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splitnets new options

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This commit is contained in:
Alain Dargelas 2025-02-19 09:44:10 -08:00
parent 929c817384
commit f65808aaf4
1 changed files with 30 additions and 12 deletions
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40
passes/cmds/splitnets.cc
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@ -112,6 +112,12 @@ struct SplitnetsPass : public Pass {
log(" -ports\n"); log(" -ports\n");
log(" also split module ports. per default only internal signals are split.\n"); log(" also split module ports. per default only internal signals are split.\n");
log("\n"); log("\n");
log(" -ports_only\n");
log(" Split module ports, but not the internal signals.\n");
log("\n");
log(" -top_only\n");
log(" Split module ports/nets, only at the top level.\n");
log("\n");
log(" -driver\n"); log(" -driver\n");
log(" don't blindly split nets in individual bits. instead look at the driver\n"); log(" don't blindly split nets in individual bits. instead look at the driver\n");
log(" and split nets so that no driver drives only part of a net.\n"); log(" and split nets so that no driver drives only part of a net.\n");
@ -121,6 +127,8 @@ struct SplitnetsPass : public Pass {
{ {
bool flag_ports = false; bool flag_ports = false;
bool flag_driver = false; bool flag_driver = false;
bool flag_ports_only = false;
bool flag_top_only = false;
std::string format = "[]:"; std::string format = "[]:";
log_header(design, "Executing SPLITNETS pass (splitting up multi-bit signals).\n"); log_header(design, "Executing SPLITNETS pass (splitting up multi-bit signals).\n");
@ -136,6 +144,14 @@ struct SplitnetsPass : public Pass {
flag_ports = true; flag_ports = true;
continue; continue;
} }
if (args[argidx] == "-ports_only") {
flag_ports_only = true;
continue;
}
if (args[argidx] == "-top_only") {
flag_top_only = true;
continue;
}
if (args[argidx] == "-driver") { if (args[argidx] == "-driver") {
flag_driver = true; flag_driver = true;
continue; continue;
@ -151,11 +167,12 @@ struct SplitnetsPass : public Pass {
{ {
if (module->has_processes_warn()) if (module->has_processes_warn())
continue; continue;
if (flag_top_only && (design->top_module() != module)) {
continue;
}
SplitnetsWorker worker; SplitnetsWorker worker;
if (flag_ports) if (flag_ports || flag_ports_only) {
{
int normalized_port_factor = 0; int normalized_port_factor = 0;
for (auto wire : module->wires()) for (auto wire : module->wires())
@ -186,7 +203,8 @@ struct SplitnetsPass : public Pass {
for (auto &chunk : sig.chunks()) { for (auto &chunk : sig.chunks()) {
if (chunk.wire == NULL) if (chunk.wire == NULL)
continue; continue;
if (chunk.wire->port_id == 0 || flag_ports) { if (flag_ports_only && (chunk.wire->port_id != 0) ||
((!flag_ports_only) && (chunk.wire->port_id == 0 || flag_ports))) {
if (chunk.offset != 0) if (chunk.offset != 0)
split_wires_at[chunk.wire].insert(chunk.offset); split_wires_at[chunk.wire].insert(chunk.offset);
if (chunk.offset + chunk.width < chunk.wire->width) if (chunk.offset + chunk.width < chunk.wire->width)
@ -203,11 +221,12 @@ struct SplitnetsPass : public Pass {
} }
worker.append_wire(module, it.first, cursor, it.first->width - cursor, format); worker.append_wire(module, it.first, cursor, it.first->width - cursor, format);
} }
} } else {
else
{
for (auto wire : module->wires()) { for (auto wire : module->wires()) {
if (wire->width > 1 && (wire->port_id == 0 || flag_ports) && design->selected(module, wire)) if (flag_ports_only) {
if (wire->width > 1 && (wire->port_id != 0) && design->selected(module, wire))
worker.splitmap[wire] = std::vector<RTLIL::SigBit>();
} else if (wire->width > 1 && (wire->port_id == 0 || flag_ports) && design->selected(module, wire))
worker.splitmap[wire] = std::vector<RTLIL::SigBit>(); worker.splitmap[wire] = std::vector<RTLIL::SigBit>();
} }
@ -218,8 +237,7 @@ struct SplitnetsPass : public Pass {
module->rewrite_sigspecs(worker); module->rewrite_sigspecs(worker);
if (flag_ports) if (flag_ports || flag_ports_only) {
{
for (auto wire : module->wires()) for (auto wire : module->wires())
{ {
if (wire->port_id == 0) if (wire->port_id == 0)
@ -243,7 +261,7 @@ struct SplitnetsPass : public Pass {
delete_wires.insert(it.first); delete_wires.insert(it.first);
module->remove(delete_wires); module->remove(delete_wires);
if (flag_ports) if (flag_ports || flag_ports_only)
module->fixup_ports(); module->fixup_ports();
} }