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