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Merge pull request #1765 from YosysHQ/claire/btor_info

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Add info-file and cover features to write_btor
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Claire Wolf 2020-04-02 15:38:27 +02:00 • committed by GitHub
commit 104c004e6d
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1 changed files with 113 additions and 9 deletions
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122
backends/btor/btor.cc
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@ -39,6 +39,7 @@ struct BtorWorker
RTLIL::Module *module;
bool verbose;
bool single_bad;
bool cover_mode;
int next_nid = 1;
int initstate_nid = -1;
@ -71,7 +72,10 @@ struct BtorWorker
vector<int> bad_properties;
dict<SigBit, bool> initbits;
pool<Wire*> statewires;
string indent;
string indent, info_filename;
vector<string> info_lines;
dict<int, int> info_clocks;
void btorf(const char *fmt, ...)
{
@ -81,6 +85,14 @@ struct BtorWorker
va_end(ap);
}
void infof(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
info_lines.push_back(vstringf(fmt, ap));
va_end(ap);
}
void btorf_push(const string &id)
{
if (verbose) {
@ -544,11 +556,26 @@ struct BtorWorker
goto okay;
}
if (cell->type.in("$dff", "$ff", "$_DFF_P_", "$_DFF_N", "$_FF_"))
if (cell->type.in("$dff", "$ff", "$_DFF_P_", "$_DFF_N_", "$_FF_"))
{
SigSpec sig_d = sigmap(cell->getPort("\\D"));
SigSpec sig_q = sigmap(cell->getPort("\\Q"));
if (!info_filename.empty() && cell->type.in("$dff", "$_DFF_P_", "$_DFF_N_"))
{
SigSpec sig_c = sigmap(cell->getPort(cell->type == "$dff" ? "\\CLK" : "\\C"));
int nid = get_sig_nid(sig_c);
bool negedge = false;
if (cell->type == "$_DFF_N_")
negedge = true;
if (cell->type == "$dff" && !cell->getParam("\\CLK_POLARITY").as_bool())
negedge = true;
info_clocks[nid] |= negedge ? 2 : 1;
}
IdString symbol;
if (sig_q.is_wire()) {
@ -983,9 +1010,12 @@ struct BtorWorker
return nid;
}
BtorWorker(std::ostream &f, RTLIL::Module *module, bool verbose, bool single_bad) :
f(f), sigmap(module), module(module), verbose(verbose), single_bad(single_bad)
BtorWorker(std::ostream &f, RTLIL::Module *module, bool verbose, bool single_bad, bool cover_mode, string info_filename) :
f(f), sigmap(module), module(module), verbose(verbose), single_bad(single_bad), cover_mode(cover_mode), info_filename(info_filename)
{
if (!info_filename.empty())
infof("name %s\n", log_id(module));
btorf_push("inputs");
for (auto wire : module->wires())
@ -1066,16 +1096,46 @@ struct BtorWorker
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);
if (single_bad) {
if (single_bad && !cover_mode) {
bad_properties.push_back(nid_en_and_not_a);
} else {
int nid = next_nid++;
string infostr = log_id(cell);
if (infostr[0] == '$' && cell->attributes.count("\\src")) {
infostr = cell->attributes.at("\\src").decode_string().c_str();
std::replace(infostr.begin(), infostr.end(), ' ', '_');
}
btorf("%d bad %d %s\n", nid, nid_en_and_not_a, infostr.c_str());
if (cover_mode) {
infof("bad %d %s\n", nid_en_and_not_a, infostr.c_str());
} else {
int nid = next_nid++;
btorf("%d bad %d %s\n", nid, nid_en_and_not_a, infostr.c_str());
}
}
btorf_pop(log_id(cell));
}
if (cell->type == "$cover" && cover_mode)
{
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"));
int nid_en_and_a = next_nid++;
btorf("%d and %d %d %d\n", nid_en_and_a, sid, nid_en, nid_a);
if (single_bad) {
bad_properties.push_back(nid_en_and_a);
} else {
string infostr = log_id(cell);
if (infostr[0] == '$' && cell->attributes.count("\\src")) {
infostr = cell->attributes.at("\\src").decode_string().c_str();
std::replace(infostr.begin(), infostr.end(), ' ', '_');
}
int nid = next_nid++;
btorf("%d bad %d %s\n", nid, nid_en_and_a, infostr.c_str());
}
btorf_pop(log_id(cell));
@ -1210,6 +1270,35 @@ struct BtorWorker
btorf("%d bad %d\n", nid, todo[cursor]);
}
}
if (!info_filename.empty())
{
for (auto &it : info_clocks)
{
switch (it.second)
{
case 1:
infof("posedge %d\n", it.first);
break;
case 2:
infof("negedge %d\n", it.first);
break;
case 3:
infof("event %d\n", it.first);
break;
default:
log_abort();
}
}
std::ofstream f;
f.open(info_filename.c_str(), std::ofstream::trunc);
if (f.fail())
log_error("Can't open file `%s' for writing: %s\n", info_filename.c_str(), strerror(errno));
for (auto &it : info_lines)
f << it;
f.close();
}
}
};
@ -1229,10 +1318,17 @@ struct BtorBackend : public Backend {
log(" -s\n");
log(" Output only a single bad property for all asserts\n");
log("\n");
log(" -c\n");
log(" Output cover properties using 'bad' statements instead of asserts\n");
log("\n");
log(" -i <filename>\n");
log(" Create additional info file with auxiliary information\n");
log("\n");
}
void execute(std::ostream *&f, std::string filename, std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
{
bool verbose = false, single_bad = false;
bool verbose = false, single_bad = false, cover_mode = false;
string info_filename;
log_header(design, "Executing BTOR backend.\n");
@ -1247,6 +1343,14 @@ struct BtorBackend : public Backend {
single_bad = true;
continue;
}
if (args[argidx] == "-c") {
cover_mode = true;
continue;
}
if (args[argidx] == "-i" && argidx+1 < args.size()) {
info_filename = args[++argidx];
continue;
}
break;
}
extra_args(f, filename, args, argidx);
@ -1259,7 +1363,7 @@ struct BtorBackend : public Backend {
*f << stringf("; BTOR description generated by %s for module %s.\n",
yosys_version_str, log_id(topmod));
BtorWorker(*f, topmod, verbose, single_bad);
BtorWorker(*f, topmod, verbose, single_bad, cover_mode, info_filename);
*f << stringf("; end of yosys output\n");
}