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/*
* nextpnr -- Next Generation Place and Route
*
* Copyright (C) 2019 gatecat <gatecat@ds0.me>
* Copyright (C) 2021 William D. Jones <wjones@wdj-consulting.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 "nextpnr.h"
#ifndef MACHXO2_CELLS_H
#define MACHXO2_CELLS_H
NEXTPNR_NAMESPACE_BEGIN
// When packing DFFs, we need context of how it's connected to a LUT to
// properly map DFF ports to FACADE_SLICEs; DI0 input muxes F0 and OFX0,
// and a DFF inside a slice can use either DI0 or M0 as an input.
enum class LutType
{
None,
Normal,
PassThru,
};
// Create a MachXO2 arch cell and return it
// Name will be automatically assigned if not specified
std::unique_ptr<CellInfo> create_machxo2_cell(Context *ctx, IdString type, std::string name = "");
// Return true if a cell is a LUT
inline bool is_lut(const BaseCtx *ctx, const CellInfo *cell) { return cell->type == ctx->id("LUT4"); }
// Return true if a cell is a flipflop
inline bool is_ff(const BaseCtx *ctx, const CellInfo *cell) { return cell->type == ctx->id("FACADE_FF"); }
inline bool is_lc(const BaseCtx *ctx, const CellInfo *cell) { return cell->type == ctx->id("FACADE_SLICE"); }
// Convert a LUT primitive to (part of) an GENERIC_SLICE, 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(const Context *ctx, CellInfo *lut, CellInfo *lc, bool no_dff = true);
// Convert a DFF primitive to (part of) an GENERIC_SLICE, 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(Context *ctx, CellInfo *dff, CellInfo *lc, LutType lut_type = LutType::Normal);
// Convert a nextpnr IO buffer to a GENERIC_IOB
void nxio_to_iob(Context *ctx, CellInfo *nxio, CellInfo *sbio, pool<IdString> &todelete_cells);
NEXTPNR_NAMESPACE_END
#endif
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