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authorClifford Wolf <clifford@clifford.at>2014-02-08 21:08:38 +0100
committerClifford Wolf <clifford@clifford.at>2014-02-08 21:08:38 +0100
commit0935e200039c0d1b243102619a6d8d62f7d297aa (patch)
treee49efb176c0299c8b29fa2bbd3dca02d59547ab9 /passes/sat
parent8f9c707a4c64fd0066e52242b6aba9436f17110e (diff)
Implemented expose -evert-dff
Diffstat (limited to 'passes/sat')
-rw-r--r--passes/sat/expose.cc312
1 files changed, 301 insertions, 11 deletions
diff --git a/passes/sat/expose.cc b/passes/sat/expose.cc
index f8401228..f5045a1d 100644
--- a/passes/sat/expose.cc
+++ b/passes/sat/expose.cc
@@ -23,20 +23,34 @@
#include "kernel/rtlil.h"
#include "kernel/log.h"
-static bool consider_wire(RTLIL::Wire *wire)
+struct dff_map_info_t {
+ RTLIL::SigSpec sig_d, sig_clk, sig_arst;
+ bool clk_polarity, arst_polarity;
+ RTLIL::Const arst_value;
+ std::vector<std::string> cells;
+};
+
+struct dff_map_bit_info_t {
+ RTLIL::SigBit bit_d, bit_clk, bit_arst;
+ bool clk_polarity, arst_polarity;
+ RTLIL::State arst_value;
+ RTLIL::Cell *cell;
+};
+
+static bool consider_wire(RTLIL::Wire *wire, std::map<std::string, dff_map_info_t> &dff_dq_map)
{
- if (wire->name[0] == '$')
+ if (wire->name[0] == '$' || dff_dq_map.count(wire->name))
return false;
if (wire->port_input)
return false;
return true;
}
-static bool consider_cell(RTLIL::Design *design, RTLIL::Cell *cell)
+static bool consider_cell(RTLIL::Design *design, std::set<std::string> &dff_cells, RTLIL::Cell *cell)
{
- if (cell->name[0] == '$')
+ if (cell->name[0] == '$' || dff_cells.count(cell->name))
return false;
- if (design->modules.count(cell->type) == 0)
+ if (cell->type.at(0) == '\\' && !design->modules.count(cell->type))
return false;
return true;
}
@@ -79,6 +93,120 @@ static void find_dff_wires(std::set<std::string> &dff_wires, RTLIL::Module *modu
}
}
+static void create_dff_dq_map(std::map<std::string, dff_map_info_t> &map, RTLIL::Design *design, RTLIL::Module *module)
+{
+ std::map<RTLIL::SigBit, dff_map_bit_info_t> bit_info;
+ SigMap sigmap(module);
+
+ for (auto &it : module->cells)
+ {
+ if (!design->selected(module, it.second))
+ continue;
+
+ dff_map_bit_info_t info;
+ info.bit_d = RTLIL::State::Sm;
+ info.bit_clk = RTLIL::State::Sm;
+ info.bit_arst = RTLIL::State::Sm;
+ info.clk_polarity = false;
+ info.arst_polarity = false;
+ info.arst_value = RTLIL::State::Sm;
+ info.cell = it.second;
+
+ if (info.cell->type == "$dff") {
+ info.bit_clk = sigmap(info.cell->connections.at("\\CLK")).to_single_sigbit();
+ info.clk_polarity = info.cell->parameters.at("\\CLK_POLARITY").as_bool();
+ std::vector<RTLIL::SigBit> sig_d = sigmap(info.cell->connections.at("\\D")).to_sigbit_vector();
+ std::vector<RTLIL::SigBit> sig_q = sigmap(info.cell->connections.at("\\Q")).to_sigbit_vector();
+ for (size_t i = 0; i < sig_d.size(); i++) {
+ info.bit_d = sig_d.at(i);
+ bit_info[sig_q.at(i)] = info;
+ }
+ continue;
+ }
+
+ if (info.cell->type == "$adff") {
+ info.bit_clk = sigmap(info.cell->connections.at("\\CLK")).to_single_sigbit();
+ info.bit_arst = sigmap(info.cell->connections.at("\\ARST")).to_single_sigbit();
+ info.clk_polarity = info.cell->parameters.at("\\CLK_POLARITY").as_bool();
+ info.arst_polarity = info.cell->parameters.at("\\ARST_POLARITY").as_bool();
+ std::vector<RTLIL::SigBit> sig_d = sigmap(info.cell->connections.at("\\D")).to_sigbit_vector();
