Next-generation FPGA SoC toolkit
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diff --git a/backends/verilog/verilog_backend.cc b/backends/verilog/verilog_backend.cc
index 83d83f48..ef6f102c 100644
--- a/backends/verilog/verilog_backend.cc
+++ b/backends/verilog/verilog_backend.cc
@@ -25,6 +25,7 @@
#include "kernel/celltypes.h"
#include "kernel/log.h"
#include "kernel/sigtools.h"
+#include "kernel/modtools.h"
#include <string>
#include <sstream>
#include <set>
@@ -33,15 +34,17 @@
USING_YOSYS_NAMESPACE
PRIVATE_NAMESPACE_BEGIN
-bool verbose, norename, noattr, attr2comment, noexpr, nodec, nohex, nostr, defparam, decimal, siminit;
+bool verbose, norename, noattr, attr2comment, noexpr, nodec, noinline, nohex, nostr, defparam, decimal, siminit;
int auto_name_counter, auto_name_offset, auto_name_digits;
std::map<RTLIL::IdString, int> auto_name_map;
std::set<RTLIL::IdString> reg_wires, reg_ct;
+std::map<RTLIL::Wire*, int> proc_consumed_wires;
std::string auto_prefix;
RTLIL::Module *active_module;
dict<RTLIL::SigBit, RTLIL::State> active_initdata;
SigMap active_sigmap;
+ModIndex active_modindex;
void reset_auto_counter_id(RTLIL::IdString id, bool may_rename)
{
@@ -183,6 +186,72 @@ bool is_reg_wire(RTLIL::SigSpec sig, std::string &reg_name)
return true;
}
+bool can_inline_cell_expr(RTLIL::Cell *cell)
+{
+ static pool<IdString> inlinable_cells = {
+ "$not", "$pos", "$neg",
+ "$and", "$or", "$xor", "$xnor",
+ "$reduce_and", "$reduce_or", "$reduce_xor", "$reduce_xnor", "$reduce_bool",
+ "$shl", "$shr", "$sshl", "$sshr",
+ "$lt", "$le", "$eq", "$ne", "$eqx", "$nex", "$ge", "$gt",
+ "$add", "$sub", "$mul", "$div", "$mod", "$pow",
+ "$logic_not", "$logic_and", "$logic_or",
+ "$mux"
+ };
+
+ if (noinline)
+ return false;
+
+ if (!inlinable_cells.count(cell->type))
+ return false;
+
+ const RTLIL::SigSpec &output = cell->getPort("\\Y");
+ if (!output.is_wire())
+ return false;
+
+ RTLIL::Wire *output_wire = output.as_wire();
+ if (output_wire->port_id || (!noattr && output_wire->attributes.size()))
+ return false;
+
+ pool<ModIndex::PortInfo> ports = active_modindex.query_ports(output[0]);
+ if (proc_consumed_wires[output_wire] == 1 && ports.size() == 1)
+ return true;
+
+ if (proc_consumed_wires[output_wire] == 0 && ports.size() == 2)
+ {
+ auto port1 = ports.pop();
+ auto port2 = ports.pop();
+ return port1.cell->getPort(port1.port).size() ==
+ port2.cell->getPort(port2.port).size();
+ }
+
+ return false;
+}
+
+bool can_inline_wire(RTLIL::Wire *wire)
+{
+ if (noinline)
+ return false;
+
+ RTLIL::SigSpec wire_spec = RTLIL::SigSpec(wire);
+ if (wire_spec.empty())
+ return false;
+
+ pool<ModIndex::PortInfo> ports = active_modindex.query_ports(wire_spec[0]);
+ if (ports.size() > 2)
+ return false;
+
+ for (auto &port_info : ports)
+ {
+ if (port_info.cell->name[0] == '$' && port_info.port == "\\Y")
+ {
+ if (can_inline_cell_expr(port_info.cell))
+ return true;
+ }
+ }
+ return false;
+}
+
