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mul12s_2QD_pdk45.v
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mul12s_2QD_pdk45.v
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/***
* 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 ep parameters
***/
// MAE% = 0.0031 %
// MAE = 512
// WCE% = 0.012 %
// WCE = 2048
// WCRE% = 100.00 %
// EP% = 49.99 %
// MRE% = 0.22 %
// MSE = 699051
// PDK45_PWR = 1.093 mW
// PDK45_AREA = 1528.0 um2
// PDK45_DELAY = 2.24 ns
module mul12s_2QD ( A, B, O );
input [11:0] A;
input [11:0] B;
output [23:0] O;
wire C_10_0,C_10_1,C_10_10,C_10_11,C_10_2,C_10_3,C_10_4,C_10_5,C_10_6,C_10_7,C_10_8,C_10_9,C_11_0,C_11_1,C_11_10,C_11_11,C_11_2,C_11_3,C_11_4,C_11_5,C_11_6,C_11_7,C_11_8,C_11_9,C_12_0,C_12_1,C_12_10,C_12_11,C_12_2,C_12_3,C_12_4,C_12_5,C_12_6,C_12_7,C_12_8,C_12_9,C_1_10,C_1_11,C_2_0,C_2_1,C_2_10,C_2_11,C_2_2,C_2_3,C_2_4,C_2_5,C_2_6,C_2_7,C_2_8,C_2_9,C_3_0,C_3_1,C_3_10,C_3_11,C_3_2,C_3_3,C_3_4,C_3_5,C_3_6,C_3_7,C_3_8,C_3_9,C_4_0,C_4_1,C_4_10,C_4_11,C_4_2,C_4_3,C_4_4,C_4_5,C_4_6,C_4_7,C_4_8,C_4_9,C_5_0,C_5_1,C_5_10,C_5_11,C_5_2,C_5_3,C_5_4,C_5_5,C_5_6,C_5_7,C_5_8,C_5_9,C_6_0,C_6_1,C_6_10,C_6_11,C_6_2,C_6_3,C_6_4,C_6_5,C_6_6,C_6_7,C_6_8,C_6_9,C_7_0,C_7_1,C_7_10,C_7_11,C_7_2,C_7_3,C_7_4,C_7_5,C_7_6,C_7_7,C_7_8,C_7_9,C_8_0,C_8_1,C_8_10,C_8_11,C_8_2,C_8_3,C_8_4,C_8_5,C_8_6,C_8_7,C_8_8,C_8_9,C_9_0,C_9_1,C_9_10,C_9_11,C_9_2,C_9_3,C_9_4,C_9_5,C_9_6,C_9_7,C_9_8,C_9_9,S_0_11,S_10_0,S_10_1,S_10_10,S_10_11,S_10_2,S_10_3,S_10_4,S_10_5,S_10_6,S_10_7,S_10_8,S_10_9,S_11_0,S_11_1,S_11_10,S_11_11,S_11_2,S_11_3,S_11_4,S_11_5,S_11_6,S_11_7,S_11_8,S_11_9,S_12_0,S_12_1,S_12_10,S_12_11,S_12_2,S_12_3,S_12_4,S_12_5,S_12_6,S_12_7,S_12_8,S_12_9,S_1_0,S_1_1,S_1_10,S_1_11,S_1_2,S_1_3,S_1_4,S_1_5,S_1_6,S_1_7,S_1_8,S_1_9,S_2_0,S_2_1,S_2_10,S_2_11,S_2_2,S_2_3,S_2_4,S_2_5,S_2_6,S_2_7,S_2_8,S_2_9,S_3_0,S_3_1,S_3_10,S_3_11,S_3_2,S_3_3,S_3_4,S_3_5,S_3_6,S_3_7,S_3_8,S_3_9,S_4_0,S_4_1,S_4_10,S_4_11,S_4_2,S_4_3,S_4_4,S_4_5,S_4_6,S_4_7,S_4_8,S_4_9,S_5_0,S_5_1,S_5_10,S_5_11,S_5_2,S_5_3,S_5_4,S_5_5,S_5_6,S_5_7,S_5_8,S_5_9,S_6_0,S_6_1,S_6_10,S_6_11,S_6_2,S_6_3,S_6_4,S_6_5,S_6_6,S_6_7,S_6_8,S_6_9,S_7_0,S_7_1,S_7_10,S_7_11,S_7_2,S_7_3,S_7_4,S_7_5,S_7_6,S_7_7,S_7_8,S_7_9,S_8_0,S_8_1,S_8_10,S_8_11,S_8_2,S_8_3,S_8_4,S_8_5,S_8_6,S_8_7,S_8_8,S_8_9,S_9_0,S_9_1,S_9_10,S_9_11,S_9_2,S_9_3,S_9_4,S_9_5,S_9_6,S_9_7,S_9_8,S_9_9;
