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 wce parameters
***/
// MAE% = 0.48 %
// MAE = 79872 
// WCE% = 1.90 %
// WCE = 319489 
// WCRE% = 100.00 %
// EP% = 99.94 %
// MRE% = 7.43 %
// MSE = 78073.148e5 
// PDK45_PWR = 0.237 mW
// PDK45_AREA = 461.3 um2
// PDK45_DELAY = 1.48 ns
#include <stdint.h>
#include <stdlib.h>

uint32_t mul12u_2C5(uint16_t A, uint16_t B)
{
  uint32_t P, P_;
  uint16_t tmp, C_10_10,C_10_5,C_10_6,C_10_7,C_10_8,C_10_9,C_11_10,C_11_4,C_11_5,C_11_6,C_11_7,C_11_8,C_11_9,C_12_10,C_12_4,C_12_5,C_12_6,C_12_7,C_12_8,C_12_9,C_5_10,C_6_10,C_6_9,C_7_10,C_7_8,C_7_9,C_8_10,C_8_7,C_8_8,C_8_9,C_9_10,C_9_6,C_9_7,C_9_8,C_9_9,S_10_10,S_10_11,S_10_5,S_10_6,S_10_7,S_10_8,S_10_9,S_11_10,S_11_11,S_11_4,S_11_5,S_11_6,S_11_7,S_11_8,S_11_9,S_12_10,S_12_11,S_12_3,S_12_4,S_12_5,S_12_6,S_12_7,S_12_8,S_12_9,S_4_11,S_5_10,S_5_11,S_6_10,S_6_11,S_6_9,S_7_10,S_7_11,S_7_8,S_7_9,S_8_10,S_8_11,S_8_7,S_8_8,S_8_9,S_9_10,S_9_11,S_9_6,S_9_7,S_9_8,S_9_9;
  S_4_11 = (((A>>4)&1) & ((B>>11)&1));
  S_5_10 = S_4_11^(((A>>5)&1) & ((B>>10)&1));
  C_5_10 = S_4_11&(((A>>5)&1) & ((B>>10)&1));
  S_5_11 = (((A>>5)&1) & ((B>>11)&1));
  S_6_9 = S_5_10^(((A>>6)&1) & ((B>>9)&1));
  C_6_9 = S_5_10&(((A>>6)&1) & ((B>>9)&1));
  tmp = S_5_11^C_5_10;
  S_6_10 = tmp^(((A>>6)&1) & ((B>>10)&1));
  C_6_10 = (tmp&(((A>>6)&1) & ((B>>10)&1)))|(S_5_11&C_5_10);
  S_6_11 = (((A>>6)&1) & ((B>>11)&1));
  S_7_8 = S_6_9^(((A>>7)&1) & ((B>>8)&1));
  C_7_8 = S_6_9&(((A>>7)&1) & ((B>>8)&1));
  tmp = S_6_10^C_6_9;
  S_7_9 = tmp^(((A>>7)&1) & ((B>>9)&1));
  C_7_9 = (tmp&(((A>>7)&1) & ((B>>9)&1)))|(S_6_10&C_6_9);
  tmp = S_6_11^C_6_10;
  S_7_10 = tmp^(((A>>7)&1) & ((B>>10)&1));
  C_7_10 = (tmp&(((A>>7)&1) & ((B>>10)&1)))|(S_6_11&C_6_10);
  S_7_11 = (((A>>7)&1) & ((B>>11)&1));
  S_8_7 = S_7_8^(((A>>8)&1) & ((B>>7)&1));
  C_8_7 = S_7_8&(((A>>8)&1) & ((B>>7)&1));
  tmp = S_7_9^C_7_8;
  S_8_8 = tmp^(((A>>8)&1) & ((B>>8)&1));
  C_8_8 = (tmp&(((A>>8)&1) & ((B>>8)&1)))|(S_7_9&C_7_8);
  tmp = S_7_10^C_7_9;
  S_8_9 = tmp^(((A>>8)&1) & ((B>>9)&1));
  C_8_9 = (tmp&(((A>>8)&1) & ((B>>9)&1)))|(S_7_10&C_7_9);
  tmp = S_7_11^C_7_10;
  S_8_10 = tmp^(((A>>8)&1) & ((B>>10)&1));
  C_8_10 = (tmp&(((A>>8)&1) & ((B>>10)&1)))|(S_7_11&C_7_10);
  S_8_11 = (((A>>8)&1) & ((B>>11)&1));
  S_9_6 = S_8_7^(((A>>9)&1) & ((B>>6)&1));
  C_9_6 = S_8_7&(((A>>9)&1) & ((B>>6)&1));
  tmp = S_8_8^C_8_7;
  S_9_7 = tmp^(((A>>9)&1) & ((B>>7)&1));
  C_9_7 = (tmp&(((A>>9)&1) & ((B>>7)&1)))|(S_8_8&C_8_7);
  tmp = S_8_9^C_8_8;
  S_9_8 = tmp^(((A>>9)&1) & ((B>>8)&1));
  C_9_8 = (tmp&(((A>>9)&1) & ((B>>8)&1)))|(S_8_9&C_8_8);
  tmp = S_8_10^C_8_9;
  S_9_9 = tmp^(((A>>9)&1) & ((B>>9)&1));
  C_9_9 = (tmp&(((A>>9)&1) & ((B>>9)&1)))|(S_8_10&C_8_9);
