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-rw-r--r--backends/btor/btor.cc19
1 files changed, 11 insertions, 8 deletions
diff --git a/backends/btor/btor.cc b/backends/btor/btor.cc
index 5be9bf324..7dec70545 100644
--- a/backends/btor/btor.cc
+++ b/backends/btor/btor.cc
@@ -446,25 +446,28 @@ struct BtorWorker
goto okay;
}
- if (cell->type.in(ID($not), ID($neg), ID($_NOT_)))
+ if (cell->type.in(ID($not), ID($neg), ID($_NOT_), ID($pos)))
{
string btor_op;
if (cell->type.in(ID($not), ID($_NOT_))) btor_op = "not";
if (cell->type == ID($neg)) btor_op = "neg";
- log_assert(!btor_op.empty());
int width = std::max(GetSize(cell->getPort(ID::A)), GetSize(cell->getPort(ID::Y)));
bool a_signed = cell->hasParam(ID::A_SIGNED) ? cell->getParam(ID::A_SIGNED).as_bool() : false;
-
- int sid = get_bv_sid(width);
int nid_a = get_sig_nid(cell->getPort(ID::A), width, a_signed);
-
- int nid = next_nid++;
- btorf("%d %s %d %d%s\n", nid, btor_op.c_str(), sid, nid_a, getinfo(cell).c_str());
-
SigSpec sig = sigmap(cell->getPort(ID::Y));
+ // the $pos cell just passes through, all other cells need an actual operation applied
+ int nid = nid_a;
+ if (cell->type != ID($pos))
+ {
+ log_assert(!btor_op.empty());
+ int sid = get_bv_sid(width);
+ nid = next_nid++;
+ btorf("%d %s %d %d%s\n", nid, btor_op.c_str(), sid, nid_a, getinfo(cell).c_str());
+ }
+
if (GetSize(sig) < width) {
int sid = get_bv_sid(GetSize(sig));
int nid2 = next_nid++;