assign S_0_11 = 1'b1;
assign S_1_0 = (A[1] & B[0]);
assign S_1_1 = (A[1] & B[1]);
assign S_1_2 = (A[1] & B[2]);
assign S_1_3 = (A[1] & B[3]);
assign S_1_4 = (A[1] & B[4]);
assign S_1_5 = (A[1] & B[5]);
assign S_1_6 = (A[1] & B[6]);
assign S_1_7 = (A[1] & B[7]);
assign S_1_8 = (A[1] & B[8]);
assign S_1_9 = (A[1] & B[9]);
HAX1 U20447 (.A(S_0_11), .B((A[1] & B[10])), .YS(S_1_10), .YC(C_1_10));
HAX1 U20448 (.A(1'b1), .B(~(A[1] & B[11])), .YS(S_1_11), .YC(C_1_11));
HAX1 U20449 (.A(S_1_1), .B((A[2] & B[0])), .YS(S_2_0), .YC(C_2_0));
HAX1 U20450 (.A(S_1_2), .B((A[2] & B[1])), .YS(S_2_1), .YC(C_2_1));
HAX1 U20451 (.A(S_1_3), .B((A[2] & B[2])), .YS(S_2_2), .YC(C_2_2));
HAX1 U20452 (.A(S_1_4), .B((A[2] & B[3])), .YS(S_2_3), .YC(C_2_3));
HAX1 U20453 (.A(S_1_5), .B((A[2] & B[4])), .YS(S_2_4), .YC(C_2_4));
HAX1 U20454 (.A(S_1_6), .B((A[2] & B[5])), .YS(S_2_5), .YC(C_2_5));
HAX1 U20455 (.A(S_1_7), .B((A[2] & B[6])), .YS(S_2_6), .YC(C_2_6));
HAX1 U20456 (.A(S_1_8), .B((A[2] & B[7])), .YS(S_2_7), .YC(C_2_7));
HAX1 U20457 (.A(S_1_9), .B((A[2] & B[8])), .YS(S_2_8), .YC(C_2_8));
HAX1 U20458 (.A(S_1_10), .B((A[2] & B[9])), .YS(S_2_9), .YC(C_2_9));
FAX1 U20459 (.A(S_1_11), .B(C_1_10), .C((A[2] & B[10])), .YS(S_2_10), .YC(C_2_10));
HAX1 U20460 (.A(C_1_11), .B(~(A[2] & B[11])), .YS(S_2_11), .YC(C_2_11));
FAX1 U20461 (.A(S_2_1), .B(C_2_0), .C((A[3] & B[0])), .YS(S_3_0), .YC(C_3_0));
FAX1 U20462 (.A(S_2_2), .B(C_2_1), .C((A[3] & B[1])), .YS(S_3_1), .YC(C_3_1));
FAX1 U20463 (.A(S_2_3), .B(C_2_2), .C((A[3] & B[2])), .YS(S_3_2), .YC(C_3_2));
FAX1 U20464 (.A(S_2_4), .B(C_2_3), .C((A[3] & B[3])), .YS(S_3_3), .YC(C_3_3));
FAX1 U20465 (.A(S_2_5), .B(C_2_4), .C((A[3] & B[4])), .YS(S_3_4), .YC(C_3_4));
FAX1 U20466 (.A(S_2_6), .B(C_2_5), .C((A[3] & B[5])), .YS(S_3_5), .YC(C_3_5));
FAX1 U20467 (.A(S_2_7), .B(C_2_6), .C((A[3] & B[6])), .YS(S_3_6), .YC(C_3_6));
FAX1 U20468 (.A(S_2_8), .B(C_2_7), .C((A[3] & B[7])), .YS(S_3_7), .YC(C_3_7));
FAX1 U20469 (.A(S_2_9), .B(C_2_8), .C((A[3] & B[8])), .YS(S_3_8), .YC(C_3_8));
FAX1 U20470 (.A(S_2_10), .B(C_2_9), .C((A[3] & B[9])), .YS(S_3_9), .YC(C_3_9));
