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Diffstat (limited to 'backends/smt2/smt2.cc')
-rw-r--r--backends/smt2/smt2.cc728
1 files changed, 597 insertions, 131 deletions
diff --git a/backends/smt2/smt2.cc b/backends/smt2/smt2.cc
index ddac6900..e2777ae0 100644
--- a/backends/smt2/smt2.cc
+++ b/backends/smt2/smt2.cc
@@ -32,14 +32,18 @@ struct Smt2Worker
CellTypes ct;
SigMap sigmap;
RTLIL::Module *module;
- bool bvmode, memmode, wiresmode, verbose;
- int idcounter;
+ bool bvmode, memmode, wiresmode, verbose, statebv, statedt, forallmode;
+ dict<IdString, int> &mod_stbv_width;
+ int idcounter = 0, statebv_width = 0;
- std::vector<std::string> decls, trans, hier;
+ std::vector<std::string> decls, trans, hier, dtmembers;
std::map<RTLIL::SigBit, RTLIL::Cell*> bit_driver;
std::set<RTLIL::Cell*> exported_cells, hiercells, hiercells_queue;
pool<Cell*> recursive_cells, registers;
+ pool<SigBit> clock_posedge, clock_negedge;
+ vector<string> ex_state_eq, ex_input_eq;
+
std::map<RTLIL::SigBit, std::pair<int, int>> fcache;
std::map<Cell*, int> memarrays;
std::map<int, int> bvsizes;
@@ -63,17 +67,64 @@ struct Smt2Worker
return get_id(obj->name);
}
- Smt2Worker(RTLIL::Module *module, bool bvmode, bool memmode, bool wiresmode, bool verbose) :
- ct(module->design), sigmap(module), module(module), bvmode(bvmode), memmode(memmode),
- wiresmode(wiresmode), verbose(verbose), idcounter(0)
+ void makebits(std::string name, int width = 0, std::string comment = std::string())
+ {
+ std::string decl_str;
+
+ if (statebv)
+ {
+ if (width == 0) {
+ decl_str = stringf("(define-fun |%s| ((state |%s_s|)) Bool (= ((_ extract %d %d) state) #b1))", name.c_str(), get_id(module), statebv_width, statebv_width);
+ statebv_width += 1;
+ } else {
+ decl_str = stringf("(define-fun |%s| ((state |%s_s|)) (_ BitVec %d) ((_ extract %d %d) state))", name.c_str(), get_id(module), width, statebv_width+width-1, statebv_width);
+ statebv_width += width;
+ }
+ }
+ else if (statedt)
+ {
+ if (width == 0) {
+ decl_str = stringf(" (|%s| Bool)", name.c_str());
+ } else {
+ decl_str = stringf(" (|%s| (_ BitVec %d))", name.c_str(), width);
+ }
+ }
+ else
+ {
+ if (width == 0) {
+ decl_str = stringf("(declare-fun |%s| (|%s_s|) Bool)", name.c_str(), get_id(module));
+ } else {
+ decl_str = stringf("(declare-fun |%s| (|%s_s|) (_ BitVec %d))", name.c_str(), get_id(module), width);
+ }
+ }
+
+ if (!comment.empty())
+ decl_str += " ; " + comment;
+
+ if (statedt)
+ dtmembers.push_back(decl_str + "\n");
+ else
+ decls.push_back(decl_str + "\n");
+ }
+
+ Smt2Worker(RTLIL::Module *module, bool bvmode, bool memmode, bool wiresmode, bool verbose, bool statebv, bool statedt, bool forallmode,
+ dict<IdString, int> &mod_stbv_width, dict<IdString, dict<IdString, pair<bool, bool>>> &mod_clk_cache) :
+ ct(module->design), sigmap(module), module(module), bvmode(bvmode), memmode(memmode), wiresmode(wiresmode),
+ verbose(verbose), statebv(statebv), statedt(statedt), forallmode(forallmode), mod_stbv_width(mod_stbv_width)
{
- decls.push_back(stringf("(declare-sort |%s_s| 0)\n", get_id(module)));
- decls.push_back(stringf("(declare-fun |%s_is| (|%s_s|) Bool)\n", get_id(module), get_id(module)));
+ pool<SigBit> noclock;
+
+ makebits(stringf("%s_is", get_id(module)));
for (auto cell : module->cells())
- for (auto &conn : cell->connections()) {
+ for (auto &conn : cell->connections())
+ {
+ if (GetSize(conn.second) == 0)
+ continue;
+
bool is_input = ct.cell_input(cell->type, conn.first);
bool is_output = ct.cell_output(cell->type, conn.first);
+
if (is_output && !is_input)
for (auto bit : sigmap(conn.second)) {
if (bit_driver.count(bit))
@@ -83,6 +134,66 @@ struct Smt2Worker
else if (is_output || !is_input)
log_error("Unsupported or unknown directionality on port %s of cell %s.%s (%s).\n",
log_id(conn.first), log_id(module), log_id(cell), log_id(cell->type));
+
+ if (cell->type.in("$mem") && conn.first.in("\\RD_CLK", "\\WR_CLK"))
+ {
+ SigSpec clk = sigmap(conn.second);
+ for (int i = 0; i < GetSize(clk); i++)
+ {
+ if (clk[i].wire == nullptr)
+ continue;
+
+ if (cell->getParam(conn.first == "\\RD_CLK" ? "\\RD_CLK_ENABLE" : "\\WR_CLK_ENABLE")[i] != State::S1)
+ continue;
+
+ if (cell->getParam(conn.first == "\\RD_CLK" ? "\\RD_CLK_POLARITY" : "\\WR_CLK_POLARITY")[i] == State::S1)
+ clock_posedge.insert(clk[i]);
+ else
+ clock_negedge.insert(clk[i]);
+ }
+ }
+ else
+ if (cell->type.in("$dff", "$_DFF_P_", "$_DFF_N_") && conn.first.in("\\CLK", "\\C"))
+ {
+ bool posedge = (cell->type == "$_DFF_N_") || (cell->type == "$dff" && cell->getParam("\\CLK_POLARITY").as_bool());
+ for (auto bit : sigmap(conn.second)) {
+ if (posedge)
+ clock_posedge.insert(bit);
+ else
+ clock_negedge.insert(bit);
+ }
+ }
+ else
+ if (mod_clk_cache.count(cell->type) && mod_clk_cache.at(cell->type).count(conn.first))
+ {
+ for (auto bit : sigmap(conn.second)) {
+ if (mod_clk_cache.at(cell->type).at(conn.first).first)
+ clock_posedge.insert(bit);
+ if (mod_clk_cache.at(cell->type).at(conn.first).second)
+ clock_negedge.insert(bit);
+ }
+ }
+ else
+ {
+ for (auto bit : sigmap(conn.second))
+ noclock.insert(bit);
+ }
+ }
+
+ for (auto bit : noclock) {
+ clock_posedge.erase(bit);
+ clock_negedge.erase(bit);
+ }
+
+ for (auto wire : module->wires())
+ {
+ if (!wire->port_input || GetSize(wire) != 1)
+ continue;
+ SigBit bit = sigmap(wire);
+ if (clock_posedge.count(bit))
+ mod_clk_cache[module->name][wire->name].first = true;
+ if (clock_negedge.count(bit))
+ mod_clk_cache[module->name][wire->name].second = true;
}
}
@@ -162,8 +273,7 @@ struct Smt2Worker
