diff options
Diffstat (limited to 'backends/btor')
| -rw-r--r-- | backends/btor/btor.cc | 42 |
1 files changed, 36 insertions, 6 deletions
diff --git a/backends/btor/btor.cc b/backends/btor/btor.cc index 511a11942..7c054d655 100644 --- a/backends/btor/btor.cc +++ b/backends/btor/btor.cc @@ -17,6 +17,11 @@ * */ +// [[CITE]] Btor2 , BtorMC and Boolector 3.0 +// Aina Niemetz, Mathias Preiner, Clifford Wolf, Armin Biere +// Computer Aided Verification - 30th International Conference, CAV 2018 +// https://cs.stanford.edu/people/niemetz/publication/2018/niemetzpreinerwolfbiere-cav18/ + #include "kernel/rtlil.h" #include "kernel/register.h" #include "kernel/sigtools.h" @@ -491,7 +496,7 @@ struct BtorWorker goto okay; } - if (cell->type.in("$mux", "$_MUX_")) + if (cell->type.in("$mux", "$_MUX_", "$_NMUX_")) { SigSpec sig_a = sigmap(cell->getPort("\\A")); SigSpec sig_b = sigmap(cell->getPort("\\B")); @@ -506,6 +511,12 @@ struct BtorWorker int nid = next_nid++; btorf("%d ite %d %d %d %d\n", nid, sid, nid_s, nid_b, nid_a); + if (cell->type == "$_NMUX_") { + int tmp = nid; + nid = next_nid++; + btorf("%d not %d %d\n", nid, sid, tmp); + } + add_nid_sig(nid, sig_y); goto okay; } @@ -605,8 +616,8 @@ struct BtorWorker if (initstate_nid < 0) { int sid = get_bv_sid(1); - int one_nid = get_sig_nid(Const(1, 1)); - int zero_nid = get_sig_nid(Const(0, 1)); + int one_nid = get_sig_nid(State::S1); + int zero_nid = get_sig_nid(State::S0); initstate_nid = next_nid++; btorf("%d state %d\n", initstate_nid, sid); btorf("%d init %d %d %d\n", next_nid++, sid, initstate_nid, one_nid); @@ -875,9 +886,28 @@ struct BtorWorker else { if (bit_cell.count(bit) == 0) - log_error("No driver for signal bit %s.\n", log_signal(bit)); - export_cell(bit_cell.at(bit)); - log_assert(bit_nid.count(bit)); + { + SigSpec s = bit; + + while (i+GetSize(s) < GetSize(sig) && sig[i+GetSize(s)].wire != nullptr && + bit_cell.count(sig[i+GetSize(s)]) == 0) + s.append(sig[i+GetSize(s)]); + + log_warning("No driver for signal %s.\n", log_signal(s)); + + int sid = get_bv_sid(GetSize(s)); + int nid = next_nid++; + btorf("%d input %d %s\n", nid, sid); + nid_width[nid] = GetSize(s); + + i += GetSize(s)-1; + continue; + } + else + { + export_cell(bit_cell.at(bit)); + log_assert(bit_nid.count(bit)); + } } } |