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