FAX1 U20471 (.A(S_2_11), .B(C_2_10), .C((A[3] & B[10])), .YS(S_3_10), .YC(C_3_10));
HAX1 U20472 (.A(C_2_11), .B(~(A[3] & B[11])), .YS(S_3_11), .YC(C_3_11));
FAX1 U20473 (.A(S_3_1), .B(C_3_0), .C((A[4] & B[0])), .YS(S_4_0), .YC(C_4_0));
FAX1 U20474 (.A(S_3_2), .B(C_3_1), .C((A[4] & B[1])), .YS(S_4_1), .YC(C_4_1));
FAX1 U20475 (.A(S_3_3), .B(C_3_2), .C((A[4] & B[2])), .YS(S_4_2), .YC(C_4_2));
FAX1 U20476 (.A(S_3_4), .B(C_3_3), .C((A[4] & B[3])), .YS(S_4_3), .YC(C_4_3));
FAX1 U20477 (.A(S_3_5), .B(C_3_4), .C((A[4] & B[4])), .YS(S_4_4), .YC(C_4_4));
FAX1 U20478 (.A(S_3_6), .B(C_3_5), .C((A[4] & B[5])), .YS(S_4_5), .YC(C_4_5));
FAX1 U20479 (.A(S_3_7), .B(C_3_6), .C((A[4] & B[6])), .YS(S_4_6), .YC(C_4_6));
FAX1 U20480 (.A(S_3_8), .B(C_3_7), .C((A[4] & B[7])), .YS(S_4_7), .YC(C_4_7));
FAX1 U20481 (.A(S_3_9), .B(C_3_8), .C((A[4] & B[8])), .YS(S_4_8), .YC(C_4_8));
FAX1 U20482 (.A(S_3_10), .B(C_3_9), .C((A[4] & B[9])), .YS(S_4_9), .YC(C_4_9));
FAX1 U20483 (.A(S_3_11), .B(C_3_10), .C((A[4] & B[10])), .YS(S_4_10), .YC(C_4_10));
HAX1 U20484 (.A(C_3_11), .B(~(A[4] & B[11])), .YS(S_4_11), .YC(C_4_11));
FAX1 U20485 (.A(S_4_1), .B(C_4_0), .C((A[5] & B[0])), .YS(S_5_0), .YC(C_5_0));
FAX1 U20486 (.A(S_4_2), .B(C_4_1), .C((A[5] & B[1])), .YS(S_5_1), .YC(C_5_1));
FAX1 U20487 (.A(S_4_3), .B(C_4_2), .C((A[5] & B[2])), .YS(S_5_2), .YC(C_5_2));
FAX1 U20488 (.A(S_4_4), .B(C_4_3), .C((A[5] & B[3])), .YS(S_5_3), .YC(C_5_3));
FAX1 U20489 (.A(S_4_5), .B(C_4_4), .C((A[5] & B[4])), .YS(S_5_4), .YC(C_5_4));
FAX1 U20490 (.A(S_4_6), .B(C_4_5), .C((A[5] & B[5])), .YS(S_5_5), .YC(C_5_5));
FAX1 U20491 (.A(S_4_7), .B(C_4_6), .C((A[5] & B[6])), .YS(S_5_6), .YC(C_5_6));
FAX1 U20492 (.A(S_4_8), .B(C_4_7), .C((A[5] & B[7])), .YS(S_5_7), .YC(C_5_7));
FAX1 U20493 (.A(S_4_9), .B(C_4_8), .C((A[5] & B[8])), .YS(S_5_8), .YC(C_5_8));
FAX1 U20494 (.A(S_4_10), .B(C_4_9), .C((A[5] & B[9])), .YS(S_5_9), .YC(C_5_9));
FAX1 U20495 (.A(S_4_11), .B(C_4_10), .C((A[5] & B[10])), .YS(S_5_10), .YC(C_5_10));
HAX1 U20496 (.A(C_4_11), .B(~(A[5] & B[11])), .YS(S_5_11), .YC(C_5_11));
FAX1 U20497 (.A(S_5_1), .B(C_5_0), .C((A[6] & B[0])), .YS(S_6_0), .YC(C_6_0));
FAX1 U20498 (.A(S_5_2), .B(C_5_1), .C((A[6] & B[1])), .YS(S_6_1), .YC(C_6_1));