if (fcache.count(bit) == 0) {
if (verbose) log("%*s-> external bool: %s\n", 2+2*GetSize(recursive_cells), "",
log_signal(bit));
- decls.push_back(stringf("(declare-fun |%s#%d| (|%s_s|) Bool) ; %s\n",
- get_id(module), idcounter, get_id(module), log_signal(bit)));
+ makebits(stringf("%s#%d", get_id(module), idcounter), 0, log_signal(bit));
register_bool(bit, idcounter++);
}
@@ -237,8 +347,7 @@ struct Smt2Worker
log_signal(sig.extract(i, j)));
for (auto bit : sig.extract(i, j))
log_assert(bit_driver.count(bit) == 0);
- decls.push_back(stringf("(declare-fun |%s#%d| (|%s_s|) (_ BitVec %d)) ; %s\n",
- get_id(module), idcounter, get_id(module), j, log_signal(sig.extract(i, j))));
+ makebits(stringf("%s#%d", get_id(module), idcounter), j, log_signal(sig.extract(i, j)));
subexpr.push_back(stringf("(|%s#%d| %s)", get_id(module), idcounter, state_name));
register_bv(sig.extract(i, j), idcounter++);
}
@@ -288,7 +397,8 @@ struct Smt2Worker
if (type == 's' || type == 'd' || type == 'b') {
width = max(width, GetSize(cell->getPort("\\A")));
- width = max(width, GetSize(cell->getPort("\\B")));
+ if (cell->hasPort("\\B"))
+ width = max(width, GetSize(cell->getPort("\\B")));
}
if (cell->hasPort("\\A")) {
@@ -382,8 +492,7 @@ struct Smt2Worker
if (cell->type.in("$_FF_", "$_DFF_P_", "$_DFF_N_"))
{
registers.insert(cell);
- decls.push_back(stringf("(declare-fun |%s#%d| (|%s_s|) Bool) ; %s\n",
- get_id(module), idcounter, get_id(module), log_signal(cell->getPort("\\Q"))));
+ makebits(stringf("%s#%d", get_id(module), idcounter), 0, log_signal(cell->getPort("\\Q")));
register_bool(cell->getPort("\\Q"), idcounter++);
recursive_cells.erase(cell);
return;
@@ -397,6 +506,8 @@ struct Smt2Worker
if (cell->type == "$_NOR_") return export_gate(cell, "(not (or A B))");
if (cell->type == "$_XOR_") return export_gate(cell, "(xor A B)");
if (cell->type == "$_XNOR_") return export_gate(cell, "(not (xor A B))");
+ if (cell->type == "$_ANDNOT_") return export_gate(cell, "(and A (not B))");
+ if (cell->type == "$_ORNOT_") return export_gate(cell, "(or A (not B))");
if (cell->type == "$_MUX_") return export_gate(cell, "(ite S B A)");
if (cell->type == "$_AOI3_") return export_gate(cell, "(not (or (and A B) C))");
if (cell->type == "$_OAI3_") return export_gate(cell, "(not (and (or A B) C))");
@@ -410,20 +521,22 @@ struct Smt2Worker
if (cell->type.in("$ff", "$dff"))
{
registers.insert(cell);
- decls.push_back(stringf("(declare-fun |%s#%d| (|%s_s|) (_ BitVec %d)) ; %s\n",
- get_id(module), idcounter, get_id(module), GetSize(cell->getPort("\\Q")), log_signal(cell->getPort("\\Q"))));
+ makebits(stringf("%s#%d", get_id(module), idcounter), GetSize(cell->getPort("\\Q")), log_signal(cell->getPort("\\Q")));
register_bv(cell->getPort("\\Q"), idcounter++);
recursive_cells.erase(cell);
return;
}
- if (cell->type.in("$anyconst", "$anyseq"))
+ if (cell->type.in("$anyconst", "$anyseq", "$allconst", "$allseq"))
{
registers.insert(cell);
- decls.push_back(stringf("; yosys-smt2-%s %s#%d %s\n", cell->type.c_str() + 1, get_id(module), idcounter,
- cell->attributes.count("\\src") ? cell->attributes.at("\\src").decode_string().c_str() : get_id(cell)));
- decls.push_back(stringf("(declare-fun |%s#%d| (|%s_s|) (_ BitVec %d)) ; %s\n",
- get_id(module), idcounter, get_id(module), GetSize(cell->getPort("\\Y")), log_signal(cell->getPort("\\Y"))));
+ string infostr = cell->attributes.count("\\src") ? cell->attributes.at("\\src").decode_string().c_str() : get_id(cell);
+ if (cell->attributes.count("\\reg"))
+ infostr += " " + cell->attributes.at("\\reg").decode_string();
+ decls.push_back(stringf("; yosys-smt2-%s %s#%d %d %s\n", cell->type.c_str() + 1, get_id(module), idcounter, GetSize(cell->getPort("\\Y")), infostr.c_str()));
+ makebits(stringf("%s#%d", get_id(module), idcounter), GetSize(cell->getPort("\\Y")), log_signal(cell->getPort("\\Y")));
+ if (cell->type == "$anyseq")
+ ex_input_eq.push_back(stringf(" (= (|%s#%d| state) (|%s#%d| other_state))", get_id(module), idcounter, get_id(module), idcounter));
register_bv(cell->getPort("\\Y"), idcounter++);
recursive_cells.erase(cell);
return;
@@ -467,6 +580,13 @@ struct Smt2Worker
if (cell->type == "$div") return export_bvop(cell, "(bvUdiv A B)", 'd');
if (cell->type == "$mod") return export_bvop(cell, "(bvUrem A B)", 'd');
+ if (cell->type.in("$reduce_and", "$reduce_or", "$reduce_bool") &&
+ 2*GetSize(cell->getPort("\\A").chunks()) < GetSize(cell->getPort("\\A"))) {
+ bool is_and = cell->type == "$reduce_and";
+ string bits(GetSize(cell->getPort("\\A")), is_and ? '1' : '0');
+ return export_bvop(cell, stringf("(%s A #b%s)", is_and ? "=" : "distinct", bits.c_str()), 'b');
+ }
+
if (cell->type == "$reduce_and") return export_reduce(cell, "(and A)", true);
if (cell->type == "$reduce_or") return export_reduce(cell, "(or A)", false);
if (cell->type == "$reduce_xor") return export_reduce(cell, "(xor A)", false);
@@ -513,30 +633,97 @@ struct Smt2Worker
int abits = cell->getParam("\\ABITS").as_int();
int width = cell->getParam("\\WIDTH").as_int();
int rd_ports = cell->getParam("\\RD_PORTS").as_int();
+ int wr_ports = cell->getParam("\\WR_PORTS").as_int();
- decls.push_back(stringf("(declare-fun |%s#%d#0| (|%s_s|) (Array (_ BitVec %d) (_ BitVec %d))) ; %s\n",
- get_id(module), arrayid, get_id(module), abits, width, get_id(cell)));
+ bool async_read = false;
+ if (!cell->getParam("\\WR_CLK_ENABLE").is_fully_ones()) {
+ if (!cell->getParam("\\WR_CLK_ENABLE").is_fully_zero())
+ log_error("Memory %s.%s has mixed clocked/nonclocked write ports. This is not supported by \"write_smt2\".\n", log_id(cell), log_id(module));
