diff options
Diffstat (limited to 'machxo2/cells.cc')
| -rw-r--r-- | machxo2/cells.cc | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/machxo2/cells.cc b/machxo2/cells.cc index d56c6d71..9a682a72 100644 --- a/machxo2/cells.cc +++ b/machxo2/cells.cc @@ -143,12 +143,29 @@ std::unique_ptr<CellInfo> create_machxo2_cell(Context *ctx, IdString type, std:: void lut_to_lc(const Context *ctx, CellInfo *lut, CellInfo *lc, bool no_dff) { + lc->params[ctx->id("LUT0_INITVAL")] = lut->params[ctx->id("INIT")]; + for (std::string i : {"A", "B", "C", "D"}) { + IdString lut_port = ctx->id(i); + IdString lc_port = ctx->id(i + "0"); + replace_port(lut, lut_port, lc, lc_port); + } + + replace_port(lut, ctx->id("Z"), lc, ctx->id("F0")); } void dff_to_lc(const Context *ctx, CellInfo *dff, CellInfo *lc, bool pass_thru_lut) { - + // By this point, we have shown that LUT4 Z is attached to FACADE_FF DI. + // This connection will be preserved by port replacement, but the SD mux + // which selects the actual DFF input needs to be told to use the + // FACADE_SLICE DI input instead of the FACADE_SLICE M input. + lc->params[ctx->id("REG0_SD")] = std::string("0"); + + replace_port(dff, ctx->id("CLK"), lc, ctx->id("CLK")); + replace_port(dff, ctx->id("DI"), lc, ctx->id("DI0")); + replace_port(dff, ctx->id("LSR"), lc, ctx->id("LSR")); + replace_port(dff, ctx->id("Q"), lc, ctx->id("Q0")); } void nxio_to_iob(Context *ctx, CellInfo *nxio, CellInfo *iob, std::unordered_set<IdString> &todelete_cells) |