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Merge pull request #3057 from YosysHQ/claire/verific_latches 

Initial Verific impoter support for {PRIM,WIDE_OPER}_DLATCH{,RS}
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Claire Xen 2021-10-21 13:00:53 +02:00 committed by GitHub
parent e64456f920 90b440f870
commit 51d42cc917
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 61 additions and 4 deletions
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65
frontends/verific/verific.cc
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@ -441,7 +441,17 @@ bool VerificImporter::import_netlist_instance_gates(Instance *inst, RTLIL::IdStr
return true;
}
// FIXME: PRIM_DLATCH
if (inst->Type() == PRIM_DLATCH)
{
if (inst->GetAsyncCond()->IsGnd()) {
module->addDlatch(inst_name, net_map_at(inst->GetControl()), net_map_at(inst->GetInput()), net_map_at(inst->GetOutput()));
} else {
RTLIL::SigSpec sig_set = module->And(NEW_ID, net_map_at(inst->GetAsyncCond()), net_map_at(inst->GetAsyncVal()));
RTLIL::SigSpec sig_clr = module->And(NEW_ID, net_map_at(inst->GetAsyncCond()), module->Not(NEW_ID, net_map_at(inst->GetAsyncVal())));
module->addDlatchsr(inst_name, net_map_at(inst->GetControl()), sig_set, sig_clr, net_map_at(inst->GetInput()), net_map_at(inst->GetOutput()));
}
return true;
}
return false;
}
@ -568,7 +578,18 @@ bool VerificImporter::import_netlist_instance_cells(Instance *inst, RTLIL::IdStr
return true;
}
// FIXME: PRIM_DLATCH
if (inst->Type() == PRIM_DLATCH)
{
if (inst->GetAsyncCond()->IsGnd()) {
cell = module->addDlatch(inst_name, net_map_at(inst->GetControl()), net_map_at(inst->GetInput()), net_map_at(inst->GetOutput()));
} else {
RTLIL::SigSpec sig_set = module->And(NEW_ID, net_map_at(inst->GetAsyncCond()), net_map_at(inst->GetAsyncVal()));
RTLIL::SigSpec sig_clr = module->And(NEW_ID, net_map_at(inst->GetAsyncCond()), module->Not(NEW_ID, net_map_at(inst->GetAsyncVal())));
cell = module->addDlatchsr(inst_name, net_map_at(inst->GetControl()), sig_set, sig_clr, net_map_at(inst->GetInput()), net_map_at(inst->GetOutput()));
}
import_attributes(cell->attributes, inst);
return true;
}
#define IN operatorInput(inst)
#define IN1 operatorInput1(inst)
@ -842,7 +863,19 @@ bool VerificImporter::import_netlist_instance_cells(Instance *inst, RTLIL::IdStr
return true;
}
// FIXME: OPER_WIDE_DLATCHSR
if (inst->Type() == OPER_WIDE_DLATCHRS)
{
RTLIL::SigSpec sig_set = operatorInport(inst, "set");
RTLIL::SigSpec sig_reset = operatorInport(inst, "reset");
if (sig_set.is_fully_const() && !sig_set.as_bool() && sig_reset.is_fully_const() && !sig_reset.as_bool())
cell = module->addDlatch(inst_name, net_map_at(inst->GetControl()), IN, OUT);
else
cell = module->addDlatchsr(inst_name, net_map_at(inst->GetControl()), sig_set, sig_reset, IN, OUT);
import_attributes(cell->attributes, inst);
return true;
}
if (inst->Type() == OPER_WIDE_DFF)
{
@ -872,7 +905,31 @@ bool VerificImporter::import_netlist_instance_cells(Instance *inst, RTLIL::IdStr
return true;
}
// FIXME: OPER_WIDE_DLATCH
if (inst->Type() == OPER_WIDE_DLATCH)
{
RTLIL::SigSpec sig_d = IN;
RTLIL::SigSpec sig_q = OUT;
RTLIL::SigSpec sig_adata = IN1;
RTLIL::SigSpec sig_acond = IN2;
if (sig_acond.is_fully_const() && !sig_acond.as_bool()) {
cell = module->addDlatch(inst_name, net_map_at(inst->GetControl()), sig_d, sig_q);
import_attributes(cell->attributes, inst);
} else {
int offset = 0, width = 0;
for (offset = 0; offset < GetSize(sig_acond); offset += width) {
for (width = 1; offset+width < GetSize(sig_acond); width++)
if (sig_acond[offset] != sig_acond[offset+width]) break;
RTLIL::SigSpec sig_set = module->Mux(NEW_ID, RTLIL::SigSpec(0, width), sig_adata.extract(offset, width), sig_acond[offset]);
RTLIL::SigSpec sig_clr = module->Mux(NEW_ID, RTLIL::SigSpec(0, width), module->Not(NEW_ID, sig_adata.extract(offset, width)), sig_acond[offset]);
cell = module->addDlatchsr(inst_name, net_map_at(inst->GetControl()), sig_set, sig_clr,
sig_d.extract(offset, width), sig_q.extract(offset, width));
import_attributes(cell->attributes, inst);
}
}
return true;
}
#undef IN
#undef IN1