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Minor fixes in ice40_ff* passes for sloppy SB_DFF instantiations

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This commit is contained in:
Clifford Wolf 2016-07-08 14:41:36 +02:00
parent 9a101dc1f7
commit 21659847a7
2 changed files with 24 additions and 13 deletions
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30
techlibs/ice40/ice40_ffinit.cc
View file

@ -101,17 +101,23 @@ struct Ice40FfinitPass : public Pass {
if (!sb_dff_types.count(cell->type))
continue;
SigBit sig_d = sigmap(cell->getPort("\\D"));
SigBit sig_q = sigmap(cell->getPort("\\Q"));
SigSpec sig_d = cell->getPort("\\D");
SigSpec sig_q = cell->getPort("\\Q");
if (!initbits.count(sig_q))
if (GetSize(sig_d) < 1 || GetSize(sig_q) < 1)
continue;
State val = initbits.at(sig_q);
handled_initbits.insert(sig_q);
SigBit bit_d = sigmap(sig_d[0]);
SigBit bit_q = sigmap(sig_q[0]);
if (!initbits.count(bit_q))
continue;
State val = initbits.at(bit_q);
handled_initbits.insert(bit_q);
log("FF init value for cell %s (%s): %s = %c\n", log_id(cell), log_id(cell->type),
log_signal(sig_q), val != State::S0 ? '1' : '0');
log_signal(bit_q), val != State::S0 ? '1' : '0');
if (val == State::S0)
continue;
@ -131,14 +137,14 @@ struct Ice40FfinitPass : public Pass {
cell->unsetPort("\\R");
}
Wire *new_sig_d = module->addWire(NEW_ID);
Wire *new_sig_q = module->addWire(NEW_ID);
Wire *new_bit_d = module->addWire(NEW_ID);
Wire *new_bit_q = module->addWire(NEW_ID);
module->addNotGate(NEW_ID, sig_d, new_sig_d);
module->addNotGate(NEW_ID, new_sig_q, sig_q);
module->addNotGate(NEW_ID, bit_d, new_bit_d);
module->addNotGate(NEW_ID, new_bit_q, bit_q);
cell->setPort("\\D", new_sig_d);
cell->setPort("\\Q", new_sig_q);
cell->setPort("\\D", new_bit_d);
cell->setPort("\\Q", new_bit_q);
}
for (auto wire : init_wires)

7
techlibs/ice40/ice40_ffssr.cc
View file

@ -81,7 +81,12 @@ struct Ice40FfssrPass : public Pass {
for (auto cell : ff_cells)
{
SigBit bit_d = sigmap(cell->getPort("\\D"));
SigSpec sig_d = cell->getPort("\\D");
if (GetSize(sig_d) < 1)
continue;
SigBit bit_d = sigmap(sig_d[0]);
if (sr_muxes.count(bit_d) == 0)
continue;