  tmp = S_8_11^C_8_10;
  S_9_10 = tmp^(((A>>9)&1) & ((B>>10)&1));
  C_9_10 = (tmp&(((A>>9)&1) & ((B>>10)&1)))|(S_8_11&C_8_10);
  S_9_11 = (((A>>9)&1) & ((B>>11)&1));
  S_10_5 = S_9_6^(((A>>10)&1) & ((B>>5)&1));
  C_10_5 = S_9_6&(((A>>10)&1) & ((B>>5)&1));
  tmp = S_9_7^C_9_6;
  S_10_6 = tmp^(((A>>10)&1) & ((B>>6)&1));
  C_10_6 = (tmp&(((A>>10)&1) & ((B>>6)&1)))|(S_9_7&C_9_6);
  tmp = S_9_8^C_9_7;
  S_10_7 = tmp^(((A>>10)&1) & ((B>>7)&1));
  C_10_7 = (tmp&(((A>>10)&1) & ((B>>7)&1)))|(S_9_8&C_9_7);
  tmp = S_9_9^C_9_8;
  S_10_8 = tmp^(((A>>10)&1) & ((B>>8)&1));
  C_10_8 = (tmp&(((A>>10)&1) & ((B>>8)&1)))|(S_9_9&C_9_8);
  tmp = S_9_10^C_9_9;
  S_10_9 = tmp^(((A>>10)&1) & ((B>>9)&1));
  C_10_9 = (tmp&(((A>>10)&1) & ((B>>9)&1)))|(S_9_10&C_9_9);
  tmp = S_9_11^C_9_10;
  S_10_10 = tmp^(((A>>10)&1) & ((B>>10)&1));
  C_10_10 = (tmp&(((A>>10)&1) & ((B>>10)&1)))|(S_9_11&C_9_10);
  S_10_11 = (((A>>10)&1) & ((B>>11)&1));
  S_11_4 = S_10_5^(((A>>11)&1) & ((B>>4)&1));
  C_11_4 = S_10_5&(((A>>11)&1) & ((B>>4)&1));
  tmp = S_10_6^C_10_5;
  S_11_5 = tmp^(((A>>11)&1) & ((B>>5)&1));
  C_11_5 = (tmp&(((A>>11)&1) & ((B>>5)&1)))|(S_10_6&C_10_5);
  tmp = S_10_7^C_10_6;
  S_11_6 = tmp^(((A>>11)&1) & ((B>>6)&1));
  C_11_6 = (tmp&(((A>>11)&1) & ((B>>6)&1)))|(S_10_7&C_10_6);
  tmp = S_10_8^C_10_7;
  S_11_7 = tmp^(((A>>11)&1) & ((B>>7)&1));
  C_11_7 = (tmp&(((A>>11)&1) & ((B>>7)&1)))|(S_10_8&C_10_7);
  tmp = S_10_9^C_10_8;
  S_11_8 = tmp^(((A>>11)&1) & ((B>>8)&1));
  C_11_8 = (tmp&(((A>>11)&1) & ((B>>8)&1)))|(S_10_9&C_10_8);
  tmp = S_10_10^C_10_9;
  S_11_9 = tmp^(((A>>11)&1) & ((B>>9)&1));
  C_11_9 = (tmp&(((A>>11)&1) & ((B>>9)&1)))|(S_10_10&C_10_9);
  tmp = S_10_11^C_10_10;
  S_11_10 = tmp^(((A>>11)&1) & ((B>>10)&1));
  C_11_10 = (tmp&(((A>>11)&1) & ((B>>10)&1)))|(S_10_11&C_10_10);
  S_11_11 = (((A>>11)&1) & ((B>>11)&1));
  S_12_3 = S_11_4;
  S_12_4 = S_11_5^C_11_4;
  C_12_4 = S_11_5&C_11_4;
  tmp = S_11_6^C_12_4;
  S_12_5 = tmp^C_11_5;
  C_12_5 = (tmp&C_11_5)|(S_11_6&C_12_4);
  tmp = S_11_7^C_12_5;
  S_12_6 = tmp^C_11_6;
  C_12_6 = (tmp&C_11_6)|(S_11_7&C_12_5);
  tmp = S_11_8^C_12_6;
  S_12_7 = tmp^C_11_7;
  C_12_7 = (tmp&C_11_7)|(S_11_8&C_12_6);
  tmp = S_11_9^C_12_7;
  S_12_8 = tmp^C_11_8;
  C_12_8 = (tmp&C_11_8)|(S_11_9&C_12_7);
  tmp = S_11_10^C_12_8;
  S_12_9 = tmp^C_11_9;
  C_12_9 = (tmp&C_11_9)|(S_11_10&C_12_8);
  tmp = S_11_11^C_12_9;
  S_12_10 = tmp^C_11_10;
  C_12_10 = (tmp&C_11_10)|(S_11_11&C_12_9);
  S_12_11 = C_12_10;
  P = 0;
  P |= (S_12_3 & 1) << 15;
  P |= (S_12_4 & 1) << 16;
  P |= (S_12_5 & 1) << 17;
  P |= (S_12_6 & 1) << 18;
  P |= (S_12_7 & 1) << 19;
  P |= (S_12_8 & 1) << 20;
  P |= (S_12_9 & 1) << 21;
  P |= (S_12_10 & 1) << 22;
  P |= (S_12_11 & 1) << 23;
  return P;
}