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/*
* nextpnr -- Next Generation Place and Route
*
* Copyright (C) 2018 Clifford Wolf <clifford@clifford.at>
*
* 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 "nextpnr.h"
#ifndef ICE40_CELLS_H
#define ICE40_CELLS_H
// Create a standard iCE40 cell and return it
// Name will be automatically assigned if not specified
CellInfo *create_ice_cell(Design *design, IdString type,
IdString name = IdString());
// Return true if a cell is a LUT
inline bool is_lut(const CellInfo *cell) { return cell->type == "SB_LUT4"; }
// Return true if a cell is a flipflop
inline bool is_ff(const CellInfo *cell)
{
return cell->type == "SB_DFF" || cell->type == "SB_DFFE" ||
cell->type == "SB_DFFSR" || cell->type == "SB_DFFR" ||
cell->type == "SB_DFFSS" || cell->type == "SB_DFFS" ||
cell->type == "SB_DFFESR" || cell->type == "SB_DFFER" ||
cell->type == "SB_DFFESS" || cell->type == "SB_DFFES" ||
cell->type == "SB_DFFN" || cell->type == "SB_DFFNE" ||
cell->type == "SB_DFFNSR" || cell->type == "SB_DFFNR" ||
cell->type == "SB_DFFNSS" || cell->type == "SB_DFFNS" ||
cell->type == "SB_DFFNESR" || cell->type == "SB_DFFNER" ||
cell->type == "SB_DFFNESS" || cell->type == "SB_DFFNES";
}
// Convert a SB_LUT primitive to (part of) an ICESTORM_LC, swapping ports
// as needed. Set no_dff if a DFF is not being used, so that the output
// can be reconnected
void lut_to_lc(CellInfo *lut, CellInfo *lc, bool no_dff = true);
// Convert a SB_DFFx primitive to (part of) an ICESTORM_LC, setting parameters
// and reconnecting signals as necessary. If pass_thru_lut is True, the LUT will
// be configured as pass through and D connected to I0, otherwise D will be
// ignored
void dff_to_lc(CellInfo *dff, CellInfo *lc, bool pass_thru_lut = false);
#endif
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