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-rw-r--r--ice40/arch.cc2
m---------tests0
2 files changed, 1 insertions, 1 deletions
diff --git a/ice40/arch.cc b/ice40/arch.cc
index 23a2130c..4370b581 100644
--- a/ice40/arch.cc
+++ b/ice40/arch.cc
@@ -1021,7 +1021,7 @@ TimingPortClass Arch::getPortTimingClass(const CellInfo *cell, IdString port, in
return TMG_IGNORE;
} else if (cell->type == id_SB_GB) {
if (port == id_GLOBAL_BUFFER_OUTPUT)
- return TMG_COMB_OUTPUT;
+ return cell->gbInfo.forPadIn ? TMG_GEN_CLOCK : TMG_COMB_OUTPUT;
return TMG_COMB_INPUT;
} else if (cell->type == id_SB_WARMBOOT) {
return TMG_ENDPOINT;
diff --git a/tests b/tests
-Subproject 691dfb8204131bec7f1c5e139764bf418640f94
+Subproject baf928b5c688d1d8409da28f76c36f74e79a93a