shifter32_var.v

是verilog做的简化mips32指令系统。 有些小问题

`timescale 100ns/1ns
module shifter32_var(inputa,shamt,shclk,ctrlsig,outreg);
	input [31:0] inputa;
	input [4:0] shamt;
	input shclk;
	input ctrlsig;
	
	output [31:0] outreg;
	reg [31:0] outreg;
	
	always @ (posedge shclk)
	if(ctrlsig)
	begin
		outreg[ 0]<= (~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[0]);
		
		outreg[ 1]<= (~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[1])
					|(~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[0]);
				
		outreg[ 2]<= (~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[2])
					|(~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[1])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[0]);
				
		outreg[ 3]<= (~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[3])
					|(~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[2])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[1])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]& shamt[0]&inputa[0]);
				
		outreg[ 4]<= (~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[4])
					|(~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[3])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[2])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]& shamt[0]&inputa[1])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]&~shamt[0]&inputa[0]);
					
		outreg[ 5]<= (~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[5])
					|(~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[4])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[3])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]& shamt[0]&inputa[2])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]&~shamt[0]&inputa[1])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]& shamt[0]&inputa[0]);
					
		outreg[ 6]<= (~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[6])
					|(~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[5])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[4])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]& shamt[0]&inputa[3])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]&~shamt[0]&inputa[2])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]& shamt[0]&inputa[1])
					|(~shamt[4]&~shamt[3]& shamt[2]& shamt[1]&~shamt[0]&inputa[0]);
					
		outreg[ 7]<= (~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[7])
					|(~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[6])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[5])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]& shamt[0]&inputa[4])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]&~shamt[0]&inputa[3])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]& shamt[0]&inputa[2])
					|(~shamt[4]&~shamt[3]& shamt[2]& shamt[1]&~shamt[0]&inputa[1])
					|(~shamt[4]&~shamt[3]& shamt[2]& shamt[1]& shamt[0]&inputa[0]);
					
		outreg[ 8]<= (~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[8])
					|(~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[7])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[6])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]& shamt[0]&inputa[5])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]&~shamt[0]&inputa[4])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]& shamt[0]&inputa[3])
					|(~shamt[4]&~shamt[3]& shamt[2]& shamt[1]&~shamt[0]&inputa[2])
					|(~shamt[4]&~shamt[3]& shamt[2]& shamt[1]& shamt[0]&inputa[1])
					|(~shamt[4]& shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[0]);
					
		outreg[ 9]<= (~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[9])
					|(~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[8])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[7])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]& shamt[0]&inputa[6])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]&~shamt[0]&inputa[5])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]& shamt[0]&inputa[4])
					|(~shamt[4]&~shamt[3]& shamt[2]& shamt[1]&~shamt[0]&inputa[3])
					|(~shamt[4]&~shamt[3]& shamt[2]& shamt[1]& shamt[0]&inputa[2])
					|(~shamt[4]& shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[1])
					|(~shamt[4]& shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[0]);
					
		outreg[10]<= (~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[10])
					|(~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[9])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[8])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]& shamt[0]&inputa[7])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]&~shamt[0]&inputa[6])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]& shamt[0]&inputa[5])
					|(~shamt[4]&~shamt[3]& shamt[2]& shamt[1]&~shamt[0]&inputa[4])
					|(~shamt[4]&~shamt[3]& shamt[2]& shamt[1]& shamt[0]&inputa[3])
					|(~shamt[4]& shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[2])
					|(~shamt[4]& shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[1])
					|(~shamt[4]& shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[0]);
					
		outreg[11]<= (~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[11])
					|(~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[10])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[9])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]& shamt[0]&inputa[8])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]&~shamt[0]&inputa[7])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]& shamt[0]&inputa[6])
					|(~shamt[4]&~shamt[3]& shamt[2]& shamt[1]&~shamt[0]&inputa[5])
					|(~shamt[4]&~shamt[3]& shamt[2]& shamt[1]& shamt[0]&inputa[4])
					|(~shamt[4]& shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[3])
					|(~shamt[4]& shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[2])
					|(~shamt[4]& shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[1])
					|(~shamt[4]& shamt[3]&~shamt[2]& shamt[1]& shamt[0]&inputa[0]);
					
		outreg[12]<= (~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[12])
					|(~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[11])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[10])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]& shamt[0]&inputa[9])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]&~shamt[0]&inputa[8])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]& shamt[0]&inputa[7])
					|(~shamt[4]&~shamt[3]& shamt[2]& shamt[1]&~shamt[0]&inputa[6])
					|(~shamt[4]&~shamt[3]& shamt[2]& shamt[1]& shamt[0]&inputa[5])
					|(~shamt[4]& shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[4])
					|(~shamt[4]& shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[3])
					|(~shamt[4]& shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[2])
					|(~shamt[4]& shamt[3]&~shamt[2]& shamt[1]& shamt[0]&inputa[1])
					|(~shamt[4]& shamt[3]& shamt[2]&~shamt[1]&~shamt[0]&inputa[0]);
					
