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ecp5: Fix derivation of OSCG timing constraint

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Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2020-06-29 22:11:00 +01:00
parent 32e655d0af
commit c0901fb972
1 changed files with 5 additions and 1 deletions
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6
ecp5/pack.cc
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@ -2853,10 +2853,14 @@ class Ecp5Packer
while (!changed_nets.empty() && iter < itermax) { while (!changed_nets.empty() && iter < itermax) {
++iter; ++iter;
std::unordered_set<IdString> changed_cells; std::unordered_set<IdString> changed_cells;
for (auto net : changed_nets) for (auto net : changed_nets) {
for (auto &user : ctx->nets.at(net)->users) for (auto &user : ctx->nets.at(net)->users)
if (user.port == id_CLKI || user.port == id_ECLKI || user.port == id_CLK0 || user.port == id_CLK1) if (user.port == id_CLKI || user.port == id_ECLKI || user.port == id_CLK0 || user.port == id_CLK1)
changed_cells.insert(user.cell->name); changed_cells.insert(user.cell->name);
auto &drv = ctx->nets.at(net)->driver;
if (iter == 1 && drv.cell != nullptr && drv.port == id_OSC)
changed_cells.insert(drv.cell->name);
}
changed_nets.clear(); changed_nets.clear();
for (auto cell : sorted(changed_cells)) { for (auto cell : sorted(changed_cells)) {
CellInfo *ci = ctx->cells.at(cell).get(); CellInfo *ci = ctx->cells.at(cell).get();