|  | // Copyright 2020-2022 F4PGA Authors | 
|  | // | 
|  | // Licensed under the Apache License, Version 2.0 (the "License"); | 
|  | // you may not use this file except in compliance with the License. | 
|  | // You may obtain a copy of the License at | 
|  | // | 
|  | //     http://www.apache.org/licenses/LICENSE-2.0 | 
|  | // | 
|  | // Unless required by applicable law or agreed to in writing, software | 
|  | // distributed under the License is distributed on an "AS IS" BASIS, | 
|  | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | 
|  | // See the License for the specific language governing permissions and | 
|  | // limitations under the License. | 
|  | // | 
|  | // SPDX-License-Identifier: Apache-2.0 | 
|  |  | 
|  | module mac_unit ( | 
|  | a, | 
|  | b, | 
|  | out | 
|  | ); | 
|  | parameter DATA_WIDTH = 16; | 
|  | input [DATA_WIDTH - 1 : 0] a, b; | 
|  | output [2*DATA_WIDTH - 1 : 0] out; | 
|  |  | 
|  | assign out = a * b + out; | 
|  | endmodule | 
|  |  |