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machxo2: Add additional packing phase to pack remaining FFs.

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This commit is contained in:
William D. Jones 2021-02-02 03:37:28 -05:00 committed by gatecat
parent f18df5ed59
commit 3ab300a28e
1 changed files with 38 additions and 0 deletions
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38
machxo2/pack.cc
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@ -86,6 +86,43 @@ static void pack_lut_lutffs(Context *ctx)
}
}
static void pack_remaining_ffs(Context *ctx)
{
log_info("Packing remaining FFs..\n");
std::unordered_set<IdString> packed_cells;
std::vector<std::unique_ptr<CellInfo>> new_cells;
for (auto cell : sorted(ctx->cells)) {
CellInfo *ci = cell.second;
if (is_ff(ctx, ci)) {
if (ctx->verbose)
log_info("cell '%s' of type '%s remains unpacked'\n", ci->name.c_str(ctx), ci->type.c_str(ctx));
std::unique_ptr<CellInfo> packed = create_machxo2_cell(ctx, id_FACADE_SLICE, ci->name.str(ctx) + "_LC");
std::copy(ci->attrs.begin(), ci->attrs.end(), std::inserter(packed->attrs, packed->attrs.begin()));
auto dff_bel = ci->attrs.find(ctx->id("BEL"));
dff_to_lc(ctx, ci, packed.get(), false);
if (dff_bel != ci->attrs.end())
packed->attrs[ctx->id("BEL")] = dff_bel->second;
packed_cells.insert(ci->name);
if (ctx->verbose)
log_info("packed cell %s into %s\n", ci->name.c_str(ctx), packed->name.c_str(ctx));
new_cells.push_back(std::move(packed));
}
}
for (auto pcell : packed_cells) {
ctx->cells.erase(pcell);
}
for (auto &ncell : new_cells) {
ctx->cells[ncell->name] = std::move(ncell);
}
}
// Merge a net into a constant net
static void set_net_constant(const Context *ctx, NetInfo *orig, NetInfo *constnet, bool constval)
{
@ -220,6 +257,7 @@ bool Arch::pack()
pack_constants(ctx);
pack_io(ctx);
pack_lut_lutffs(ctx);
pack_remaining_ffs(ctx);
ctx->settings[ctx->id("pack")] = 1;
ctx->assignArchInfo();
log_info("Checksum: 0x%08x\n", ctx->checksum());