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yosys/backends/edif/edif.cc
Clifford Wolf f4abc21d8a Add "whitebox" attribute, add "read_verilog -wb" 
Signed-off-by: Clifford Wolf <clifford@clifford.at>
2019-04-18 17:45:47 +02:00

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/*
* yosys -- Yosys Open SYnthesis Suite
*
* Copyright (C) 2012 Clifford Wolf <clifford@clifford.at>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
// [[CITE]] EDIF Version 2 0 0 Grammar
// http://web.archive.org/web/20050730021644/http://www.edif.org/documentation/BNF_GRAMMAR/index.html
#include "kernel/rtlil.h"
#include "kernel/register.h"
#include "kernel/sigtools.h"
#include "kernel/celltypes.h"
#include "kernel/log.h"
#include <string>
USING_YOSYS_NAMESPACE
PRIVATE_NAMESPACE_BEGIN
#define EDIF_DEF(_id) edif_names(RTLIL::unescape_id(_id), true).c_str()
#define EDIF_DEFR(_id, _ren, _bl, _br) edif_names(RTLIL::unescape_id(_id), true, _ren, _bl, _br).c_str()
#define EDIF_REF(_id) edif_names(RTLIL::unescape_id(_id), false).c_str()
struct EdifNames
{
int counter;
char delim_left, delim_right;
std::set<std::string> generated_names, used_names;
std::map<std::string, std::string> name_map;
EdifNames() : counter(1), delim_left('['), delim_right(']') { }
std::string operator()(std::string id, bool define, bool port_rename = false, int range_left = 0, int range_right = 0)
{
if (define) {
std::string new_id = operator()(id, false);
if (port_rename)
return stringf("(rename %s \"%s%c%d:%d%c\")", new_id.c_str(), id.c_str(), delim_left, range_left, range_right, delim_right);
return new_id != id ? stringf("(rename %s \"%s\")", new_id.c_str(), id.c_str()) : id;
}
if (name_map.count(id) > 0)
return name_map.at(id);
if (generated_names.count(id) > 0)
goto do_rename;
if (id == "GND" || id == "VCC")
goto do_rename;
for (size_t i = 0; i < id.size(); i++) {
if ('A' <= id[i] && id[i] <= 'Z')
continue;
if ('a' <= id[i] && id[i] <= 'z')
continue;
if ('0' <= id[i] && id[i] <= '9' && i > 0)
continue;
if (id[i] == '_' && i > 0 && i != id.size()-1)
continue;
goto do_rename;
}
used_names.insert(id);
return id;
do_rename:;
std::string gen_name;
while (1) {
gen_name = stringf("id%05d", counter++);
if (generated_names.count(gen_name) == 0 &&
used_names.count(gen_name) == 0)
break;
}
generated_names.insert(gen_name);
name_map[id] = gen_name;
return gen_name;
}
};
struct EdifBackend : public Backend {
EdifBackend() : Backend("edif", "write design to EDIF netlist file") { }
void help() YS_OVERRIDE
{
// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
log("\n");
log(" write_edif [options] [filename]\n");
log("\n");
log("Write the current design to an EDIF netlist file.\n");
log("\n");
log(" -top top_module\n");
log(" set the specified module as design top module\n");
log("\n");
log(" -nogndvcc\n");
log(" do not create \"GND\" and \"VCC\" cells. (this will produce an error\n");
log(" if the design contains constant nets. use \"hilomap\" to map to custom\n");
log(" constant drivers first)\n");
log("\n");
log(" -gndvccy\n");
log(" create \"GND\" and \"VCC\" cells with \"Y\" outputs. (the default is \"G\"\n");
log(" for \"GND\" and \"P\" for \"VCC\".)\n");
log("\n");
log(" -attrprop\n");
log(" create EDIF properties for cell attributes\n");
log("\n");
log(" -pvector {par|bra|ang}\n");
log(" sets the delimiting character for module port rename clauses to\n");
log(" parentheses, square brackets, or angle brackets.\n");
log("\n");
log("Unfortunately there are different \"flavors\" of the EDIF file format. This\n");
log("command generates EDIF files for the Xilinx place&route tools. It might be\n");
log("necessary to make small modifications to this command when a different tool\n");
log("is targeted.\n");
log("\n");
}