FAX1 U20499 (.A(S_5_3), .B(C_5_2), .C((A[6] & B[2])), .YS(S_6_2), .YC(C_6_2));
FAX1 U20500 (.A(S_5_4), .B(C_5_3), .C((A[6] & B[3])), .YS(S_6_3), .YC(C_6_3));
FAX1 U20501 (.A(S_5_5), .B(C_5_4), .C((A[6] & B[4])), .YS(S_6_4), .YC(C_6_4));
FAX1 U20502 (.A(S_5_6), .B(C_5_5), .C((A[6] & B[5])), .YS(S_6_5), .YC(C_6_5));
FAX1 U20503 (.A(S_5_7), .B(C_5_6), .C((A[6] & B[6])), .YS(S_6_6), .YC(C_6_6));
FAX1 U20504 (.A(S_5_8), .B(C_5_7), .C((A[6] & B[7])), .YS(S_6_7), .YC(C_6_7));
FAX1 U20505 (.A(S_5_9), .B(C_5_8), .C((A[6] & B[8])), .YS(S_6_8), .YC(C_6_8));
FAX1 U20506 (.A(S_5_10), .B(C_5_9), .C((A[6] & B[9])), .YS(S_6_9), .YC(C_6_9));
FAX1 U20507 (.A(S_5_11), .B(C_5_10), .C((A[6] & B[10])), .YS(S_6_10), .YC(C_6_10));
HAX1 U20508 (.A(C_5_11), .B(~(A[6] & B[11])), .YS(S_6_11), .YC(C_6_11));
FAX1 U20509 (.A(S_6_1), .B(C_6_0), .C((A[7] & B[0])), .YS(S_7_0), .YC(C_7_0));
FAX1 U20510 (.A(S_6_2), .B(C_6_1), .C((A[7] & B[1])), .YS(S_7_1), .YC(C_7_1));
FAX1 U20511 (.A(S_6_3), .B(C_6_2), .C((A[7] & B[2])), .YS(S_7_2), .YC(C_7_2));
FAX1 U20512 (.A(S_6_4), .B(C_6_3), .C((A[7] & B[3])), .YS(S_7_3), .YC(C_7_3));
FAX1 U20513 (.A(S_6_5), .B(C_6_4), .C((A[7] & B[4])), .YS(S_7_4), .YC(C_7_4));
FAX1 U20514 (.A(S_6_6), .B(C_6_5), .C((A[7] & B[5])), .YS(S_7_5), .YC(C_7_5));
FAX1 U20515 (.A(S_6_7), .B(C_6_6), .C((A[7] & B[6])), .YS(S_7_6), .YC(C_7_6));
FAX1 U20516 (.A(S_6_8), .B(C_6_7), .C((A[7] & B[7])), .YS(S_7_7), .YC(C_7_7));
FAX1 U20517 (.A(S_6_9), .B(C_6_8), .C((A[7] & B[8])), .YS(S_7_8), .YC(C_7_8));
FAX1 U20518 (.A(S_6_10), .B(C_6_9), .C((A[7] & B[9])), .YS(S_7_9), .YC(C_7_9));
FAX1 U20519 (.A(S_6_11), .B(C_6_10), .C((A[7] & B[10])), .YS(S_7_10), .YC(C_7_10));
HAX1 U20520 (.A(C_6_11), .B(~(A[7] & B[11])), .YS(S_7_11), .YC(C_7_11));
FAX1 U20521 (.A(S_7_1), .B(C_7_0), .C((A[8] & B[0])), .YS(S_8_0), .YC(C_8_0));
FAX1 U20522 (.A(S_7_2), .B(C_7_1), .C((A[8] & B[1])), .YS(S_8_1), .YC(C_8_1));
FAX1 U20523 (.A(S_7_3), .B(C_7_2), .C((A[8] & B[2])), .YS(S_8_2), .YC(C_8_2));
FAX1 U20524 (.A(S_7_4), .B(C_7_3), .C((A[8] & B[3])), .YS(S_8_3), .YC(C_8_3));
FAX1 U20525 (.A(S_7_5), .B(C_7_4), .C((A[8] & B[4])), .YS(S_8_4), .YC(C_8_4));
FAX1 U20526 (.A(S_7_6), .B(C_7_5), .C((A[8] & B[5])), .YS(S_8_5), .YC(C_8_5));
FAX1 U20527 (.A(S_7_7), .B(C_7_6), .C((A[8] & B[6])), .YS(S_8_6), .YC(C_8_6));
