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acc: implement min_set() and max_set() using gcc builtins

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Fixes #238.

* spot/twa/acc.hh (max_set): Add a version using __builtin_clz().
(min_set): New method.
* tests/core/acc.cc, tests/core/acc.test: Add some tests.
This commit is contained in:
Alexandre Duret-Lutz 2017-03-02 14:17:06 +01:00
parent 22a3d1c393
commit 1eb5be543d
3 changed files with 42 additions and 7 deletions
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13
tests/core/acc.cc
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@ -1,6 +1,6 @@
// -*- coding: utf-8 -*-
// Copyright (C) 2014, 2015 Laboratoire de Recherche et Développement
// de l'Epita (LRDE).
// -*- coding: utf-8 -*-x
// Copyright (C) 2014, 2015, 2017 Laboratoire de Recherche et
// Développement de l'Epita (LRDE).
//
// This file is part of Spot, a model checking library.
//
@ -63,6 +63,10 @@ int main()
auto m2 = spot::acc_cond::mark_t({0, 3});
auto m3 = spot::acc_cond::mark_t({2, 1});
spot::acc_cond::mark_t m0 = 0U;
std::cout << m0.max_set() << ' ' << m0.min_set() << '\n';
std::cout << m3.max_set() << ' ' << m3.min_set() << '\n';
check(ac, m1);
check(ac, m2);
check(ac, m3);
@ -92,6 +96,9 @@ int main()
std::cout << ac.num_sets() << " + "
<< ac2.num_sets() << " = " << ac3.num_sets() << '\n';
auto m5 = m2 | (m3 << ac.num_sets());
std::cout << m5.max_set() << ' ' << m5.min_set() << '\n';
check(ac3, m5);
auto m6 = ac.comp(m2 & m3) | (m3 << ac.num_sets());
check(ac3, m6);