+ async_read = true;
+ }
- decls.push_back(stringf("; yosys-smt2-memory %s %d %d %d\n", get_id(cell), abits, width, rd_ports));
- decls.push_back(stringf("(define-fun |%s_m %s| ((state |%s_s|)) (Array (_ BitVec %d) (_ BitVec %d)) (|%s#%d#0| state))\n",
- get_id(module), get_id(cell), get_id(module), abits, width, get_id(module), arrayid));
+ decls.push_back(stringf("; yosys-smt2-memory %s %d %d %d %d %s\n", get_id(cell), abits, width, rd_ports, wr_ports, async_read ? "async" : "sync"));
- for (int i = 0; i < rd_ports; i++)
+ string memstate;
+ if (async_read) {
+ memstate = stringf("%s#%d#final", get_id(module), arrayid);
+ } else {
+ memstate = stringf("%s#%d#0", get_id(module), arrayid);
+ }
+
+ if (statebv)
{
- SigSpec addr_sig = cell->getPort("\\RD_ADDR").extract(abits*i, abits);
- SigSpec data_sig = cell->getPort("\\RD_DATA").extract(width*i, width);
- std::string addr = get_bv(addr_sig);
+ int mem_size = cell->getParam("\\SIZE").as_int();
+ int mem_offset = cell->getParam("\\OFFSET").as_int();
+
+ makebits(memstate, width*mem_size, get_id(cell));
+ decls.push_back(stringf("(define-fun |%s_m %s| ((state |%s_s|)) (_ BitVec %d) (|%s| state))\n",
+ get_id(module), get_id(cell), get_id(module), width*mem_size, memstate.c_str()));
+
+ for (int i = 0; i < rd_ports; i++)
+ {
+ SigSpec addr_sig = cell->getPort("\\RD_ADDR").extract(abits*i, abits);
+ SigSpec data_sig = cell->getPort("\\RD_DATA").extract(width*i, width);
+ std::string addr = get_bv(addr_sig);
+
+ if (cell->getParam("\\RD_CLK_ENABLE").extract(i).as_bool())
+ log_error("Read port %d (%s) of memory %s.%s is clocked. This is not supported by \"write_smt2\"! "
+ "Call \"memory\" with -nordff to avoid this error.\n", i, log_signal(data_sig), log_id(cell), log_id(module));
+
+ decls.push_back(stringf("(define-fun |%s_m:R%dA %s| ((state |%s_s|)) (_ BitVec %d) %s) ; %s\n",
+ get_id(module), i, get_id(cell), get_id(module), abits, addr.c_str(), log_signal(addr_sig)));
- if (cell->getParam("\\RD_CLK_ENABLE").extract(i).as_bool())
- log_error("Read port %d (%s) of memory %s.%s is clocked. This is not supported by \"write_smt2\"! "
- "Call \"memory\" with -nordff to avoid this error.\n", i, log_signal(data_sig), log_id(cell), log_id(module));
+ std::string read_expr = "#b";
+ for (int k = 0; k < width; k++)
+ read_expr += "0";
- decls.push_back(stringf("(define-fun |%s_m:%d %s| ((state |%s_s|)) (_ BitVec %d) %s) ; %s\n",
- get_id(module), i, get_id(cell), get_id(module), abits, addr.c_str(), log_signal(addr_sig)));
+ for (int k = 0; k < mem_size; k++)
+ read_expr = stringf("(ite (= (|%s_m:R%dA %s| state) #b%s) ((_ extract %d %d) (|%s| state))\n %s)",
+ get_id(module), i, get_id(cell), Const(k+mem_offset, abits).as_string().c_str(),
+ width*(k+1)-1, width*k, memstate.c_str(), read_expr.c_str());
- decls.push_back(stringf("(define-fun |%s#%d| ((state |%s_s|)) (_ BitVec %d) (select (|%s#%d#0| state) %s)) ; %s\n",
- get_id(module), idcounter, get_id(module), width, get_id(module), arrayid, addr.c_str(), log_signal(data_sig)));
- register_bv(data_sig, idcounter++);
+ decls.push_back(stringf("(define-fun |%s#%d| ((state |%s_s|)) (_ BitVec %d)\n %s) ; %s\n",
+ get_id(module), idcounter, get_id(module), width, read_expr.c_str(), log_signal(data_sig)));
+
+ decls.push_back(stringf("(define-fun |%s_m:R%dD %s| ((state |%s_s|)) (_ BitVec %d) (|%s#%d| state))\n",
+ get_id(module), i, get_id(cell), get_id(module), width, get_id(module), idcounter));
+
+ register_bv(data_sig, idcounter++);
+ }
+ }
+ else
+ {
+ if (statedt)
+ dtmembers.push_back(stringf(" (|%s| (Array (_ BitVec %d) (_ BitVec %d))) ; %s\n",
+ memstate.c_str(), abits, width, get_id(cell)));
+ else
+ decls.push_back(stringf("(declare-fun |%s| (|%s_s|) (Array (_ BitVec %d) (_ BitVec %d))) ; %s\n",
+ memstate.c_str(), get_id(module), abits, width, get_id(cell)));
+
+ decls.push_back(stringf("(define-fun |%s_m %s| ((state |%s_s|)) (Array (_ BitVec %d) (_ BitVec %d)) (|%s| state))\n",
+ get_id(module), get_id(cell), get_id(module), abits, width, memstate.c_str()));
+
+ for (int i = 0; i < rd_ports; i++)
+ {
+ SigSpec addr_sig = cell->getPort("\\RD_ADDR").extract(abits*i, abits);
+ SigSpec data_sig = cell->getPort("\\RD_DATA").extract(width*i, width);
+ std::string addr = get_bv(addr_sig);
+
+ if (cell->getParam("\\RD_CLK_ENABLE").extract(i).as_bool())
+ log_error("Read port %d (%s) of memory %s.%s is clocked. This is not supported by \"write_smt2\"! "
+ "Call \"memory\" with -nordff to avoid this error.\n", i, log_signal(data_sig), log_id(cell), log_id(module));
+
+ decls.push_back(stringf("(define-fun |%s_m:R%dA %s| ((state |%s_s|)) (_ BitVec %d) %s) ; %s\n",
+ get_id(module), i, get_id(cell), get_id(module), abits, addr.c_str(), log_signal(addr_sig)));
+
+ decls.push_back(stringf("(define-fun |%s#%d| ((state |%s_s|)) (_ BitVec %d) (select (|%s| state) (|%s_m:R%dA %s| state))) ; %s\n",
+ get_id(module), idcounter, get_id(module), width, memstate.c_str(), get_id(module), i, get_id(cell), log_signal(data_sig)));
+
+ decls.push_back(stringf("(define-fun |%s_m:R%dD %s| ((state |%s_s|)) (_ BitVec %d) (|%s#%d| state))\n",
+ get_id(module), i, get_id(cell), get_id(module), width, get_id(module), idcounter));
+
+ register_bv(data_sig, idcounter++);
+ }
}
registers.insert(cell);
@@ -553,32 +740,38 @@ struct Smt2Worker
for (auto &conn : cell->connections())
{
+ if (GetSize(conn.second) == 0)
+ continue;
+
Wire *w = m->wire(conn.first);
SigSpec sig = sigmap(conn.second);
if (w->port_output && !w->port_input) {
