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Merge pull request #406 from azonenberg/coolrunner-techmap

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Coolrunner techmapping improvements
This commit is contained in:
Clifford Wolf 2017-09-02 13:43:51 +02:00 • committed by GitHub
commit 2f75240e36
2 changed files with 125 additions and 18 deletions
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138
techlibs/coolrunner2/coolrunner2_sop.cc
View file

@ -38,26 +38,53 @@ struct Coolrunner2SopPass : public Pass {
log_header(design, "Executing COOLRUNNER2_SOP pass (break $sop cells into ANDTERM/ORTERM cells).\n");
extra_args(args, 1, design);
// Find all the $_NOT_ cells
dict<SigBit, tuple<SigBit, Cell*>> not_cells;
for (auto module : design->selected_modules())
{
pool<Cell*> cells_to_remove;
SigMap sigmap(module);
// Find all the $_NOT_ cells
dict<SigBit, tuple<SigBit, Cell*>> not_cells;
for (auto cell : module->selected_cells())
{
if (cell->type == "$_NOT_")
{
auto not_input = cell->getPort("\\A")[0];
auto not_output = cell->getPort("\\Y")[0];
auto not_input = sigmap(cell->getPort("\\A")[0]);
auto not_output = sigmap(cell->getPort("\\Y")[0]);
not_cells[not_input] = tuple<SigBit, Cell*>(not_output, cell);
}
}
}
pool<tuple<Module*, Cell*>> cells_to_remove;
for (auto module : design->selected_modules())
{
SigMap sigmap(module);
// Find wires that need to become special product terms
dict<SigBit, pool<tuple<Cell*, std::string>>> special_pterms_no_inv;
dict<SigBit, pool<tuple<Cell*, std::string>>> special_pterms_inv;
for (auto cell : module->selected_cells())
{
if (cell->type == "\\FDCP" || cell->type == "\\FDCP_N" || cell->type == "\\FDDCP" ||
cell->type == "\\FTCP" || cell->type == "\\FTCP_N" || cell->type == "\\FTDCP" ||
cell->type == "\\FDCPE" || cell->type == "\\FDCPE_N" || cell->type == "\\FDDCPE" ||
cell->type == "\\LDCP" || cell->type == "\\LDCP_N")
{
if (cell->hasPort("\\PRE"))
special_pterms_no_inv[sigmap(cell->getPort("\\PRE")[0])].insert(
tuple<Cell*, const char *>(cell, "\\PRE"));
if (cell->hasPort("\\CLR"))
special_pterms_no_inv[sigmap(cell->getPort("\\CLR")[0])].insert(
tuple<Cell*, const char *>(cell, "\\CLR"));
if (cell->hasPort("\\CE"))
special_pterms_no_inv[sigmap(cell->getPort("\\CE")[0])].insert(
tuple<Cell*, const char *>(cell, "\\CE"));
if (cell->hasPort("\\C"))
special_pterms_inv[sigmap(cell->getPort("\\C")[0])].insert(
tuple<Cell*, const char *>(cell, "\\C"));
if (cell->hasPort("\\G"))
special_pterms_inv[sigmap(cell->getPort("\\G")[0])].insert(
tuple<Cell*, const char *>(cell, "\\G"));
}
}
// Process $sop cells
for (auto cell : module->selected_cells())
{
if (cell->type == "$sop")
@ -79,7 +106,17 @@ struct Coolrunner2SopPass : public Pass {
sop_output = std::get<0>(not_cell);
// remove the $_NOT_ cell because it gets folded into the xor
cells_to_remove.insert(tuple<Module*, Cell*>(module, std::get<1>(not_cell)));
cells_to_remove.insert(std::get<1>(not_cell));
}
// Check for special P-term usage
bool is_special_pterm = false;
bool special_pterm_can_invert = false;
if (special_pterms_no_inv.count(sop_output) || special_pterms_inv.count(sop_output))
{
is_special_pterm = true;
if (!special_pterms_no_inv[sop_output].size())
special_pterm_can_invert = true;
}
// Construct AND cells
@ -120,6 +157,58 @@ struct Coolrunner2SopPass : public Pass {
xor_cell->setParam("\\INVERT_OUT", has_invert);
xor_cell->setPort("\\IN_PTC", *intermed_wires.begin());
xor_cell->setPort("\\OUT", sop_output);
// Special P-term handling
if (is_special_pterm)
{
if (!has_invert || special_pterm_can_invert)
