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/* This file is part of JT51. JT51 is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. JT51 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with JT51. If not, see <http://www.gnu.org/licenses/>. Author: Jose Tejada Gomez. Twitter: @topapate Version: 1.0 Date: 27-10-2016 */ `timescale 1ns / 1ps module jt51_lin2exp( input [15:0] lin, output reg [9:0] man, output reg [2:0] exp ); always @(*) begin casex( lin[15:9] ) // negative numbers 7'b10XXXXX: begin man <= lin[15:6]; exp <= 3'd7; end 7'b110XXXX: begin man <= lin[14:5]; exp <= 3'd6; end 7'b1110XXX: begin man <= lin[13:4]; exp <= 3'd5; end 7'b11110XX: begin man <= lin[12:3]; exp <= 3'd4; end 7'b111110X: begin man <= lin[11:2]; exp <= 3'd3; end 7'b1111110: begin man <= lin[10:1]; exp <= 3'd2; end 7'b1111111: begin man <= lin[ 9:0]; exp <= 3'd1; end // positive numbers 7'b01XXXXX: begin man <= lin[15:6]; exp <= 3'd7; end 7'b001XXXX: begin man <= lin[14:5]; exp <= 3'd6; end 7'b0001XXX: begin man <= lin[13:4]; exp <= 3'd5; end 7'b00001XX: begin man <= lin[12:3]; exp <= 3'd4; end 7'b000001X: begin man <= lin[11:2]; exp <= 3'd3; end 7'b0000001: begin man <= lin[10:1]; exp <= 3'd2; end 7'b0000000: begin man <= lin[ 9:0]; exp <= 3'd1; end default: begin man <= lin[9:0]; exp <= 3'd1; end endcase end endmodule