/*** * 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, R. Hrbacek, Z. Vasicek and L. Sekanina, "EvoApprox8b: Library of approximate adders and multipliers for circuit design and benchmarking of approximation methods". Design, Automation & Test in Europe Conference & Exhibition (DATE), 2017, Lausanne, 2017, pp. 258-261. doi: 10.23919/DATE.2017.7926993 * This file contains a circuit from evoapprox8b dataset. Note that a new version of library was already published. ***/ #include #include /// Approximate function mul8_245 /// Library = EvoApprox8b /// Circuit = mul8_245 /// Area (180) = 6084 /// Delay (180) = 4.010 /// Power (180) = 2824.40 /// Area (45) = 440 /// Delay (45) = 1.500 /// Power (45) = 244.60 /// Nodes = 99 /// HD = 290834 /// MAE = 103.81757 /// MSE = 18839.29297 /// MRE = 3.21 % /// WCE = 670 /// WCRE = 156 % /// EP = 97.5 % uint16_t mul8_245(uint8_t a, uint8_t b) { uint16_t c = 0; uint8_t n0 = (a >> 0) & 0x1; uint8_t n2 = (a >> 1) & 0x1; uint8_t n4 = (a >> 2) & 0x1; uint8_t n6 = (a >> 3) & 0x1; uint8_t n8 = (a >> 4) & 0x1; uint8_t n10 = (a >> 5) & 0x1; uint8_t n12 = (a >> 6) & 0x1; uint8_t n14 = (a >> 7) & 0x1; uint8_t n16 = (b >> 0) & 0x1; uint8_t n18 = (b >> 1) & 0x1; uint8_t n20 = (b >> 2) & 0x1; uint8_t n22 = (b >> 3) & 0x1; uint8_t n24 = (b >> 4) & 0x1; uint8_t n26 = (b >> 5) & 0x1; uint8_t n28 = (b >> 6) & 0x1; uint8_t n30 = (b >> 7) & 0x1; uint8_t n33; uint8_t n37; uint8_t n41; uint8_t n49; uint8_t n54; uint8_t n65; uint8_t n83; uint8_t n86; uint8_t n89; uint8_t n93; uint8_t n97; uint8_t n148; uint8_t n161; uint8_t n197; uint8_t n264; uint8_t n275; uint8_t n282; uint8_t n398; uint8_t n405; uint8_t n414; uint8_t n415; uint8_t n425; uint8_t n498; uint8_t n514; uint8_t n532; uint8_t n548; uint8_t n632; uint8_t n633; uint8_t n648; uint8_t n664; uint8_t n665; uint8_t n682; uint8_t n683; uint8_t n749; uint8_t n764; uint8_t n782; uint8_t n798; uint8_t n814; uint8_t n882; uint8_t n898; uint8_t n899; uint8_t n914; uint8_t n915; uint8_t n932; uint8_t n933; uint8_t n948; uint8_t n949; uint8_t n998; uint8_t n1014; uint8_t n1032; uint8_t n1048; uint8_t n1064; uint8_t n1082; uint8_t n1114; uint8_t n1132; uint8_t n1133; uint8_t n1148; uint8_t n1149; uint8_t n1164; uint8_t n1165; uint8_t n1182; uint8_t n1183; uint8_t n1198; uint8_t n1199; uint8_t n1214; uint8_t n1215; uint8_t n1232; uint8_t n1248; uint8_t n1264; uint8_t n1282; uint8_t n1298; uint8_t n1314; uint8_t n1332; uint8_t n1348; uint8_t n1364; uint8_t n1382; uint8_t n1398; uint8_t n1399; uint8_t n1414; uint8_t n1415; uint8_t n1432; uint8_t n1433; uint8_t n1448; uint8_t