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execute.v
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execute.v
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`timescale 1ns / 1ps
//////////////////////////////////////////////////////////////////////////////////
// Company:
// Engineer:
//
// Create Date: 20:19:13 05/15/2019
// Design Name:
// Module Name: EXE_STAGE
// Project Name:
// Target Devices:
// Tool versions:
// Description:
//
// Dependencies:
//
// Revision:
// Revision 0.01 - File Created
// Additional Comments:
//
//////////////////////////////////////////////////////////////////////////////////
module execute(exe_aluc,exe_aluimm,exe_a,exe_b,exe_imm,exe_shift,exe_alu,z,
mem_alu,wb_mo,exe_adepen, exe_bdepen,
exe_wz
);
input exe_wz;
input [1:0] exe_adepen, exe_bdepen;
input [31:0] wb_mo, mem_alu;
input [31:0] exe_a,exe_b,exe_imm; //ea-由寄存器读出的操作数a;eb-由寄存器读出的操作数a;eimm-经过扩展的立即数;
input [2:0] exe_aluc; //ALU控制码
input exe_aluimm,exe_shift; //ALU输入操作数的多路选择器
output [31:0] exe_alu; //alu操作输出
output z;
wire ze;
assign z = ze&exe_wz;
wire [31:0] alua,alub,sa;
assign sa={27'b0,exe_imm[9:5]};//移位位数的生成
mux32_4_1 alu_ina (exe_a,sa,mem_alu,wb_mo,exe_adepen,alua);//选择ALU a端的数据来源
mux32_4_1 alu_inb (exe_b,exe_imm,mem_alu,wb_mo,exe_bdepen,alub);//选择ALU b端的数据来源
alu al_unit (alua,alub,exe_aluc,exe_alu,ze);//ALU
endmodule