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[/] [xilinx_virtex_fp_library/] [trunk/] [DualPathFPAdder/] [special_cases.v] - Rev 17
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`timescale 1ns / 1ps ////////////////////////////////////////////////////////////////////////////////// // Company: // Engineer: // // Create Date: 18:56:11 10/07/2013 // Design Name: // Module Name: special_cases_mul_acc // Project Name: // Target Devices: // Tool versions: // Description: // // Dependencies: // // Revision: // Revision 0.01 - File Created // Additional Comments: // ////////////////////////////////////////////////////////////////////////////////// module special_cases #( parameter size_exception_field = 2'd2, parameter [size_exception_field - 1 : 0] zero = 0, //00 parameter [size_exception_field - 1 : 0] normal_number= 1, //01 parameter [size_exception_field - 1 : 0] infinity = 2, //10 parameter [size_exception_field - 1 : 0] NaN = 3) //11 ( input [size_exception_field - 1 : 0] sp_case_a_number, input [size_exception_field - 1 : 0] sp_case_b_number, output reg [size_exception_field - 1 : 0] sp_case_result_o); always @(*) begin case ({sp_case_a_number, sp_case_b_number}) {zero, zero}: sp_case_result_o = zero; {zero, normal_number}: sp_case_result_o = normal_number; {zero, infinity}: sp_case_result_o = infinity; {zero, NaN}: sp_case_result_o = NaN; {normal_number,zero}: sp_case_result_o = normal_number; {normal_number,normal_number}: sp_case_result_o = normal_number; {normal_number,infinity}: sp_case_result_o = infinity; {normal_number,NaN}: sp_case_result_o = NaN; {infinity, zero}: sp_case_result_o = infinity; {infinity, normal_number}: sp_case_result_o = infinity; {infinity, infinity}: sp_case_result_o = infinity; {infinity, NaN}: sp_case_result_o = NaN; {NaN, zero}: sp_case_result_o = NaN; {NaN, normal_number}: sp_case_result_o = NaN; {NaN, infinity}: sp_case_result_o = NaN; {NaN, NaN}: sp_case_result_o = NaN; default: sp_case_result_o = zero; endcase end endmodule
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