2-bit Left Shift

32位元左移2位元

// 32-bit Shift left by 2
module leftShift2 (in,out);
input [31:0] in;
output [31:0] out;
reg [31:0] out;
out = { in[29:0], 1'b0, 1'b0 };
endmodule // leftShift2

module leftShift2 (in,out);
input [31:0] in;
output [31:0] out;
reg [31:0] out;
out = in << 2;
endmodule

參考來源：
http://inst.eecs.berkeley.edu/~cs61c/fa04/lectures/L26-dg-singlecpu.pdf