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-rw-r--r--backends/btor/btor.cc133
1 files changed, 97 insertions, 36 deletions
diff --git a/backends/btor/btor.cc b/backends/btor/btor.cc
index 61caf57e4..2a98d1aba 100644
--- a/backends/btor/btor.cc
+++ b/backends/btor/btor.cc
@@ -58,16 +58,42 @@ struct BtorWorker
// nids for constants
dict<Const, int> consts;
- // ff inputs that need to be evaluated (<nid>, <d>)
- vector<pair<int, SigSpec>> ff_todo;
+ // ff inputs that need to be evaluated (<nid>, <ff_cell>)
+ vector<pair<int, Cell*>> ff_todo;
pool<Cell*> cell_recursion_guard;
+ pool<string> output_symbols;
+ string indent;
+
+ void btorf(const char *fmt, ...)
+ {
+ va_list ap;
+ va_start(ap, fmt);
+ f << indent << vstringf(fmt, ap);
+ va_end(ap);
+ }
+
+ void btorf_push(const string &id)
+ {
+ if (verbose) {
+ f << indent << stringf(" ; begin %s\n", id.c_str());
+ indent += " ";
+ }
+ }
+
+ void btorf_pop(const string &id)
+ {
+ if (verbose) {
+ indent = indent.substr(4);
+ f << indent << stringf(" ; end %s\n", id.c_str());
+ }
+ }
int get_bv_sid(int width)
{
if (sorts_bv.count(width) == 0) {
int nid = next_nid++;
- f << stringf("%d sort bitvec %d\n", nid, width);
+ btorf("%d sort bitvec %d\n", nid, width);
sorts_bv[width] = nid;
}
return sorts_bv.at(width);
@@ -86,6 +112,7 @@ struct BtorWorker
{
log_assert(cell_recursion_guard.count(cell) == 0);
cell_recursion_guard.insert(cell);
+ btorf_push(log_id(cell));
if (cell->type.in("$add", "$sub", "$xor"))
{
@@ -107,14 +134,14 @@ struct BtorWorker
int nid_b = get_sig_nid(cell->getPort("\\B"), width, b_signed);
int nid = next_nid++;
- f << stringf("%d %s %d %d %d ; %s\n", nid, btor_op.c_str(), sid, nid_a, nid_b, log_id(cell));
+ btorf("%d %s %d %d %d\n", nid, btor_op.c_str(), sid, nid_a, nid_b);
SigSpec sig = sigmap(cell->getPort("\\Y"));
if (GetSize(sig) < width) {
int sid = get_bv_sid(GetSize(sig));
int nid2 = next_nid++;
- f << stringf("%d slice %d %d %d 0 ; %s\n", nid2, sid, nid, GetSize(sig)-1, log_id(cell));
+ btorf("%d slice %d %d %d 0\n", nid2, sid, nid, GetSize(sig)-1);
nid = nid2;
}
@@ -135,18 +162,18 @@ struct BtorWorker
if (GetSize(cell->getPort("\\A")) > 1) {
int nid_red_a = next_nid++;
- f << stringf("%d redor %d %d\n", nid_red_a, sid, nid_a);
+ btorf("%d redor %d %d\n", nid_red_a, sid, nid_a);
nid_a = nid_red_a;
}
if (GetSize(cell->getPort("\\B")) > 1) {
int nid_red_b = next_nid++;
- f << stringf("%d redor %d %d\n", nid_red_b, sid, nid_b);
+ btorf("%d redor %d %d\n", nid_red_b, sid, nid_b);
nid_b = nid_red_b;
}
int nid = next_nid++;
- f << stringf("%d %s %d %d %d ; %s\n", nid, btor_op.c_str(), sid, nid_a, nid_b, log_id(cell));
+ btorf("%d %s %d %d %d\n", nid, btor_op.c_str(), sid, nid_a, nid_b);
SigSpec sig = sigmap(cell->getPort("\\Y"));
@@ -154,7 +181,7 @@ struct BtorWorker
int sid = get_bv_sid(GetSize(sig));
int zeros_nid = get_sig_nid(Const(0, GetSize(sig)-1));
int nid2 = next_nid++;
- f << stringf("%d concat %d %d %d ; %s\n", nid2, sid, zeros_nid, nid, log_id(cell));
+ btorf("%d concat %d %d %d\n", nid2, sid, zeros_nid, nid);
nid = nid2;
}
@@ -175,7 +202,7 @@ struct BtorWorker
int sid = get_bv_sid(GetSize(sig_y));
int nid = next_nid++;
- f << stringf("%d ite %d %d %d %d ; %s\n", nid, sid, nid_s, nid_b, nid_a, log_id(cell));
