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author | Clifford Wolf <clifford@clifford.at> | 2013-06-07 10:38:35 +0200 |
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committer | Clifford Wolf <clifford@clifford.at> | 2013-06-07 10:38:35 +0200 |
commit | 3371563f2f14ce0d6bc7798d0fc802b54aae93c8 (patch) | |
tree | ae171f088f8dcf7760c014bc75f9fae84ee1fa25 /libs/ezsat/demo_bit.cc | |
parent | c32b9186815d0f129d923749a3c668c32f343c53 (diff) | |
download | yosys-3371563f2f14ce0d6bc7798d0fc802b54aae93c8.tar.gz yosys-3371563f2f14ce0d6bc7798d0fc802b54aae93c8.tar.bz2 yosys-3371563f2f14ce0d6bc7798d0fc802b54aae93c8.zip |
Added ezSAT library
Diffstat (limited to 'libs/ezsat/demo_bit.cc')
-rw-r--r-- | libs/ezsat/demo_bit.cc | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/libs/ezsat/demo_bit.cc b/libs/ezsat/demo_bit.cc new file mode 100644 index 000000000..2a5099bf7 --- /dev/null +++ b/libs/ezsat/demo_bit.cc @@ -0,0 +1,71 @@ +/* + * ezSAT -- A simple and easy to use CNF generator for SAT solvers + * + * Copyright (C) 2013 Clifford Wolf <clifford@clifford.at> + * + * Permission to use, copy, modify, and/or distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + * + */ + +#include "ezminisat.h" +#include <stdio.h> + +void print_results(bool satisfiable, const std::vector<bool> &modelValues) +{ + if (!satisfiable) { + printf("not satisfiable.\n\n"); + } else { + printf("satisfiable:"); + for (auto val : modelValues) + printf(" %d", val ? 1 : 0); + printf("\n\n"); + } +} + +int main() +{ + ezMiniSAT sat; + + // 3 input AOI-Gate + // 'pos_active' encodes the condition under which the pullup path of the gate is active + // 'neg_active' encodes the condition under which the pulldown path of the gate is active + // 'impossible' encodes the condition that both or none of the above paths is active + int pos_active = sat.AND(sat.NOT("A"), sat.OR(sat.NOT("B"), sat.NOT("C"))); + int neg_active = sat.OR("A", sat.AND("B", "C")); + int impossible = sat.IFF(pos_active, neg_active); + + std::vector<int> modelVars; + std::vector<bool> modelValues; + bool satisfiable; + + modelVars.push_back(sat.VAR("A")); + modelVars.push_back(sat.VAR("B")); + modelVars.push_back(sat.VAR("C")); + + printf("\n"); + + printf("pos_active: %s\n", sat.to_string(pos_active).c_str()); + satisfiable = sat.solve(modelVars, modelValues, pos_active); + print_results(satisfiable, modelValues); + + printf("neg_active: %s\n", sat.to_string(neg_active).c_str()); + satisfiable = sat.solve(modelVars, modelValues, neg_active); + print_results(satisfiable, modelValues); + + printf("impossible: %s\n", sat.to_string(impossible).c_str()); + satisfiable = sat.solve(modelVars, modelValues, impossible); + print_results(satisfiable, modelValues); + + return 0; +} + |