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ice40: Move clock constraints across SB_IO and SB_GB_IO

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Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2019-09-13 16:59:41 +01:00
parent 2ace9b5ad3
commit 9e8976996e
1 changed files with 20 additions and 0 deletions
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20
ice40/pack.cc
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@ -490,6 +490,26 @@ static void pack_io(Context *ctx)
sb->type.c_str(ctx), sb->name.c_str(ctx));
if (net != nullptr) {
if (net->clkconstr != nullptr) {
if (sb->ports.count(id_D_IN_0)) {
NetInfo *din0_net = sb->ports.at(id_D_IN_0).net;
if (din0_net != nullptr && !din0_net->clkconstr) {
// Copy clock constraint from IO pad to input buffer output
din0_net->clkconstr =
std::unique_ptr<ClockConstraint>(new ClockConstraint(*net->clkconstr));
}
}
if (is_sb_gb_io(ctx, sb) && sb->ports.count(id_GLOBAL_BUFFER_OUTPUT)) {
NetInfo *gb_net = sb->ports.at(id_GLOBAL_BUFFER_OUTPUT).net;
if (gb_net != nullptr && !gb_net->clkconstr) {
// Copy clock constraint from IO pad to global buffer output
gb_net->clkconstr =
std::unique_ptr<ClockConstraint>(new ClockConstraint(*net->clkconstr));
}
}
}
delete_nets.insert(net->name);
sb->ports.at(ctx->id("PACKAGE_PIN")).net = nullptr;
}