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generic: Use HeAP as placer where possible

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Signed-off-by: David Shah <dave@ds0.me>
This commit is contained in:
David Shah 2019-11-26 10:10:26 +00:00
parent ff9d6b4f89
commit defafcf5fe
1 changed files with 33 additions and 3 deletions
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36
generic/arch.cc
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@ -21,6 +21,7 @@
#include <math.h>
#include "nextpnr.h"
#include "placer1.h"
#include "placer_heap.h"
#include "router1.h"
#include "util.h"
@ -494,8 +495,29 @@ bool Arch::getBudgetOverride(const NetInfo *net_info, const PortRef &sink, delay
bool Arch::place()
{
std::string placer = str_or_default(settings, id("placer"), defaultPlacer);
// FIXME: No HeAP because it needs a list of IO buffers
if (placer == "sa") {
if (placer == "heap") {
bool have_iobuf_or_constr = false;
for (auto cell : sorted(cells)) {
CellInfo *ci = cell.second;
if (ci->type == id("GENERIC_IOB") || ci->bel != BelId() || ci->attrs.count(id("BEL"))) {
have_iobuf_or_constr = true;
break;
}
}
bool retVal;
if (!have_iobuf_or_constr) {
log_warning("Unable to use HeAP due to a lack of IO buffers or constrained cells as anchors; reverting to "
"SA.\n");
retVal = placer1(getCtx(), Placer1Cfg(getCtx()));
} else {
PlacerHeapCfg cfg(getCtx());
cfg.ioBufTypes.insert(id("GENERIC_IOB"));
retVal = placer_heap(getCtx(), cfg);
}
getCtx()->settings[getCtx()->id("place")] = 1;
archInfoToAttributes();
return retVal;
} else if (placer == "sa") {
bool retVal = placer1(getCtx(), Placer1Cfg(getCtx()));
getCtx()->settings[getCtx()->id("place")] = 1;
archInfoToAttributes();
@ -596,9 +618,17 @@ bool Arch::isBelLocationValid(BelId bel) const
return cellsCompatible(cells.data(), int(cells.size()));
}
#ifdef WITH_HEAP
const std::string Arch::defaultPlacer = "heap";
#else
const std::string Arch::defaultPlacer = "sa";
const std::vector<std::string> Arch::availablePlacers = {"sa"};
#endif
const std::vector<std::string> Arch::availablePlacers = {"sa",
#ifdef WITH_HEAP
"heap"
#endif
};
void Arch::assignArchInfo()
{
for (auto &cell : getCtx()->cells) {