/*** * 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_CarryLookaheadAdder /// Library = EvoApprox8b /// Circuit = add8_CLA /// Area (180) = 3080 /// Delay (180) = 1.190 /// Power (180) = 1004.30 /// Area (45) = 221 /// Delay (45) = 0.440 /// Power (45) = 80.84 /// Nodes = 79 /// HD = 0 /// MAE = 0.00000 /// MSE = 0.00000 /// MRE = 0.00 % /// WCE = 0 /// WCRE = 0 % /// EP = 0.0 % uint16_t add8_CarryLookaheadAdder(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 n32; uint8_t n33; uint8_t n34; uint8_t n35; uint8_t n36; uint8_t n37; uint8_t n38; uint8_t n39; uint8_t n40; uint8_t n41; uint8_t n42; uint8_t n43; uint8_t n44; uint8_t n45; uint8_t n46; uint8_t n47; uint8_t n48; uint8_t n50; uint8_t n54; uint8_t n56; uint8_t n58; uint8_t n60; uint8_t n62; uint8_t n64; uint8_t n66; uint8_t n68; uint8_t n70; uint8_t n72; uint8_t n74; uint8_t n76; uint8_t n78; uint8_t n80; uint8_t n82; uint8_t n84; uint8_t n86; uint8_t n88; uint8_t n90; uint8_t n92; uint8_t n96; uint8_t n98; uint8_t n100; uint8_t n102; uint8_t n104; uint8_t n106; uint8_t n108; uint8_t n110; uint8_t n112; uint8_t n114; uint8_t n116; uint8_t n118; uint8_t n122; uint8_t n124; uint8_t n126; uint8_t n128; uint8_t n130; uint8_t n132; uint8_t n134; uint8_t n136; uint8_t n138; uint8_t n140; uint8_t n142; uint8_t n144; uint8_t n146; uint8_t n148; uint8_t n150; uint8_t n152; uint8_t n154; uint8_t n156; uint8_t n158; uint8_t n160; uint8_t n162; uint8_t n164; uint8_t n166; uint8_t n168; uint8_t n170; uint8_t n172; uint8_t n174; uint8_t n176; uint8_t n178; uint8_t n180; uint8_t n182; uint8_t n184; uint8_t n186; uint8_t n188; uint8_t n190; uint8_t n192; uint8_t n194; n32 = n0 ^ n16; n33 = n0 & n16; n34 = n2 ^ n18; n35 = n2 & n18; n36 = n4 ^ n20; n37 = n4 & n20; n38 = n6 ^ n22; n39 = n6 & n22; n40 = n8 ^ n24; n41 = n8 & n24; n42 = n10 ^ n26; n43 = n10 & n26; n44 = n12 ^ n28; n45 = n12 & n28; n46 = n14 ^ n30; n47 = n14 & n30; n48 = n34 & n33; n50 = n35 | n48; n54 = n36 & n48; n56 = n36 & n35; n58 = n37 | n56; n60 = n58 | n54; n62 = n38 & n36; n64 = n62 & n48; n66 = n38 & n56; n68 = n38 & n37; n70 = n39 | n68; n72 = n66 | n64; n74 = n70 | n72; n76 = n40 & n38; n78 = n40 & n64; n80 = n76 & n56; n82 = n40 & n68; n84 = n40 & n39; n86 = n41 | n84; n88 = n82 | n80; n90 = n86 | n88; n92 = n90 | n78; n96 = n42 & n40; n98 = n96 & n64; n100 = n42 & n80; n102 = n96 & n68; n104 = n42 & n84; n106 = n42 & n41; n108 = n43 | n106; n110 = n104 | n102; n112 = n100 | n98; n114 = n108 | n110; n116 = n114 | n112; n118 = n44 & n42; n122 = n44 & n96; n124 = n122 & n64; n126 = n118 & n80; n128 = n44 & n102; n130 = n118 & n84; n132 = n44 & n106; n134 = n44 & n43; n136 = n45 | n134; n138 = n132 | n130; n140 = n128 | n126; n142 = n136 | n138; n144 = n140 | n124; n146 = n142 | n144; n148 = n46 & n44; n150 = n148 & n96; n152 = n150 & n64; n154 = n46 & n118; n156 = n154 & n80; n158 = n148 & n102; n160 = n46 & n130; n162 = n148 & n106; n164 = n46 & n134; n166 = n46 & n45; n168 = n47 | n166; n170 = n164 | n162; n172 = n160 | n158; n174 = n156 | n152; n176 = n168 | n170; n178 = n172 | n174; n180 = n176 | n178; n182 = n34 ^ n33; n184 = n36 ^ n50; n186 = n38 ^ n60; n188 = n40 ^ n74; n190 = n42 ^ n92; n192 = n44 ^ n116; n194 = n46 ^ n146; c |= (n32 & 0x1) << 0; c |= (n182 & 0x1) << 1; c |= (n184 & 0x1) << 2; c |= (n186 & 0x1) << 3; c |= (n188 & 0x1) << 4; c |= (n190 & 0x1) << 5; c |= (n192 & 0x1) << 6; c |= (n194 & 0x1) << 7; c |= (n180 & 0x1) << 8; return c; }