FAX1 U20528 (.A(S_7_8), .B(C_7_7), .C((A[8] & B[7])), .YS(S_8_7), .YC(C_8_7));
FAX1 U20529 (.A(S_7_9), .B(C_7_8), .C((A[8] & B[8])), .YS(S_8_8), .YC(C_8_8));
FAX1 U20530 (.A(S_7_10), .B(C_7_9), .C((A[8] & B[9])), .YS(S_8_9), .YC(C_8_9));
FAX1 U20531 (.A(S_7_11), .B(C_7_10), .C((A[8] & B[10])), .YS(S_8_10), .YC(C_8_10));
HAX1 U20532 (.A(C_7_11), .B(~(A[8] & B[11])), .YS(S_8_11), .YC(C_8_11));
FAX1 U20533 (.A(S_8_1), .B(C_8_0), .C((A[9] & B[0])), .YS(S_9_0), .YC(C_9_0));
FAX1 U20534 (.A(S_8_2), .B(C_8_1), .C((A[9] & B[1])), .YS(S_9_1), .YC(C_9_1));
FAX1 U20535 (.A(S_8_3), .B(C_8_2), .C((A[9] & B[2])), .YS(S_9_2), .YC(C_9_2));
FAX1 U20536 (.A(S_8_4), .B(C_8_3), .C((A[9] & B[3])), .YS(S_9_3), .YC(C_9_3));
FAX1 U20537 (.A(S_8_5), .B(C_8_4), .C((A[9] & B[4])), .YS(S_9_4), .YC(C_9_4));
FAX1 U20538 (.A(S_8_6), .B(C_8_5), .C((A[9] & B[5])), .YS(S_9_5), .YC(C_9_5));
FAX1 U20539 (.A(S_8_7), .B(C_8_6), .C((A[9] & B[6])), .YS(S_9_6), .YC(C_9_6));
FAX1 U20540 (.A(S_8_8), .B(C_8_7), .C((A[9] & B[7])), .YS(S_9_7), .YC(C_9_7));
FAX1 U20541 (.A(S_8_9), .B(C_8_8), .C((A[9] & B[8])), .YS(S_9_8), .YC(C_9_8));
FAX1 U20542 (.A(S_8_10), .B(C_8_9), .C((A[9] & B[9])), .YS(S_9_9), .YC(C_9_9));
FAX1 U20543 (.A(S_8_11), .B(C_8_10), .C((A[9] & B[10])), .YS(S_9_10), .YC(C_9_10));
HAX1 U20544 (.A(C_8_11), .B(~(A[9] & B[11])), .YS(S_9_11), .YC(C_9_11));
FAX1 U20545 (.A(S_9_1), .B(C_9_0), .C((A[10] & B[0])), .YS(S_10_0), .YC(C_10_0));
FAX1 U20546 (.A(S_9_2), .B(C_9_1), .C((A[10] & B[1])), .YS(S_10_1), .YC(C_10_1));
FAX1 U20547 (.A(S_9_3), .B(C_9_2), .C((A[10] & B[2])), .YS(S_10_2), .YC(C_10_2));
FAX1 U20548 (.A(S_9_4), .B(C_9_3), .C((A[10] & B[3])), .YS(S_10_3), .YC(C_10_3));
FAX1 U20549 (.A(S_9_5), .B(C_9_4), .C((A[10] & B[4])), .YS(S_10_4), .YC(C_10_4));
FAX1 U20550 (.A(S_9_6), .B(C_9_5), .C((A[10] & B[5])), .YS(S_10_5), .YC(C_10_5));
FAX1 U20551 (.A(S_9_7), .B(C_9_6), .C((A[10] & B[6])), .YS(S_10_6), .YC(C_10_6));
FAX1 U20552 (.A(S_9_8), .B(C_9_7), .C((A[10] & B[7])), .YS(S_10_7), .YC(C_10_7));
FAX1 U20553 (.A(S_9_9), .B(C_9_8), .C((A[10] & B[8])), .YS(S_10_8), .YC(C_10_8));
FAX1 U20554 (.A(S_9_10), .B(C_9_9), .C((A[10] & B[9])), .YS(S_10_9), .YC(C_10_9));