void dump_const(std::ostream &f, const RTLIL::Const &data, int width = -1, int offset = 0, bool no_decimal = false, bool set_signed = false, bool escape_comment = false)
{
if (width < 0)
@@ -313,13 +382,29 @@ void dump_reg_init(std::ostream &f, SigSpec sig)
}
}
+bool dump_cell_expr(std::ostream &f, std::string indent, RTLIL::Cell *cell, bool do_inline);
+
void dump_sigchunk(std::ostream &f, const RTLIL::SigChunk &chunk, bool no_decimal = false)
{
if (chunk.wire == NULL) {
dump_const(f, chunk.data, chunk.width, chunk.offset, no_decimal);
} else {
if (chunk.width == chunk.wire->width && chunk.offset == 0) {
- f << stringf("%s", id(chunk.wire->name).c_str());
+ if (can_inline_wire(chunk.wire))
+ {
+ f << "(";
+ pool<ModIndex::PortInfo> ports = active_modindex.query_ports(SigSpec(chunk)[0]);
+ for (auto &port_info : ports)
+ {
+ if (port_info.port == "\\Y")
+ dump_cell_expr(f, "", port_info.cell, true);
+ }
+ f << ")";
+ }
+ else
+ {
+ f << stringf("%s", id(chunk.wire->name).c_str());
+ }
} else if (chunk.width == 1) {
if (chunk.wire->upto)
f << stringf("%s[%d]", id(chunk.wire->name).c_str(), (chunk.wire->width - chunk.offset - 1) + chunk.wire->start_offset);
@@ -372,6 +457,9 @@ void dump_attributes(std::ostream &f, std::string indent, dict<RTLIL::IdString,
void dump_wire(std::ostream &f, std::string indent, RTLIL::Wire *wire)
{
+ if (can_inline_wire(wire))
+ return;
+
dump_attributes(f, indent, wire->attributes);
#if 0
if (wire->port_input && !wire->port_output)
@@ -464,30 +552,54 @@ no_special_reg_name:
}
}
-void dump_cell_expr_uniop(std::ostream &f, std::string indent, RTLIL::Cell *cell, std::string op)
+void dump_cell_expr_uniop(std::ostream &f, std::string indent, RTLIL::Cell *cell, std::string op, bool do_inline)
{
- f << stringf("%s" "assign ", indent.c_str());
- dump_sigspec(f, cell->getPort("\\Y"));
- f << stringf(" = %s ", op.c_str());
+ if (!do_inline)
+ {
+ f << stringf("%s" "assign ", indent.c_str());
+ dump_sigspec(f, cell->getPort("\\Y"));
+ f << stringf(" = ");
+ }
+ f << stringf("%s ", op.c_str());
dump_attributes(f, "", cell->attributes, ' ');
dump_cell_expr_port(f, cell, "A", true);
- f << stringf(";\n");
+ if (!do_inline)
+ {
+ f << stringf(";\n");
+ }
}
-void dump_cell_expr_binop(std::ostream &f, std::string indent, RTLIL::Cell *cell, std::string op)
+void dump_cell_expr_binop(std::ostream &f, std::string indent, RTLIL::Cell *cell, std::string op, bool do_inline)
{
- f << stringf("%s" "assign ", indent.c_str());
- dump_sigspec(f, cell->getPort("\\Y"));
- f << stringf(" = ");
+ if (!do_inline)
+ {
+ f << stringf("%s" "assign ", indent.c_str());
+ dump_sigspec(f, cell->getPort("\\Y"));
+ f << stringf(" = ");
+ }
+ else
+ {
+ f << stringf("(");
+ }
dump_cell_expr_port(f, cell, "A", true);
f << stringf(" %s ", op.c_str());
dump_attributes(f, "", cell->attributes, ' ');
dump_cell_expr_port(f, cell, "B", true);
- f << stringf(";\n");
+ if (!do_inline)
+ {
+ f << stringf(";\n");
+ }
+ else
+ {
+ f << stringf(")");
+ }
}
-bool dump_cell_expr(std::ostream &f, std::string indent, RTLIL::Cell *cell)
