diff options
| -rw-r--r-- | ecp5/pack.cc | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/ecp5/pack.cc b/ecp5/pack.cc index f5fd7b6e..6ae169c9 100644 --- a/ecp5/pack.cc +++ b/ecp5/pack.cc @@ -1377,6 +1377,16 @@ class Ecp5Packer } } + // Check if two nets have identical constant drivers + bool equal_constant(NetInfo *a, NetInfo *b) + { + if (a->driver.cell == nullptr || b->driver.cell == nullptr) + return (a->driver.cell == nullptr && b->driver.cell == nullptr); + if (a->driver.cell->type != ctx->id("GND") && a->driver.cell->type != ctx->id("VCC")) + return false; + return a->driver.cell->type == b->driver.cell->type; + } + // Pack IOLOGIC void pack_iologic() { @@ -1391,7 +1401,7 @@ class Ecp5Packer } else { iol->params[input ? ctx->id("CLKIMUX") : ctx->id("CLKOMUX")] = "CLK"; if (iol->ports[id_CLK].net != nullptr) { - if (iol->ports[id_CLK].net != sclk) + if (iol->ports[id_CLK].net != sclk && !equal_constant(iol->ports[id_CLK].net, sclk)) log_error("IOLOGIC '%s' has conflicting clocks '%s' and '%s'\n", iol->name.c_str(ctx), iol->ports[id_CLK].net->name.c_str(ctx), sclk->name.c_str(ctx)); } else { @@ -1410,7 +1420,7 @@ class Ecp5Packer iol->params[input ? ctx->id("LSRIMUX") : ctx->id("LSROMUX")] = "0"; } else { iol->params[input ? ctx->id("LSRIMUX") : ctx->id("LSROMUX")] = "LSRMUX"; - if (iol->ports[id_LSR].net != nullptr) { + if (iol->ports[id_LSR].net != nullptr && !equal_constant(iol->ports[id_LSR].net, lsr)) { if (iol->ports[id_LSR].net != lsr) log_error("IOLOGIC '%s' has conflicting LSR signals '%s' and '%s'\n", iol->name.c_str(ctx), iol->ports[id_LSR].net->name.c_str(ctx), lsr->name.c_str(ctx)); |