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-rw-r--r--ice40/pack.cc11
1 files changed, 10 insertions, 1 deletions
diff --git a/ice40/pack.cc b/ice40/pack.cc
index edd12f92..7a27d505 100644
--- a/ice40/pack.cc
+++ b/ice40/pack.cc
@@ -462,7 +462,8 @@ static bool is_logic_port(BaseCtx *ctx, const PortRef &port)
static void insert_global(Context *ctx, NetInfo *net, bool is_reset, bool is_cen, bool is_logic)
{
- log_info("promoting %s%s%s%s\n", net->name.c_str(ctx), is_reset ? " [reset]" : "", is_cen ? " [cen]" : "", is_logic ? " [logic]" : "");
+ log_info("promoting %s%s%s%s\n", net->name.c_str(ctx), is_reset ? " [reset]" : "", is_cen ? " [cen]" : "",
+ is_logic ? " [logic]" : "");
std::string glb_name = net->name.str(ctx) + std::string("_$glb_") + (is_reset ? "sr" : (is_cen ? "ce" : "clk"));
std::unique_ptr<CellInfo> gb = create_ice_cell(ctx, ctx->id("SB_GB"), "$gbuf_" + glb_name);
@@ -489,6 +490,14 @@ static void insert_global(Context *ctx, NetInfo *net, bool is_reset, bool is_cen
}
}
net->users = keep_users;
+
+ if (net->clkconstr) {
+ glbnet->clkconstr = std::unique_ptr<ClockConstraint>(new ClockConstraint());
+ glbnet->clkconstr->low = net->clkconstr->low;
+ glbnet->clkconstr->high = net->clkconstr->high;
+ glbnet->clkconstr->period = net->clkconstr->period;
+ }
+
ctx->nets[glbnet->name] = std::move(glbnet);
ctx->cells[gb->name] = std::move(gb);
}