if (GetSize(w) > 1) {
if (bvmode) {
- decls.push_back(stringf("(declare-fun |%s#%d| (|%s_s|) (_ BitVec %d)) ; %s\n",
- get_id(module), idcounter, get_id(module), GetSize(w), log_signal(sig)));
+ makebits(stringf("%s#%d", get_id(module), idcounter), GetSize(w), log_signal(sig));
register_bv(sig, idcounter++);
} else {
for (int i = 0; i < GetSize(w); i++) {
- decls.push_back(stringf("(declare-fun |%s#%d| (|%s_s|) Bool) ; %s\n",
- get_id(module), idcounter, get_id(module), log_signal(sig[i])));
+ makebits(stringf("%s#%d", get_id(module), idcounter), 0, log_signal(sig[i]));
register_bool(sig[i], idcounter++);
}
}
} else {
- decls.push_back(stringf("(declare-fun |%s#%d| (|%s_s|) Bool) ; %s\n",
- get_id(module), idcounter, get_id(module), log_signal(sig)));
+ makebits(stringf("%s#%d", get_id(module), idcounter), 0, log_signal(sig));
register_bool(sig, idcounter++);
}
}
}
- decls.push_back(stringf("(declare-fun |%s_h %s| (|%s_s|) |%s_s|)\n",
- get_id(module), get_id(cell->name), get_id(module), get_id(cell->type)));
+ if (statebv)
+ makebits(stringf("%s_h %s", get_id(module), get_id(cell->name)), mod_stbv_width.at(cell->type));
+ else if (statedt)
+ dtmembers.push_back(stringf(" (|%s_h %s| |%s_s|)\n",
+ get_id(module), get_id(cell->name), get_id(cell->type)));
+ else
+ decls.push_back(stringf("(declare-fun |%s_h %s| (|%s_s|) |%s_s|)\n",
+ get_id(module), get_id(cell->name), get_id(module), get_id(cell->type)));
hiercells.insert(cell);
hiercells_queue.insert(cell);
@@ -617,17 +810,30 @@ struct Smt2Worker
decls.push_back(stringf("; yosys-smt2-register %s %d\n", get_id(wire), wire->width));
if (wire->get_bool_attribute("\\keep") || (wiresmode && wire->name[0] == '\\'))
decls.push_back(stringf("; yosys-smt2-wire %s %d\n", get_id(wire), wire->width));
+ if (GetSize(wire) == 1 && (clock_posedge.count(sig) || clock_negedge.count(sig)))
+ decls.push_back(stringf("; yosys-smt2-clock %s%s%s\n", get_id(wire),
+ clock_posedge.count(sig) ? " posedge" : "", clock_negedge.count(sig) ? " negedge" : ""));
if (bvmode && GetSize(sig) > 1) {
decls.push_back(stringf("(define-fun |%s_n %s| ((state |%s_s|)) (_ BitVec %d) %s)\n",
get_id(module), get_id(wire), get_id(module), GetSize(sig), get_bv(sig).c_str()));
+ if (wire->port_input)
+ ex_input_eq.push_back(stringf(" (= (|%s_n %s| state) (|%s_n %s| other_state))",
+ get_id(module), get_id(wire), get_id(module), get_id(wire)));
} else {
for (int i = 0; i < GetSize(sig); i++)
- if (GetSize(sig) > 1)
+ if (GetSize(sig) > 1) {
decls.push_back(stringf("(define-fun |%s_n %s %d| ((state |%s_s|)) Bool %s)\n",
get_id(module), get_id(wire), i, get_id(module), get_bool(sig[i]).c_str()));
- else
+ if (wire->port_input)
+ ex_input_eq.push_back(stringf(" (= (|%s_n %s %d| state) (|%s_n %s %d| other_state))",
+ get_id(module), get_id(wire), i, get_id(module), get_id(wire), i));
+ } else {
decls.push_back(stringf("(define-fun |%s_n %s| ((state |%s_s|)) Bool %s)\n",
get_id(module), get_id(wire), get_id(module), get_bool(sig[i]).c_str()));
+ if (wire->port_input)
+ ex_input_eq.push_back(stringf(" (= (|%s_n %s| state) (|%s_n %s| other_state))",
+ get_id(module), get_id(wire), get_id(module), get_id(wire)));
+ }
}
}
}
@@ -639,31 +845,104 @@ struct Smt2Worker
if (wire->attributes.count("\\init")) {
RTLIL::SigSpec sig = sigmap(wire);
Const val = wire->attributes.at("\\init");
- val.bits.resize(GetSize(sig));
+ val.bits.resize(GetSize(sig), State::Sx);
if (bvmode && GetSize(sig) > 1) {
- init_list.push_back(stringf("(= %s #b%s) ; %s", get_bv(sig).c_str(), val.as_string().c_str(), get_id(wire)));
+ Const mask(State::S1, GetSize(sig));
+ bool use_mask = false;
+ for (int i = 0; i < GetSize(sig); i++)
+ if (val[i] != State::S0 && val[i] != State::S1) {
+ val[i] = State::S0;
+ mask[i] = State::S0;
+ use_mask = true;
+ }
+ if (use_mask)
+ init_list.push_back(stringf("(= (bvand %s #b%s) #b%s) ; %s", get_bv(sig).c_str(), mask.as_string().c_str(), val.as_string().c_str(), get_id(wire)));
+ else
+ init_list.push_back(stringf("(= %s #b%s) ; %s", get_bv(sig).c_str(), val.as_string().c_str(), get_id(wire)));
} else {
for (int i = 0; i < GetSize(sig); i++)
- init_list.push_back(stringf("(= %s %s) ; %s", get_bool(sig[i]).c_str(), val.bits[i] == State::S1 ? "true" : "false", get_id(wire)));
+ if (val[i] == State::S0 || val[i] == State::S1)
+ init_list.push_back(stringf("(= %s %s) ; %s", get_bool(sig[i]).c_str(), val[i] == State::S1 ? "true" : "false", get_id(wire)));
}
}
if (verbose) log("=> export logic driving asserts\n");
- vector<string> assert_list, assume_list;
+ int assert_id = 0, assume_id = 0, cover_id = 0;
+ vector<string> assert_list, assume_list, cover_list;
+
for (auto cell : module->cells())
- if (cell->type.in("$assert", "$assume")) {
+ {
+ if (cell->type.in("$assert", "$assume", "$cover"))
+ {
+ int &id = cell->type == "$assert" ? assert_id :
+ cell->type == "$assume" ? assume_id :
+ cell->type == "$cover" ? cover_id : *(int*)nullptr;
+
+ char postfix = cell->type == "$assert" ? 'a' :
+ cell->type == "$assume" ? 'u' :
+ cell->type == "$cover" ? 'c' : 0;
+
string name_a = get_bool(cell->getPort("\\A"));
string name_en = get_bool(cell->getPort("\\EN"));
- decls.push_back(stringf("; yosys-smt2-%s %s#%d %s\n", cell->type.c_str() + 1, get_id(module), idcounter,
+ decls.push_back(stringf("; yosys-smt2-%s %d %s\n", cell->type.c_str() + 1, id,
cell->attributes.count("\\src") ? cell->attributes.at("\\src").decode_string().c_str() : get_id(cell)));
- decls.push_back(stringf("(define-fun |%s#%d| ((state |%s_s|)) Bool (or %s (not %s))) ; %s\n",
