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-rw-r--r--kernel/cost.h51
1 files changed, 49 insertions, 2 deletions
diff --git a/kernel/cost.h b/kernel/cost.h
index 7d7822fa0..41a09eb63 100644
--- a/kernel/cost.h
+++ b/kernel/cost.h
@@ -26,8 +26,55 @@ YOSYS_NAMESPACE_BEGIN
int get_cell_cost(RTLIL::Cell *cell, dict<RTLIL::IdString, int> *mod_cost_cache = nullptr);
-int get_cell_cost(RTLIL::IdString type, const dict<RTLIL::IdString, RTLIL::Const> &parameters = dict<RTLIL::IdString, RTLIL::Const>(),
- RTLIL::Design *design = nullptr, dict<RTLIL::IdString, int> *mod_cost_cache = nullptr);
+inline int get_cell_cost(RTLIL::IdString type, const dict<RTLIL::IdString, RTLIL::Const> &parameters = dict<RTLIL::IdString, RTLIL::Const>(),
+ RTLIL::Design *design = nullptr, dict<RTLIL::IdString, int> *mod_cost_cache = nullptr)
+{
+ static dict<RTLIL::IdString, int> gate_cost = {
+ { "$_BUF_", 1 },
+ { "$_NOT_", 2 },
+ { "$_AND_", 4 },
+ { "$_NAND_", 4 },
+ { "$_OR_", 4 },
+ { "$_NOR_", 4 },
+ { "$_ANDNOT_", 4 },
+ { "$_ORNOT_", 4 },
+ { "$_XOR_", 8 },
+ { "$_XNOR_", 8 },
+ { "$_AOI3_", 6 },
+ { "$_OAI3_", 6 },
+ { "$_AOI4_", 8 },
+ { "$_OAI4_", 8 },
+ { "$_MUX_", 4 }
+ };
+
+ if (gate_cost.count(type))
+ return gate_cost.at(type);
+
+ if (parameters.empty() && design && design->module(type))
+ {
+ RTLIL::Module *mod = design->module(type);
+
+ if (mod->attributes.count("\\cost"))
+ return mod->attributes.at("\\cost").as_int();
+
+ dict<RTLIL::IdString, int> local_mod_cost_cache;
+ if (mod_cost_cache == nullptr)
+ mod_cost_cache = &local_mod_cost_cache;
+
+ if (mod_cost_cache->count(mod->name))
+ return mod_cost_cache->at(mod->name);
+
+ int module_cost = 1;
+ for (auto c : mod->cells())
+ module_cost += get_cell_cost(c, mod_cost_cache);
+
+ (*mod_cost_cache)[mod->name] = module_cost;
+ return module_cost;
+ }
+
+ log_warning("Can't determine cost of %s cell (%d parameters).\n", log_id(type), GetSize(parameters));
+ return 1;
+}
inline int get_cell_cost(RTLIL::Cell *cell, dict<RTLIL::IdString, int> *mod_cost_cache)
{