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write_btor: support $buf #4711

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write_btor: support $buf #4711

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6 changes: 3 additions & 3 deletions backends/btor/btor.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -508,7 +508,7 @@ struct BtorWorker
goto okay;
}

if (cell->type.in(ID($not), ID($neg), ID($_NOT_), ID($pos)))
if (cell->type.in(ID($not), ID($neg), ID($_NOT_), ID($pos), ID($buf)))
{
string btor_op;
if (cell->type.in(ID($not), ID($_NOT_))) btor_op = "not";
Expand All @@ -520,9 +520,9 @@ struct BtorWorker
int nid_a = get_sig_nid(cell->getPort(ID::A), width, a_signed);
SigSpec sig = sigmap(cell->getPort(ID::Y));

// the $pos cell just passes through, all other cells need an actual operation applied
// the $pos/$buf cells just pass through, all other cells need an actual operation applied
int nid = nid_a;
if (cell->type != ID($pos))
if (!cell->type.in(ID($pos), ID($buf)))
{
log_assert(!btor_op.empty());
int sid = get_bv_sid(width);
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