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|
/********************* */
/*! \file floatingpoint_literal_symfpu.cpp
** \verbatim
** Top contributors (to current version):
** Martin Brain, Aina Niemetz, Mathias Preiner
** This file is part of the CVC4 project.
** Copyright (c) 2009-2021 by the authors listed in the file AUTHORS
** in the top-level source directory and their institutional affiliations.
** All rights reserved. See the file COPYING in the top-level source
** directory for licensing information.\endverbatim
**
** \brief SymFPU glue code for floating-point values.
**/
#include "util/floatingpoint_literal_symfpu.h"
#include "base/check.h"
namespace CVC4 {
#ifndef CVC4_USE_SYMFPU
void FloatingPointLiteral::unfinished(void) const
{
Unimplemented() << "Floating-point literals not yet implemented.";
}
bool FloatingPointLiteral::operator==(const FloatingPointLiteral& other) const
{
unfinished();
return false;
}
size_t FloatingPointLiteral::hash(void) const
{
unfinished();
return 23;
}
#endif
namespace symfpuLiteral {
// To simplify the property macros
typedef traits t;
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::one(
const CVC4BitWidth& w)
{
return wrappedBitVector<isSigned>(w, 1);
}
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::zero(
const CVC4BitWidth& w)
{
return wrappedBitVector<isSigned>(w, 0);
}
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::allOnes(
const CVC4BitWidth& w)
{
return ~wrappedBitVector<isSigned>::zero(w);
}
template <bool isSigned>
CVC4Prop wrappedBitVector<isSigned>::isAllOnes() const
{
return (*this == wrappedBitVector<isSigned>::allOnes(getWidth()));
}
template <bool isSigned>
CVC4Prop wrappedBitVector<isSigned>::isAllZeros() const
{
return (*this == wrappedBitVector<isSigned>::zero(getWidth()));
}
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::maxValue(
const CVC4BitWidth& w)
{
if (isSigned)
{
BitVector base(w - 1, 0U);
return wrappedBitVector<true>((~base).zeroExtend(1));
}
else
{
return wrappedBitVector<false>::allOnes(w);
}
}
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::minValue(
const CVC4BitWidth& w)
{
if (isSigned)
{
BitVector base(w, 1U);
BitVector shiftAmount(w, w - 1);
BitVector result(base.leftShift(shiftAmount));
return wrappedBitVector<true>(result);
}
else
{
return wrappedBitVector<false>::zero(w);
}
}
/*** Operators ***/
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::operator<<(
const wrappedBitVector<isSigned>& op) const
{
return BitVector::leftShift(op);
}
template <>
wrappedBitVector<true> wrappedBitVector<true>::operator>>(
const wrappedBitVector<true>& op) const
{
return BitVector::arithRightShift(op);
}
template <>
wrappedBitVector<false> wrappedBitVector<false>::operator>>(
const wrappedBitVector<false>& op) const
{
return BitVector::logicalRightShift(op);
}
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::operator|(
const wrappedBitVector<isSigned>& op) const
{
return BitVector::operator|(op);
}
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::operator&(
const wrappedBitVector<isSigned>& op) const
{
return BitVector::operator&(op);
}
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::operator+(
const wrappedBitVector<isSigned>& op) const
{
return BitVector::operator+(op);
}
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::operator-(
const wrappedBitVector<isSigned>& op) const
{
return BitVector::operator-(op);
}
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::operator*(
const wrappedBitVector<isSigned>& op) const
{
return BitVector::operator*(op);
}
template <>
wrappedBitVector<false> wrappedBitVector<false>::operator/(
const wrappedBitVector<false>& op) const
{
return BitVector::unsignedDivTotal(op);
}
template <>
wrappedBitVector<false> wrappedBitVector<false>::operator%(
const wrappedBitVector<false>& op) const
{
return BitVector::unsignedRemTotal(op);
}
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::operator-(void) const
{
return BitVector::operator-();
}
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::operator~(void) const
{
return BitVector::operator~();
}
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::increment() const
{
return *this + wrappedBitVector<isSigned>::one(getWidth());
}
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::decrement() const
{
return *this - wrappedBitVector<isSigned>::one(getWidth());
}
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::signExtendRightShift(
const wrappedBitVector<isSigned>& op) const
{
return BitVector::arithRightShift(BitVector(getWidth(), op));
}
/*** Modular opertaions ***/