{
// Can connect the P-term directly to the special term sinks
for (auto x : special_pterms_inv[sop_output])
std::get<0>(x)->setPort(std::get<1>(x), *intermed_wires.begin());
for (auto x : special_pterms_no_inv[sop_output])
std::get<0>(x)->setPort(std::get<1>(x), *intermed_wires.begin());
}
if (has_invert)
{
if (special_pterm_can_invert)
{
log_assert(special_pterms_no_inv[sop_output].size() == 0);
for (auto x : special_pterms_inv[sop_output])
{
auto cell = std::get<0>(x);
// Need to invert the polarity of the cell
if (cell->type == "\\FDCP") cell->type = "\\FDCP_N";
else if (cell->type == "\\FDCP_N") cell->type = "\\FDCP";
else if (cell->type == "\\FTCP") cell->type = "\\FTCP_N";
else if (cell->type == "\\FTCP_N") cell->type = "\\FTCP";
else if (cell->type == "\\FDCPE") cell->type = "\\FDCPE_N";
else if (cell->type == "\\FDCPE_N") cell->type = "\\FDCPE";
else if (cell->type == "\\LDCP") cell->type = "\\LDCP_N";
else if (cell->type == "\\LDCP_N") cell->type = "\\LDCP";
else log_assert(!"Internal error! Bad cell type!");
}
}
else
{
// Need to construct a feed-through term
auto feedthrough_out = module->addWire(NEW_ID);
auto feedthrough_cell = module->addCell(NEW_ID, "\\ANDTERM");
feedthrough_cell->setParam("\\TRUE_INP", 1);
feedthrough_cell->setParam("\\COMP_INP", 0);
feedthrough_cell->setPort("\\OUT", feedthrough_out);
feedthrough_cell->setPort("\\IN", sop_output);
feedthrough_cell->setPort("\\IN_B", SigSpec());
for (auto x : special_pterms_inv[sop_output])
std::get<0>(x)->setPort(std::get<1>(x), feedthrough_out);
for (auto x : special_pterms_no_inv[sop_output])
std::get<0>(x)->setPort(std::get<1>(x), feedthrough_out);
}
}
}
}
else
{
@ -137,18 +226,35 @@ struct Coolrunner2SopPass : public Pass {
xor_cell->setParam("\\INVERT_OUT", has_invert);
xor_cell->setPort("\\IN_ORTERM", or_to_xor_wire);
xor_cell->setPort("\\OUT", sop_output);
if (is_special_pterm)
{
// Need to construct a feed-through term
auto feedthrough_out = module->addWire(NEW_ID);
auto feedthrough_cell = module->addCell(NEW_ID, "\\ANDTERM");
feedthrough_cell->setParam("\\TRUE_INP", 1);
feedthrough_cell->setParam("\\COMP_INP", 0);
feedthrough_cell->setPort("\\OUT", feedthrough_out);
feedthrough_cell->setPort("\\IN", sop_output);
feedthrough_cell->setPort("\\IN_B", SigSpec());
for (auto x : special_pterms_inv[sop_output])
std::get<0>(x)->setPort(std::get<1>(x), feedthrough_out);
for (auto x : special_pterms_no_inv[sop_output])
std::get<0>(x)->setPort(std::get<1>(x), feedthrough_out);
}
}
// Finally, remove the $sop cell
cells_to_remove.insert(tuple<Module*, Cell*>(module, cell));
cells_to_remove.insert(cell);
}
}
}
// Actually do the removal now that we aren't iterating
for (auto mod_and_cell : cells_to_remove)
{
std::get<0>(mod_and_cell)->remove(std::get<1>(mod_and_cell));
// Actually do the removal now that we aren't iterating
for (auto cell : cells_to_remove)
{
module->remove(cell);
}
}
}
} Coolrunner2SopPass;

5
techlibs/coolrunner2/synth_coolrunner2.cc
View file

@ -152,8 +152,7 @@ struct SynthCoolrunner2Pass : public ScriptPass
if (check_label("map_pla"))
{
run("abc -sop -I 40 -P 56");
run("coolrunner2_sop");
run("opt -fast");
run("clean");
}
if (check_label("map_cells"))
@ -163,7 +162,9 @@ struct SynthCoolrunner2Pass : public ScriptPass
run("dffinit -ff FDCP_N Q INIT");
run("dffinit -ff LDCP Q INIT");
run("dffinit -ff LDCP_N Q INIT");
run("coolrunner2_sop");
run("iopadmap -bits -inpad IBUF O:I -outpad IOBUFE I:IO -inoutpad IOBUFE O:IO -toutpad IOBUFE E:I:IO -tinoutpad IOBUFE E:O:I:IO");
run("clean");
}
if (check_label("check"))