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Fixes to enable keep_hierarchy

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This commit is contained in:
Alain Dargelas 2025-03-11 10:26:02 -07:00
parent 4d4e574ebb
commit 8b928a8274
2 changed files with 15 additions and 2 deletions
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13
kernel/cost.cc
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@ -101,6 +101,13 @@ static bool is_free(RTLIL::IdString type)
type.in(ID($specrule), ID($specify2), ID($specify3)));
}
static bool is_mem(RTLIL::IdString type)
{
return (
// tags
type.in(ID($memrd), ID($memrd_v2), ID($memwr), ID($memwr_v2), ID($meminit), ID($meminit_v2), ID($mem), ID($mem_v2)));
}
unsigned int max_inp_width(RTLIL::Cell *cell)
{
unsigned int max = 0;
@ -186,8 +193,12 @@ unsigned int CellCosts::get(RTLIL::Cell *cell)
} else if (is_free(cell->type)) {
log_debug("%s is free\n", cell->name.c_str());
return 0;
} else if (is_mem(cell->type)) {
// SILIMATE: Memory cells have no bearing on cross module optimizations
log_debug("%s is mem\n", cell->name.c_str());
return 1;
}
// TODO: $fsm $mem.* $macc
// TODO: $fsm $macc
// ignored: $pow
log_warning("Can't determine cost of %s cell (%d parameters).\n", log_id(cell->type), GetSize(cell->parameters));

4
passes/hierarchy/keep_hierarchy.cc
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@ -42,7 +42,9 @@ struct ThresholdHierarchyKeeping {
return 0;
if (module->get_blackbox_attribute())
log_error("Missing cost information on instanced blackbox %s\n", log_id(module));
// SILIMATE: Blackboxes have no bearing on cross module optimizations
// log_error("Missing cost information on instanced blackbox %s\n", log_id(module));
return 1;
if (done.count(module))
return done.at(module);