Branch_Unit.v

// msrv32_branch_unit 21BCE0289
module msrv32_branch_unit(
	input [31:0] rs1_in,
	input [31:0] rs2_in,
	input [4:0] opcode_6_to_2_in,
	input [2:0] funct3_in,
	output reg branch_taken_out
);
	parameter BRANCH = 5'B110_00,
		JAL = 5'b110_11,
		JALR = 5'b110_01;

	parameter EQS = 3'b000,
		NEQ = 3'b001,
		LT = 3'b100,
		GTE = 3'b101,
		LTU = 3'b110,
		GTEU = 3'b111;

	always @(*) begin
		case(opcode_6_to_2_in)
			BRANCH:	begin
				case(funct3_in)
					EQS:	branch_taken_out = (rs1_in == rs2_in) ? 1'b1 : 1'b0;
					NEQ:	branch_taken_out = (rs1_in != rs2_in) ? 1'b1 : 1'b0;
					LT:	branch_taken_out = ($signed(rs1_in) < $signed(rs2_in)) ? 1'b1 : 1'b0;
					GTE:	branch_taken_out = ($signed(rs1_in) >= $signed(rs2_in)) ? 1'b1 : 1'b0;
					LTU:	branch_taken_out = (rs1_in < rs2_in) ? 1'b1 : 1'b0;
					GTEU:	branch_taken_out = (rs1_in >= rs2_in) ? 1'b1 : 1'b0;
					default:branch_taken_out = (rs1_in == rs2_in) ? 1'b1 : 1'b0;
				endcase
				end
			JAL:	branch_taken_out = 1'b1;
			JALR:	branch_taken_out = 1'b1;
			default:branch_taken_out = 1'b0;
		endcase
	end
endmodule