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Clock prerouting Gowin fix? #1327

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3 changes: 2 additions & 1 deletion himbaechel/uarch/gowin/constids.inc
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Original file line number Diff line number Diff line change
Expand Up @@ -1192,4 +1192,5 @@ X(HCLK_OUT3)
X(BUFG)
X(CLOCK)


// Globally routed
X(GLOBALLY_ROUTED)
5 changes: 5 additions & 0 deletions himbaechel/uarch/gowin/globals.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -196,7 +196,10 @@ struct GowinGlobalRouter
}
if (routed == NOT_ROUTED) {
ctx->unbindWire(src);
} else {
net->attrs[id_GLOBALLY_ROUTED] = Property("YES");
}

return routed;
}

Expand Down Expand Up @@ -233,6 +236,8 @@ struct GowinGlobalRouter
}
if (routed == NOT_ROUTED) {
ctx->unbindWire(src);
} else {
net->attrs[id_GLOBALLY_ROUTED] = Property("YES");
}

// b) route net before buf from whatever to the buf input
Expand Down
11 changes: 11 additions & 0 deletions himbaechel/uarch/gowin/gowin.cc
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Expand Up @@ -41,6 +41,7 @@ struct GowinImpl : HimbaechelAPI

// wires
bool checkPipAvail(PipId pip) const override;
bool checkPipAvailForNet(PipId pip, const NetInfo *net) const override;

// Cluster
bool isClusterStrict(const CellInfo *cell) const { return true; }
Expand Down Expand Up @@ -188,6 +189,16 @@ void GowinImpl::init(Context *ctx)
// We do not allow the use of global wires that bypass a special router.
bool GowinImpl::checkPipAvail(PipId pip) const { return !gwu.is_global_pip(pip); }

bool GowinImpl::checkPipAvailForNet(PipId pip, const NetInfo *net) const {
if (gwu.is_global_pip(pip)) {
// Available for a globally routed net
auto prop = net->attrs.find(id_GLOBALLY_ROUTED);
return prop != net->attrs.end() && prop->second == Property("YES");
}

return true;
}

void GowinImpl::pack()
{
if (ctx->settings.count(ctx->id("cst.filename"))) {
Expand Down