F8 types are converted to integer types with the same bit width.
+  if (isa<Float8E5M2Type, Float8E4M3Type, Float8E4M3FNType, Float8E5M2FNUZType,
+          Float8E4M3FNUZType, Float8E4M3B11FNUZType, Float8E3M4Type,
+          Float8E8M0FNUType>(type))
+    return IntegerType::get(type.getContext(), type.getWidth());
+  LLVM_DEBUG(llvm::dbgs() << "unsupported 8-bit float type\n");
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kuhar wrote:

Print the unsupported type?

https://github.com/llvm/llvm-project/pull/148811