+ std::vector<RTLIL::SigBit> sig_q = sigmap(info.cell->connections.at("\\Q")).to_sigbit_vector();
+ std::vector<RTLIL::State> arst_value = info.cell->parameters.at("\\ARST_VALUE").bits;
+ for (size_t i = 0; i < sig_d.size(); i++) {
+ info.bit_d = sig_d.at(i);
+ info.arst_value = arst_value.at(i);
+ bit_info[sig_q.at(i)] = info;
+ }
+ continue;
+ }
+
+ if (info.cell->type == "$_DFF_N_" || info.cell->type == "$_DFF_P_") {
+ info.bit_clk = sigmap(info.cell->connections.at("\\C")).to_single_sigbit();
+ info.clk_polarity = info.cell->type == "$_DFF_P_";
+ info.bit_d = sigmap(info.cell->connections.at("\\D")).to_single_sigbit();
+ bit_info[sigmap(info.cell->connections.at("\\Q")).to_single_sigbit()] = info;
+ continue;
+ }
+
+ if (info.cell->type.size() == 10 && info.cell->type.substr(0, 6) == "$_DFF_") {
+ info.bit_clk = sigmap(info.cell->connections.at("\\C")).to_single_sigbit();
+ info.bit_arst = sigmap(info.cell->connections.at("\\R")).to_single_sigbit();
+ info.clk_polarity = info.cell->type[6] == 'P';
+ info.arst_polarity = info.cell->type[7] == 'P';
+ info.arst_value = info.cell->type[0] == '1' ? RTLIL::State::S1 : RTLIL::State::S0;
+ info.bit_d = sigmap(info.cell->connections.at("\\D")).to_single_sigbit();
+ bit_info[sigmap(info.cell->connections.at("\\Q")).to_single_sigbit()] = info;
+ continue;
+ }
+ }
+
+ std::map<std::string, dff_map_info_t> empty_dq_map;
+ for (auto &it : module->wires)
+ {
+ if (!consider_wire(it.second, empty_dq_map))
+ continue;
+
+ std::vector<RTLIL::SigBit> bits_q = sigmap(it.second).to_sigbit_vector();
+ std::vector<RTLIL::SigBit> bits_d;
+ std::vector<RTLIL::State> arst_value;
+ std::set<RTLIL::Cell*> cells;
+
+ if (bits_q.empty() || !bit_info.count(bits_q.front()))
+ continue;
+
+ dff_map_bit_info_t ref_info = bit_info.at(bits_q.front());
+ for (auto &bit : bits_q) {
+ if (!bit_info.count(bit))
+ break;
+ dff_map_bit_info_t info = bit_info.at(bit);
+ if (info.bit_clk != ref_info.bit_clk)
+ break;
+ if (info.bit_arst != ref_info.bit_arst)
+ break;
+ if (info.clk_polarity != ref_info.clk_polarity)
+ break;
+ if (info.arst_polarity != ref_info.arst_polarity)
+ break;
+ bits_d.push_back(info.bit_d);
+ arst_value.push_back(info.arst_value);
+ cells.insert(info.cell);
+ }
+
+ if (bits_d.size() != bits_q.size())
+ continue;
+
+ dff_map_info_t info;
+ info.sig_d = bits_d;
+ info.sig_clk = ref_info.bit_clk;
+ info.sig_arst = ref_info.bit_arst;
+ info.clk_polarity = ref_info.clk_polarity;
+ info.arst_polarity = ref_info.arst_polarity;
+ for (auto it : cells)
+ info.cells.push_back(it->name);
+ map[it.first] = info;
+ }
+}
+
struct ExposePass : public Pass {
ExposePass() : Pass("expose", "convert internal signals to module ports") { }
virtual void help()
@@ -101,12 +229,16 @@ struct ExposePass : public Pass {
log(" also turn connections to instances of other modules to additional\n");
log(" inputs and outputs and remove the module instances.\n");
log("\n");
+ log(" -evert-dff\n");
+ log(" turn flip-flops to sets of inputs and outputs.\n");
+ log("\n");
}
virtual void execute(std::vector<std::string> args, RTLIL::Design *design)
{
bool flag_shared = false;
bool flag_evert = false;
bool flag_dff = false;
+ bool flag_evert_dff = false;
size_t argidx;
for (argidx = 1; argidx < args.size(); argidx++)
@@ -123,10 +255,65 @@ struct ExposePass : public Pass {
flag_dff = true;
continue;
}
+ if (args[argidx] == "-evert-dff") {
