You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
33 lines
907 B
33 lines
907 B
`timescale 1ns / 1ps
|
|
// 数据定向处理单元
|
|
module ForwardingUnit (
|
|
input logic [4:0] rs1,
|
|
input logic [4:0] rs2,
|
|
input logic [4:0] ex_mem_rd,
|
|
input logic [4:0] mem_wb_rd,
|
|
input logic ex_mem_regwrite,
|
|
input logic mem_wb_regwrite,
|
|
output logic [1:0] forward_a,
|
|
output logic [1:0] forward_b
|
|
);
|
|
|
|
// define your forwarding logic here.
|
|
always_comb
|
|
begin
|
|
if ((rs1 != 0) && (rs1 == ex_mem_rd) && ex_mem_regwrite)
|
|
forward_a = 2'b01;
|
|
else if ((rs1 != 0) && (rs1 == mem_wb_rd) && mem_wb_regwrite)
|
|
forward_a = 2'b10;
|
|
else
|
|
forward_a = 2'b00;
|
|
|
|
if ((rs2 != 0) && (rs2 == ex_mem_rd) && ex_mem_regwrite)
|
|
forward_b = 2'b01;
|
|
else if ((rs2 != 0) && (rs2 == mem_wb_rd) && mem_wb_regwrite)
|
|
forward_b = 2'b10;
|
|
else
|
|
forward_b = 2'b00;
|
|
end
|
|
|
|
endmodule
|