56 lines
2.3 KiB
C++
56 lines
2.3 KiB
C++
/*
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* nextpnr -- Next Generation Place and Route
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*
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* Copyright (C) 2019 David Shah <david@symbioticeda.com>
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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 GENERIC_CELLS_H
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#define GENERIC_CELLS_H
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NEXTPNR_NAMESPACE_BEGIN
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// Create a generic arch cell and return it
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// Name will be automatically assigned if not specified
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std::unique_ptr<CellInfo> create_generic_cell(Context *ctx, IdString type, std::string name = "");
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// Return true if a cell is a LUT
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inline bool is_lut(const BaseCtx *ctx, const CellInfo *cell) { return cell->type == ctx->id("LUT"); }
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// Return true if a cell is a flipflop
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inline bool is_ff(const BaseCtx *ctx, const CellInfo *cell) { return cell->type == ctx->id("DFF"); }
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inline bool is_lc(const BaseCtx *ctx, const CellInfo *cell) { return cell->type == ctx->id("GENERIC_SLICE"); }
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// Convert a LUT primitive to (part of) an GENERIC_SLICE, swapping ports
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// as needed. Set no_dff if a DFF is not being used, so that the output
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// can be reconnected
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void lut_to_lc(const Context *ctx, CellInfo *lut, CellInfo *lc, bool no_dff = true);
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// Convert a DFF primitive to (part of) an GENERIC_SLICE, 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(const Context *ctx, CellInfo *dff, CellInfo *lc, bool pass_thru_lut = false);
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// Convert a nextpnr IO buffer to a GENERIC_IOB
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void nxio_to_iob(Context *ctx, CellInfo *nxio, CellInfo *sbio, std::unordered_set<IdString> &todelete_cells);
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NEXTPNR_NAMESPACE_END
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#endif
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