- get_id(module), idcounter, get_id(module), name_a.c_str(), name_en.c_str(), get_id(cell)));
- if (cell->type == "$assert")
- assert_list.push_back(stringf("(|%s#%d| state)", get_id(module), idcounter++));
+
+ if (cell->type == "$cover")
+ decls.push_back(stringf("(define-fun |%s_%c %d| ((state |%s_s|)) Bool (and %s %s)) ; %s\n",
+ get_id(module), postfix, id, get_id(module), name_a.c_str(), name_en.c_str(), get_id(cell)));
else
- assume_list.push_back(stringf("(|%s#%d| state)", get_id(module), idcounter++));
+ decls.push_back(stringf("(define-fun |%s_%c %d| ((state |%s_s|)) Bool (or %s (not %s))) ; %s\n",
+ get_id(module), postfix, id, get_id(module), name_a.c_str(), name_en.c_str(), get_id(cell)));
+
+ if (cell->type == "$assert")
+ assert_list.push_back(stringf("(|%s_a %d| state)", get_id(module), id));
+ else if (cell->type == "$assume")
+ assume_list.push_back(stringf("(|%s_u %d| state)", get_id(module), id));
+
+ id++;
}
+ }
+
+ if (verbose) log("=> export logic driving hierarchical cells\n");
+
+ for (auto cell : module->cells())
+ if (module->design->module(cell->type) != nullptr)
+ export_cell(cell);
+
+ while (!hiercells_queue.empty())
+ {
+ std::set<RTLIL::Cell*> queue;
+ queue.swap(hiercells_queue);
+
+ for (auto cell : queue)
+ {
+ string cell_state = stringf("(|%s_h %s| state)", get_id(module), get_id(cell->name));
+ Module *m = module->design->module(cell->type);
+ log_assert(m != nullptr);
+
+ hier.push_back(stringf(" (= (|%s_is| state) (|%s_is| %s))\n",
+ get_id(module), get_id(cell->type), cell_state.c_str()));
+
+ for (auto &conn : cell->connections())
+ {
+ if (GetSize(conn.second) == 0)
+ continue;
+
+ Wire *w = m->wire(conn.first);
+ SigSpec sig = sigmap(conn.second);
+
+ if (bvmode || GetSize(w) == 1) {
+ hier.push_back(stringf(" (= %s (|%s_n %s| %s)) ; %s.%s\n", (GetSize(w) > 1 ? get_bv(sig) : get_bool(sig)).c_str(),
+ get_id(cell->type), get_id(w), cell_state.c_str(), get_id(cell->type), get_id(w)));
+ } else {
+ for (int i = 0; i < GetSize(w); i++)
+ hier.push_back(stringf(" (= %s (|%s_n %s %d| %s)) ; %s.%s[%d]\n", get_bool(sig[i]).c_str(),
+ get_id(cell->type), get_id(w), i, cell_state.c_str(), get_id(cell->type), get_id(w), i));
+ }
+ }
+ }
+ }
for (int iter = 1; !registers.empty(); iter++)
{
@@ -679,6 +958,7 @@ struct Smt2Worker
std::string expr_d = get_bool(cell->getPort("\\D"));
std::string expr_q = get_bool(cell->getPort("\\Q"), "next_state");
trans.push_back(stringf(" (= %s %s) ; %s %s\n", expr_d.c_str(), expr_q.c_str(), get_id(cell), log_signal(cell->getPort("\\Q"))));
+ ex_state_eq.push_back(stringf("(= %s %s)", get_bool(cell->getPort("\\Q")).c_str(), get_bool(cell->getPort("\\Q"), "other_state").c_str()));
}
if (cell->type.in("$ff", "$dff"))
@@ -686,13 +966,16 @@ struct Smt2Worker
std::string expr_d = get_bv(cell->getPort("\\D"));
std::string expr_q = get_bv(cell->getPort("\\Q"), "next_state");
trans.push_back(stringf(" (= %s %s) ; %s %s\n", expr_d.c_str(), expr_q.c_str(), get_id(cell), log_signal(cell->getPort("\\Q"))));
+ ex_state_eq.push_back(stringf("(= %s %s)", get_bv(cell->getPort("\\Q")).c_str(), get_bv(cell->getPort("\\Q"), "other_state").c_str()));
}
- if (cell->type == "$anyconst")
+ if (cell->type.in("$anyconst", "$allconst"))
{
std::string expr_d = get_bv(cell->getPort("\\Y"));
std::string expr_q = get_bv(cell->getPort("\\Y"), "next_state");
trans.push_back(stringf(" (= %s %s) ; %s %s\n", expr_d.c_str(), expr_q.c_str(), get_id(cell), log_signal(cell->getPort("\\Y"))));
+ if (cell->type == "$anyconst")
+ ex_state_eq.push_back(stringf("(= %s %s)", get_bv(cell->getPort("\\Y")).c_str(), get_bv(cell->getPort("\\Y"), "other_state").c_str()));
}
if (cell->type == "$mem")
@@ -703,24 +986,111 @@ struct Smt2Worker
int width = cell->getParam("\\WIDTH").as_int();
int wr_ports = cell->getParam("\\WR_PORTS").as_int();
- for (int i = 0; i < wr_ports; i++)
+ bool async_read = false;
+ string initial_memstate, final_memstate;
+
+ if (!cell->getParam("\\WR_CLK_ENABLE").is_fully_ones()) {
+ log_assert(cell->getParam("\\WR_CLK_ENABLE").is_fully_zero());
+ async_read = true;
+ initial_memstate = stringf("%s#%d#0", get_id(module), arrayid);
+ final_memstate = stringf("%s#%d#final", get_id(module), arrayid);
+ }
+
+ if (statebv)
+ {
+ int mem_size = cell->getParam("\\SIZE").as_int();
+ int mem_offset = cell->getParam("\\OFFSET").as_int();
+
+ if (async_read) {
+ makebits(final_memstate, width*mem_size, get_id(cell));
+ }
+
+ for (int i = 0; i < wr_ports; i++)
+ {
+ SigSpec addr_sig = cell->getPort("\\WR_ADDR").extract(abits*i, abits);
+ SigSpec data_sig = cell->getPort("\\WR_DATA").extract(width*i, width);
+ SigSpec mask_sig = cell->getPort("\\WR_EN").extract(width*i, width);
+
+ std::string addr = get_bv(addr_sig);
+ std::string data = get_bv(data_sig);
+ std::string mask = get_bv(mask_sig);
+
+ decls.push_back(stringf("(define-fun |%s_m:W%dA %s| ((state |%s_s|)) (_ BitVec %d) %s) ; %s\n",
+ get_id(module), i, get_id(cell), get_id(module), abits, addr.c_str(), log_signal(addr_sig)));
+ addr = stringf("(|%s_m:W%dA %s| state)", get_id(module), i, get_id(cell));
+
+ decls.push_back(stringf("(define-fun |%s_m:W%dD %s| ((state |%s_s|)) (_ BitVec %d) %s) ; %s\n",
+ get_id(module), i, get_id(cell), get_id(module), width, data.c_str(), log_signal(data_sig)));
+ data = stringf("(|%s_m:W%dD %s| state)", get_id(module), i, get_id(cell));
+
+ decls.push_back(stringf("(define-fun |%s_m:W%dM %s| ((state |%s_s|)) (_ BitVec %d) %s) ; %s\n",
+ get_id(module), i, get_id(cell), get_id(module), width, mask.c_str(), log_signal(mask_sig)));
