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Optimize CC_LUT2 as well

This commit is contained in:
Miodrag Milanovic 2025-07-07 16:57:20 +02:00
parent c8d2b1697b
commit 2a7a1a142f
1 changed files with 13 additions and 5 deletions
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18
himbaechel/uarch/gatemate/pack.cc
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@ -297,27 +297,35 @@ void GateMatePacker::optimize_lut()
{
for (auto &cell : ctx->cells) {
CellInfo &ci = *cell.second;
if (!ci.type.in(id_CC_LUT1))
if (!ci.type.in(id_CC_LUT1, id_CC_LUT2))
continue;
uint8_t val = int_or_default(ci.params, id_INIT, 0);
NetInfo *o_net = ci.getPort(id_O);
if (!o_net) {
packed_cells.insert(ci.name);
count++;
continue;
}
uint8_t val = int_or_default(ci.params, id_INIT, 0);
if (ci.type == id_CC_LUT1)
val = val << 2 | val;
switch (val) {
case 0: // constant 0
case LUT_ZERO: // constant 0
move_connections(o_net, gnd_net);
packed_cells.insert(ci.name);
count++;
break;
case 2: // propagate
case LUT_D0: // propagate
move_connections(o_net, ci.getPort(id_I0));
packed_cells.insert(ci.name);
count++;
break;
case 3: // constant 1
case LUT_D1: // propagate
move_connections(o_net, ci.getPort(id_I1));
packed_cells.insert(ci.name);
count++;
break;
case LUT_ONE: // constant 1
move_connections(o_net, vcc_net);
packed_cells.insert(ci.name);
count++;