【FPGA】 MIPS 12条整数指令【2】

目录

仿真

代码

完整代码

---

实现slt

仿真

ori r1,r0,1100h     
ori r2,r0,0020h   
ori r3,r0,ff00h        
ori r4,r0,ffffh   

addi r5,r0,ffff
slt r6,r5,r4
slt r6,r4,r3

代码

EX

`Slt:regcData = ($signed(regaData)<$signed(regbData))?1'b1:1'b0;

ID

`Inst_slt:beginop = `Slt;regaRead = `Valid;regbRead = `Invalid;regcWrite = `Valid;regaAddr = inst[25:21];regbAddr = inst[20:16];regcAddr = inst[15:11];  imm = `Zero;end

完整代码

`include "define.v";
module  ID (input wire rst,    input wire [31:0] pc,   //Jinput wire [31:0] inst,input wire [31:0] regaData_i,input wire [31:0] regbData_i,output reg [5:0] op,    output reg [31:0] regaData,output reg [31:0] regbData,output reg regaRead,output reg regbRead,output reg regcWrite,output reg [4:0] regaAddr,output reg [4:0] regbAddr,    output reg [4:0] regcAddr,output reg [31:0] jAddr,   //Joutput reg jCe//J);wire [5:0] inst_op = inst[31:26];   reg [31:0] imm;//Rwire[5:0] func = inst[5:0]; //Jwire [31:0] npc = pc + 4;always@(*)if(rst == `RstEnable)beginop = `Nop;            regaRead = `Invalid;regbRead = `Invalid;regcWrite = `Invalid;regaAddr = `Zero;regbAddr = `Zero;regcAddr = `Zero;imm    = `Zero;jCe = `Invalid;//JjAddr = `Zero;//Jendelse beginjCe = `Invalid;//JjAddr = `Zero;//Jcase(inst_op)`Inst_ori:beginop = `Or;                    regaRead = `Valid;regbRead = `Invalid;regcWrite = `Valid;regaAddr = inst[25:21];regbAddr = `Zero;regcAddr = inst[20:16];imm = {16'h0, inst[15:0]};end`Inst_andi:beginop = `And;                    regaRead = `Valid;regbRead = `Invalid;regcWrite = `Valid;regaAddr = inst[25:21];regbAddr = `Zero;regcAddr = inst[20:16];imm = {16'h0, inst[15:0]};end`Inst_xori:beginop = `Xor;                    regaRead = `Valid;regbRead = `Invalid;regcWrite = `Valid;regaAddr = inst[25:21];regbAddr = `Zero;regcAddr = inst[20:16];imm = {16'h0, inst[15:0]};end`Inst_addi:beginop = `Add;                    regaRead = `Valid;regbRead = `Invalid;regcWrite = `Valid;regaAddr = inst[25:21];regbAddr = `Zero;regcAddr = inst[20:16];imm = {{16{inst[15]}}, inst[15:0]};end`Inst_subi:beginop = `Sub;                    regaRead = `Valid;regbRead = `Invalid;regcWrite = `Valid;regaAddr = inst[25:21];regbAddr = `Zero;regcAddr = inst[20:16];imm = {{16{inst[15]}}, inst[15:0]};end`Inst_lui:beginop = `Lui;                    regaRead = `Invalid;regbRead = `Invalid;regcWrite = `Valid;regaAddr = `Zero;regbAddr = `Zero;regcAddr = inst[20:16];imm = {inst[15:0],16'h0};end`Inst_r:case(func)`Inst_add:beginop = `Add;  regaRead = `Valid;regbRead = `Valid;regcWrite = `Valid;regaAddr = inst[25:21];regbAddr = inst[20:16];regcAddr = inst[15:11];imm = `Zero;end`Inst_or:beginop = `Or;regaRead = `Valid;regbRead = `Valid;regcWrite = `Valid;regaAddr = inst[25:21];regbAddr = inst[20:16];regcAddr = inst[15:11];imm = `Zero;end`Inst_sub:beginop = `Sub;regaRead = `Valid;regbRead = `Valid;regcWrite = `Valid;regaAddr = inst[25:21];regbAddr = inst[20:16];regcAddr = inst[15:11];imm = `Zero;end`Inst_and:beginop = `And;regaRead = `Valid;regbRead = `Valid;regcWrite = `Valid;regaAddr = inst[25:21];regbAddr = inst[20:16];regcAddr = inst[15:11];imm = `Zero;end`Inst_xor:beginop = `Xor;regaRead = `Valid;regbRead = `Valid;regcWrite = `Valid;regaAddr = inst[25:21];regbAddr = inst[20:16];regcAddr = inst[15:11];imm = `Zero;end`Inst_sll:beginop = `Sll;regaRead = `Invalid;regbRead = `Valid;regcWrite = `Valid;regaAddr = `Zero;regbAddr = inst[20:16];regcAddr = inst[15:11];imm = {27'b0,inst[10:6]};end`Inst_srl:beginop = `Srl;regaRead = `Invalid;regbRead = `Valid;regcWrite = `Valid;regaAddr = `Zero;regbAddr = inst[20:16];regcAddr = inst[15:11];imm = {27'b0,inst[10:6]};end`Inst_sra:beginop = `Sra;regaRead = `Invalid;regbRead = `Valid;regcWrite = `Valid;regaAddr = `Zero;regbAddr = inst[20:16];regcAddr = inst[15:11];imm = {27'b0,inst[10:6]};end`Inst_jr:beginop = `Jr;regaRead = `Valid;//rsregbRead = `Invalid;regcWrite = `Invalid;regaAddr = inst[25:21];regbAddr = `Zero;regcAddr = 5'b11111;jAddr = regaData;jCe = `Valid;imm = `Zero;end`Inst_jalr:beginop = `Jal;regaRead = `Valid;regbRead = `Invalid;regcWrite = `Valid;regaAddr = inst[25:21];regbAddr = `Zero;regcAddr = inst[15:11];  //jAddr = regaData;jCe = `Valid;imm = npc;end`Inst_slt:beginop = `Slt;regaRead = `Valid;regbRead = `Invalid;regcWrite = `Valid;regaAddr = inst[25:21];regbAddr = inst[20:16];regcAddr = inst[15:11];  imm = `Zero;enddefault:beginregaRead = `Invalid;regbRead = `Invalid;regcWrite = `Invalid;regaAddr = `Zero;regbAddr = `Zero;regcAddr = `Zero;imm = `Zero;endendcase//J`Inst_j:beginop = `J;regaRead = `Invalid;regbRead = `Invalid;regcWrite = `Invalid;regaAddr = `Zero;regbAddr = `Zero;regcAddr = `Zero;jAddr = {npc[31:28], inst[25:0], 2'b00};jCe = `Valid;imm = `Zero;end            `Inst_jal:beginop = `Jal;regaRead = `Invalid;regbRead = `Invalid;regcWrite = `Valid;regaAddr = `Zero;regbAddr = `Zero;regcAddr = 5'b11111;jAddr = {npc[31:28], inst[25:0], 2'b00};jCe = `Valid;imm = npc;end//J `Inst_beq:beginop = `Beq;regaRead = `Valid;regbRead = `Valid;regcWrite = `Invalid;regaAddr = inst[25:21];regbAddr = inst[20:16];regcAddr = `Zero;jAddr = npc+{{14{inst[15]}},inst[15:0],2'b00};jCe=(regaData==regbData)?`Valid:`Invalid; /* if(regaData==regbData)jCe = `Valid;elsejCe = `Invalid;*/imm = `Zero;end      `Inst_bne:beginop = `Bne;regaRead = `Valid;regbRead = `Valid;regcWrite = `Invalid;regaAddr = inst[25:21];regbAddr = inst[20:16];regcAddr = `Zero;jAddr = npc+{{14{inst[15]}},inst[15:0],2'b00};jCe=(regaData!=regbData)?`Valid:`Invalid;   /* if(regaData!=regbData)jCe = `Valid;elsejCe = `Invalid;*/imm = `Zero;end      `Inst_bgtz:beginop = `Bgtz;regaRead = `Valid;regbRead = `Valid;//regcWrite = `Invalid;regaAddr = inst[25:21];regbAddr = inst[20:16];regcAddr = `Zero;jAddr = npc+{{14{inst[15]}},inst[15:0],2'b00};jCe = (regaData[31]==0)?`Valid:`Invalid;imm = 32'b0;  //end`Inst_bltz:beginop = `Bgtz;regaRead = `Valid;regbRead = `Valid;//regcWrite = `Invalid;regaAddr = inst[25:21];regbAddr = inst[20:16];regcAddr = `Zero;jAddr = npc+{{14{inst[15]}},inst[15:0],2'b00};jCe = (regaData[31]==1)?`Valid:`Invalid;  //imm = 32'b0;  //end`Inst_lw:beginop = `Lw;regaRead = `Valid;regbRead = `Invalid;regcWrite = `Valid;regaAddr = inst[25:21];regbAddr = `Zero;regcAddr = inst[20:16];imm = {{16{inst[15]}},inst[15:0]};end`Inst_sw:beginop = `Sw;regaRead = `Valid;regbRead = `Valid;regcWrite = `Invalid;regaAddr = inst[25:21];regbAddr = inst[20:16];regcAddr = `Zero;imm = {{16{inst[15]}},inst[15:0]};end	default:beginop = `Nop;                    regaRead = `Invalid;regbRead = `Invalid;regcWrite = `Invalid;regaAddr = `Zero;regbAddr = `Zero;regcAddr = `Zero;imm = `Zero;endendcase end/*always@(*)if(rst == `RstEnable)regaData = `Zero;else if(regaRead == `Valid)regaData = regaData_i;else  regaData = imm;always@(*)if(rst == `RstEnable)regbData = `Zero;      else if(regbRead == `Valid)regbData = regbData_i;elseregbData = imm; */
always@(*)      if(rst == `RstEnable)          regaData = `Zero;      else if(op == `Lw || op == `Sw)               regaData = regaData_i + imm;      else if(regaRead == `Valid)          regaData = regaData_i;      else          regaData = imm;    always@(*)      if(rst == `RstEnable)          regbData = `Zero;      else if(regbRead == `Valid)          regbData = regbData_i;      else          regbData = imm;endmodule