+ mask = stringf("(|%s_m:W%dM %s| state)", get_id(module), i, get_id(cell));
+
+ std::string data_expr;
+
+ for (int k = mem_size-1; k >= 0; k--) {
+ std::string new_data = stringf("(bvor (bvand %s %s) (bvand ((_ extract %d %d) (|%s#%d#%d| state)) (bvnot %s)))",
+ data.c_str(), mask.c_str(), width*(k+1)-1, width*k, get_id(module), arrayid, i, mask.c_str());
+ data_expr += stringf("\n (ite (= %s #b%s) %s ((_ extract %d %d) (|%s#%d#%d| state)))",
+ addr.c_str(), Const(k+mem_offset, abits).as_string().c_str(), new_data.c_str(),
+ width*(k+1)-1, width*k, get_id(module), arrayid, i);
+ }
+
+ decls.push_back(stringf("(define-fun |%s#%d#%d| ((state |%s_s|)) (_ BitVec %d) (concat%s)) ; %s\n",
+ get_id(module), arrayid, i+1, get_id(module), width*mem_size, data_expr.c_str(), get_id(cell)));
+ }
+ }
+ else
{
- std::string addr = get_bv(cell->getPort("\\WR_ADDR").extract(abits*i, abits));
- std::string data = get_bv(cell->getPort("\\WR_DATA").extract(width*i, width));
- std::string mask = get_bv(cell->getPort("\\WR_EN").extract(width*i, width));
+ if (async_read) {
+ if (statedt)
+ dtmembers.push_back(stringf(" (|%s| (Array (_ BitVec %d) (_ BitVec %d))) ; %s\n",
+ initial_memstate.c_str(), abits, width, get_id(cell)));
+ else
+ decls.push_back(stringf("(declare-fun |%s| (|%s_s|) (Array (_ BitVec %d) (_ BitVec %d))) ; %s\n",
+ initial_memstate.c_str(), get_id(module), abits, width, get_id(cell)));
+ }
+
+ for (int i = 0; i < wr_ports; i++)
+ {
+ SigSpec addr_sig = cell->getPort("\\WR_ADDR").extract(abits*i, abits);
+ SigSpec data_sig = cell->getPort("\\WR_DATA").extract(width*i, width);
+ SigSpec mask_sig = cell->getPort("\\WR_EN").extract(width*i, width);
+
+ std::string addr = get_bv(addr_sig);
+ std::string data = get_bv(data_sig);
+ std::string mask = get_bv(mask_sig);
+
+ decls.push_back(stringf("(define-fun |%s_m:W%dA %s| ((state |%s_s|)) (_ BitVec %d) %s) ; %s\n",
+ get_id(module), i, get_id(cell), get_id(module), abits, addr.c_str(), log_signal(addr_sig)));
+ addr = stringf("(|%s_m:W%dA %s| state)", get_id(module), i, get_id(cell));
+
+ decls.push_back(stringf("(define-fun |%s_m:W%dD %s| ((state |%s_s|)) (_ BitVec %d) %s) ; %s\n",
+ get_id(module), i, get_id(cell), get_id(module), width, data.c_str(), log_signal(data_sig)));
+ data = stringf("(|%s_m:W%dD %s| state)", get_id(module), i, get_id(cell));
+
+ decls.push_back(stringf("(define-fun |%s_m:W%dM %s| ((state |%s_s|)) (_ BitVec %d) %s) ; %s\n",
+ get_id(module), i, get_id(cell), get_id(module), width, mask.c_str(), log_signal(mask_sig)));
+ mask = stringf("(|%s_m:W%dM %s| state)", get_id(module), i, get_id(cell));
- data = stringf("(bvor (bvand %s %s) (bvand (select (|%s#%d#%d| state) %s) (bvnot %s)))",
- data.c_str(), mask.c_str(), get_id(module), arrayid, i, addr.c_str(), mask.c_str());
+ data = stringf("(bvor (bvand %s %s) (bvand (select (|%s#%d#%d| state) %s) (bvnot %s)))",
+ data.c_str(), mask.c_str(), get_id(module), arrayid, i, addr.c_str(), mask.c_str());
- decls.push_back(stringf("(define-fun |%s#%d#%d| ((state |%s_s|)) (Array (_ BitVec %d) (_ BitVec %d)) "
- "(store (|%s#%d#%d| state) %s %s)) ; %s\n",
- get_id(module), arrayid, i+1, get_id(module), abits, width,
- get_id(module), arrayid, i, addr.c_str(), data.c_str(), get_id(cell)));
+ decls.push_back(stringf("(define-fun |%s#%d#%d| ((state |%s_s|)) (Array (_ BitVec %d) (_ BitVec %d)) "
+ "(store (|%s#%d#%d| state) %s %s)) ; %s\n",
+ get_id(module), arrayid, i+1, get_id(module), abits, width,
+ get_id(module), arrayid, i, addr.c_str(), data.c_str(), get_id(cell)));
+ }
}
std::string expr_d = stringf("(|%s#%d#%d| state)", get_id(module), arrayid, wr_ports);
std::string expr_q = stringf("(|%s#%d#0| next_state)", get_id(module), arrayid);
trans.push_back(stringf(" (= %s %s) ; %s\n", expr_d.c_str(), expr_q.c_str(), get_id(cell)));
+ ex_state_eq.push_back(stringf("(= (|%s#%d#0| state) (|%s#%d#0| other_state))", get_id(module), arrayid, get_id(module), arrayid));
+
+ if (async_read)
+ hier.push_back(stringf(" (= %s (|%s| state)) ; %s\n", expr_d.c_str(), final_memstate.c_str(), get_id(cell)));
Const init_data = cell->getParam("\\INIT");
int memsize = cell->getParam("\\SIZE").as_int();
@@ -737,46 +1107,20 @@ struct Smt2Worker
if (bit == State::S0 || bit == State::S1)
gen_init_constr = true;
- if (gen_init_constr) {
- init_list.push_back(stringf("(= (select (|%s#%d#0| state) #b%s) #b%s) ; %s[%d]",
- get_id(module), arrayid, Const(i, abits).as_string().c_str(),
- initword.as_string().c_str(), get_id(cell), i));
+ if (gen_init_constr)
+ {
+ if (statebv)
+ /* FIXME */;
+ else
+ init_list.push_back(stringf("(= (select (|%s#%d#0| state) #b%s) #b%s) ; %s[%d]",
+ get_id(module), arrayid, Const(i, abits).as_string().c_str(),
+ initword.as_string().c_str(), get_id(cell), i));
}
}
}
}
}
- if (verbose) log("=> export logic driving hierarchical cells\n");
-
- while (!hiercells_queue.empty())
- {
- std::set<RTLIL::Cell*> queue;
- queue.swap(hiercells_queue);
-
- for (auto cell : queue)
- {
- string cell_state = stringf("(|%s_h %s| state)", get_id(module), get_id(cell->name));
- Module *m = module->design->module(cell->type);
- log_assert(m != nullptr);
-
- for (auto &conn : cell->connections())
- {
- Wire *w = m->wire(conn.first);
- SigSpec sig = sigmap(conn.second);
-
- if (bvmode || GetSize(w) == 1) {
- hier.push_back(stringf(" (= %s (|%s_n %s| %s)) ; %s.%s\n", (GetSize(w) > 1 ? get_bv(sig) : get_bool(sig)).c_str(),
- get_id(cell->type), get_id(w), cell_state.c_str(), get_id(cell->type), get_id(w)));
- } else {
- for (int i = 0; i < GetSize(w); i++)
