//#############################################################################
//# Function: Carry Save Adder (6:2)                                          #
//#############################################################################
//# Author:   Andreas Olofsson                                                #
//# License:  MIT (see LICENSE file in OH! repository)                        #
//#############################################################################

module oh_csa62
  #(parameter N    = 1,        // number of sync stages
    parameter SYN  = "TRUE",   // synthesizable (or not)
    parameter TYPE = "DEFAULT" // scell type/size
    )
   ( input [N-1:0]  in0, //input
     input [N-1:0]  in1,//input
     input [N-1:0]  in2,//input
     input [N-1:0]  in3,//input
     input [N-1:0]  in4,//input
     input [N-1:0]  in5,//input
     input [N-1:0]  cin0,//carry in
     input [N-1:0]  cin1,//carry in
     input [N-1:0]  cin2,//carry in
     output [N-1:0] s, //sum
     output [N-1:0] c, //carry
     output [N-1:0] cout0, //carry out
     output [N-1:0] cout1, //carry out
     output [N-1:0] cout2  //carry out
     );

   wire   [N-1:0] s_int0;
   wire [N-1:0]   s_int1;

   oh_csa32 #(.N(N),
	      .TYPE(TYPE),
	      .SYN(SYN))
   csa32_0 (.in0(in0[N-1:0]),
	    .in1(in1[N-1:0]),
	    .in2(in2[N-1:0]),
	    .c(cout0[N-1:0]),
	    .s(s_int0[N-1:0]));

   oh_csa32 #(.N(N),
	      .TYPE(TYPE),
	      .SYN(SYN))
   csa32_1 (.in0(in3[N-1:0]),
	    .in1(in4[N-1:0]),
	    .in2(in5[N-1:0]),
	    .c(cout1[N-1:0]),
	    .s(s_int1[N-1:0]));

   oh_csa42  #(.N(N),
	       .TYPE(TYPE),
	       .SYN(SYN))
   csa42 (.in0(s_int0[N-1:0]),
	  .in1(s_int1[N-1:0]),
	  .in2(cin0[N-1:0]),
	  .in3(cin1[N-1:0]),
	  .cin(cin2[N-1:0]),
	  .cout(cout2[N-1:0]),
	  .c(c[N-1:0]),
	  .s(s[N-1:0]));

endmodule // oh_csa62