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| author | David Shah <davey1576@gmail.com> | 2018-07-17 15:48:34 +0200 |
|---|---|---|
| committer | David Shah <davey1576@gmail.com> | 2018-07-17 15:48:34 +0200 |
| commit | 6c54d4f93c4f76db0280af73d9a84fcbde1d74f6 (patch) | |
| tree | 96479ba63473c65d320ea4c6f58f1286caa8b86a /ecp5 | |
| parent | b52269bc198eb8fcc647100d4891379b7fd7346a (diff) | |
| download | nextpnr-6c54d4f93c4f76db0280af73d9a84fcbde1d74f6.tar.gz nextpnr-6c54d4f93c4f76db0280af73d9a84fcbde1d74f6.tar.bz2 nextpnr-6c54d4f93c4f76db0280af73d9a84fcbde1d74f6.zip | |
ecp5: FF packer
Signed-off-by: David Shah <davey1576@gmail.com>
Diffstat (limited to 'ecp5')
| -rw-r--r-- | ecp5/pack.cc | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/ecp5/pack.cc b/ecp5/pack.cc index 056f457c..4f864b89 100644 --- a/ecp5/pack.cc +++ b/ecp5/pack.cc @@ -318,7 +318,7 @@ class Ecp5Packer // with an optional FF also void pack_remaining_luts() { - log_info("Unpaired LUTs into a SLICE...\n"); + log_info("Packing unpaired LUTs into a SLICE...\n"); for (auto cell : sorted(ctx->cells)) { CellInfo *ci = cell.second; if (is_lut(ctx, ci)) { @@ -339,6 +339,23 @@ class Ecp5Packer flush_cells(); } + // Pack flipflops that weren't paired with a LUT + void pack_remaining_ffs() + { + log_info("Packing unpaired FFs into a SLICE...\n"); + for (auto cell : sorted(ctx->cells)) { + CellInfo *ci = cell.second; + if (is_ff(ctx, ci)) { + std::unique_ptr<CellInfo> slice = + create_ecp5_cell(ctx, ctx->id("TRELLIS_SLICE"), ci->name.str(ctx) + "_SLICE"); + ff_to_slice(ctx, ci, slice.get(), 0, false); + new_cells.push_back(std::move(slice)); + packed_cells.insert(ci->name); + } + } + flush_cells(); + } + public: void pack() { @@ -348,6 +365,7 @@ class Ecp5Packer pair_luts(); pack_lut_pairs(); pack_remaining_luts(); + pack_remaining_ffs(); } private: |