Subversion Repositories an-fpga-implementation-of-low-latency-noc-based-mpsoc

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//                         FILE DETAILS
// Project          : LatticeMico32
// File             : lm32_addsub.v
// Title            : PMI adder/subtractor.
// Version          : 6.1.17
//                  : Initial Release
// Version          : 7.0SP2, 3.0
//                  : No Change
// Version          : 3.1
//                  : No Change
// =============================================================================
 
`include "lm32_include.v"
 
/////////////////////////////////////////////////////
// Module interface
/////////////////////////////////////////////////////
 
module lm32_addsub (
    // ----- Inputs -------
    DataA,
    DataB,
    Cin,
    Add_Sub,
    // ----- Outputs -------
    Result,
    Cout
    );
 
/////////////////////////////////////////////////////
// Inputs
/////////////////////////////////////////////////////
 
input [31:0] DataA;
input [31:0] DataB;
input Cin;
input Add_Sub;
 
/////////////////////////////////////////////////////
// Outputs
/////////////////////////////////////////////////////
 
output [31:0] Result;
wire   [31:0] Result;
output Cout;
wire   Cout;
 
/////////////////////////////////////////////////////
// Instantiations
/////////////////////////////////////////////////////
 
// Modified for Milkymist: removed non-portable instantiated block
wire [32:0] tmp_addResult = DataA + DataB + Cin;
wire [32:0] tmp_subResult = DataA - DataB - !Cin;
 
assign  Result = (Add_Sub == 1) ? tmp_addResult[31:0] : tmp_subResult[31:0];
assign  Cout = (Add_Sub == 1) ? tmp_addResult[32] : !tmp_subResult[32];
 
endmodule