+ flag_evert_dff = true;
+ continue;
+ }
break;
}
extra_args(args, argidx, design);
+ std::map<RTLIL::Module*, std::map<std::string, dff_map_info_t>> dff_dq_maps;
+ std::map<RTLIL::Module*, std::set<std::string>> dff_cells;
+
+ if (flag_evert_dff)
+ {
+ RTLIL::Module *first_module = NULL;
+ std::set<std::string> shared_dff_wires;
+
+ for (auto &mod_it : design->modules)
+ {
+ if (!design->selected(mod_it.second))
+ continue;
+
+ create_dff_dq_map(dff_dq_maps[mod_it.second], design, mod_it.second);
+
+ if (!flag_shared)
+ continue;
+
+ if (first_module == NULL) {
+ for (auto &it : dff_dq_maps[mod_it.second])
+ shared_dff_wires.insert(it.first);
+ first_module = mod_it.second;
+ } else {
+ std::set<std::string> new_shared_dff_wires;
+ for (auto &it : shared_dff_wires) {
+ if (!dff_dq_maps[mod_it.second].count(it))
+ continue;
+ if (!compare_wires(first_module->wires.at(it), mod_it.second->wires.at(it)))
+ continue;
+ new_shared_dff_wires.insert(it);
+ }
+ shared_dff_wires.swap(new_shared_dff_wires);
+ }
+ }
+
+ if (flag_shared)
+ for (auto &map_it : dff_dq_maps)
+ {
+ std::map<std::string, dff_map_info_t> new_map;
+ for (auto &it : map_it.second)
+ if (shared_dff_wires.count(it.first))
+ new_map[it.first] = it.second;
+ map_it.second.swap(new_map);
+ }
+
+ for (auto &it1 : dff_dq_maps)
+ for (auto &it2 : it1.second)
+ for (auto &it3 : it2.second.cells)
+ dff_cells[it1.first].insert(it3);
+ }
+
std::set<std::string> shared_wires, shared_cells;
std::set<std::string> used_names;
@@ -148,13 +335,13 @@ struct ExposePass : public Pass {
if (first_module == NULL)
{
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, dff_dq_maps[module]))
if (!flag_dff || dff_wires.count(it.first))
shared_wires.insert(it.first);
if (flag_evert)
for (auto &it : module->cells)
- if (design->selected(module, it.second) && consider_cell(design, it.second))
+ if (design->selected(module, it.second) && consider_cell(design, dff_cells[module], it.second))
shared_cells.insert(it.first);
first_module = module;
@@ -174,7 +361,7 @@ struct ExposePass : public Pass {
if (!design->selected(module, wire))
goto delete_shared_wire;
- if (!consider_wire(wire))
+ if (!consider_wire(wire, dff_dq_maps[module]))
goto delete_shared_wire;
if (!compare_wires(first_module->wires.at(it), wire))
goto delete_shared_wire;
@@ -198,7 +385,7 @@ struct ExposePass : public Pass {
if (!design->selected(module, cell))
goto delete_shared_cell;
- if (!consider_cell(design, cell))
+ if (!consider_cell(design, dff_cells[module], cell))
goto delete_shared_cell;
if (!compare_cells(first_module->cells.at(it), cell))
goto delete_shared_cell;
@@ -233,7 +420,7 @@ struct ExposePass : public Pass {
if (shared_wires.count(it.first) == 0)
continue;
} else {
- if (!design->selected(module, it.second) || !consider_wire(it.second))
+ if (!design->selected(module, it.second) || !consider_wire(it.second, dff_dq_maps[module]))
continue;
if (flag_dff && !dff_wires.count(it.first))
continue;
@@ -245,6 +432,109 @@ struct ExposePass : public Pass {
}
}
+ SigMap sigmap(module);
+ std::set<RTLIL::SigBit> set_q_bits;
+
+ for (auto &dq : dff_dq_maps[module])
+ {
+ if (!module->wires.count(dq.first))
+ continue;
+
+ RTLIL::Wire *wire = module->wires.at(dq.first);
+ std::set<RTLIL::SigBit> wire_bits_set = sigmap(wire).to_sigbit_set();
+ std::vector<RTLIL::SigBit> wire_bits_vec = sigmap(wire).to_sigbit_vector();
+
