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ecp5: Handle the case where both CE are the same constant

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Signed-off-by: gatecat <gatecat@ds0.me>
This commit is contained in:
gatecat 2023-02-09 11:12:15 +01:00
parent a93f49eb04
commit a8a88d4813
1 changed files with 8 additions and 2 deletions
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10
ecp5/pack.cc
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@ -1508,6 +1508,10 @@ class Ecp5Packer
// Check if two nets have identical constant drivers
bool equal_constant(NetInfo *a, NetInfo *b)
{
if (a == nullptr && b == nullptr)
return true;
if ((a == nullptr) != (b == nullptr))
return false;
if (a->driver.cell == nullptr || b->driver.cell == nullptr)
return (a->driver.cell == nullptr && b->driver.cell == nullptr);
if (a->driver.cell->type != id_GND && a->driver.cell->type != id_VCC)
@ -2237,7 +2241,8 @@ class Ecp5Packer
iol->params[id_CEMUX] = str_or_default(ci->params, id_CEMUX, "CE");
ci->movePortTo(id_CE, iol, id_CE);
} else {
if (iol->getPort(id_CE) != ci->getPort(id_CE) ||
if ((iol->getPort(id_CE) != ci->getPort(id_CE) &&
!equal_constant(iol->getPort(id_CE), ci->getPort(id_CE))) ||
str_or_default(ci->params, id_CEMUX, "CE") !=
str_or_default(iol->params, id_CEMUX, "CE"))
log_error("CE signal or polarity mismatch for IO flipflop %s with other IOFFs at "
@ -2303,7 +2308,8 @@ class Ecp5Packer
iol->params[id_CEMUX] = str_or_default(ci->params, id_CEMUX, "CE");
ci->movePortTo(id_CE, iol, id_CE);
} else {
if (iol->getPort(id_CE) != ci->getPort(id_CE) ||
if ((iol->getPort(id_CE) != ci->getPort(id_CE) &&
!equal_constant(iol->getPort(id_CE), ci->getPort(id_CE))) ||
str_or_default(ci->params, id_CEMUX, "CE") !=
str_or_default(iol->params, id_CEMUX, "CE"))
log_error("CE signal or polarity mismatch for IO flipflop %s with other IOFFs at "