+ btorf("%d ite %d %d %d %d\n", nid, sid, nid_s, nid_b, nid_a);
add_nid_sig(nid, sig_y);
goto okay;
@@ -195,9 +222,13 @@ struct BtorWorker
int sid = get_bv_sid(GetSize(sig_q));
int nid = next_nid++;
- f << stringf("%d state %d %s ; %s\n", nid, sid, symbol.c_str(), log_id(cell));
- ff_todo.push_back(make_pair(nid, sig_d));
+ if (output_symbols.count(symbol))
+ btorf("%d state %d\n", nid, sid);
+ else
+ btorf("%d state %d %s\n", nid, sid, symbol.c_str());
+
+ ff_todo.push_back(make_pair(nid, cell));
add_nid_sig(nid, sig_q);
goto okay;
}
@@ -212,9 +243,9 @@ struct BtorWorker
int one_nid = get_sig_nid(Const(1, 1));
int zero_nid = get_sig_nid(Const(0, 1));
initstate_nid = next_nid++;
- f << stringf("%d state %d ; initstate\n", initstate_nid, sid);
- f << stringf("%d init %d %d %d ; initstate\n", next_nid++, sid, initstate_nid, one_nid);
- f << stringf("%d next %d %d %d ; initstate\n", next_nid++, sid, initstate_nid, zero_nid);
+ btorf("%d state %d\n", initstate_nid, sid);
+ btorf("%d init %d %d %d\n", next_nid++, sid, initstate_nid, one_nid);
+ btorf("%d next %d %d %d\n", next_nid++, sid, initstate_nid, zero_nid);
}
add_nid_sig(initstate_nid, sig_y);
@@ -224,6 +255,7 @@ struct BtorWorker
log_error("Unsupported cell type: %s (%s)\n", log_id(cell->type), log_id(cell));
okay:
+ btorf_pop(log_id(cell));
cell_recursion_guard.erase(cell);
}
@@ -253,7 +285,7 @@ struct BtorWorker
if (consts.count(c) == 0) {
int sid = get_bv_sid(GetSize(c));
int nid = next_nid++;
- f << stringf("%d const %d %s\n", nid, sid, c.as_string().c_str());
+ btorf("%d const %d %s\n", nid, sid, c.as_string().c_str());
consts[c] = nid;
nid_width[nid] = GetSize(c);
}
@@ -295,7 +327,7 @@ struct BtorWorker
if (lower != 0 || upper+1 != nid_width.at(nid2)) {
int sid = get_bv_sid(upper-lower+1);
nid3 = next_nid++;
- f << stringf("%d slice %d %d %d %d\n", nid3, sid, nid2, upper, lower);
+ btorf("%d slice %d %d %d %d\n", nid3, sid, nid2, upper, lower);
}
int nid4 = nid3;
@@ -303,7 +335,7 @@ struct BtorWorker
if (nid >= 0) {
int sid = get_bv_sid(width+upper-lower+1);
int nid4 = next_nid++;
- f << stringf("%d concat %d %d %d\n", nid4, sid, nid, nid3);
+ btorf("%d concat %d %d %d\n", nid4, sid, nid, nid3);
}
width += upper-lower+1;
@@ -322,14 +354,14 @@ struct BtorWorker
{
int sid = get_bv_sid(to_width);
int nid2 = next_nid++;
- f << stringf("%d slice %d %d %d 0\n", nid2, sid, nid, to_width-1);
+ btorf("%d slice %d %d %d 0\n", nid2, sid, nid, to_width-1);
nid = nid2;
}
else
{
int sid = get_bv_sid(to_width);
int nid2 = next_nid++;
- f << stringf("%d %s %d %d %d\n", nid2, is_signed ? "sext" : "uext",
+ btorf("%d %s %d %d %d\n", nid2, is_signed ? "sext" : "uext",
sid, nid, to_width - GetSize(sig));
nid = nid2;
}
@@ -341,6 +373,8 @@ struct BtorWorker
BtorWorker(std::ostream &f, RTLIL::Module *module, bool verbose) :
f(f), sigmap(module), module(module), verbose(verbose)
{
+ btorf_push("inputs");
+
for (auto wire : module->wires())
{
if (!wire->port_id || !wire->port_input)
@@ -350,10 +384,12 @@ struct BtorWorker
int sid = get_bv_sid(GetSize(sig));
int nid = next_nid++;
- f << stringf("%d input %d %s\n", nid, sid, log_id(wire));
+ btorf("%d input %d %s\n", nid, sid, log_id(wire));
add_nid_sig(nid, sig);
}
+ btorf_pop("inputs");
+
for (auto cell : module->cells())
