/*** * 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_078 /// Library = EvoApprox8b /// Circuit = add8_078 /// Area (180) = 756 /// Delay (180) = 1.320 /// Power (180) = 177.10 /// Area (45) = 56 /// Delay (45) = 0.480 /// Power (45) = 17.48 /// Nodes = 12 /// HD = 180480 /// MAE = 3.45312 /// MSE = 22.50000 /// MRE = 1.76 % /// WCE = 15 /// WCRE = 300 % /// EP = 85.9 % uint16_t add8_078(uint8_t a, uint8_t b) { uint16_t c = 0; 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 n39; uint8_t n40; uint8_t n52; uint8_t n126; uint8_t n127; uint8_t n132; uint8_t n183; 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 = ~(n4 & n20 & n6); n39 = ~(n33 | n30); n40 = n20 ^ n20; n52 = n22 & n39; n126 = ~n40; n127 = ~n40; n132 = n4 | n20; n183 = n6 | n22; n213 = n52; 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 |= (n126 & 0x1) << 1; c |= (n132 & 0x1) << 2; c |= (n183 & 0x1) << 3; c |= (n232 & 0x1) << 4; c |= (n282 & 0x1) << 5; c |= (n332 & 0x1) << 6; c |= (n382 & 0x1) << 7; c |= (n383 & 0x1) << 8; return c; }