`include "define.v";
module DataMem(input wire clk,input wire ce,input wire we,input wire [31:0] addr,input wire [31:0] wtData,output reg [31:0] rdData
);reg [31:0] datamem [1023 : 0];always@(*)      if(ce == `RamDisable)rdData = `Zero;elserdData = datamem[addr[11 : 2]]; always@(posedge clk)if(ce == `RamEnable && we == `RamWrite)datamem[addr[11 : 2]] = wtData;else ;endmodule

`define RstEnable       1'b1
`define RstDisable      1'b0
`define RomEnable       1'b1 
`define RomDisable      1'b0
`define Zero	        0
`define Valid	        1'b1
`define Invalid	        1'b0
//I
`define Inst_ori   	6'b001101
`define Inst_addi  	6'b001000
`define Inst_andi  	6'b001100
`define Inst_xori  	6'b001110
`define Inst_lui   	6'b001111
`define Inst_subi  	6'b001001//lw sw
`define Inst_lw 	6'b100011
`define Inst_sw 	6'b101011//beq bne
`define Inst_beq  	6'b000100
`define Inst_bne  	6'b000101//R
`define Inst_r    	6'b000000
`define Inst_add  	6'b100000
`define Inst_sub  	6'b100010
`define Inst_and	6'b100100
`define Inst_or    	6'b100101
`define Inst_xor   	6'b100110
`define Inst_sll   	6'b000000
`define Inst_srl   	6'b000010
`define Inst_sra   	6'b000011`define Inst_jr    	6'b001000
//J
`define Inst_j   	6'b000010
`define Inst_jal 	6'b000011//12
`define Inst_slt	6'b101010
`define Inst_bgtz	6'b000111
`define Inst_bltz	6'b000001
`define Inst_jalr	6'b001001
`define Inst_mult	6'b011000
`define Inst_multu	6'b011001
`define Inst_div	6'b011010
`define Inst_divu	6'b011011
`define Inst_mfhi	6'b010000
`define Inst_mflo	6'b010010
`define Inst_mthi	6'b010001
`define Inst_mtlo	6'b010011//
`define Inst_ll		6'b110000
`define Inst_sc		6'b111000
`define Inst_mfc0	6'b000000
`define Inst_mtc0	6'b000000
`define Inst_eret	6'b011000
`define syscall		6'b001100`define Nop     	6'b000000
`define Or      	6'b000001
`define Add		6'b000010
`define And		6'b000011
`define Xor		6'b000100
`define Lui		6'b000101
`define Sub     	6'b000110
`define Sll     	6'b000111
`define Srl     	6'b001000
`define Sra		6'b001001
`define J		6'b001010
`define Jal		6'b001011
`define Beq		6'b001100
`define Bne		6'b001101
`define Jr		6'b001110
`define Lw  		6'b010000
`define Sw  		6'b010001
`define Bgtz		6'b010010
`define Bltz		6'b010011
`define Slt		6'b010100//MEM
`define RamWrite 	1'b1
`define RamUnWrite 	1'b0
`define RamEnable 	1'b1
`define RamDisable 	1'b0

