/*** * 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_274 /// Library = EvoApprox8b /// Circuit = add8_274 /// Area (180) = 808 /// Delay (180) = 1.390 /// Power (180) = 176.40 /// Area (45) = 61 /// Delay (45) = 0.500 /// Power (45) = 17.38 /// Nodes = 14 /// HD = 182464 /// MAE = 3.53125 /// MSE = 23.75000 /// MRE = 1.84 % /// WCE = 14 /// WCRE = 300 % /// EP = 85.9 % uint16_t add8_274(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 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 n36; uint8_t n39; uint8_t n40; uint8_t n75; uint8_t n114; uint8_t n127; uint8_t n132; uint8_t n182; uint8_t n213; uint8_t n232; uint8_t n233; uint8_t n282; uint8_t n283; uint8_t n332; uint8_t n333; uint8_t n382; uint8_t n383; n33 = ~(n22 & n20 & n4); n36 = ~(n0 & n2 & n6); n39 = ~(n33 | n36); n40 = n20 ^ n20; n75 = n39; n114 = n75; n127 = ~n40; n132 = n4 | n20; n182 = n6 | n22; n213 = n114; n232 = (n8 ^ n24) ^ n213; n233 = (n8 & n24) | (n24 & n213) | (n8 & n213); n282 = (n10 ^ n26) ^ n233; n283 = (n10 & n26) | (n26 & n233) | (n10 & n233); n332 = (n12 ^ n28) ^ n283; n333 = (n12 & n28) | (n28 & n283) | (n12 & n283); n382 = (n14 ^ n30) ^ n333; n383 = (n14 & n30) | (n30 & n333) | (n14 & n333); c |= (n127 & 0x1) << 0; c |= (n127 & 0x1) << 1; c |= (n132 & 0x1) << 2; c |= (n182 & 0x1) << 3; c |= (n232 & 0x1) << 4; c |= (n282 & 0x1) << 5; c |= (n332 & 0x1) << 6; c |= (n382 & 0x1) << 7; c |= (n383 & 0x1) << 8; return c; }