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ZirconiumX Jun 16th, 2019 84 Never
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  1. (* techmap_celltype = "$add" *)
  2. module _80_74283_add (A, B, Y);
  3.  
  4. parameter A_SIGNED = 0;
  5. parameter B_SIGNED = 0;
  6. parameter A_WIDTH = 4;
  7. parameter B_WIDTH = 4;
  8. parameter Y_WIDTH = 4;
  9.  
  10. input [A_WIDTH-1:0] A;
  11. input [B_WIDTH-1:0] B;
  12. output [Y_WIDTH-1:0] Y;
  13.  
  14. wire _TECHMAP_FAIL_ = Y_WIDTH <= 1;
  15.  
  16. localparam WIDTH = ((Y_WIDTH + 3) / 4) * 4;
  17.  
  18. wire [Y_WIDTH-1:0] A_buf, B_buf;
  19. wire [WIDTH-1:0] Y_buf;
  20. \$pos #(.A_SIGNED(A_SIGNED), .A_WIDTH(A_WIDTH), .Y_WIDTH(Y_WIDTH)) A_conv (.A(A), .Y(A_buf));
  21. \$pos #(.A_SIGNED(B_SIGNED), .A_WIDTH(B_WIDTH), .Y_WIDTH(Y_WIDTH)) B_conv (.A(B), .Y(B_buf));
  22.  
  23. wire [Y_WIDTH-1:0] AA = A_buf;
  24. wire [Y_WIDTH-1:0] BB = B_buf;
  25. wire [WIDTH-1:0] YY = Y_buf;
  26. wire [Y_WIDTH:0] C;
  27.  
  28. assign C[0] = 0;
  29.  
  30. genvar i;
  31. generate for (i = 0; i < WIDTH; i = i + 4) begin:slice
  32.     \74283 adder_i (
  33.         .A(AA[i+3:i]),
  34.         .B(BB[i+3:i]),
  35.         .CI(C[i]),
  36.         .S(YY[i+3:i]),
  37.         .CO(C[i+4]),
  38.     );
  39. end
  40. endgenerate
  41.  
  42. assign Y = YY[Y_WIDTH-1:0];
  43.  
  44. endmodule
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