`include "define.v"
module EX(input wire rst,//input wire [5:0] op,input wire [5:0] op_i,     input wire [31:0] regaData,input wire [31:0] regbData,input wire regcWrite_i,input wire [4:0]regcAddr_i,output reg [31:0] regcData,output wire regcWrite,output wire [4:0] regcAddr,output wire [5:0] op,output wire [31:0] memAddr,output wire [31:0] memData
);    assign op = op_i;assign memAddr = regaData;assign memData = regbData;always@(*)if(rst == `RstEnable)regcData = `Zero;elsebegin//case(op)case(op_i)`Or:regcData = regaData | regbData;`Add:regcData = regaData + regbData;`And:regcData = regaData & regbData;`Xor:regcData = regaData ^ regbData;`Lui:regcData = regaData;/*`Lui:regcData = regaData | regbData;*/`Sub:regcData = regaData - regbData;`Sll:regcData = regbData << regaData;`Srl:regcData = regbData >> regaData;`Sra:regcData = ($signed(regbData)) >>> regaData;`J:regcData = `Zero;`Jr:regcData = `Zero;`Jal:regcData = regbData;`Beq:regcData = `Zero;`Bne:regcData = `Zero;`Bltz:regcData = `Zero;`Bgtz:regcData = `Zero;`Slt:regcData = ($signed(regaData)<$signed(regbData))?1'b1:1'b0;default:regcData = `Zero;endcaseendassign regcWrite = regcWrite_i;assign regcAddr = regcAddr_i;
endmodule

`include "define.v"
module IF(input wire clk,input wire rst,input wire [31:0] jAddr,//Jinput wire jCe,//Joutput reg ce, 
output reg [31:0] pc
);always@(*)if(rst == `RstEnable)ce = `RomDisable;elsece = `RomEnable;
/*    always@(posedge clk)if(ce == `RomDisable)pc = `Zero;elsepc = pc + 4;
*/always@(posedge clk)if(ce == `RomDisable)pc = `Zero;else if(jCe == `Valid)//Jpc = jAddr;elsepc = pc + 4;
endmodule

`include "define.v"
module InstMem(input wire ce,input wire [31:0] addr,output reg [31:0] data
);reg [31:0] instmem [1023 : 0];    always@(*)      if(ce == `RomDisable)data = `Zero;elsedata = instmem[addr[11 : 2]];   initialbegininstmem [0] = 32'h34011100;   //ori r1,r0,1100h         r1--32'h0000 1100instmem [1] = 32'h34020020;   //ori r2,r0,0020h		r2--32'h0000 0020instmem [2] = 32'h3403ff00;   //ori r3,r0,ff00h		r3--32'h0000 ff00instmem [3] = 32'h3404ffff;   //ori r4,r0,ffffh		r4--32'h0000 ffffinstmem [4] = 32'h2005ffff;	//addi r5,r0,ffff	r5--32'hffff ffffinstmem [5] =32'b000000_00101_00100_00110_00000_101010;	  //slt r6,r5,r4instmem [6] =32'b000000_00100_00011_00110_00000_101010;	  //slt r6,r4,r3end
endmodule

`include "define.v";
module MEM(input wire rst,		input wire [5:0] op,input wire [31:0] regcData,input wire [4:0] regcAddr,input wire regcWr,input wire [31:0] memAddr_i,input wire [31:0] memData,	input  wire [31:0] rdData,output wire [4:0]  regAddr,output wire regWr,output wire [31:0] regData,	output wire [31:0] memAddr,output reg [31:0] wtData,output reg memWr,	output reg memCe
);assign regAddr = regcAddr;    assign regWr = regcWr;    assign regData = (op == `Lw) ? rdData : regcData;    assign memAddr = memAddr_i;always @(*)        if(rst == `RstEnable)          begin            wtData = `Zero;            memWr = `RamUnWrite;            memCe = `RamDisable;          end        elsecase(op)                `Lw:                  begin                    wtData = `Zero;                        memWr = `RamUnWrite;                     memCe = `RamEnable;                    end                `Sw:                  begin                    wtData = memData;                    memWr = `RamWrite;                      memCe = `RamEnable;                   enddefault:                  begin                    wtData = `Zero;                    memWr = `RamUnWrite;                    memCe = `RamDisable;                  end            endcase
endmodule