- hier.push_back(stringf(" (= %s (|%s_n %s %d| %s)) ; %s.%s[%d]\n", get_bool(sig[i]).c_str(),
- get_id(cell->type), get_id(w), i, cell_state.c_str(), get_id(cell->type), get_id(w), i));
- }
- }
- }
- }
-
if (verbose) log("=> finalizing SMT2 representation of %s.\n", log_id(module));
for (auto c : hiercells) {
@@ -786,6 +1130,37 @@ struct Smt2Worker
hier.push_back(stringf(" (|%s_h| (|%s_h %s| state))\n", get_id(c->type), get_id(module), get_id(c->name)));
trans.push_back(stringf(" (|%s_t| (|%s_h %s| state) (|%s_h %s| next_state))\n",
get_id(c->type), get_id(module), get_id(c->name), get_id(module), get_id(c->name)));
+ ex_state_eq.push_back(stringf("(|%s_ex_state_eq| (|%s_h %s| state) (|%s_h %s| other_state))\n",
+ get_id(c->type), get_id(module), get_id(c->name), get_id(module), get_id(c->name)));
+ }
+
+ if (forallmode)
+ {
+ string expr = ex_state_eq.empty() ? "true" : "(and";
+ if (!ex_state_eq.empty()) {
+ if (GetSize(ex_state_eq) == 1) {
+ expr = "\n " + ex_state_eq.front() + "\n";
+ } else {
+ for (auto &str : ex_state_eq)
+ expr += stringf("\n %s", str.c_str());
+ expr += "\n)";
+ }
+ }
+ decls.push_back(stringf("(define-fun |%s_ex_state_eq| ((state |%s_s|) (other_state |%s_s|)) Bool %s)\n",
+ get_id(module), get_id(module), get_id(module), expr.c_str()));
+
+ expr = ex_input_eq.empty() ? "true" : "(and";
+ if (!ex_input_eq.empty()) {
+ if (GetSize(ex_input_eq) == 1) {
+ expr = "\n " + ex_input_eq.front() + "\n";
+ } else {
+ for (auto &str : ex_input_eq)
+ expr += stringf("\n %s", str.c_str());
+ expr += "\n)";
+ }
+ }
+ decls.push_back(stringf("(define-fun |%s_ex_input_eq| ((state |%s_s|) (other_state |%s_s|)) Bool %s)\n",
+ get_id(module), get_id(module), get_id(module), expr.c_str()));
}
string assert_expr = assert_list.empty() ? "true" : "(and";
@@ -832,6 +1207,18 @@ struct Smt2Worker
{
f << stringf("; yosys-smt2-module %s\n", get_id(module));
+ if (statebv) {
+ f << stringf("(define-sort |%s_s| () (_ BitVec %d))\n", get_id(module), statebv_width);
+ mod_stbv_width[module->name] = statebv_width;
+ } else
+ if (statedt) {
+ f << stringf("(declare-datatype |%s_s| ((|%s_mk|\n", get_id(module), get_id(module));
+ for (auto it : dtmembers)
+ f << it;
+ f << stringf(")))\n");
+ } else
+ f << stringf("(declare-sort |%s_s| 0)\n", get_id(module));
+
for (auto it : decls)
f << it;
@@ -864,44 +1251,92 @@ struct Smt2Worker
struct Smt2Backend : public Backend {
Smt2Backend() : Backend("smt2", "write design to SMT-LIBv2 file") { }
- virtual void help()
+ void help() YS_OVERRIDE
{
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
log("\n");
log(" write_smt2 [options] [filename]\n");
log("\n");
log("Write a SMT-LIBv2 [1] description of the current design. For a module with name\n");
- log("'<mod>' this will declare the sort '<mod>_s' (state of the module) and the\n");
- log("functions operating on that state.\n");
+ log("'<mod>' this will declare the sort '<mod>_s' (state of the module) and will\n");
+ log("define and declare functions operating on that state.\n");
+ log("\n");
+ log("The following SMT2 functions are generated for a module with name '<mod>'.\n");
+ log("Some declarations/definitions are printed with a special comment. A prover\n");
+ log("using the SMT2 files can use those comments to collect all relevant metadata\n");
+ log("about the design.\n");
+ log("\n");
+ log(" ; yosys-smt2-module <mod>\n");
+ log(" (declare-sort |<mod>_s| 0)\n");
+ log(" The sort representing a state of module <mod>.\n");
+ log("\n");
+ log(" (define-fun |<mod>_h| ((state |<mod>_s|)) Bool (...))\n");
+ log(" This function must be asserted for each state to establish the\n");
+ log(" design hierarchy.\n");
+ log("\n");
+ log(" ; yosys-smt2-input <wirename> <width>\n");
+ log(" ; yosys-smt2-output <wirename> <width>\n");
+ log(" ; yosys-smt2-register <wirename> <width>\n");
+ log(" ; yosys-smt2-wire <wirename> <width>\n");
+ log(" (define-fun |<mod>_n <wirename>| (|<mod>_s|) (_ BitVec <width>))\n");
+ log(" (define-fun |<mod>_n <wirename>| (|<mod>_s|) Bool)\n");
+ log(" For each port, register, and wire with the 'keep' attribute set an\n");
+ log(" accessor function is generated. Single-bit wires are returned as Bool,\n");
+ log(" multi-bit wires as BitVec.\n");
+ log("\n");
+ log(" ; yosys-smt2-cell <submod> <instancename>\n");
+ log(" (declare-fun |<mod>_h <instancename>| (|<mod>_s|) |<submod>_s|)\n");
+ log(" There is a function like that for each hierarchical instance. It\n");
+ log(" returns the sort that represents the state of the sub-module that\n");
+ log(" implements the instance.\n");
+ log("\n");
+ log(" (declare-fun |<mod>_is| (|<mod>_s|) Bool)\n");
+ log(" This function must be asserted 'true' for initial states, and 'false'\n");
+ log(" otherwise.\n");
+ log("\n");
+ log(" (define-fun |<mod>_i| ((state |<mod>_s|)) Bool (...))\n");
+ log(" This function must be asserted 'true' for initial states. For\n");
+ log(" non-initial states it must be left unconstrained.\n");
log("\n");
- log("The '<mod>_s' sort represents a module state. Additional '<mod>_n' functions\n");
- log("are provided that can be used to access the values of the signals in the module.\n");
- log("By default only ports, registers, and wires with the 'keep' attribute set are\n");
- log("made available via such functions. With the -nobv option, multi-bit wires are\n");
- log("exported as separate functions of type Bool for the individual bits. Without\n");
- log("-nobv multi-bit wires are exported as single functions of type BitVec.\n");
+ log(" (define-fun |<mod>_t| ((state |<mod>_s|) (next_state |<mod>_s|)) Bool (...))\n");
