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memory_nordff: Use Mem helpers.

This commit is contained in:
Marcelina Kościelnicka 2020-10-17 22:20:16 +02:00
parent 8720482ebd
commit 248b193d6d
1 changed files with 9 additions and 63 deletions
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72
passes/memory/memory_nordff.cc
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@ -19,6 +19,7 @@
#include "kernel/yosys.h"
#include "kernel/sigtools.h"
#include "kernel/mem.h"
USING_YOSYS_NAMESPACE
PRIVATE_NAMESPACE_BEGIN
@ -37,7 +38,7 @@ struct MemoryNordffPass : public Pass {
}
void execute(std::vector<std::string> args, RTLIL::Design *design) override
{
log_header(design, "Executing MEMORY_NORDFF pass (extracting $dff cells from $mem).\n");
log_header(design, "Executing MEMORY_NORDFF pass (extracting $dff cells from memories).\n");
size_t argidx;
for (argidx = 1; argidx < args.size(); argidx++) {
@ -50,70 +51,15 @@ struct MemoryNordffPass : public Pass {
extra_args(args, argidx, design);
for (auto module : design->selected_modules())
for (auto cell : vector<Cell*>(module->selected_cells()))
for (auto &mem : Mem::get_selected_memories(module))
{
if (cell->type != ID($mem))
continue;
bool changed = false;
for (int i = 0; i < GetSize(mem.rd_ports); i++)
if (mem.extract_rdff(i))
changed = true;
int rd_ports = cell->getParam(ID::RD_PORTS).as_int();
int abits = cell->getParam(ID::ABITS).as_int();
int width = cell->getParam(ID::WIDTH).as_int();
SigSpec rd_addr = cell->getPort(ID::RD_ADDR);
SigSpec rd_data = cell->getPort(ID::RD_DATA);
SigSpec rd_clk = cell->getPort(ID::RD_CLK);
SigSpec rd_en = cell->getPort(ID::RD_EN);
Const rd_clk_enable = cell->getParam(ID::RD_CLK_ENABLE);
Const rd_clk_polarity = cell->getParam(ID::RD_CLK_POLARITY);
for (int i = 0; i < rd_ports; i++)
{
bool clk_enable = rd_clk_enable[i] == State::S1;
if (clk_enable)
{
bool clk_polarity = cell->getParam(ID::RD_CLK_POLARITY)[i] == State::S1;
bool transparent = cell->getParam(ID::RD_TRANSPARENT)[i] == State::S1;
SigSpec clk = cell->getPort(ID::RD_CLK)[i] ;
SigSpec en = cell->getPort(ID::RD_EN)[i];
Cell *c;
if (transparent)
{
SigSpec sig_q = module->addWire(NEW_ID, abits);
SigSpec sig_d = rd_addr.extract(abits * i, abits);
rd_addr.replace(abits * i, sig_q);
if (en != State::S1)
sig_d = module->Mux(NEW_ID, sig_q, sig_d, en);
c = module->addDff(NEW_ID, clk, sig_d, sig_q, clk_polarity);
}
else
{
SigSpec sig_d = module->addWire(NEW_ID, width);
SigSpec sig_q = rd_data.extract(width * i, width);
rd_data.replace(width *i, sig_d);
if (en != State::S1)
sig_d = module->Mux(NEW_ID, sig_q, sig_d, en);
c = module->addDff(NEW_ID, clk, sig_d, sig_q, clk_polarity);
}
log("Extracted %s FF from read port %d of %s.%s: %s\n", transparent ? "addr" : "data",
i, log_id(module), log_id(cell), log_id(c));
}
rd_en[i] = State::S1;
rd_clk[i] = State::S0;
rd_clk_enable[i] = State::S0;
rd_clk_polarity[i] = State::S1;
}
cell->setPort(ID::RD_ADDR, rd_addr);
cell->setPort(ID::RD_DATA, rd_data);
cell->setPort(ID::RD_CLK, rd_clk);
cell->setPort(ID::RD_EN, rd_en);
cell->setParam(ID::RD_CLK_ENABLE, rd_clk_enable);
cell->setParam(ID::RD_CLK_POLARITY, rd_clk_polarity);
if (changed)
mem.emit();
}
}
} MemoryNordffPass;