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place_common: Relative constraints working for basic example

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Signed-off-by: David Shah <davey1576@gmail.com>
This commit is contained in:
David Shah 2018-08-03 15:25:43 +02:00
parent 48e06896a2
commit 60757a2dd7
1 changed files with 28 additions and 11 deletions
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39
common/place_common.cc
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@ -251,6 +251,7 @@ class ConstraintLegaliseWorker
zSearch = IncreasingDiameterSearch(loc.z + child->constr_z);
}
}
bool success = false;
while (!xSearch.done()) {
Loc cloc;
cloc.x = xSearch.get();
@ -269,12 +270,15 @@ class ConstraintLegaliseWorker
if (usedLocations.count(cloc))
continue;
if (valid_loc_for(child, cloc, solution, usedLocations))
return true;
if (valid_loc_for(child, cloc, solution, usedLocations)) {
success = true;
break;
}
}
if (!success) {
usedLocations.erase(loc);
return false;
}
usedLocations.erase(loc);
return false;
}
if (solution.count(cell->name))
usedLocations.erase(solution.at(cell->name));
@ -325,13 +329,26 @@ class ConstraintLegaliseWorker
std::unordered_set<Loc> used;
if (valid_loc_for(cell, rootLoc, solution, used)) {
for (auto cp : solution) {
// First unbind all cells
if (ctx->cells.at(cp.first)->bel != BelId())
ctx->unbindBel(ctx->cells.at(cp.first)->bel);
}
for (auto cp : solution) {
if (ctx->verbose)
log_info(" placing '%s' at (%d, %d, %d)\n", cp.first.c_str(ctx), cp.second.x, cp.second.y, cp.second.z);
BelId target = ctx->getBelByLocation(cp.second);
IdString conflicting = ctx->getConflictingBelCell(target);
if (conflicting != IdString()) {
CellInfo *confl_cell = ctx->cells.at(conflicting).get();
NPNR_ASSERT(confl_cell->belStrength < STRENGTH_STRONG);
ctx->unbindBel(target);
rippedCells.push_back(confl_cell);
if(ctx->verbose)
log_info(" resolved to bel: '%s'\n", ctx->getBelName(target).c_str(ctx));
if (!ctx->checkBelAvail(target)) {
IdString conflicting = ctx->getConflictingBelCell(target);
if (conflicting != IdString()) {
CellInfo *confl_cell = ctx->cells.at(conflicting).get();
if (ctx->verbose)
log_info(" '%s' already placed at '%s'\n", conflicting.c_str(ctx), ctx->getBelName(confl_cell->bel).c_str(ctx));
NPNR_ASSERT(confl_cell->belStrength < STRENGTH_STRONG);
ctx->unbindBel(target);
rippedCells.push_back(confl_cell);
}
}
ctx->bindBel(target, cp.first, STRENGTH_LOCKED);
}