/*** * 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 add8_430 /// Library = EvoApprox8b /// Circuit = add8_430 /// Area (180) = 1376 /// Delay (180) = 1.260 /// Power (180) = 439.10 /// Area (45) = 97 /// Delay (45) = 0.530 /// Power (45) = 36.04 /// Nodes = 31 /// HD = 134528 /// MAE = 1.59375 /// MSE = 4.00000 /// MRE = 0.86 % /// WCE = 5 /// WCRE = 200 % /// EP = 81.2 % uint16_t add8_430(uint8_t a, uint8_t b) { uint16_t c = 0; 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 n32; uint8_t n35; uint8_t n36; uint8_t n39; uint8_t n49; uint8_t n50; uint8_t n58; uint8_t n59; uint8_t n68; uint8_t n69; uint8_t n78; uint8_t n79; uint8_t n84; uint8_t n85; uint8_t n86; uint8_t n87; uint8_t n89; uint8_t n96; uint8_t n97; uint8_t n127; uint8_t n134; uint8_t n145; uint8_t n152; uint8_t n162; uint8_t n170; uint8_t n181; uint8_t n198; uint8_t n199; uint8_t n226; uint8_t n240; uint8_t n244; uint8_t n254; uint8_t n272; uint8_t n391; uint8_t n394; uint8_t n404; uint8_t n412; uint8_t n413; uint8_t n423; n32 = n4 & n18; n35 = ~(n20 & n32); n36 = n16 ^ n16; n39 = ~n35; n49 = n39; n50 = n4 | n20; n58 = (n6 ^ n22) ^ n49; n59 = (n6 & n22) | (n22 & n49) | (n6 & n49); n68 = n8 ^ n24; n69 = n8 & n24; n78 = n10 ^ n26; n79 = n10 & n26; n84 = n59; n85 = n59; n86 = n12 ^ n28; n87 = n12 & n28; n89 = n24 | n8; n96 = n14 ^ n30; n97 = n14 & n30; n127 = n69; n134 = n89 & n85; n145 = ~n36; n152 = n127 | n134; n162 = n86 & n79; n170 = n86 & n78; n181 = n87 | n162; n198 = n152; n199 = n152; n226 = n78 & n199; n240 = ~n84; n244 = n79 | n226; n254 = n170 & n198; n272 = n181 | n254; n391 = ~(n240 ^ n68); n394 = n78 ^ n199; n404 = n86 ^ n244; n412 = n96 ^ n272; n413 = n96 & n272; n423 = n97 | n413; c |= (n2 & 0x1) << 0; c |= (n145 & 0x1) << 1; c |= (n50 & 0x1) << 2; c |= (n58 & 0x1) << 3; c |= (n391 & 0x1) << 4; c |= (n394 & 0x1) << 5; c |= (n404 & 0x1) << 6; c |= (n412 & 0x1) << 7; c |= (n423 & 0x1) << 8; return c; }