使用verilog语言实现含有ADD、SUB、AND、NOR、SRL、SLL、JR指令的多周期CPU测试程序将A这些指令执行结果输出
以下是使用Verilog语言实现含有ADD、SUB、AND、NOR、SRL、SLL、JR指令的多周期CPU的测试程序，并输出指令执行结果的示例代码：
module MultiCycleCPU_Test;
// 定义寄存器文件的模块
module RegisterFile (
input [4:0] rs1, rs2, rd,
input [31:0] write_data,
input write_enable,
output reg [31:0] read_data1, read_data2
);
// 定义寄存器数组
reg [31:0] registers [0:31];
// 读取寄存器数据
always @*
begin
read_data1 = registers[rs1];
read_data2 = registers[rs2];
end
// 写入寄存器数据
always @(posedge clk)
begin
if (write_enable)
registers[rd] <= write_data;
end
endmodule
// 定义控制单元的模块
module ControlUnit (
input [5:0] opcode,
output reg RegDst, ALUSrc, MemtoReg, RegWrite, MemRead, MemWrite, Branch, Jump,
output [1:0] ALUOp
);
// 控制信号的赋值
always @*
begin
case (opcode)
// R-type指令
6'b000000: begin
RegDst = 1'b1;
ALUSrc = 1'b0;
MemtoReg = 1'b0;
RegWrite = 1'b1;
MemRead = 1'b0;
MemWrite = 1'b0;
Branch = 1'b0;
Jump = 1'b0;
ALUOp = 2'b10;
end
// LW指令
6'b100011: begin
RegDst = 1'b0;
ALUSrc = 1'b1;
MemtoReg = 1'b1;
RegWrite = 1'b1;
MemRead = 1'b1;
MemWrite = 1'b0;
Branch = 1'b0;
Jump = 1'b0;
ALUOp = 2'b00;
end
// SW指令
6'b101011: begin
RegDst = 1'b0;
ALUSrc = 1'b1;
MemtoReg = 1'b0;
RegWrite = 1'b0;
MemRead = 1'b0;
MemWrite = 1'b1;
Branch = 1'b0;
Jump = 1'b0;
ALUOp = 2'b00;
end
// BEQ指令
6'b000100: begin
RegDst = 1'b0;
ALUSrc = 1'b0;
MemtoReg = 1'b0;
RegWrite = 1'b0;
MemRead = 1'b0;
MemWrite = 1'b0;
Branch = 1'b1;
Jump = 1'b0;
ALUOp = 2'b01;
end
// J指令
6'b000010: begin
RegDst = 1'b0;
ALUSrc = 1'b0;
MemtoReg = 1'b0;
RegWrite = 1'b0;
MemRead = 1'b0;
MemWrite = 1'b0;
Branch = 1'b0;
Jump = 1'b1;
ALUOp = 2'b00;
end
// 其他指令
default: begin
RegDst = 1'b0;
ALUSrc = 1'b0;
MemtoReg = 1'b0;
RegWrite = 1'b0;
MemRead = 1'b0;
MemWrite = 1'b0;
Branch = 1'b0;
Jump = 1'b0;
ALUOp = 2'b00;
end
endcase
end
endmodule
// 定义ALU控制单元的模块
module ALUControlUnit (
input [1:0] ALUOp,
input [5:0] funct,
output reg [3:0] ALUControl
);
// ALU控制信号的赋值
always @*
begin
case (ALUOp)
// ADD, SUB
2'b10: if (funct == 6'b100000) // ADD
ALUControl = 4'b0010;
else if (funct == 6'b100010) // SUB
ALUControl = 4'b0110;
else
ALUControl = 4'b0000;
// AND
2'b00: ALUControl = 4'b0010;
// NOR
2'b01: ALUControl = 4'b1100;
endcase
end
endmodule
// 定义多周期CPU的模块
module MultiCycleCPU (
input clk,
input reset,
input [31:0] instruction,
output reg [31:0] result
);
// 定义寄存器文件和控制单元的实例
RegisterFile rf (
.rs1(instruction[25:21]),
.rs2(instruction[20:16]),
.rd(instruction[15:11]),
.write_data(result),
.write_enable(1'b1),
.read_data1(),
.read_data2()
);
ControlUnit cu (
.opcode(instruction[31:26]),
.RegDst(),
.ALUSrc(),
.MemtoReg(),
.RegWrite(),
.MemRead(),
.MemWrite(),
.Branch(),
.Jump(),
.ALUOp()
);
// 定义ALU控制单元的实例
ALUControlUnit alu_cu (
.ALUOp(cu.ALUOp),
.funct(instruction[5:0]),
.ALUControl()
);
// 定义ALU的模块
module ALU (
input [31:0] operand1, operand2,
input [3:0] ALUControl,
output reg [31:0] result,
output reg zero
);
// 定义ALU的运算
always @*
begin
case (ALUControl)
// ADD
4'b0010: result = operand1 + operand2;
// SUB
4'b0110: result = operand1 - operand2;
// AND
4'b0010: result = operand1 & operand2;
// NOR
4'b1100: result = ~(operand1 | operand2);
endcase
// 判断运算结果是否为0
if (result == 32'b0)
zero = 1'b1;
else
zero = 1'b0;
end
endmodule
// 定义数据存储器的模块
module DataMemory (
input [31:0] address, write_data,
input MemRead, MemWrite,
output reg [31:0] read_data
);
// 定义存储器数组
reg [31:0] memory [0:1023];
// 读取数据
always @*
begin
if (MemRead)
read_data = memory[address[9:2]];
else
read_data = 32'b0;
end
// 写入数据
always @(posedge clk)
begin
if (MemWrite)
memory[address[9:2]] <= write_data;
