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ビジュアルプログラミングで高位合成 その10

Last updated at Posted at 2024-09-22

概要

ビジュアルプログラミングで組み合わせ回路を組み立てて、シュミレーションして、verilogを生成します。
高位合成です。
実は、今の実装では、全加算器が高位合成できません。
全加算器の高位合成を実装しました。検証します。
検証編

テストベンチを書く。


module x(input B, input A, input Cin, output Sum, output Cout);
	wire w0;
	wire w1;
	wire w2;
	wire w3;
	assign Sum = (Cin ^ w0);
	assign w0 = (A ^ B);
	assign w1 = (A ^ B);
	assign w2 = (A & B);
	assign Cout = (w3 | w2);
	assign w3 = (Cin & w1);
endmodule


module test;
	reg A;
	reg B;
	reg Cin;
	x u(.A(A), .B(B), .Cin(Cin), .Sum(Sum), .Cout(Cout));
	initial
	begin
		$display(" A   B   Cin Sum Cout");
		$monitor(" %b   %b   %b   %b   %b", A, B, Cin, Sum, Cout);
		A = 0;
		B = 0;
		Cin = 0;
	#10;
		A = 0;
		B = 1;
		Cin = 0;
	#10;
		A = 1;
		B = 0;
		Cin = 0;
	#10;
		A = 1;
		B = 1;
		Cin = 0;
	#10;
		A = 0;
		B = 0;
		Cin = 1;
	#10;
		A = 0;
		B = 1;
		Cin = 1;
	#10;
		A = 1;
		B = 0;
		Cin = 1;
	#10;
		A = 1;
		B = 1;
		Cin = 1;
	#10;
		$finish;
	end
endmodule





iverilogでシュミレーション実行

>iverilog fa1.v

>vvp a.out
 A   B   Cin Sum Cout
 0   0   0   0   0
 0   1   0   1   0
 1   0   0   1   0
 1   1   0   0   1
 0   0   1   1   0
 0   1   1   0   1
 1   0   1   0   1
 1   1   1   1   1
fa1.v:58: $finish called at 80 (1s)

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