diff --git a/openfpga_flow/benchmarks/micro_benchmark/mac_8/mac_8.v b/openfpga_flow/benchmarks/micro_benchmark/mac_8/mac_8.v
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+//-------------------------------------------------------
+//  Functionality: A 8-bit multiply-acculumate circuit
+//  Author:        Xifan Tang
+//-------------------------------------------------------
+
+module mac_8(a, b, c, out);
+parameter DATA_WIDTH = 8;  /* declare a parameter. default required */
+input [DATA_WIDTH - 1 : 0] a, b, c;
+output [DATA_WIDTH - 1 : 0] out;
+
+assign out = a * b + c;
+
+endmodule
+
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