96 lines
2.1 KiB
C++
96 lines
2.1 KiB
C++
// OpenSTA, Static Timing Analyzer
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// Copyright (c) 2025, Parallax Software, Inc.
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <https://www.gnu.org/licenses/>.
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//
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// The origin of this software must not be misrepresented; you must not
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// claim that you wrote the original software.
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//
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// Altered source versions must be plainly marked as such, and must not be
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// misrepresented as being the original software.
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//
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// This notice may not be removed or altered from any source distribution.
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#include "Fuzzy.hh"
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#include <algorithm> // max
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#include <cmath> // abs
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#include "MinMax.hh" // INF
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namespace sta {
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using std::max;
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using std::abs;
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constexpr static float float_equal_tolerance = 1E-15F;
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bool
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fuzzyEqual(float v1,
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float v2)
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{
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if (v1 == v2)
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return true;
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else if (v1 == 0.0)
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return abs(v2) < float_equal_tolerance;
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else if (v2 == 0.0)
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return abs(v1) < float_equal_tolerance;
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else
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return abs(v1 - v2) < 1E-6F * max(abs(v1), abs(v2));
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}
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bool
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fuzzyZero(float v)
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{
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return v == 0.0
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|| abs(v) < float_equal_tolerance;
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}
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bool
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fuzzyLess(float v1,
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float v2)
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{
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return v1 < v2 && !fuzzyEqual(v1, v2);
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}
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bool
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fuzzyLessEqual(float v1,
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float v2)
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{
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return v1 < v2 || fuzzyEqual(v1, v2);
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}
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bool
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fuzzyGreater(float v1,
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float v2)
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{
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return v1 > v2 && !fuzzyEqual(v1, v2);
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}
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bool
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fuzzyGreaterEqual(float v1,
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float v2)
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{
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return v1 > v2 || fuzzyEqual(v1, v2);
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}
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bool
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fuzzyInf(float value)
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{
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return fuzzyEqual(value, INF)
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|| fuzzyEqual(value, -INF);
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}
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} // namespace
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