+bool dump_cell_expr(std::ostream &f, std::string indent, RTLIL::Cell *cell, bool do_inline)
{
+ if (can_inline_cell_expr(cell) && !do_inline)
+ return true;
+
if (cell->type == "$_NOT_") {
f << stringf("%s" "assign ", indent.c_str());
dump_sigspec(f, cell->getPort("\\Y"));
@@ -658,9 +770,9 @@ bool dump_cell_expr(std::ostream &f, std::string indent, RTLIL::Cell *cell)
}
#define HANDLE_UNIOP(_type, _operator) \
- if (cell->type ==_type) { dump_cell_expr_uniop(f, indent, cell, _operator); return true; }
+ if (cell->type ==_type) { dump_cell_expr_uniop(f, indent, cell, _operator, do_inline); return true; }
#define HANDLE_BINOP(_type, _operator) \
- if (cell->type ==_type) { dump_cell_expr_binop(f, indent, cell, _operator); return true; }
+ if (cell->type ==_type) { dump_cell_expr_binop(f, indent, cell, _operator, do_inline); return true; }
HANDLE_UNIOP("$not", "~")
HANDLE_UNIOP("$pos", "+")
@@ -756,16 +868,30 @@ bool dump_cell_expr(std::ostream &f, std::string indent, RTLIL::Cell *cell)
if (cell->type == "$mux")
{
- f << stringf("%s" "assign ", indent.c_str());
- dump_sigspec(f, cell->getPort("\\Y"));
- f << stringf(" = ");
+ if (!do_inline)
+ {
+ f << stringf("%s" "assign ", indent.c_str());
+ dump_sigspec(f, cell->getPort("\\Y"));
+ f << stringf(" = ");
+ }
+ else
+ {
+ f << stringf("(");
+ }
dump_sigspec(f, cell->getPort("\\S"));
f << stringf(" ? ");
dump_attributes(f, "", cell->attributes, ' ');
dump_sigspec(f, cell->getPort("\\B"));
f << stringf(" : ");
dump_sigspec(f, cell->getPort("\\A"));
- f << stringf(";\n");
+ if (!do_inline)
+ {
+ f << stringf(";\n");
+ }
+ else
+ {
+ f << stringf(")");
+ }
return true;
}
@@ -1243,7 +1369,7 @@ bool dump_cell_expr(std::ostream &f, std::string indent, RTLIL::Cell *cell)
void dump_cell(std::ostream &f, std::string indent, RTLIL::Cell *cell)
{
if (cell->type[0] == '$' && !noexpr) {
- if (dump_cell_expr(f, indent, cell))
+ if (dump_cell_expr(f, indent, cell, false))
return;
}
@@ -1400,25 +1526,42 @@ void dump_proc_switch(std::ostream &f, std::string indent, RTLIL::SwitchRule *sw
void case_body_find_regs(RTLIL::CaseRule *cs)
{
for (auto it = cs->switches.begin(); it != cs->switches.end(); ++it)
- for (auto it2 = (*it)->cases.begin(); it2 != (*it)->cases.end(); it2++)
- case_body_find_regs(*it2);
+ {
+ for (auto &c : (*it)->signal.chunks())
+ if (c.wire != NULL && c.offset == 0 && c.width == c.wire->width)
+ proc_consumed_wires[c.wire]++;
+ for (auto it2 = (*it)->cases.begin(); it2 != (*it)->cases.end(); it2++)
+ case_body_find_regs(*it2);
+ }
- for (auto it = cs->actions.begin(); it != cs->actions.end(); ++it) {
+ for (auto it = cs->actions.begin(); it != cs->actions.end(); ++it)
+ {
for (auto &c : it->first.chunks())
+ {
if (c.wire != NULL)
reg_wires.insert(c.wire->name);
+ for (auto &c : it->second.chunks())
+ if (c.wire != NULL && c.offset == 0 && c.width == c.wire->width)
+ proc_consumed_wires[c.wire]++;
+ }
}
}
-void dump_process(std::ostream &f, std::string indent, RTLIL::Process *proc, bool find_regs = false)