end
endmodule
// 定义程序计数器的模块
module ProgramCounter (
input clk, reset,
input [31:0] jump_address,
output reg [31:0] PC
);
// 计数器的操作
always @(posedge clk)
begin
if (reset)
PC <= 32'h0;
else if (jump_address != 32'h0)
PC <= jump_address;
else
PC <= PC + 4;
end
endmodule
// 定义指令存储器的模块
module InstructionMemory (
input [31:0] address,
output reg [31:0] instruction
);
// 定义指令存储器数组
reg [31:0] memory [0:1023];
// 读取指令
always @*
begin
instruction = memory[address[9:2]];
end
// 写入指令
initial
begin
// ADD指令
memory[0] = 32'b000000_00001_00010_00011_00000_100000;
// SUB指令
memory[1] = 32'b000000_00001_00010_00011_00000_100010;
// AND指令
memory[2] = 32'b000000_00001_00010_00011_00000_100100;
// NOR指令
memory[3] = 32'b000000_00001_00010_00011_00000_100111;
// SRL指令
memory[4] = 32'b000000_00000_00010_00001_00010_000010;
// SLL指令
memory[5] = 32'b000000_00000_00010_00001_00010_000000;
// JR指令
memory[6] = 32'b000000_00010_00000_00000_00000_001000;
// 将其他地址的指令置为NOP
for (int i = 7; i <= 1023; i = i + 1)
memory[i] = 32'b000000_00000_00000_00000_00000_000000;
end
endmodule
// 定义顶层实例
RegisterFile rf (
.rs1(instruction[25:21]),
.rs2(instruction[20:16]),
.rd(instruction[15:11]),
.write_data(result),
.write_enable(1'b1),
.read_data1(),
.read_data2()
);
ControlUnit cu (
.opcode(instruction[31:26]),
.RegDst(),
.ALUSrc(),
.MemtoReg(),
.RegWrite(),
.MemRead(),
.MemWrite(),
.Branch(),
.Jump(),
.ALUOp()
);
ALUControlUnit alu_cu (
.ALUOp(cu.ALUOp),
.funct(instruction[5:0]),
.ALUControl()
);
ALU alu (
.operand1(rf.read_data1),
.operand2(rf.read_data2),
.ALUControl(alu_cu.ALUControl),
.result(result),
.zero()
);
DataMemory dm (
.address(result),
.write_data(rf.read_data2),
.MemRead(cu.MemRead),
.MemWrite(cu.MemWrite),
.read_data()
);
ProgramCounter pc (
.clk(clk),
.reset(reset),
.jump_address(result),
.PC()
);
InstructionMemory im (
.address(pc.PC[9:2]),
.instruction(instruction)
);
endmodule
// 定义顶层模块
module TopModule;
// 定义时钟和复位信号
reg clk, reset;
// 定义指令和结果信号
reg [31:0] instruction;
wire [31:0] result;
// 实例化多周期CPU模块
MultiCycleCPU cpu (
.clk(clk),
.reset(reset),
.instruction(instruction),
.result(result)
);
// 时钟信号的赋值
always
begin
#5 clk = ~clk; // 以5个时间单位为周期进行时钟翻转
end
// 初始化信号值
initial
begin
clk = 1'b0;
reset = 1'b1;
// 等待时钟稳定
#10 reset = 1'b0;
// 执行ADD指令
instruction = 32'b000000_00001_00010_00011_00000_100000;
#50 $display("ADD Result: %d", result);
// 执行SUB指令
instruction = 32'b000000_00001_00010_00011_00000_100010;
#50 $display("SUB Result: %d", result);
// 执行AND指令
instruction = 32'b000000_00001_00010_00011_00000_100100;
#50 $display("AND Result: %d", result);
// 执行NOR指令
instruction = 32'b000000_00001_00010_00011_00000_100111;
#50 $display("NOR Result: %d", result);
// 执行SRL指令
instruction = 32'b000000_00000_00010_00001_00010_000010;
#50 $display("SRL Result: %d", result);
// 执行SLL指令
instruction = 32'b000000_00000_00010_00001_00010_000000;
#50 $display("SLL Result: %d", result);
// 执行JR指令
instruction = 32'b000000_00010_00000_00000_00000_001000;
#50 $display("JR Result: %d", result);
// 结束仿真
$finish;
end
endmodule
在上述代码中，我们定义了一个多周期CPU的模块MultiCycleCPU，其中包含了寄存器文件RegisterFile、控制单元ControlUnit、ALU控制单元ALUControlUnit、ALU模块ALU、数据存储器DataMemory、程序计数器ProgramCounter和指令存储器InstructionMemory。在顶层模块TopModule中，我们实例化了多周期CPU模块，并通过改变instruction信号的值来执行不同的指令，并将执行结果通过result信号输出。
在初始化部分，我们先将时钟信号clk和复位信号reset初始化为低电平，然后经过一段时间后将复位信号reset置为高电平，以使CPU开始工作。之后，我们分别执行了ADD、SUB、AND、NOR、SRL、SLL和JR指令，并通过$display函数将执行结果输出。最后，通过$finish函数结束仿真。
请注意，上述代码仅为示例，具体的CPU实现和指令集可能会有所不同。您可以根据自己的需求进行相应的修改和扩展
原文地址: https://www.cveoy.top/t/topic/hTln 著作权归作者所有。请勿转载和采集!