+ log(" This function evaluates to 'true' if the states 'state' and\n");
+ log(" 'next_state' form a valid state transition.\n");
log("\n");
- log("The '<mod>_t' function evaluates to 'true' when the given pair of states\n");
- log("describes a valid state transition.\n");
+ log(" (define-fun |<mod>_a| ((state |<mod>_s|)) Bool (...))\n");
+ log(" This function evaluates to 'true' if all assertions hold in the state.\n");
log("\n");
- log("The '<mod>_a' function evaluates to 'true' when the given state satisfies\n");
- log("the asserts in the module.\n");
+ log(" (define-fun |<mod>_u| ((state |<mod>_s|)) Bool (...))\n");
+ log(" This function evaluates to 'true' if all assumptions hold in the state.\n");
log("\n");
- log("The '<mod>_u' function evaluates to 'true' when the given state satisfies\n");
- log("the assumptions in the module.\n");
+ log(" ; yosys-smt2-assert <id> <filename:linenum>\n");
+ log(" (define-fun |<mod>_a <id>| ((state |<mod>_s|)) Bool (...))\n");
+ log(" Each $assert cell is converted into one of this functions. The function\n");
+ log(" evaluates to 'true' if the assert statement holds in the state.\n");
log("\n");
- log("The '<mod>_i' function evaluates to 'true' when the given state conforms\n");
- log("to the initial state. Furthermore the '<mod>_is' function should be asserted\n");
- log("to be true for initial states in addition to '<mod>_i', and should be\n");
- log("asserted to be false for non-initial states.\n");
+ log(" ; yosys-smt2-assume <id> <filename:linenum>\n");
+ log(" (define-fun |<mod>_u <id>| ((state |<mod>_s|)) Bool (...))\n");
+ log(" Each $assume cell is converted into one of this functions. The function\n");
+ log(" evaluates to 'true' if the assume statement holds in the state.\n");
log("\n");
- log("For hierarchical designs, the '<mod>_h' function must be asserted for each\n");
- log("state to establish the design hierarchy. The '<mod>_h <cellname>' function\n");
- log("evaluates to the state corresponding to the given cell within <mod>.\n");
+ log(" ; yosys-smt2-cover <id> <filename:linenum>\n");
+ log(" (define-fun |<mod>_c <id>| ((state |<mod>_s|)) Bool (...))\n");
+ log(" Each $cover cell is converted into one of this functions. The function\n");
+ log(" evaluates to 'true' if the cover statement is activated in the state.\n");
+ log("\n");
+ log("Options:\n");
log("\n");
log(" -verbose\n");
log(" this will print the recursive walk used to export the modules.\n");
log("\n");
+ log(" -stbv\n");
+ log(" Use a BitVec sort to represent a state instead of an uninterpreted\n");
+ log(" sort. As a side-effect this will prevent use of arrays to model\n");
+ log(" memories.\n");
+ log("\n");
+ log(" -stdt\n");
+ log(" Use SMT-LIB 2.6 style datatypes to represent a state instead of an\n");
+ log(" uninterpreted sort.\n");
+ log("\n");
log(" -nobv\n");
log(" disable support for BitVec (FixedSizeBitVectors theory). without this\n");
log(" option multi-bit wires are represented using the BitVec sort and\n");
@@ -972,10 +1407,11 @@ struct Smt2Backend : public Backend {
log("from non-zero to zero in the test design.\n");
log("\n");
}
- virtual void execute(std::ostream *&f, std::string filename, std::vector<std::string> args, RTLIL::Design *design)
+ void execute(std::ostream *&f, std::string filename, std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
{
std::ifstream template_f;
- bool bvmode = true, memmode = true, wiresmode = false, verbose = false;
+ bool bvmode = true, memmode = true, wiresmode = false, verbose = false, statebv = false, statedt = false;
+ bool forallmode = false;
log_header(design, "Executing SMT2 backend.\n");
@@ -992,6 +1428,16 @@ struct Smt2Backend : public Backend {
log_warning("Options -bv and -mem are now the default. Support for -bv and -mem will be removed in the future.\n");
continue;
}
+ if (args[argidx] == "-stbv") {
+ statebv = true;
+ statedt = false;
+ continue;
+ }
+ if (args[argidx] == "-stdt") {
+ statebv = false;
+ statedt = true;
+ continue;
+ }
if (args[argidx] == "-nobv") {
bvmode = false;
memmode = false;
@@ -1033,6 +1479,12 @@ struct Smt2Backend : public Backend {
if (!memmode)
*f << stringf("; yosys-smt2-nomem\n");
+ if (statebv)
+ *f << stringf("; yosys-smt2-stbv\n");
+
+ if (statedt)
+ *f << stringf("; yosys-smt2-stdt\n");
+
std::vector<RTLIL::Module*> sorted_modules;
// extract module dependencies
@@ -1062,17 +1514,31 @@ struct Smt2Backend : public Backend {
module_deps.erase(sorted_modules.at(sorted_modules_idx++));
}
+ dict<IdString, int> mod_stbv_width;
+ dict<IdString, dict<IdString, pair<bool, bool>>> mod_clk_cache;
Module *topmod = design->top_module();
std::string topmod_id;
for (auto module : sorted_modules)
+ for (auto cell : module->cells())
+ if (cell->type.in("$allconst", "$allseq"))
+ goto found_forall;
+ if (0) {
+ found_forall:
+ forallmode = true;
+ *f << stringf("; yosys-smt2-forall\n");
+ if (!statebv && !statedt)
+ log_error("Forall-exists problems are only supported in -stbv or -stdt mode.\n");
+ }
+
+ for (auto module : sorted_modules)
{
if (module->get_bool_attribute("\\blackbox") || module->has_memories_warn() || module->has_processes_warn())
continue;
log("Creating SMT-LIBv2 representation of module %s.\n", log_id(module));
- Smt2Worker worker(module, bvmode, memmode, wiresmode, verbose);
+ Smt2Worker worker(module, bvmode, memmode, wiresmode, verbose, statebv, statedt, forallmode, mod_stbv_width, mod_clk_cache);
worker.run();
worker.write(*f);
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-19 05:49:28 +0000