n1449; uint8_t n1464; uint8_t n1465; uint8_t n1482; uint8_t n1483; uint8_t n1514; uint8_t n1532; uint8_t n1548; uint8_t n1564; uint8_t n1582; uint8_t n1598; uint8_t n1614; uint8_t n1632; uint8_t n1648; uint8_t n1649; uint8_t n1664; uint8_t n1665; uint8_t n1682; uint8_t n1683; uint8_t n1698; uint8_t n1699; uint8_t n1714; uint8_t n1715; uint8_t n1732; uint8_t n1733; uint8_t n1748; uint8_t n1749; uint8_t n1764; uint8_t n1782; uint8_t n1798; uint8_t n1814; uint8_t n1832; uint8_t n1848; uint8_t n1864; uint8_t n1882; uint8_t n1898; uint8_t n1899; uint8_t n1914; uint8_t n1915; uint8_t n1932; uint8_t n1933; uint8_t n1948; uint8_t n1949; uint8_t n1964; uint8_t n1965; uint8_t n1982; uint8_t n1983; uint8_t n1998; uint8_t n1999; uint8_t n2014; uint8_t n2015; n33 = ~(n18 & n14); n37 = ~(n33 | n22 | n14); n41 = n2 & n28; n49 = ~(n41 & n14 & n0); n54 = ~n49; n65 = (n6 & n12) | (~n6 & n28); n83 = n18 & n37; n86 = ~(n65 | n28); n89 = ~(n86 ^ n28); n93 = n49; n97 = ~(n18 & n12); n148 = n14 & n16; n161 = n89 & n54; n197 = n97; n264 = ~n12; n275 = ~n197; n282 = n14 & n18; n398 = (n161 & n264) | (~n161 & n148); n405 = n93; n414 = n275 ^ n282; n415 = n275 & n282; n425 = n41 | n398; n498 = n8 & n20; n514 = n10 & n20; n532 = n12 & n20; n548 = n14 & n20; n632 = n425 | n498; n633 = n425 | n498; n648 = n398 | n514; n664 = n414 ^ n532; n665 = n414 & n532; n682 = (n415 ^ n548) ^ n665; n683 = (n415 & n548) | (n548 & n665) | (n415 & n665); n749 = n6 & n22; n764 = n8 & n22; n782 = n10 & n22; n798 = n12 & n22; n814 = n14 & n22; n882 = n632; n898 = n648 ^ n764; n899 = n648 & n764; n914 = (n664 ^ n782) ^ n899; n915 = (n664 & n782) | (n782 & n899) | (n664 & n899); n932 = (n682 ^ n798) ^ n915; n933 = (n682 & n798) | (n798 & n915) | (n682 & n915); n948 = (n683 ^ n814) ^ n933; n949 = (n683 & n814) | (n814 & n933) | (n683 & n933); n998 = n4 & n24; n1014 = n6 & n24; n1032 = n8 & n24; n1048 = n10 & n24; n1064 = n12 & n24; n1082 = n14 & n24; n1114 = ~(n405 ^ n764); n1132 = n882 ^ n998; n1133 = n882 & n998; n1148 = (n898 ^ n1014) ^ n1133; n1149 = (n898 & n1014) | (n1014 & n1133) | (n898 & n1133); n1164 = (n914 ^ n1032) ^ n1149; n1165 = (n914 & n1032) | (n1032 & n1149) | (n914 & n1149); n1182 = (n932 ^ n1048) ^ n1165; n1183 = (n932 & n1048) | (n1048 & n1165) | (n932 & n1165); n1198 = (n948 ^ n1064) ^ n1183; n1199 = (n948 & n1064) | (n1064 & n1183) | (n948 & n1183); n1214 = (n949 ^ n1082) ^ n1199; n1215 = (n949 & n1082) | (n1082 & n1199) | (n949 & n1199); n1232 = n0 & n26; n1248 = n2 & n26; n1264 = n4 & n26; n1282 = n6 & n26; n1298 = n8 & n26; n1314 = n10 & n26; n1332 = n12 & n26; n1348 = n14 & n26; n1364 = n1114 ^ n1232; n1382 = n1132 ^ n1248; n1398 = n1148 ^ n1264; n1399 = n1148 & n1264; n1414 = (n1164 ^ n1282) ^ n1399; n1415 = (n1164 & n1282) | (n1282 & n1399) | (n1164 & n1399); n1432 = (n1182 ^ n1298) ^ n1415; n1433 = (n1182 & n1298) | (n1298 & n1415) | (n1182 & n1415); n1448 = (n1198 ^ n1314) ^ n1433; n1449 = (n1198 & n1314) | (n1314 & n1433) | (n1198 & n1433); n1464 = (n1214 ^ n1332) ^ n1449; n1465 = (n1214 & n1332) | (n1332 & n1449) | (n1214 & n1449); n1482 = (n1215 ^ n1348) ^ n1465; n1483 = (n1215 & n1348) | (n1348 & n1465) | (n1215 & n1465); n1514 = n2 & n28; n1532 = n4 & n28; n1548 = n6 & n28; n1564 = n8 & n28; n1582 = n10 & n28; n1598 = n12 & n28; n1614 = n14 & n28; n1632 = n1382 | n1414; n1648 = n1398 ^ n1514; n1649 = n1398 & n1514; n1664 = (n1414 ^ n1532) ^ n1649; n1665 = (n1414 & n1532) | (n1532 & n1649) | (n1414 & n1649); n1682 = (n1432 ^ n1548) ^ n1665; n1683 = (n1432 & n1548) | (n1548 & n1665) | (n1432 & n1665); n1698 = (n1448 ^ n1564) ^ n1683; n1699 = (n1448 & n1564) | (n1564 & n1683) | (n1448 & n1683); n1714 = (n1464 ^ n1582) ^ n1699; n1715 = (n1464 & n1582) | (n1582 & n1699) | (n1464 & n1699); n1732 = (n1482 ^ n1598) ^ n1715; n1733 = (n1482 & n1598) | (n1598 & n1715) | (n1482 & n1715); n1748 = (n1483 ^ n1614) ^ n1733; n1749 = (n1483 & n1614) | (n1614 & n1733) | (n1483 & n1733); n1764 = n0 & n30; n1782 = n2 & n30; n1798 = n4 & n30; n1814 = n6 & n30; n1832 = n8 & n30; n1848 = n10 & n30; n1864 = n12 & n30; n1882 = n14 & n30; n1898 = n1648 ^ n1764; n1899 = n1648 & n1764; n1914 = (n1664 ^ n1782) ^ n1899; n1915 = (n1664 & n1782) | (n1782 & n1899) | (n1664 & n1899); n1932 = (n1682 ^ n1798) ^ n1915; n1933 = (n1682 & n1798) | (n1798 & n1915) | (n1682 & n1915); n1948 = (n1698 ^ n1814) ^ n1933; n1949 = (n1698 & n1814) | (n1814 & n1933) | (n1698 & n1933); n1964 = (n1714 ^ n1832) ^ n1949; n1965 = (n1714 & n1832) | (n1832 & n1949) | (n1714 & n1949); n1982 = (n1732 ^ n1848) ^ n1965; n1983 = (n1732 & n1848) | (n1848 & n1965) | (n1732 & n1965); n1998 = (n1748 ^ n1864) ^ n1983; n1999 = (n1748 & n1864) | (n1864 & n1983) | (n1748 & n1983); n2014 = (n1749 ^ n1882) ^ n1999; n2015 = (n1749 & n1882) | (n1882 & n1999) | (n1749 & n1999); c |= (n633 & 0x1) << 0; c |= (n54 & 0x1) << 1; c |= (n83 & 0x1) << 2; c |= (n1632 & 0x1) << 3; c |= (n749 & 0x1) << 4; c |= (n1364 & 0x1) << 5; c |= (n1632 & 0x1) << 6; c |= (n1898 & 0x1) << 7; c |= (n1914 & 0x1) << 8; c |= (n1932 & 0x1) << 9; c |= (n1948 & 0x1) << 10; c |= (n1964 & 0x1) << 11; c |= (n1982 & 0x1) << 12; c |= (n1998 & 0x1) << 13; c |= (n2014 & 0x1) << 14; c |= (n2015 & 0x1) << 15; return c; }