diff --git a/mlir/include/mlir-c/BuiltinTypes.h b/mlir/include/mlir-c/BuiltinTypes.h
--- a/mlir/include/mlir-c/BuiltinTypes.h
+++ b/mlir/include/mlir-c/BuiltinTypes.h
@@ -173,6 +173,17 @@
 /// context.
 MLIR_CAPI_EXPORTED MlirType mlirTF32TypeGet(MlirContext ctx);
 
+/// Returns the typeID of a TF128 type.
+MLIR_CAPI_EXPORTED MlirTypeID mlirFloat128TypeGetTypeID(void);
+
+/// Checks whether the given type is an TF128 type.
+MLIR_CAPI_EXPORTED bool mlirTypeIsATF128(MlirType type);
+
+/// Creates a TF128 type in the given context. The type is owned by the
+/// context.
+MLIR_CAPI_EXPORTED MlirType mlirF128TypeGet(MlirContext ctx);
+
+
 //===----------------------------------------------------------------------===//
 // None type.
 //===----------------------------------------------------------------------===//
diff --git a/mlir/lib/CAPI/IR/BuiltinTypes.cpp b/mlir/lib/CAPI/IR/BuiltinTypes.cpp
--- a/mlir/lib/CAPI/IR/BuiltinTypes.cpp
+++ b/mlir/lib/CAPI/IR/BuiltinTypes.cpp
@@ -178,6 +178,15 @@
   return wrap(FloatType::getF64(unwrap(ctx)));
 }
 
+MlirTypeID mlirFloat128TypeGetTypeID() { return wrap(Float128Type::getTypeID()); }
+
+bool mlirTypeIsAF128(MlirType type) { return unwrap(type).isF128(); }
+
+MlirType mlirF128TypeGet(MlirContext ctx) {
+  return wrap(FloatType::getF128(unwrap(ctx)));
+}
+
+
 //===----------------------------------------------------------------------===//
 // None type.
 //===----------------------------------------------------------------------===//