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Improve import of memories via Verific 

Signed-off-by: Clifford Wolf <clifford@clifford.at>
This commit is contained in:
Clifford Wolf 2018-03-15 18:20:37 +01:00
parent bf402a806a
commit 7cf9d88028
1 changed files with 23 additions and 16 deletions
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19
frontends/verific/verific.cc
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@ -1044,13 +1044,19 @@ void VerificImporter::import_netlist(RTLIL::Design *design, Netlist *nl, std::se
if (inst->Type() == OPER_READ_PORT)
{
RTLIL::Memory *memory = module->memories.at(RTLIL::escape_id(inst->GetInput()->Name()));
if (memory->width != int(inst->OutputSize()))
log_error("Import of asymetric memories from Verific is not supported yet: %s %s\n", inst->Name(), inst->GetInput()->Name());
int numchunks = int(inst->OutputSize()) / memory->width;
int chunksbits = ceil_log2(numchunks);
RTLIL::SigSpec addr = operatorInput1(inst);
RTLIL::SigSpec data = operatorOutput(inst);
if ((numchunks * memory->width) != int(inst->OutputSize()) || (numchunks & (numchunks - 1)) != 0)
log_error("Import of asymmetric memories of this type is not supported yet: %s %s\n", inst->Name(), inst->GetInput()->Name());
RTLIL::Cell *cell = module->addCell(inst_name, "$memrd");
for (int i = 0; i < numchunks; i++)
{
RTLIL::SigSpec addr = {operatorInput1(inst), RTLIL::Const(i, chunksbits)};
RTLIL::SigSpec data = operatorOutput(inst).extract(i * memory->width, memory->width);
RTLIL::Cell *cell = module->addCell(numchunks == 1 ? inst_name :
RTLIL::IdString(stringf("%s_%d", inst_name.c_str(), i)), "$memrd");
cell->parameters["\\MEMID"] = memory->name.str();
cell->parameters["\\CLK_ENABLE"] = false;
cell->parameters["\\CLK_POLARITY"] = true;
@ -1061,6 +1067,7 @@ void VerificImporter::import_netlist(RTLIL::Design *design, Netlist *nl, std::se
cell->setPort("\\EN", RTLIL::State::Sx);
cell->setPort("\\ADDR", addr);
cell->setPort("\\DATA", data);
}
continue;
}
@ -1068,7 +1075,7 @@ void VerificImporter::import_netlist(RTLIL::Design *design, Netlist *nl, std::se
{
RTLIL::Memory *memory = module->memories.at(RTLIL::escape_id(inst->GetOutput()->Name()));
if (memory->width != int(inst->Input2Size()))
log_error("Import of asymetric memories from Verific is not supported yet: %s %s\n", inst->Name(), inst->GetInput()->Name());
log_error("Import of asymmetric memories of this type is not supported yet: %s %s\n", inst->Name(), inst->GetInput()->Name());
RTLIL::SigSpec addr = operatorInput1(inst);
RTLIL::SigSpec data = operatorInput2(inst);