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Added opt_share -share_all

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This commit is contained in:
Clifford Wolf 2015-05-31 14:24:34 +02:00
parent 09ef279b60
commit 08f9b38a9c
2 changed files with 32 additions and 16 deletions
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17
passes/opt/opt.cc
View file

@ -38,12 +38,12 @@ struct OptPass : public Pass {
log("passes in the following order:\n");
log("\n");
log(" opt_const [-mux_undef] [-mux_bool] [-undriven] [-fine] [-full] [-keepdc]\n");
log(" opt_share -nomux\n");
log(" opt_share [-share_all] -nomux\n");
log("\n");
log(" do\n");
log(" opt_muxtree\n");
log(" opt_reduce [-fine] [-full]\n");
log(" opt_share\n");
log(" opt_share [-share_all]\n");
log(" opt_rmdff\n");
log(" opt_clean [-purge]\n");
log(" opt_const [-mux_undef] [-mux_bool] [-undriven] [-fine] [-full] [-keepdc]\n");
@ -53,7 +53,7 @@ struct OptPass : public Pass {
log("\n");
log(" do\n");
log(" opt_const [-mux_undef] [-mux_bool] [-undriven] [-fine] [-full] [-keepdc]\n");
log(" opt_share\n");
log(" opt_share [-share_all]\n");
log(" opt_rmdff\n");
log(" opt_clean [-purge]\n");
log(" while <changed design in opt_rmdff>\n");
@ -68,6 +68,7 @@ struct OptPass : public Pass {
std::string opt_clean_args;
std::string opt_const_args;
std::string opt_reduce_args;
std::string opt_share_args;
bool fast_mode = false;
log_header("Executing OPT pass (performing simple optimizations).\n");
@ -105,6 +106,10 @@ struct OptPass : public Pass {
opt_const_args += " -keepdc";
continue;
}
if (args[argidx] == "-share_all") {
opt_share_args += " -share_all";
continue;
}
if (args[argidx] == "-fast") {
fast_mode = true;
continue;
@ -117,7 +122,7 @@ struct OptPass : public Pass {
{
while (1) {
Pass::call(design, "opt_const" + opt_const_args);
Pass::call(design, "opt_share");
Pass::call(design, "opt_share" + opt_share_args);
design->scratchpad_unset("opt.did_something");
Pass::call(design, "opt_rmdff");
if (design->scratchpad_get_bool("opt.did_something") == false)
@ -130,12 +135,12 @@ struct OptPass : public Pass {
else
{
Pass::call(design, "opt_const" + opt_const_args);
Pass::call(design, "opt_share -nomux");
Pass::call(design, "opt_share -nomux" + opt_share_args);
while (1) {
design->scratchpad_unset("opt.did_something");
Pass::call(design, "opt_muxtree");
Pass::call(design, "opt_reduce" + opt_reduce_args);
Pass::call(design, "opt_share");
Pass::call(design, "opt_share" + opt_share_args);
Pass::call(design, "opt_rmdff");
Pass::call(design, "opt_clean" + opt_clean_args);
Pass::call(design, "opt_const" + opt_const_args);

31
passes/opt/opt_share.cc
View file

@ -37,6 +37,7 @@ struct OptShareWorker
RTLIL::Module *module;
SigMap assign_map;
SigMap dff_init_map;
bool mode_share_all;
CellTypes ct;
int total_count;
@ -93,7 +94,7 @@ struct OptShareWorker
}
for (auto &it : *conn) {
if (ct.cell_output(cell->type, it.first))
if (cell->output(it.first))
continue;
RTLIL::SigSpec sig = it.second;
assign_map.apply(sig);
@ -137,14 +138,14 @@ struct OptShareWorker
dict<RTLIL::IdString, RTLIL::SigSpec> conn2 = cell2->connections();
for (auto &it : conn1) {
if (ct.cell_output(cell1->type, it.first))
if (cell1->output(it.first))
it.second = RTLIL::SigSpec();
else
assign_map.apply(it.second);
}
for (auto &it : conn2) {
if (ct.cell_output(cell2->type, it.first))
if (cell2->output(it.first))
it.second = RTLIL::SigSpec();
else
assign_map.apply(it.second);
@ -197,7 +198,7 @@ struct OptShareWorker
if (cell1->type != cell2->type)
return cell1->type < cell2->type;
if (!ct.cell_known(cell1->type))
if ((!mode_share_all && !ct.cell_known(cell1->type)) || !cell1->known())
return cell1 < cell2;
if (cell1->has_keep_attr() || cell2->has_keep_attr())
@ -218,8 +219,8 @@ struct OptShareWorker
}
};
OptShareWorker(RTLIL::Design *design, RTLIL::Module *module, bool mode_nomux) :
design(design), module(module), assign_map(module)
OptShareWorker(RTLIL::Design *design, RTLIL::Module *module, bool mode_nomux, bool mode_share_all) :
design(design), module(module), assign_map(module), mode_share_all(mode_share_all)
{
total_count = 0;
ct.setup_internals();
@ -249,7 +250,9 @@ struct OptShareWorker
std::vector<RTLIL::Cell*> cells;
cells.reserve(module->cells_.size());
for (auto &it : module->cells_) {
if (ct.cell_known(it.second->type) && design->selected(module, it.second))
if (!design->selected(module, it.second))
continue;
if (ct.cell_known(it.second->type) || (mode_share_all && it.second->known()))
cells.push_back(it.second);
}
@ -261,7 +264,7 @@ struct OptShareWorker
did_something = true;
log(" Cell `%s' is identical to cell `%s'.\n", cell->name.c_str(), sharemap[cell]->name.c_str());
for (auto &it : cell->connections()) {
if (ct.cell_output(cell->type, it.first)) {
if (cell->output(it.first)) {
RTLIL::SigSpec other_sig = sharemap[cell]->getPort(it.first);
log(" Redirecting output %s: %s = %s\n", it.first.c_str(),
log_signal(it.second), log_signal(other_sig));
@ -287,7 +290,7 @@ struct OptSharePass : public Pass {
{
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
log("\n");
log(" opt_share [-nomux] [selection]\n");
log(" opt_share [options] [selection]\n");
log("\n");
log("This pass identifies cells with identical type and input signals. Such cells\n");
log("are then merged to one cell.\n");
@ -295,12 +298,16 @@ struct OptSharePass : public Pass {
log(" -nomux\n");
log(" Do not merge MUX cells.\n");
log("\n");
log(" -share_all\n");
log(" Operate on all cell types, not just built-in types.\n");
log("\n");
}
virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
{
log_header("Executing OPT_SHARE pass (detect identical cells).\n");
bool mode_nomux = false;
bool mode_share_all = false;
size_t argidx;
for (argidx = 1; argidx < args.size(); argidx++) {
@ -309,13 +316,17 @@ struct OptSharePass : public Pass {
mode_nomux = true;
continue;
}
if (arg == "-share_all") {
mode_share_all = true;
continue;
}
break;
}
extra_args(args, argidx, design);
int total_count = 0;
for (auto module : design->selected_modules()) {
OptShareWorker worker(design, module, mode_nomux);
OptShareWorker worker(design, module, mode_nomux, mode_share_all);
total_count += worker.total_count;
}