+ dff_map_info_t &info = dq.second;
+
+ RTLIL::Wire *wire_dummy_q = new RTLIL::Wire;
+ wire_dummy_q->name = NEW_ID;
+ wire_dummy_q->width = 0;
+ module->add(wire_dummy_q);
+
+ for (auto &cell_name : info.cells) {
+ RTLIL::Cell *cell = module->cells.at(cell_name);
+ std::vector<RTLIL::SigBit> cell_q_bits = sigmap(cell->connections.at("\\Q")).to_sigbit_vector();
+ for (auto &bit : cell_q_bits)
+ if (wire_bits_set.count(bit))
+ bit = RTLIL::SigBit(wire_dummy_q, wire_dummy_q->width++);
+ cell->connections.at("\\Q") = cell_q_bits;
+ }
+
+ RTLIL::Wire *wire_q = new RTLIL::Wire;
+ wire_q->name = wire->name + ".q";
+ wire_q->width = wire->width;
+ wire_q->port_input = true;
+ log("New module port: %s/%s\n", RTLIL::id2cstr(module->name), RTLIL::id2cstr(wire_q->name));
+ module->add(wire_q);
+
+ RTLIL::SigSig connect_q;
+ for (size_t i = 0; i < wire_bits_vec.size(); i++) {
+ if (set_q_bits.count(wire_bits_vec[i]))
+ continue;
+ connect_q.first.append(wire_bits_vec[i]);
+ connect_q.second.append(RTLIL::SigBit(wire_q, i));
+ set_q_bits.insert(wire_bits_vec[i]);
+ }
+ module->connections.push_back(connect_q);
+
+ RTLIL::Wire *wire_d = new RTLIL::Wire;
+ wire_d->name = wire->name + ".d";
+ wire_d->width = wire->width;
+ wire_d->port_output = true;
+ log("New module port: %s/%s\n", RTLIL::id2cstr(module->name), RTLIL::id2cstr(wire_d->name));
+ module->add(wire_d);
+ module->connections.push_back(RTLIL::SigSig(wire_d, info.sig_d));
+
+ RTLIL::Wire *wire_c = new RTLIL::Wire;
+ wire_c->name = wire->name + ".c";
+ wire_c->port_output = true;
+ log("New module port: %s/%s\n", RTLIL::id2cstr(module->name), RTLIL::id2cstr(wire_c->name));
+ module->add(wire_c);
+ if (info.clk_polarity) {
+ module->connections.push_back(RTLIL::SigSig(wire_c, info.sig_clk));
+ } else {
+ RTLIL::Cell *c = new RTLIL::Cell;
+ c->name = NEW_ID;
+ c->type = "$not";
+ c->parameters["\\A_SIGNED"] = 0;
+ c->parameters["\\A_WIDTH"] = 1;
+ c->parameters["\\Y_WIDTH"] = 1;
+ c->connections["\\A"] = info.sig_clk;
+ c->connections["\\Y"] = wire_c;
+ module->add(c);
+ }
+
+ if (info.sig_arst != RTLIL::State::Sm)
+ {
+ RTLIL::Wire *wire_r = new RTLIL::Wire;
+ wire_r->name = wire->name + ".r";
+ wire_r->port_output = true;
+ log("New module port: %s/%s\n", RTLIL::id2cstr(module->name), RTLIL::id2cstr(wire_r->name));
+ module->add(wire_r);
+ if (info.arst_polarity) {
+ module->connections.push_back(RTLIL::SigSig(wire_r, info.sig_arst));
+ } else {
+ RTLIL::Cell *c = new RTLIL::Cell;
+ c->name = NEW_ID;
+ c->type = "$not";
+ c->parameters["\\A_SIGNED"] = 0;
+ c->parameters["\\A_WIDTH"] = 1;
+ c->parameters["\\Y_WIDTH"] = 1;
+ c->connections["\\A"] = info.sig_arst;
+ c->connections["\\Y"] = wire_r;
+ module->add(c);
+ }
+
+ RTLIL::Wire *wire_v = new RTLIL::Wire;
+ wire_v->name = wire->name + ".v";
+ wire_v->width = wire->width;
+ wire_v->port_output = true;
+ log("New module port: %s/%s\n", RTLIL::id2cstr(module->name), RTLIL::id2cstr(wire_v->name));
+ module->add(wire_v);
+ module->connections.push_back(RTLIL::SigSig(wire_v, info.arst_value));
+ }
+ }
+
if (flag_evert)
{
std::vector<std::string> delete_cells;
@@ -255,7 +545,7 @@ struct ExposePass : public Pass {
if (shared_cells.count(it.first) == 0)
continue;
} else {
- if (!design->selected(module, it.second) || !consider_cell(design, it.second))
+ if (!design->selected(module, it.second) || !consider_cell(design, dff_cells[module], it.second))
continue;
}