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Diffstat (limited to 'ice40/cells.h')
-rw-r--r-- | ice40/cells.h | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/ice40/cells.h b/ice40/cells.h new file mode 100644 index 00000000..1fa85413 --- /dev/null +++ b/ice40/cells.h @@ -0,0 +1,54 @@ +/* + * 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_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 |