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Added expose -dff

This commit is contained in:
Clifford Wolf 2014-02-06 15:48:42 +01:00
parent 1c6dea3a0d
commit c526e56747
1 changed files with 44 additions and 1 deletions
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43
passes/sat/expose.cc
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@ -18,6 +18,8 @@
*/ */
#include "kernel/register.h" #include "kernel/register.h"
#include "kernel/celltypes.h"
#include "kernel/sigtools.h"
#include "kernel/rtlil.h" #include "kernel/rtlil.h"
#include "kernel/log.h" #include "kernel/log.h"
@ -57,6 +59,26 @@ static bool compare_cells(RTLIL::Cell *cell1, RTLIL::Cell *cell2)
return true; return true;
} }
static void find_dff_wires(std::set<std::string> &dff_wires, RTLIL::Module *module)
{
CellTypes ct;
ct.setup_internals_mem();
ct.setup_stdcells_mem();
SigMap sigmap(module);
SigPool dffsignals;
for (auto &it : module->cells) {
if (ct.cell_known(it.second->type) && it.second->connections.count("\\Q"))
dffsignals.add(sigmap(it.second->connections.at("\\Q")));
}
for (auto &it : module->wires) {
if (dffsignals.check_any(it.second))
dff_wires.insert(it.first);
}
}
struct ExposePass : public Pass { struct ExposePass : public Pass {
ExposePass() : Pass("expose", "convert internal signals to module ports") { } ExposePass() : Pass("expose", "convert internal signals to module ports") { }
virtual void help() virtual void help()
@ -68,6 +90,9 @@ struct ExposePass : public Pass {
log("This command exposes all selected internal signals of a module as additional\n"); log("This command exposes all selected internal signals of a module as additional\n");
log("outputs.\n"); log("outputs.\n");
log("\n"); log("\n");
log(" -dff\n");
log(" only consider wires that are directly driven by register cell.\n");
log("\n");
log(" -shared\n"); log(" -shared\n");
log(" only expose those signals that are shared ammong the selected modules.\n"); log(" only expose those signals that are shared ammong the selected modules.\n");
log(" this is useful for preparing modules for equivialence checking.\n"); log(" this is useful for preparing modules for equivialence checking.\n");
@ -81,6 +106,7 @@ struct ExposePass : public Pass {
{ {
bool flag_shared = false; bool flag_shared = false;
bool flag_evert = false; bool flag_evert = false;
bool flag_dff = false;
size_t argidx; size_t argidx;
for (argidx = 1; argidx < args.size(); argidx++) for (argidx = 1; argidx < args.size(); argidx++)
@ -93,6 +119,10 @@ struct ExposePass : public Pass {
flag_evert = true; flag_evert = true;
continue; continue;
} }
if (args[argidx] == "-dff") {
flag_dff = true;
continue;
}
break; break;
} }
extra_args(args, argidx, design); extra_args(args, argidx, design);
@ -111,10 +141,15 @@ struct ExposePass : public Pass {
if (!design->selected(module)) if (!design->selected(module))
continue; continue;
std::set<std::string> dff_wires;
if (flag_dff)
find_dff_wires(dff_wires, module);
if (first_module == NULL) if (first_module == NULL)
{ {
for (auto &it : module->wires) for (auto &it : module->wires)
if (design->selected(module, it.second) && consider_wire(it.second)) if (design->selected(module, it.second) && consider_wire(it.second))
if (!flag_dff || dff_wires.count(it.first))
shared_wires.insert(it.first); shared_wires.insert(it.first);
if (flag_evert) if (flag_evert)
@ -143,6 +178,8 @@ struct ExposePass : public Pass {
goto delete_shared_wire; goto delete_shared_wire;
if (!compare_wires(first_module->wires.at(it), wire)) if (!compare_wires(first_module->wires.at(it), wire))
goto delete_shared_wire; goto delete_shared_wire;
if (flag_dff && !dff_wires.count(it))
goto delete_shared_wire;
if (0) if (0)
delete_shared_wire: delete_shared_wire:
@ -186,6 +223,10 @@ struct ExposePass : public Pass {
if (!design->selected(module)) if (!design->selected(module))
continue; continue;
std::set<std::string> dff_wires;
if (flag_dff && !flag_shared)
find_dff_wires(dff_wires, module);
for (auto &it : module->wires) for (auto &it : module->wires)
{ {
if (flag_shared) { if (flag_shared) {
@ -194,6 +235,8 @@ struct ExposePass : public Pass {
} else { } else {
if (!design->selected(module, it.second) || !consider_wire(it.second)) if (!design->selected(module, it.second) || !consider_wire(it.second))
continue; continue;
if (flag_dff && !dff_wires.count(it.first))
continue;
} }
if (!it.second->port_output) { if (!it.second->port_output) {