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Improvements in BLIF back-end

This commit is contained in:
Clifford Wolf 2015-07-29 17:06:19 +02:00
parent 4513ff1b85
commit eac0bcd7d3
1 changed files with 84 additions and 5 deletions
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89
backends/blif/blif.cc
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@ -56,9 +56,31 @@ struct BlifDumper
BlifDumperConfig *config; BlifDumperConfig *config;
CellTypes ct; CellTypes ct;
SigMap sigmap;
dict<SigBit, int> init_bits;
BlifDumper(std::ostream &f, RTLIL::Module *module, RTLIL::Design *design, BlifDumperConfig *config) : BlifDumper(std::ostream &f, RTLIL::Module *module, RTLIL::Design *design, BlifDumperConfig *config) :
f(f), module(module), design(design), config(config), ct(design) f(f), module(module), design(design), config(config), ct(design), sigmap(module)
{ {
for (Wire *wire : module->wires())
if (wire->attributes.count("\\init")) {
SigSpec initsig = sigmap(wire);
Const initval = wire->attributes.at("\\init");
for (int i = 0; i < GetSize(initsig) && i < GetSize(initval); i++)
switch (initval[i]) {
case State::S0:
init_bits[initsig[i]] = 0;
break;
case State::S1:
init_bits[initsig[i]] = 1;
break;
case State::Sx:
init_bits[initsig[i]] = 2;
break;
default:
break;
}
}
} }
vector<shared_str> cstr_buf; vector<shared_str> cstr_buf;
@ -93,6 +115,19 @@ struct BlifDumper
return cstr_buf.back().c_str(); return cstr_buf.back().c_str();
} }
const char *cstr_init(RTLIL::SigBit sig)
{
sigmap.apply(sig);
if (init_bits.count(sig) == 0)
return "";
string str = stringf(" %d", init_bits.at(sig));
cstr_buf.push_back(str);
return cstr_buf.back().c_str();
}
const char *subckt_or_gate(std::string cell_type) const char *subckt_or_gate(std::string cell_type)
{ {
if (!config->gates_mode) if (!config->gates_mode)
@ -217,6 +252,50 @@ struct BlifDumper
continue; continue;
} }
if (!config->icells_mode && cell->type == "$_NAND_") {
f << stringf(".names %s %s %s\n0- 1\n-0 1\n",
cstr(cell->getPort("\\A")), cstr(cell->getPort("\\B")), cstr(cell->getPort("\\Y")));
continue;
}
if (!config->icells_mode && cell->type == "$_NOR_") {
f << stringf(".names %s %s %s\n00 1\n",
cstr(cell->getPort("\\A")), cstr(cell->getPort("\\B")), cstr(cell->getPort("\\Y")));
continue;
}
if (!config->icells_mode && cell->type == "$_XNOR_") {
f << stringf(".names %s %s %s\n11 1\n00 1\n",
cstr(cell->getPort("\\A")), cstr(cell->getPort("\\B")), cstr(cell->getPort("\\Y")));
continue;
}
if (!config->icells_mode && cell->type == "$_AOI3_") {
f << stringf(".names %s %s %s %s\n-00 1\n0-0 1\n",
cstr(cell->getPort("\\A")), cstr(cell->getPort("\\B")), cstr(cell->getPort("\\C")), cstr(cell->getPort("\\Y")));
continue;
}
if (!config->icells_mode && cell->type == "$_OAI3_") {
f << stringf(".names %s %s %s %s\n00- 1\n--0 1\n",
cstr(cell->getPort("\\A")), cstr(cell->getPort("\\B")), cstr(cell->getPort("\\C")), cstr(cell->getPort("\\Y")));
continue;
}
if (!config->icells_mode && cell->type == "$_AOI4_") {
f << stringf(".names %s %s %s %s %s\n-0-0 1\n-00- 1\n0--0 1\n0-0- 1\n",
cstr(cell->getPort("\\A")), cstr(cell->getPort("\\B")),
cstr(cell->getPort("\\C")), cstr(cell->getPort("\\D")), cstr(cell->getPort("\\Y")));
continue;
}
if (!config->icells_mode && cell->type == "$_OAI4_") {
f << stringf(".names %s %s %s %s %s\n00-- 1\n--00 1\n",
cstr(cell->getPort("\\A")), cstr(cell->getPort("\\B")),
cstr(cell->getPort("\\C")), cstr(cell->getPort("\\D")), cstr(cell->getPort("\\Y")));
continue;
}
if (!config->icells_mode && cell->type == "$_MUX_") { if (!config->icells_mode && cell->type == "$_MUX_") {
f << stringf(".names %s %s %s %s\n1-0 1\n-11 1\n", f << stringf(".names %s %s %s %s\n1-0 1\n-11 1\n",
cstr(cell->getPort("\\A")), cstr(cell->getPort("\\B")), cstr(cell->getPort("\\A")), cstr(cell->getPort("\\B")),
@ -225,14 +304,14 @@ struct BlifDumper
} }
if (!config->icells_mode && cell->type == "$_DFF_N_") { if (!config->icells_mode && cell->type == "$_DFF_N_") {
f << stringf(".latch %s %s fe %s\n", f << stringf(".latch %s %s fe %s%s\n", cstr(cell->getPort("\\D")), cstr(cell->getPort("\\Q")),
cstr(cell->getPort("\\D")), cstr(cell->getPort("\\Q")), cstr(cell->getPort("\\C"))); cstr(cell->getPort("\\C")), cstr_init(cell->getPort("\\Q")));
continue; continue;
} }
if (!config->icells_mode && cell->type == "$_DFF_P_") { if (!config->icells_mode && cell->type == "$_DFF_P_") {
f << stringf(".latch %s %s re %s\n", f << stringf(".latch %s %s re %s%s\n", cstr(cell->getPort("\\D")), cstr(cell->getPort("\\Q")),
cstr(cell->getPort("\\D")), cstr(cell->getPort("\\Q")), cstr(cell->getPort("\\C"))); cstr(cell->getPort("\\C")), cstr_init(cell->getPort("\\Q")));
continue; continue;
} }