for (auto &conn : cell->connections())
{
@@ -365,18 +401,28 @@ struct BtorWorker
}
for (auto wire : module->wires())
+ if (wire->port_output)
+ output_symbols.insert(log_id(wire));
+
+ for (auto wire : module->wires())
{
if (!wire->port_id || !wire->port_output)
continue;
+ btorf_push(stringf("output %s", log_id(wire)));
+
int nid = get_sig_nid(wire);
- f << stringf("%d output %d %s\n", next_nid++, nid, log_id(wire));
+ btorf("%d output %d %s\n", next_nid++, nid, log_id(wire));
+
+ btorf_pop(stringf("output %s", log_id(wire)));
}
for (auto cell : module->cells())
{
if (cell->type == "$assume")
{
+ btorf_push(log_id(cell));
+
int sid = get_bv_sid(1);
int nid_a = get_sig_nid(cell->getPort("\\A"));
int nid_en = get_sig_nid(cell->getPort("\\EN"));
@@ -384,13 +430,17 @@ struct BtorWorker
int nid_a_or_not_en = next_nid++;
int nid = next_nid++;
- f << stringf("%d not %d %d\n", nid_not_en, sid, nid_en);
- f << stringf("%d or %d %d %d\n", nid_a_or_not_en, sid, nid_a, nid_not_en);
- f << stringf("%d constraint %d ; %s\n", nid, nid_a_or_not_en, log_id(cell));
+ btorf("%d not %d %d\n", nid_not_en, sid, nid_en);
+ btorf("%d or %d %d %d\n", nid_a_or_not_en, sid, nid_a, nid_not_en);
+ btorf("%d constraint %d\n", nid, nid_a_or_not_en);
+
+ btorf_pop(log_id(cell));
}
if (cell->type == "$assert")
{
+ btorf_push(log_id(cell));
+
int sid = get_bv_sid(1);
int nid_a = get_sig_nid(cell->getPort("\\A"));
int nid_en = get_sig_nid(cell->getPort("\\EN"));
@@ -398,22 +448,30 @@ struct BtorWorker
int nid_en_and_not_a = next_nid++;
int nid = next_nid++;
- f << stringf("%d not %d %d\n", nid_not_a, sid, nid_a);
- f << stringf("%d and %d %d %d\n", nid_en_and_not_a, sid, nid_en, nid_not_a);
- f << stringf("%d bad %d ; %s\n", nid, nid_en_and_not_a, log_id(cell));
+ btorf("%d not %d %d\n", nid_not_a, sid, nid_a);
+ btorf("%d and %d %d %d\n", nid_en_and_not_a, sid, nid_en, nid_not_a);
+ btorf("%d bad %d\n", nid, nid_en_and_not_a);
+
+ btorf_pop(log_id(cell));
}
}
while (!ff_todo.empty())
{
- vector<pair<int, SigSpec>> todo;
+ vector<pair<int, Cell*>> todo;
todo.swap(ff_todo);
for (auto &it : todo)
{
- int nid = get_sig_nid(it.second);
- int sid = get_bv_sid(GetSize(it.second));
- f << stringf("%d next %d %d %d\n", next_nid++, sid, it.first, nid);
+ btorf_push(stringf("next %s", log_id(it.second)));
+
+ SigSpec sig = sigmap(it.second->getPort("\\D"));
+
+ int nid = get_sig_nid(sig);
+ int sid = get_bv_sid(GetSize(sig));
+ btorf("%d next %d %d %d\n", next_nid++, sid, it.first, nid);
+
+ btorf_pop(stringf("next %s", log_id(it.second)));
}
}
}
@@ -429,6 +487,9 @@ struct BtorBackend : public Backend {
log("\n");
log("Write a BTOR description of the current design.\n");
log("\n");
+ log(" -v\n");
+ log(" Add comments and indentation to BTOR output file\n");
+ log("\n");
}
virtual void execute(std::ostream *&f, std::string filename, std::vector<std::string> args, RTLIL::Design *design)
{
@@ -439,10 +500,10 @@ struct BtorBackend : public Backend {
size_t argidx;
for (argidx = 1; argidx < args.size(); argidx++)
{
- // if (args[argidx] == "-verbose") {
- // verbose = true;
- // continue;
- // }
+ if (args[argidx] == "-v") {
+ verbose = true;
+ continue;
+ }
break;
}
extra_args(f, filename, args, argidx);
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-21 10:06:38 +0000