`include "define.v";
module MIPS(input wire clk,input wire rst,input wire [31:0] instruction,input wire [31:0] rdData,//lsoutput wire romCe,output wire [31:0] instAddr,output wire [31:0] wtData,//lsoutput wire [31:0] memAddr,//lsoutput wire memCe,//lsoutput wire memWr//ls
);wire [31:0] regaData_regFile, regbData_regFile;wire [31:0] regaData_id, regbData_id; wire [31:0] regcData_ex;//wire [5:0] op; wire [5:0] op_id; //ls  wire regaRead, regbRead;wire [4:0] regaAddr, regbAddr;wire regcWrite_id, regcWrite_ex;wire [4:0] regcAddr_id, regcAddr_ex;//Jwire [31:0] jAddr;wire jCe;//lswire [5:0] op_ex;wire[31:0] memAddr_ex,memData_ex;wire [5:0] regAddr_mem;wire [31:0] regData_mem;wire regWr_mem;IF if0(.clk(clk),.rst(rst),.jAddr(jAddr),//J.jCe(jCe),//J.ce(romCe), .pc(instAddr));ID id0(.rst(rst), .pc(instAddr),//J.inst(instruction),.regaData_i(regaData_regFile),.regbData_i(regbData_regFile),//.op(op),.op(op_id),//ls.regaData(regaData_id),.regbData(regbData_id),.regaRead(regaRead),.regbRead(regbRead),.regaAddr(regaAddr),.regbAddr(regbAddr),.regcWrite(regcWrite_id),.regcAddr(regcAddr_id),.jAddr(jAddr),//J.jCe(jCe)//J);EX ex0(.rst(rst),//.op(op),    .op_i(op_id),    .regaData(regaData_id),.regbData(regbData_id),.regcWrite_i(regcWrite_id),.regcAddr_i(regcAddr_id),.regcData(regcData_ex),.regcWrite(regcWrite_ex),.regcAddr(regcAddr_ex),.op(op_ex),//ls.memAddr(memAddr_ex),//ls.memData(memData_ex)//ls);    MEM mem0(.rst(rst),		.op(op_ex),.regcData(regcData_ex),.regcAddr(regcAddr_ex),.regcWr(regcWrite_ex),.memAddr_i(memAddr_ex),.memData(memData_ex),	.rdData(rdData),.regAddr(regAddr_mem),.regWr(regWr_mem),.regData(regData_mem),	.memAddr(memAddr),.wtData(wtData),.memWr(memWr),	.memCe(memCe));RegFile regfile0(.clk(clk),.rst(rst),//.we(regcWrite_ex),.we(regWr_mem),//.waddr(regcAddr_ex),.waddr(regAddr_mem),//.wdata(regcData_ex),.wdata(regData_mem),.regaRead(regaRead),.regbRead(regbRead),.regaAddr(regaAddr),.regbAddr(regbAddr),.regaData(regaData_regFile),.regbData(regbData_regFile));endmodule

`include "define.v"
module RegFile(input wire clk,input wire rst,input wire we,input wire [4:0] waddr,input wire [31:0] wdata,input wire regaRead,input wire regbRead,input wire [4:0] regaAddr,input wire [4:0] regbAddr,output reg [31:0] regaData,output reg [31:0] regbData
);reg [31:0] reg32 [31 : 0];    always@(*)if(rst == `RstEnable)regaData = `Zero;else if(regaAddr == `Zero)regaData = `Zero;elseregaData = reg32[regaAddr];always@(*)if(rst == `RstEnable)          regbData = `Zero;else if(regbAddr == `Zero)regbData = `Zero;elseregbData = reg32[regbAddr];always@(posedge clk)if(rst != `RstEnable)if((we == `Valid) && (waddr != `Zero))reg32[waddr] = wdata;else ;          
endmodule

module SoC(input wire clk,input wire rst
);wire [31:0] instAddr;wire [31:0] instruction;wire romCe;//lswire memCe, memWr;    wire [31:0] memAddr;wire [31:0] rdData;wire [31:0] wtData;MIPS mips0(.clk(clk),.rst(rst),.instruction(instruction),.instAddr(instAddr),.romCe(romCe),.rdData(rdData),        .wtData(wtData),        .memAddr(memAddr),        .memCe(memCe),        .memWr(memWr) );	InstMem instrom0(.ce(romCe),.addr(instAddr),.data(instruction));//DataMemDataMem datamem0(       .ce(memCe),        .clk(clk),        .we(memWr),        .addr(memAddr),        .wtData(wtData),        .rdData(rdData)  );
endmodule

`include "define.v"
module soc_tb;reg clk;reg rst;initialbeginclk = 0;rst = `RstEnable;#100rst = `RstDisable;#10000 $stop;        endalways #10 clk = ~ clk;SoC soc0(.clk(clk), .rst(rst));
endmodule