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Test passtrough concept

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This commit is contained in:
Miodrag Milanovic 2025-12-25 10:23:45 +01:00 committed by Lofty
parent 4674a97664
commit 9acc794661
4 changed files with 14 additions and 0 deletions
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1
himbaechel/uarch/gatemate/extra_data.h
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@ -85,6 +85,7 @@ enum MuxFlags
MUX_VISIBLE = 2,
MUX_CONFIG = 4,
MUX_ROUTING = 8,
MUX_PASSTROUGH = 16,
};
enum PipExtra

9
himbaechel/uarch/gatemate/gatemate.cc
View File

@ -308,6 +308,7 @@ void GateMateImpl::postPlace()
repack();
ctx->assignArchInfo();
used_cpes.resize(ctx->getGridDimX() * ctx->getGridDimY());
passtrough.resize(ctx->getGridDimX() * ctx->getGridDimY());
for (auto &cell : ctx->cells) {
// We need to skip CPE_MULT since using CP outputs is mandatory
// even if output is actually not connected
@ -317,11 +318,19 @@ void GateMateImpl::postPlace()
marked_used = true;
if (marked_used)
used_cpes[cell.second.get()->bel.tile] = true;
int cy2_i = int_or_default(cell.second->params, id_C_CY2_I, 0);
if (cell.second.get()->type == id_CPE_MULT || cy2_i == 1)
passtrough[cell.second.get()->bel.tile] = true;
}
}
bool GateMateImpl::checkPipAvail(PipId pip) const
{
const auto &extra_data = *pip_extra_data(pip);
if (extra_data.type == PipExtra::PIP_EXTRA_MUX && (extra_data.flags & MUX_PASSTROUGH)) {
//printf("pip: %s\n",ctx->getPipName(pip)[1].c_str(ctx));
if (passtrough[pip.tile])
return false;
}
if (extra_data.type != PipExtra::PIP_EXTRA_MUX || (extra_data.flags & MUX_ROUTING) == 0)
return true;
if (used_cpes[pip.tile])

1
himbaechel/uarch/gatemate/gatemate.h
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@ -97,6 +97,7 @@ struct GateMateImpl : HimbaechelAPI
pool<IdString> multiplier_zero_drivers;
std::vector<CellInfo *> multipliers;
std::vector<bool> used_cpes;
std::vector<bool> passtrough;
int fpga_mode;
int timing_mode;
std::map<const NetInfo *, int> global_signals;

3
himbaechel/uarch/gatemate/gen/arch_gen.py
View File

@ -31,6 +31,7 @@ MUX_INVERT = 1
MUX_VISIBLE = 2
MUX_CONFIG = 4
MUX_ROUTING = 8
MUX_PASSTROUGH = 16
parser = argparse.ArgumentParser()
parser.add_argument("--lib", help="Project Peppercorn python database script path", type=str, required=True)
@ -310,6 +311,8 @@ def main():
plane = int(mux.name[10:12])
if mux.name == "CPE.C_SN":
mux_flags |= MUX_ROUTING
if mux.name == "PASS":
mux_flags |= MUX_PASSTROUGH
pp.extra_data = PipExtraData(PIP_EXTRA_MUX, ch.strs.id(mux.name), mux.bits, mux.value, mux_flags, plane)
if type_name in new_wires:
for wire in sorted(new_wires[type_name]):