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Minor performance tweaks and fixes

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Signed-off-by: David Shah <davey1576@gmail.com>
This commit is contained in:
David Shah 2018-06-17 16:03:16 +02:00
parent f723aaa373
commit f66999a883
3 changed files with 30 additions and 24 deletions
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2
common/place_sa.cc
View File

@ -66,7 +66,7 @@ static float random_float_upto(rnd_state &rnd, float limit)
static int random_int_between(rnd_state &rnd, int a, int b)
{
return a + int(random_float_upto(rnd, b - a));
return a + int(random_float_upto(rnd, b - a) - 0.00001);
}
// Initial random placement

4
common/route.cc
View File

@ -440,8 +440,8 @@ void route_design(Design *design, bool verbose)
"routing.\n",
int(netsQueue.size()));
ripup_pip_penalty += 5;
ripup_wire_penalty += 5;
ripup_pip_penalty *= 1.5;
ripup_wire_penalty *= 1.5;
}
}

48
ice40/arch_place.cc
View File

@ -24,8 +24,8 @@
NEXTPNR_NAMESPACE_BEGIN
static const NetInfo *get_net_or_nullptr(const CellInfo *cell,
const IdString port)
static const NetInfo *get_net_or_empty(const CellInfo *cell,
const IdString port)
{
auto found = cell->ports.find(port);
if (found != cell->ports.end())
@ -38,47 +38,53 @@ static bool logicCellsCompatible(const std::vector<const CellInfo *> &cells)
{
bool dffs_exist = false, dffs_neg = false;
const NetInfo *cen = nullptr, *clk = nullptr, *sr = nullptr;
static std::unordered_set<const NetInfo *> locals;
static std::unordered_set<IdString> locals;
locals.clear();
for (auto cell : cells) {
if (bool_or_default(cell->params, "DFF_ENABLE")) {
if (!dffs_exist) {
dffs_exist = true;
cen = get_net_or_nullptr(cell, "CEN");
clk = get_net_or_nullptr(cell, "CLK");
sr = get_net_or_nullptr(cell, "SR");
cen = get_net_or_empty(cell, "CEN");
clk = get_net_or_empty(cell, "CLK");
sr = get_net_or_empty(cell, "SR");
if (!is_global_net(cen))
locals.insert(cen);
if (!is_global_net(clk))
locals.insert(clk);
if (!is_global_net(sr))
locals.insert(sr);
if (!is_global_net(cen) && cen != nullptr)
locals.insert(cen->name);
if (!is_global_net(clk) && clk != nullptr)
locals.insert(clk->name);
if (!is_global_net(sr) && sr != nullptr)
locals.insert(sr->name);
if (bool_or_default(cell->params, "NEG_CLK")) {
dffs_neg = true;
}
} else {
if (cen != get_net_or_nullptr(cell, "CEN"))
if (cen != get_net_or_empty(cell, "CEN"))
return false;
if (clk != get_net_or_nullptr(cell, "CLK"))
if (clk != get_net_or_empty(cell, "CLK"))
return false;
if (sr != get_net_or_nullptr(cell, "SR"))
if (sr != get_net_or_empty(cell, "SR"))
return false;
if (dffs_neg != bool_or_default(cell->params, "NEG_CLK"))
return false;
}
}
locals.insert(get_net_or_nullptr(cell, "I0"));
locals.insert(get_net_or_nullptr(cell, "I1"));
locals.insert(get_net_or_nullptr(cell, "I2"));
locals.insert(get_net_or_nullptr(cell, "I3"));
const NetInfo *i0 = get_net_or_empty(cell, "I0"),
*i1 = get_net_or_empty(cell, "I1"),
*i2 = get_net_or_empty(cell, "I2"),
*i3 = get_net_or_empty(cell, "I3");
if (i0 != nullptr)
locals.insert(i0->name);
if (i1 != nullptr)
locals.insert(i1->name);
if (i2 != nullptr)
locals.insert(i2->name);
if (i3 != nullptr)
locals.insert(i3->name);
}
locals.erase(nullptr); // disconnected signals don't use local tracks
return locals.size() <= 32;
}