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/*
* nextpnr -- Next Generation Place and Route
*
* Copyright (C) 2018 David Shah <david@symbioticeda.com>
*
* 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.
*
*/
#include "cells.h"
#include "log.h"
#include "nextpnr.h"
#include "util.h"
NEXTPNR_NAMESPACE_BEGIN
inline NetInfo *port_or_nullptr(const CellInfo *cell, IdString name)
{
auto found = cell->ports.find(name);
if (found == cell->ports.end())
return nullptr;
return found->second.net;
}
bool Arch::slicesCompatible(const std::vector<const CellInfo *> &cells) const
{
// TODO: allow different LSR/CLK and MUX/SRMODE settings once
// routing details are worked out
IdString clk_sig, lsr_sig;
IdString CLKMUX, LSRMUX, SRMODE;
bool first = true;
for (auto cell : cells) {
if (cell->sliceInfo.using_dff) {
if (first) {
clk_sig = cell->sliceInfo.clk_sig;
lsr_sig = cell->sliceInfo.lsr_sig;
CLKMUX = cell->sliceInfo.clkmux;
LSRMUX = cell->sliceInfo.lsrmux;
SRMODE = cell->sliceInfo.srmode;
} else {
if (cell->sliceInfo.clk_sig != clk_sig)
return false;
if (cell->sliceInfo.lsr_sig != lsr_sig)
return false;
if (cell->sliceInfo.clkmux != CLKMUX)
return false;
if (cell->sliceInfo.lsrmux != LSRMUX)
return false;
if (cell->sliceInfo.srmode != SRMODE)
return false;
}
first = false;
}
}
return true;
}
bool Arch::isBelLocationValid(BelId bel) const
{
if (getBelType(bel) == id_TRELLIS_SLICE) {
std::vector<const CellInfo *> bel_cells;
Loc bel_loc = getBelLocation(bel);
for (auto bel_other : getBelsByTile(bel_loc.x, bel_loc.y)) {
CellInfo *cell_other = getBoundBelCell(bel_other);
if (cell_other != nullptr) {
bel_cells.push_back(cell_other);
}
}
return slicesCompatible(bel_cells);
} else {
CellInfo *cell = getBoundBelCell(bel);
if (cell == nullptr)
return true;
else
return isValidBelForCell(cell, bel);
}
}
bool Arch::isValidBelForCell(CellInfo *cell, BelId bel) const
{
if (cell->type == id_TRELLIS_SLICE) {
NPNR_ASSERT(getBelType(bel) == id_TRELLIS_SLICE);
std::vector<const CellInfo *> bel_cells;
Loc bel_loc = getBelLocation(bel);
for (auto bel_other : getBelsByTile(bel_loc.x, bel_loc.y)) {
CellInfo *cell_other = getBoundBelCell(bel_other);
if (cell_other != nullptr && bel_other != bel) {
bel_cells.push_back(cell_other);
}
}
bel_cells.push_back(cell);
return slicesCompatible(bel_cells);
} else {
// other checks
return true;
}
}
NEXTPNR_NAMESPACE_END
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