EvoApproxLib^LITE

/***
* This code is a part of EvoApproxLib library (ehw.fit.vutbr.cz/approxlib) distributed under The MIT License.
* When used, please cite the following article(s): V. Mrazek, Z. Vasicek, L. Sekanina, H. Jiang and J. Han, "Scalable Construction of Approximate Multipliers With Formally Guaranteed Worst Case Error" in IEEE Transactions on Very Large Scale Integration (VLSI) Systems, vol. 26, no. 11, pp. 2572-2576, Nov. 2018. doi: 10.1109/TVLSI.2018.2856362 
* This file contains a circuit from a sub-set of pareto optimal circuits with respect to the pwr and mae parameters
***/
// MAE% = 0.52 %
// MAE = 340 
// WCE% = 2.66 %
// WCE = 1743 
// WCRE% = 6300.00 %
// EP% = 97.75 %
// MRE% = 27.44 %
// MSE = 191238 
// PDK45_PWR = 0.126 mW
// PDK45_AREA = 284.9 um2
// PDK45_DELAY = 0.94 ns


module mul8s_1L2N ( A, B, O );
  input [7:0] A;
  input [7:0] B;
  output [15:0] O;

  wire C_4_3,C_4_4,C_4_5,C_4_6,C_4_7,C_5_3,C_5_4,C_5_5,C_5_6,C_5_7,C_6_3,C_6_4,C_6_5,C_6_6,C_6_7,C_7_3,C_7_4,C_7_5,C_7_6,C_7_7,C_8_3,C_8_4,C_8_5,C_8_6,C_8_7,S_3_3,S_3_4,S_3_5,S_3_6,S_3_7,S_4_2,S_4_3,S_4_4,S_4_5,S_4_6,S_4_7,S_5_1,S_5_2,S_5_3,S_5_4,S_5_5,S_5_6,S_5_7,S_6_0,S_6_1,S_6_2,S_6_3,S_6_4,S_6_5,S_6_6,S_6_7,S_7_0,S_7_1,S_7_2,S_7_3,S_7_4,S_7_5,S_7_6,S_7_7,S_8_0,S_8_1,S_8_2,S_8_3,S_8_4,S_8_5,S_8_6,S_8_7;

  assign S_3_3 = (A[3] & B[3]);
  assign S_3_4 = (A[3] & B[4]);
  assign S_3_5 = (A[3] & B[5]);
  assign S_3_6 = (A[3] & B[6]);
  assign S_3_7 = ~(A[3] & B[7]);
  assign S_4_2 = S_3_3;
  HAX1 U468 (.A(S_3_4), .B((A[4] & B[3])), .YS(S_4_3), .YC(C_4_3));
  HAX1 U469 (.A(S_3_5), .B((A[4] & B[4])), .YS(S_4_4), .YC(C_4_4));
  HAX1 U470 (.A(S_3_6), .B((A[4] & B[5])), .YS(S_4_5), .YC(C_4_5));
  HAX1 U471 (.A(S_3_7), .B((A[4] & B[6])), .YS(S_4_6), .YC(C_4_6));
  HAX1 U472 (.A(1'b1), .B(~(A[4] & B[7])), .YS(S_4_7), .YC(C_4_7));
  assign S_5_1 = S_4_2;
  assign S_5_2 = S_4_3;
  FAX1 U476 (.A(S_4_4), .B(C_4_3), .C((A[5] & B[3])), .YS(S_5_3), .YC(C_5_3));
  FAX1 U477 (.A(S_4_5), .B(C_4_4), .C((A[5] & B[4])), .YS(S_5_4), .YC(C_5_4));
  FAX1 U478 (.A(S_4_6), .B(C_4_5), .C((A[5] & B[5])), .YS(S_5_5), .YC(C_5_5));
  FAX1 U479 (.A(S_4_7), .B(C_4_6), .C((A[5] & B[6])), .YS(S_5_6), .YC(C_5_6));
  HAX1 U480 (.A(C_4_7), .B(~(A[5] & B[7])), .YS(S_5_7), .YC(C_5_7));
  assign S_6_0 = S_5_1;
  assign S_6_1 = S_5_2;
  assign S_6_2 = S_5_3;
  FAX1 U484 (.A(S_5_4), .B(C_5_3), .C((A[6] & B[3])), .YS(S_6_3), .YC(C_6_3));
  FAX1 U485 (.A(S_5_5), .B(C_5_4), .C((A[6] & B[4])), .YS(S_6_4), .YC(C_6_4));
  FAX1 U486 (.A(S_5_6), .B(C_5_5), .C((A[6] & B[5])), .YS(S_6_5), .YC(C_6_5));
  FAX1 U487 (.A(S_5_7), .B(C_5_6), .C((A[6] & B[6])), .YS(S_6_6), .YC(C_6_6));
  HAX1 U488 (.A(C_5_7), .B(~(A[6] & B[7])), .YS(S_6_7), .YC(C_6_7));
  assign S_7_0 = S_6_1;
  assign S_7_1 = S_6_2;
  assign S_7_2 = S_6_3;
  FAX1 U492 (.A(S_6_4), .B(C_6_3), .C(~(A[7] & B[3])), .YS(S_7_3), .YC(C_7_3));
  FAX1 U493 (.A(S_6_5), .B(C_6_4), .C(~(A[7] & B[4])), .YS(S_7_4), .YC(C_7_4));
  FAX1 U494 (.A(S_6_6), .B(C_6_5), .C(~(A[7] & B[5])), .YS(S_7_5), .YC(C_7_5));
  FAX1 U495 (.A(S_6_7), .B(C_6_6), .C(~(A[7] & B[6])), .YS(S_7_6), .YC(C_7_6));
  HAX1 U496 (.A(C_6_7), .B((A[7] & B[7])), .YS(S_7_7), .YC(C_7_7));
  assign S_8_0 = S_7_1;
  assign S_8_1 = S_7_2;
  assign S_8_2 = S_7_3;
  HAX1 U500 (.A(S_7_4), .B(C_7_3), .YS(S_8_3), .YC(C_8_3));
  FAX1 U501 (.A(S_7_5), .B(C_8_3), .C(C_7_4), .YS(S_8_4), .YC(C_8_4));
  FAX1 U502 (.A(S_7_6), .B(C_8_4), .C(C_7_5), .YS(S_8_5), .YC(C_8_5));
  FAX1 U503 (.A(S_7_7), .B(C_8_5), .C(C_7_6), .YS(S_8_6), .YC(C_8_6));
  FAX1 U504 (.A(1'b1), .B(C_8_6), .C(C_7_7), .YS(S_8_7), .YC(C_8_7));
  assign O = {S_8_7,S_8_6,S_8_5,S_8_4,S_8_3,S_8_2,S_8_1,S_8_0,S_7_0,S_6_0,1'b0,1'b0,1'b0,1'b0,1'b0,1'b0};

endmodule