		outreg[13]<= (~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[13])
					|(~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[12])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[11])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]& shamt[0]&inputa[10])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]&~shamt[0]&inputa[9])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]& shamt[0]&inputa[8])
					|(~shamt[4]&~shamt[3]& shamt[2]& shamt[1]&~shamt[0]&inputa[7])
					|(~shamt[4]&~shamt[3]& shamt[2]& shamt[1]& shamt[0]&inputa[6])
					|(~shamt[4]& shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[5])
					|(~shamt[4]& shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[4])
					|(~shamt[4]& shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[3])
					|(~shamt[4]& shamt[3]&~shamt[2]& shamt[1]& shamt[0]&inputa[2])
					|(~shamt[4]& shamt[3]& shamt[2]&~shamt[1]&~shamt[0]&inputa[1])
					|(~shamt[4]& shamt[3]& shamt[2]&~shamt[1]& shamt[0]&inputa[0]);

		outreg[14]<= (~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[14])
					|(~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[13])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[12])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]& shamt[0]&inputa[11])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]&~shamt[0]&inputa[10])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]& shamt[0]&inputa[9])
					|(~shamt[4]&~shamt[3]& shamt[2]& shamt[1]&~shamt[0]&inputa[8])
					|(~shamt[4]&~shamt[3]& shamt[2]& shamt[1]& shamt[0]&inputa[7])
					|(~shamt[4]& shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[6])
					|(~shamt[4]& shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[5])
					|(~shamt[4]& shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[4])
					|(~shamt[4]& shamt[3]&~shamt[2]& shamt[1]& shamt[0]&inputa[3])
					|(~shamt[4]& shamt[3]& shamt[2]&~shamt[1]&~shamt[0]&inputa[2])
					|(~shamt[4]& shamt[3]& shamt[2]&~shamt[1]& shamt[0]&inputa[1])
					|(~shamt[4]& shamt[3]& shamt[2]& shamt[1]&~shamt[0]&inputa[0]);

		outreg[15]<= (~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[15])
					|(~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[14])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[13])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]& shamt[0]&inputa[12])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]&~shamt[0]&inputa[11])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]& shamt[0]&inputa[10])
					|(~shamt[4]&~shamt[3]& shamt[2]& shamt[1]&~shamt[0]&inputa[9])
					|(~shamt[4]&~shamt[3]& shamt[2]& shamt[1]& shamt[0]&inputa[8])
					|(~shamt[4]& shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[7])
					|(~shamt[4]& shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[6])
					|(~shamt[4]& shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[5])
					|(~shamt[4]& shamt[3]&~shamt[2]& shamt[1]& shamt[0]&inputa[4])
					|(~shamt[4]& shamt[3]& shamt[2]&~shamt[1]&~shamt[0]&inputa[3])
					|(~shamt[4]& shamt[3]& shamt[2]&~shamt[1]& shamt[0]&inputa[2])
					|(~shamt[4]& shamt[3]& shamt[2]& shamt[1]&~shamt[0]&inputa[1])
					|(~shamt[4]& shamt[3]& shamt[2]& shamt[1]& shamt[0]&inputa[0]);

		outreg[16]<= (~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[16])
					|(~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[15])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[14])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]& shamt[0]&inputa[13])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]&~shamt[0]&inputa[12])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]& shamt[0]&inputa[11])
					|(~shamt[4]&~shamt[3]& shamt[2]& shamt[1]&~shamt[0]&inputa[10])
					|(~shamt[4]&~shamt[3]& shamt[2]& shamt[1]& shamt[0]&inputa[9])
					|(~shamt[4]& shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[8])
					|(~shamt[4]& shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[7])
					|(~shamt[4]& shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[6])
					|(~shamt[4]& shamt[3]&~shamt[2]& shamt[1]& shamt[0]&inputa[5])
					|(~shamt[4]& shamt[3]& shamt[2]&~shamt[1]&~shamt[0]&inputa[4])
					|(~shamt[4]& shamt[3]& shamt[2]&~shamt[1]& shamt[0]&inputa[3])
					|(~shamt[4]& shamt[3]& shamt[2]& shamt[1]&~shamt[0]&inputa[2])
					|(~shamt[4]& shamt[3]& shamt[2]& shamt[1]& shamt[0]&inputa[1])
					|( shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[0]);	

		outreg[17]<= (~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[17])
					|(~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[16])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[15])
					|(~shamt[4]&~shamt[3]&~shamt[2]& shamt[1]& shamt[0]&inputa[14])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]&~shamt[0]&inputa[13])
					|(~shamt[4]&~shamt[3]& shamt[2]&~shamt[1]& shamt[0]&inputa[12])
					|(~shamt[4]&~shamt[3]& shamt[2]& shamt[1]&~shamt[0]&inputa[11])
					|(~shamt[4]&~shamt[3]& shamt[2]& shamt[1]& shamt[0]&inputa[10])
					|(~shamt[4]& shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[9])
					|(~shamt[4]& shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[8])
					|(~shamt[4]& shamt[3]&~shamt[2]& shamt[1]&~shamt[0]&inputa[7])
					|(~shamt[4]& shamt[3]&~shamt[2]& shamt[1]& shamt[0]&inputa[6])
					|(~shamt[4]& shamt[3]& shamt[2]&~shamt[1]&~shamt[0]&inputa[5])
					|(~shamt[4]& shamt[3]& shamt[2]&~shamt[1]& shamt[0]&inputa[4])
					|(~shamt[4]& shamt[3]& shamt[2]& shamt[1]&~shamt[0]&inputa[3])
					|(~shamt[4]& shamt[3]& shamt[2]& shamt[1]& shamt[0]&inputa[2])
					|( shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[1])
					|( shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]& shamt[0]&inputa[0]);	

		outreg[18]<= (~shamt[4]&~shamt[3]&~shamt[2]&~shamt[1]&~shamt[0]&inputa[18])