/*** * 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, L. Sekanina, Z. Vasicek "Libraries of Approximate Circuits: Automated Design and Application in CNN Accelerators" IEEE Journal on Emerging and Selected Topics in Circuits and Systems, Vol 10, No 4, 2020 * This file contains a circuit from a sub-set of pareto optimal circuits with respect to the pwr and mae parameters ***/ // MAE% = 25.47 % // MAE = 33 // WCE% = 72.66 % // WCE = 93 // WCRE% = 5600.00 % // EP% = 99.11 % // MRE% = 161.98 % // MSE = 1507 // PDK45_PWR = 0.0054 mW // PDK45_AREA = 21.6 um2 // PDK45_DELAY = 0.17 ns #include #include uint64_t add8s_7GP(const uint64_t A /* 8-bit signed operand */, const uint64_t B /* 8-bit signed operand */) { uint64_t dout_20, dout_28, dout_30, dout_33, dout_40, dout_57, dout_60; uint64_t O; dout_20=(((B >> 6)&1)^((A >> 6)&1))^0xFFFFFFFFFFFFFFFFU; dout_28=((A >> 6)&1)&((B >> 6)&1); dout_30=((A >> 7)&1)^((B >> 7)&1); dout_33=((B >> 7)&1)&((A >> 7)&1); dout_40=(dout_33|dout_20)^0xFFFFFFFFFFFFFFFFU; dout_57=dout_28|dout_33; dout_60=dout_57^dout_30; O = 0; O |= (dout_40&1) << 0; O |= (((A >> 0)&1)&1) << 1; O |= (0&1) << 2; O |= (dout_40&1) << 3; O |= (((A >> 0)&1)&1) << 4; O |= (((A >> 5)&1)&1) << 5; O |= (dout_40&1) << 6; O |= (dout_60&1) << 7; return O; }