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