// No overflow checking so these are the same as other operations
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::modularLeftShift(
const wrappedBitVector<isSigned>& op) const
{
return *this << op;
}
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::modularRightShift(
const wrappedBitVector<isSigned>& op) const
{
return *this >> op;
}
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::modularIncrement() const
{
return increment();
}
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::modularDecrement() const
{
return decrement();
}
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::modularAdd(
const wrappedBitVector<isSigned>& op) const
{
return *this + op;
}
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::modularNegate() const
{
return -(*this);
}
/*** Comparisons ***/
template <bool isSigned>
CVC4Prop wrappedBitVector<isSigned>::operator==(
const wrappedBitVector<isSigned>& op) const
{
return BitVector::operator==(op);
}
template <>
CVC4Prop wrappedBitVector<true>::operator<=(
const wrappedBitVector<true>& op) const
{
return signedLessThanEq(op);
}
template <>
CVC4Prop wrappedBitVector<true>::operator>=(
const wrappedBitVector<true>& op) const
{
return !(signedLessThan(op));
}
template <>
CVC4Prop wrappedBitVector<true>::operator<(
const wrappedBitVector<true>& op) const
{
return signedLessThan(op);
}
template <>
CVC4Prop wrappedBitVector<true>::operator>(
const wrappedBitVector<true>& op) const
{
return !(signedLessThanEq(op));
}
template <>
CVC4Prop wrappedBitVector<false>::operator<=(
const wrappedBitVector<false>& op) const
{
return unsignedLessThanEq(op);
}
template <>
CVC4Prop wrappedBitVector<false>::operator>=(
const wrappedBitVector<false>& op) const
{
return !(unsignedLessThan(op));
}
template <>
CVC4Prop wrappedBitVector<false>::operator<(
const wrappedBitVector<false>& op) const
{
return unsignedLessThan(op);
}
template <>
CVC4Prop wrappedBitVector<false>::operator>(
const wrappedBitVector<false>& op) const
{
return !(unsignedLessThanEq(op));
}
/*** Type conversion ***/
// CVC4 nodes make no distinction between signed and unsigned, thus ...
template <bool isSigned>
wrappedBitVector<true> wrappedBitVector<isSigned>::toSigned(void) const
{
return wrappedBitVector<true>(*this);
}
template <bool isSigned>
wrappedBitVector<false> wrappedBitVector<isSigned>::toUnsigned(void) const
{
return wrappedBitVector<false>(*this);
}
/*** Bit hacks ***/
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::extend(
CVC4BitWidth extension) const
{
if (isSigned)
{
return BitVector::signExtend(extension);
}
else
{
return BitVector::zeroExtend(extension);
}
}
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::contract(
CVC4BitWidth reduction) const
{
Assert(getWidth() > reduction);
return extract((getWidth() - 1) - reduction, 0);
}
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::resize(
CVC4BitWidth newSize) const
{
CVC4BitWidth width = getWidth();
if (newSize > width)
{
return extend(newSize - width);
}
else if (newSize < width)
{
return contract(width - newSize);
}
else
{
return *this;
}
}
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::matchWidth(
const wrappedBitVector<isSigned>& op) const
{
Assert(getWidth() <= op.getWidth());
return extend(op.getWidth() - getWidth());
}
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::append(
const wrappedBitVector<isSigned>& op) const
{
return BitVector::concat(op);
}
// Inclusive of end points, thus if the same, extracts just one bit
template <bool isSigned>
wrappedBitVector<isSigned> wrappedBitVector<isSigned>::extract(
CVC4BitWidth upper, CVC4BitWidth lower) const
{
Assert(upper >= lower);
return BitVector::extract(upper, lower);
}
// Explicit instantiation
template class wrappedBitVector<true>;
template class wrappedBitVector<false>;
traits::rm traits::RNE(void) { return ::CVC4::ROUND_NEAREST_TIES_TO_EVEN; };
traits::rm traits::RNA(void) { return ::CVC4::ROUND_NEAREST_TIES_TO_AWAY; };
traits::rm traits::RTP(void) { return ::CVC4::ROUND_TOWARD_POSITIVE; };
traits::rm traits::RTN(void) { return ::CVC4::ROUND_TOWARD_NEGATIVE; };
traits::rm traits::RTZ(void) { return ::CVC4::ROUND_TOWARD_ZERO; };
// This is a literal back-end so props are actually bools
// so these can be handled in the same way as the internal assertions above
void traits::precondition(const traits::prop& p)
{
Assert(p);
return;
}
void traits::postcondition(const traits::prop& p)
{
Assert(p);
return;
}
void traits::invariant(const traits::prop& p)
{
Assert(p);
return;
}
} // namespace symfpuLiteral
} // namespace CVC4
|
