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add8_239.c
89 lines (84 loc) · 2.48 KB
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add8_239.c
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/***
* 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 <stdint.h>
#include <stdlib.h>
/// Approximate function add8_239
/// Library = EvoApprox8b
/// Circuit = add8_239
/// Area (180) = 740
/// Delay (180) = 1.370
/// Power (180) = 168.60
/// Area (45) = 54
/// Delay (45) = 0.520
/// Power (45) = 16.70
/// Nodes = 12
/// HD = 182528
/// MAE = 3.53906
/// MSE = 24.26562
/// MRE = 1.77 %
/// WCE = 15
/// WCRE = 300 %
/// EP = 85.6 %
uint16_t add8_239(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 n53;
uint8_t n55;
uint8_t n78;
uint8_t n126;
uint8_t n127;
uint8_t n132;
uint8_t n182;
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 = ~(n20 & n22 & n6);
n39 = ~(n33 | n14 | n30);
n53 = n4 & n39;
n55 = n53;
n78 = n55;
n126 = ~n78;
n127 = ~n78;
n132 = n4 | n20;
n182 = n6 | n22;
n232 = (n8 ^ n24) ^ n78;
n233 = (n8 & n24) | (n24 & n78) | (n8 & n78);
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 |= (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;
}