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Fixes and improvements in ezSAT library

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Clifford Wolf 2013-06-08 12:14:20 +02:00
parent c681c17038
commit 25ae2d4df0
5 changed files with 202 additions and 10 deletions
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libs/ezsat/demo_cmp.cc Normal file
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/*
* 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 <assert.h>
#define INIT_X 123456789
#define INIT_Y 362436069
#define INIT_Z 521288629
#define INIT_W 88675123
uint32_t xorshift128() {
static uint32_t x = INIT_X;
static uint32_t y = INIT_Y;
static uint32_t z = INIT_Z;
static uint32_t w = INIT_W;
uint32_t t = x ^ (x << 11);
x = y; y = z; z = w;
w ^= (w >> 19) ^ t ^ (t >> 8);
return w;
}
void test_cmp(uint32_t a, uint32_t b)
{
ezMiniSAT sat;
printf("A = %10u (%10d)\n", a, int32_t(a));
printf("B = %10u (%10d)\n", b, int32_t(b));
printf("\n");
std::vector<int> va = sat.vec_var("a", 32);
std::vector<int> vb = sat.vec_var("b", 32);
sat.vec_set_unsigned(va, a);
sat.vec_set_unsigned(vb, b);
#define MONITOR_VARS \
X(carry) X(overflow) X(sign) X(zero) \
X(lt_signed) X(le_signed) X(ge_signed) X(gt_signed) \
X(lt_unsigned) X(le_unsigned) X(ge_unsigned) X(gt_unsigned)
#define X(_n) int _n; bool _n ## _master;
MONITOR_VARS
#undef X
carry_master = ((uint64_t(a) - uint64_t(b)) >> 32) & 1;
overflow_master = (int32_t(a) - int32_t(b)) != (int64_t(int32_t(a)) - int64_t(int32_t(b)));
sign_master = ((a - b) >> 31) & 1;
zero_master = a == b;
sat.vec_cmp(va, vb, carry, overflow, sign, zero);
lt_signed_master = int32_t(a) < int32_t(b);
le_signed_master = int32_t(a) <= int32_t(b);
ge_signed_master = int32_t(a) >= int32_t(b);
gt_signed_master = int32_t(a) > int32_t(b);
lt_unsigned_master = a < b;
le_unsigned_master = a <= b;
ge_unsigned_master = a >= b;
gt_unsigned_master = a > b;
lt_signed = sat.vec_lt_signed(va, vb);
le_signed = sat.vec_le_signed(va, vb);
ge_signed = sat.vec_ge_signed(va, vb);
gt_signed = sat.vec_gt_signed(va, vb);
lt_unsigned = sat.vec_lt_unsigned(va, vb);
le_unsigned = sat.vec_le_unsigned(va, vb);
ge_unsigned = sat.vec_ge_unsigned(va, vb);
gt_unsigned = sat.vec_gt_unsigned(va, vb);
std::vector<int> modelExpressions;
std::vector<bool> modelValues, modelMaster;
std::vector<std::string> modelNames;
#define X(_n) modelExpressions.push_back(_n); modelNames.push_back(#_n); modelMaster.push_back(_n ## _master);
MONITOR_VARS
#undef X
std::vector<int> add_ab = sat.vec_add(va, vb);
std::vector<int> sub_ab = sat.vec_sub(va, vb);
std::vector<int> sub_ba = sat.vec_sub(vb, va);
sat.vec_append(modelExpressions, add_ab);
sat.vec_append(modelExpressions, sub_ab);
sat.vec_append(modelExpressions, sub_ba);
if (!sat.solve(modelExpressions, modelValues)) {
fprintf(stderr, "SAT solver failed to find a model!\n");
abort();
}
bool found_error = false;
for (size_t i = 0; i < modelMaster.size(); i++) {
if (modelMaster.at(i) != int(modelValues.at(i)))
found_error = true;
printf("%-20s %d%s\n", modelNames.at(i).c_str(), int(modelValues.at(i)),
modelMaster.at(i) != modelValues.at(i) ? " !!!" : "");
}
printf("\n");
uint32_t add_ab_value = sat.vec_model_get_unsigned(modelExpressions, modelValues, add_ab);
uint32_t sub_ab_value = sat.vec_model_get_unsigned(modelExpressions, modelValues, sub_ab);
uint32_t sub_ba_value = sat.vec_model_get_unsigned(modelExpressions, modelValues, sub_ba);
printf("%-20s %10u %10u%s\n", "result(a+b)", add_ab_value, a+b, add_ab_value != a+b ? " !!!" : "");
printf("%-20s %10u %10u%s\n", "result(a-b)", sub_ab_value, a-b, sub_ab_value != a-b ? " !!!" : "");
printf("%-20s %10u %10u%s\n", "result(b-a)", sub_ba_value, b-a, sub_ba_value != b-a ? " !!!" : "");
printf("\n");
if (found_error || add_ab_value != a+b || sub_ab_value != a-b || sub_ba_value != b-a)
abort();
}
int main()
{
printf("\n");
for (int i = 0; i < 1024; i++) {
printf("************** %d **************\n\n", i);
uint32_t a = xorshift128();
uint32_t b = xorshift128();
if (xorshift128() % 16 == 0)
a = b;
test_cmp(a, b);
}
return 0;
}