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设计一个 32 位 ALU 支持加法、减法、与、或、异或、取非这六中运算

author : Mr.Maoe-mail : 2458682080@qq.commodule ALU_32(	input [31:0] data_a_in,	input [31:0] data_b_in,	input carry_in,	input [3:0] op_code,	output reg carry_out,	output reg [31:0] result_out);	localparam	ADD = 0, SUB = 1, AND = 2, OR = 3, XOR = 4, NONA = 5, NONB = 6;		always @ (op_code or data_a_in or data_b_in)		case(op_code)			ADD	:	{carry_out,result_out} <= data_a_in + data_b_in + carry_in;			SUB	:	{carry_out,result_out} <= {data_a_in[31],data_a_in} - {data_b_in[31],data_b_in} - carry_in;			AND	:	result_out <= data_a_in & data_b_in;			OR		:	result_out <= data_a_in | data_b_in;						XOR	:	result_out <= data_a_in ^ data_b_in;			NONA	:	result_out <= ~data_a_in;			NONB	:	result_out <= ~data_b_in;			default	:	result_out <= data_a_in;		endcaseendmodule

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