FAX1 U20555 (.A(S_9_11), .B(C_9_10), .C((A[10] & B[10])), .YS(S_10_10), .YC(C_10_10));
HAX1 U20556 (.A(C_9_11), .B(~(A[10] & B[11])), .YS(S_10_11), .YC(C_10_11));
FAX1 U20557 (.A(S_10_1), .B(C_10_0), .C(~(A[11] & B[0])), .YS(S_11_0), .YC(C_11_0));
FAX1 U20558 (.A(S_10_2), .B(C_10_1), .C(~(A[11] & B[1])), .YS(S_11_1), .YC(C_11_1));
FAX1 U20559 (.A(S_10_3), .B(C_10_2), .C(~(A[11] & B[2])), .YS(S_11_2), .YC(C_11_2));
FAX1 U20560 (.A(S_10_4), .B(C_10_3), .C(~(A[11] & B[3])), .YS(S_11_3), .YC(C_11_3));
FAX1 U20561 (.A(S_10_5), .B(C_10_4), .C(~(A[11] & B[4])), .YS(S_11_4), .YC(C_11_4));
FAX1 U20562 (.A(S_10_6), .B(C_10_5), .C(~(A[11] & B[5])), .YS(S_11_5), .YC(C_11_5));
FAX1 U20563 (.A(S_10_7), .B(C_10_6), .C(~(A[11] & B[6])), .YS(S_11_6), .YC(C_11_6));
FAX1 U20564 (.A(S_10_8), .B(C_10_7), .C(~(A[11] & B[7])), .YS(S_11_7), .YC(C_11_7));
FAX1 U20565 (.A(S_10_9), .B(C_10_8), .C(~(A[11] & B[8])), .YS(S_11_8), .YC(C_11_8));
FAX1 U20566 (.A(S_10_10), .B(C_10_9), .C(~(A[11] & B[9])), .YS(S_11_9), .YC(C_11_9));
FAX1 U20567 (.A(S_10_11), .B(C_10_10), .C(~(A[11] & B[10])), .YS(S_11_10), .YC(C_11_10));
HAX1 U20568 (.A(C_10_11), .B((A[11] & B[11])), .YS(S_11_11), .YC(C_11_11));
HAX1 U20569 (.A(S_11_1), .B(C_11_0), .YS(S_12_0), .YC(C_12_0));
FAX1 U20570 (.A(S_11_2), .B(C_12_0), .C(C_11_1), .YS(S_12_1), .YC(C_12_1));
FAX1 U20571 (.A(S_11_3), .B(C_12_1), .C(C_11_2), .YS(S_12_2), .YC(C_12_2));
FAX1 U20572 (.A(S_11_4), .B(C_12_2), .C(C_11_3), .YS(S_12_3), .YC(C_12_3));
FAX1 U20573 (.A(S_11_5), .B(C_12_3), .C(C_11_4), .YS(S_12_4), .YC(C_12_4));
FAX1 U20574 (.A(S_11_6), .B(C_12_4), .C(C_11_5), .YS(S_12_5), .YC(C_12_5));
FAX1 U20575 (.A(S_11_7), .B(C_12_5), .C(C_11_6), .YS(S_12_6), .YC(C_12_6));
FAX1 U20576 (.A(S_11_8), .B(C_12_6), .C(C_11_7), .YS(S_12_7), .YC(C_12_7));
FAX1 U20577 (.A(S_11_9), .B(C_12_7), .C(C_11_8), .YS(S_12_8), .YC(C_12_8));
FAX1 U20578 (.A(S_11_10), .B(C_12_8), .C(C_11_9), .YS(S_12_9), .YC(C_12_9));
FAX1 U20579 (.A(S_11_11), .B(C_12_9), .C(C_11_10), .YS(S_12_10), .YC(C_12_10));
FAX1 U20580 (.A(1'b1), .B(C_12_10), .C(C_11_11), .YS(S_12_11), .YC(C_12_11));
assign O = {S_12_11,S_12_10,S_12_9,S_12_8,S_12_7,S_12_6,S_12_5,S_12_4,S_12_3,S_12_2,S_12_1,S_12_0,S_11_0,S_10_0,S_9_0,S_8_0,S_7_0,S_6_0,S_5_0,S_4_0,S_3_0,S_2_0,S_1_0,1'b0};
endmodule