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Fix CY packing

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This commit is contained in:
Miodrag Milanovic 2024-06-10 17:59:49 +02:00
parent 2da92d0d7e
commit bb34a6fa8f
2 changed files with 35 additions and 16 deletions
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49
himbaechel/uarch/ng-ultra/pack.cc
View File

@ -205,7 +205,7 @@ void NgUltraPacker::disconnect_if_gnd(CellInfo *cell, IdString input)
}
}
void NgUltraPacker::connect_gnd_if_unconnected(CellInfo *cell, IdString input)
void NgUltraPacker::connect_gnd_if_unconnected(CellInfo *cell, IdString input, bool warn = true)
{
NetInfo *net = cell->getPort(input);
if (net)
@ -215,7 +215,8 @@ void NgUltraPacker::connect_gnd_if_unconnected(CellInfo *cell, IdString input)
auto fnd_net = ctx->nets.find(ctx->id("$PACKER_GND"));
if (fnd_net != ctx->nets.end()) {
cell->connectPort(input, fnd_net->second.get());
log_warning("Connected GND to mandatory port '%s' of cell '%s'(%s).\n", input.c_str(ctx), cell->name.c_str(ctx), cell->type.c_str(ctx));
if (warn)
log_warning("Connected GND to mandatory port '%s' of cell '%s'(%s).\n", input.c_str(ctx), cell->name.c_str(ctx), cell->type.c_str(ctx));
}
}
@ -640,6 +641,8 @@ void NgUltraPacker::exchange_if_constant(CellInfo *cell, IdString input1, IdStri
NetInfo *net2 = cell->getPort(input2);
if (!net1 || !net2)
return;
if (net2->name.in(ctx->id("$PACKER_GND"), ctx->id("$PACKER_VCC")))
return;
if (net1->name.in(ctx->id("$PACKER_GND"), ctx->id("$PACKER_VCC"))) {
cell->disconnectPort(input1);
cell->disconnectPort(input2);
@ -661,10 +664,9 @@ void NgUltraPacker::pack_cys(void)
if (!ci_net || !ci_net->driver.cell || ci_net->driver.cell->type != id_NX_CY) {
root_cys.push_back(ci);
}
exchange_if_constant(ci, id_A1, id_B1);
exchange_if_constant(ci, id_A2, id_B2);
exchange_if_constant(ci, id_A3, id_B3);
exchange_if_constant(ci, id_A4, id_B4);
for (int i=1;i<=4;i++) {
exchange_if_constant(ci, ctx->idf("A%d",i), ctx->idf("B%d",i));
}
}
std::vector<std::vector<CellInfo *>> groups;
@ -675,6 +677,9 @@ void NgUltraPacker::pack_cys(void)
while (true) {
NetInfo *co_net = cy->getPort(id_CO);
if (co_net && co_net->users.entries() > 0) {
for (int i=1;i<=4;i++) {
connect_gnd_if_unconnected(cy, ctx->idf("B%d",i), true);
}
cy = (*co_net->users.begin()).cell;
if (cy->type != id_NX_CY || co_net->users.entries() != 1) {
log_warning("Cells %s CO output connected to:\n",group.back()->name.c_str(ctx));
@ -684,21 +689,25 @@ void NgUltraPacker::pack_cys(void)
}
group.push_back(cy);
} else {
disconnect_unused(cy,id_CO);
// Disconnect unused ports on last CY in chain
// at least id_A1 and id_B1 will be connected
// Reverse direction, must stop if used, then
// rest is used as well
if (!cy->getPort(id_S4) || cy->getPort(id_S4)->users.entries()==0) {
cy->disconnectPort(id_A4);
cy->disconnectPort(id_B4);
disconnect_unused(cy,id_S4);
disconnect_unused(cy,id_A4);
disconnect_unused(cy,id_B4);
} else break;
if (!cy->getPort(id_S3) || cy->getPort(id_S3)->users.entries()==0) {
cy->disconnectPort(id_A3);
cy->disconnectPort(id_B3);
disconnect_unused(cy,id_S3);
disconnect_unused(cy,id_A3);
disconnect_unused(cy,id_B3);
} else break;
if (!cy->getPort(id_S2) || cy->getPort(id_S2)->users.entries()==0) {
cy->disconnectPort(id_A2);
cy->disconnectPort(id_B2);
disconnect_unused(cy,id_S2);
disconnect_unused(cy,id_A2);
disconnect_unused(cy,id_B2);
} else break;
break;
}
@ -721,10 +730,20 @@ void NgUltraPacker::pack_cys(void)
root->constr_children.push_back(cy);
cy->constr_z = PLACE_CY_CHAIN;
}
for(int i=1;i<=4;i++) {
IdString s_port = ctx->idf("S%d",i);
if (!cy->getPort(s_port) || cy->getPort(s_port)->users.entries()==0) {
disconnect_unused(cy, s_port);
}
}
pack_cy_input_and_output(cy, root->name, id_B1, id_S1, PLACE_CY_FE1, lut_only, lut_and_ff, dff_only);
pack_cy_input_and_output(cy, root->name, id_B2, id_S2, PLACE_CY_FE2, lut_only, lut_and_ff, dff_only);
pack_cy_input_and_output(cy, root->name, id_B3, id_S3, PLACE_CY_FE3, lut_only, lut_and_ff, dff_only);
pack_cy_input_and_output(cy, root->name, id_B4, id_S4, PLACE_CY_FE4, lut_only, lut_and_ff, dff_only);
// Must check for B input otherwise we have bogus FEs
if (cy->getPort(id_B2))
pack_cy_input_and_output(cy, root->name, id_B2, id_S2, PLACE_CY_FE2, lut_only, lut_and_ff, dff_only);
if (cy->getPort(id_B3))
pack_cy_input_and_output(cy, root->name, id_B3, id_S3, PLACE_CY_FE3, lut_only, lut_and_ff, dff_only);
if (cy->getPort(id_B4))
pack_cy_input_and_output(cy, root->name, id_B4, id_S4, PLACE_CY_FE4, lut_only, lut_and_ff, dff_only);
NetInfo *net = cy->getPort(id_CI);
if (net) {
if (net->name.in(ctx->id("$PACKER_GND"), ctx->id("$PACKER_VCC"))) {

2
himbaechel/uarch/ng-ultra/pack.h
View File

@ -70,7 +70,7 @@ private:
void pack_xrf_input_and_output(CellInfo *cy, IdString cluster, IdString in_port, IdString out_port, ClusterPlacement placement, int &lut_only, int &lut_and_ff, int &dff_only);
void connect_gnd_if_unconnected(CellInfo *cell, IdString input);
void connect_gnd_if_unconnected(CellInfo *cell, IdString input, bool warn);
void disconnect_if_gnd(CellInfo *cell, IdString input);
void mandatory_param(CellInfo *cell, IdString param);