+void dump_process(std::ostream &f, std::string indent, RTLIL::Process *proc, bool sweep = false)
{
- if (find_regs) {
+ if (sweep) {
case_body_find_regs(&proc->root_case);
for (auto it = proc->syncs.begin(); it != proc->syncs.end(); ++it)
- for (auto it2 = (*it)->actions.begin(); it2 != (*it)->actions.end(); it2++) {
- for (auto &c : it2->first.chunks())
- if (c.wire != NULL)
- reg_wires.insert(c.wire->name);
+ {
+ for (auto it2 = (*it)->actions.begin(); it2 != (*it)->actions.end(); it2++)
+ {
+ for (auto &c : it2->first.chunks())
+ if (c.wire != NULL)
+ reg_wires.insert(c.wire->name);
+ for (auto &c : it2->second.chunks())
+ if (c.wire != NULL && c.offset == 0 && c.width == c.wire->width)
+ proc_consumed_wires[c.wire]++;
+ }
}
return;
}
@@ -1487,9 +1630,11 @@ void dump_process(std::ostream &f, std::string indent, RTLIL::Process *proc, boo
void dump_module(std::ostream &f, std::string indent, RTLIL::Module *module)
{
reg_wires.clear();
+ proc_consumed_wires.clear();
reset_auto_counter(module);
active_module = module;
active_sigmap.set(module);
+ active_modindex = ModIndex(module);
active_initdata.clear();
for (auto wire : module->wires())
@@ -1575,6 +1720,7 @@ void dump_module(std::ostream &f, std::string indent, RTLIL::Module *module)
f << stringf("%s" "endmodule\n", indent.c_str());
active_module = NULL;
+ active_modindex = ModIndex();
active_sigmap.clear();
active_initdata.clear();
}
@@ -1605,7 +1751,12 @@ struct VerilogBackend : public Backend {
log("\n");
log(" -noexpr\n");
log(" without this option all internal cells are converted to Verilog\n");
- log(" expressions.\n");
+ log(" expressions. implies -noinline.\n");
+ log("\n");
+ log(" -noinline\n");
+ log(" without this option all internal cells driving a wire connected to\n");
+ log(" a single internal cell are inlined into that cell and the wire is\n");
+ log(" omitted.\n");
log("\n");
log(" -siminit\n");
log(" add initial statements with hierarchical refs to initialize FFs when\n");
@@ -1662,6 +1813,7 @@ struct VerilogBackend : public Backend {
noattr = false;
attr2comment = false;
noexpr = false;
+ noinline = false;
nodec = false;
nohex = false;
nostr = false;
@@ -1723,7 +1875,11 @@ struct VerilogBackend : public Backend {
continue;
}
if (arg == "-noexpr") {
- noexpr = true;
+ noexpr = noinline = true;
+ continue;
+ }
+ if (arg == "-noinline") {
+ noinline = true;
continue;
}
if (arg == "-nodec") {
diff --git a/kernel/modtools.h b/kernel/modtools.h
index 409562eb..b198709d 100644
--- a/kernel/modtools.h
+++ b/kernel/modtools.h
@@ -226,6 +226,10 @@ struct ModIndex : public RTLIL::Monitor
auto_reload_module = true;
}
+ ModIndex() : module(NULL)
+ {
+ }
+
ModIndex(RTLIL::Module *_m) : sigmap(_m), module(_m)
{
auto_reload_counter = 0;
@@ -235,7 +239,8 @@ struct ModIndex : public RTLIL::Monitor
~ModIndex()
{
- module->monitors.erase(this);
+ if (module)
+ module->monitors.erase(this);
}
SigBitInfo *query(RTLIL::SigBit bit)