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/*
* nextpnr -- Next Generation Place and Route
*
* Copyright (C) 2021 The SymbiFlow Authors.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#ifndef CONSTRAINTS_IMPL_H
#define CONSTRAINTS_IMPL_H
#include "exclusive_state_groups.impl.h"
NEXTPNR_NAMESPACE_BEGIN
template <size_t StateCount, typename StateType, typename CountType>
template <typename ConstraintRange>
void Constraints<StateCount, StateType, CountType>::bindBel(TagState *tags, const ConstraintRange constraints)
{
for (const auto &constraint : constraints) {
switch (constraint.constraint_type()) {
case CONSTRAINT_TAG_IMPLIES:
tags[constraint.tag()].add_implies(constraint.state());
break;
case CONSTRAINT_TAG_REQUIRES:
break;
default:
NPNR_ASSERT(false);
}
}
}
template <size_t StateCount, typename StateType, typename CountType>
template <typename ConstraintRange>
void Constraints<StateCount, StateType, CountType>::unbindBel(TagState *tags, const ConstraintRange constraints)
{
for (const auto &constraint : constraints) {
switch (constraint.constraint_type()) {
case CONSTRAINT_TAG_IMPLIES:
tags[constraint.tag()].remove_implies(constraint.state());
break;
case CONSTRAINT_TAG_REQUIRES:
break;
default:
NPNR_ASSERT(false);
}
}
}
template <size_t StateCount, typename StateType, typename CountType>
template <typename ConstraintRange>
bool Constraints<StateCount, StateType, CountType>::isValidBelForCellType(const Context *ctx, uint32_t prototype,
const TagState *tags,
const ConstraintRange constraints,
IdString object, IdString cell, BelId bel,
bool explain_constraints) const
{
if (explain_constraints) {
auto &state_definition = definitions.at(prototype);
for (const auto &constraint : constraints) {
switch (constraint.constraint_type()) {
case CONSTRAINT_TAG_IMPLIES:
tags[constraint.tag()].explain_implies(ctx, object, cell, state_definition.at(constraint.tag()), bel,
constraint.state());
break;
case CONSTRAINT_TAG_REQUIRES:
tags[constraint.tag()].explain_requires(ctx, object, cell, state_definition.at(constraint.tag()), bel,
constraint.states());
break;
default:
NPNR_ASSERT(false);
}
}
}
for (const auto &constraint : constraints) {
switch (constraint.constraint_type()) {
case CONSTRAINT_TAG_IMPLIES:
if (!tags[constraint.tag()].check_implies(constraint.state())) {
return false;
}
break;
case CONSTRAINT_TAG_REQUIRES:
if (!tags[constraint.tag()].requires_range(constraint.states())) {
return false;
}
break;
default:
NPNR_ASSERT(false);
}
}
return true;
}
NEXTPNR_NAMESPACE_END
#endif
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