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-rw-r--r--ice40/bitstream.cc12
1 files changed, 11 insertions, 1 deletions
diff --git a/ice40/bitstream.cc b/ice40/bitstream.cc
index 3865316f..85f1e847 100644
--- a/ice40/bitstream.cc
+++ b/ice40/bitstream.cc
@@ -133,6 +133,16 @@ static const BelConfigPOD &get_ec_config(const ChipInfoPOD *chip, BelId bel)
typedef std::vector<std::vector<std::vector<std::vector<int8_t>>>> chipconfig_t;
+static bool has_ec_cbit(const BelConfigPOD &cell_cbits, std::string name)
+{
+ for (int i = 0; i < cell_cbits.num_entries; i++) {
+ const auto &cbit = cell_cbits.entries[i];
+ if (cbit.entry_name.get() == name)
+ return true;
+ }
+ return false;
+}
+
static void set_ec_cbit(chipconfig_t &config, const Context *ctx, const BelConfigPOD &cell_cbits, std::string name,
bool value, std::string prefix)
{
@@ -190,7 +200,7 @@ void configure_extra_cell(chipconfig_t &config, const Context *ctx, CellInfo *ce
}
value.resize(p.second);
- if (p.second == 1) {
+ if ((p.second == 1) || !has_ec_cbit(bc, p.first + "_0")) {
set_ec_cbit(config, ctx, bc, p.first, value.at(0), prefix);
} else {
for (int i = 0; i < p.second; i++) {