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107 lines
2.6 KiB
C++
107 lines
2.6 KiB
C++
/*
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** Copyright (C) 2018 Martin Brain
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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 <http://www.gnu.org/licenses/>.
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*/
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/*
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** classify.h
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**
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** Martin Brain
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** martin.brain@cs.ox.ac.uk
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** 21/08/14
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**
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** The classification functions for different classes of float.
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**
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*/
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#include "symfpu/core/unpackedFloat.h"
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#ifndef SYMFPU_CLASSIFY
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#define SYMFPU_CLASSIFY
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namespace symfpu {
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template <class t>
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typename t::prop isNormal (const typename t::fpt &format, const unpackedFloat<t> &uf) {
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PRECONDITION(uf.valid(format));
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return !uf.getNaN() && !uf.getInf() && !uf.getZero() && uf.inNormalRange(format, typename t::prop(true));
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}
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template <class t>
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typename t::prop isSubnormal (const typename t::fpt &format, const unpackedFloat<t> &uf) {
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PRECONDITION(uf.valid(format));
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return !uf.getNaN() && !uf.getInf() && !uf.getZero() && uf.inSubnormalRange(format, typename t::prop(true));
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}
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template <class t>
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typename t::prop isZero (const typename t::fpt &format, const unpackedFloat<t> &uf) {
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PRECONDITION(uf.valid(format));
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return uf.getZero();
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}
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template <class t>
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typename t::prop isInfinite (const typename t::fpt &format, const unpackedFloat<t> &uf) {
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PRECONDITION(uf.valid(format));
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return uf.getInf();
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}
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template <class t>
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typename t::prop isNaN (const typename t::fpt &format, const unpackedFloat<t> &uf) {
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PRECONDITION(uf.valid(format));
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return uf.getNaN();
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}
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// Note these are the SMT-LIB semantics, NaN is neither positive or negative
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template <class t>
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typename t::prop isPositive (const typename t::fpt &format, const unpackedFloat<t> &uf) {
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PRECONDITION(uf.valid(format));
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return !uf.getNaN() && !uf.getSign();
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}
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template <class t>
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typename t::prop isNegative (const typename t::fpt &format, const unpackedFloat<t> &uf) {
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PRECONDITION(uf.valid(format));
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return !uf.getNaN() && uf.getSign();
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}
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// C semantics
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template <class t>
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typename t::prop isFinite (const typename t::fpt &format, const unpackedFloat<t> &uf) {
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PRECONDITION(uf.valid(format));
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return !uf.getNaN() && !uf.getInf();
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}
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}
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#endif
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