void execute(std::ostream *&f, std::string filename, std::vector<std::string> args, RTLIL::Design *design) YS_OVERRIDE
{
log_header(design, "Executing EDIF backend.\n");
std::string top_module_name;
bool port_rename = false;
bool attr_properties = false;
std::map<RTLIL::IdString, std::map<RTLIL::IdString, int>> lib_cell_ports;
bool nogndvcc = false, gndvccy = false;
CellTypes ct(design);
EdifNames edif_names;
size_t argidx;
for (argidx = 1; argidx < args.size(); argidx++)
{
if (args[argidx] == "-top" && argidx+1 < args.size()) {
top_module_name = args[++argidx];
continue;
}
if (args[argidx] == "-nogndvcc") {
nogndvcc = true;
continue;
}
if (args[argidx] == "-gndvccy") {
gndvccy = true;
continue;
}
if (args[argidx] == "-attrprop") {
attr_properties = true;
continue;
}
if (args[argidx] == "-pvector" && argidx+1 < args.size()) {
std::string parray;
port_rename = true;
parray = args[++argidx];
if (parray == "par") {
edif_names.delim_left = '(';edif_names.delim_right = ')';
} else if (parray == "ang") {
edif_names.delim_left = '<';edif_names.delim_right = '>';
} else {
edif_names.delim_left = '[';edif_names.delim_right = ']';
}
continue;
}
break;
}
extra_args(f, filename, args, argidx);
if (top_module_name.empty())
for (auto & mod_it:design->modules_)
if (mod_it.second->get_bool_attribute("\\top"))
top_module_name = mod_it.first.str();
for (auto module_it : design->modules_)
{
RTLIL::Module *module = module_it.second;
if (module->get_blackbox_attribute())
continue;
if (top_module_name.empty())
top_module_name = module->name.str();
if (module->processes.size() != 0)
log_error("Found unmapped processes in module %s: unmapped processes are not supported in EDIF backend!\n", RTLIL::id2cstr(module->name));
if (module->memories.size() != 0)
log_error("Found unmapped memories in module %s: unmapped memories are not supported in EDIF backend!\n", RTLIL::id2cstr(module->name));
for (auto cell_it : module->cells_)
{
RTLIL::Cell *cell = cell_it.second;
if (!design->modules_.count(cell->type) || design->modules_.at(cell->type)->get_blackbox_attribute()) {
lib_cell_ports[cell->type];
for (auto p : cell->connections())
lib_cell_ports[cell->type][p.first] = GetSize(p.second);
}
}
}
if (top_module_name.empty())
log_error("No module found in design!\n");
*f << stringf("(edif %s\n", EDIF_DEF(top_module_name));
*f << stringf(" (edifVersion 2 0 0)\n");
*f << stringf(" (edifLevel 0)\n");
*f << stringf(" (keywordMap (keywordLevel 0))\n");
*f << stringf(" (comment \"Generated by %s\")\n", yosys_version_str);
*f << stringf(" (external LIB\n");
*f << stringf(" (edifLevel 0)\n");
*f << stringf(" (technology (numberDefinition))\n");
if (!nogndvcc)
{
*f << stringf(" (cell GND\n");
*f << stringf(" (cellType GENERIC)\n");
*f << stringf(" (view VIEW_NETLIST\n");
*f << stringf(" (viewType NETLIST)\n");
*f << stringf(" (interface (port %c (direction OUTPUT)))\n", gndvccy ? 'Y' : 'G');
*f << stringf(" )\n");
*f << stringf(" )\n");
*f << stringf(" (cell VCC\n");
*f << stringf(" (cellType GENERIC)\n");
*f << stringf(" (view VIEW_NETLIST\n");
*f << stringf(" (viewType NETLIST)\n");
*f << stringf(" (interface (port %c (direction OUTPUT)))\n", gndvccy ? 'Y' : 'P');
*f << stringf(" )\n");
*f << stringf(" )\n");
}
for (auto &cell_it : lib_cell_ports) {
*f << stringf(" (cell %s\n", EDIF_DEF(cell_it.first));
*f << stringf(" (cellType GENERIC)\n");
*f << stringf(" (view VIEW_NETLIST\n");
*f << stringf(" (viewType NETLIST)\n");
*f << stringf(" (interface\n");
for (auto &port_it : cell_it.second) {
const char *dir = "INOUT";
if (ct.cell_known(cell_it.first)) {
if (!ct.cell_output(cell_it.first, port_it.first))
dir = "INPUT";
else if (!ct.cell_input(cell_it.first, port_it.first))
dir = "OUTPUT";
}
if (port_it.second == 1)
*f << stringf(" (port %s (direction %s))\n", EDIF_DEF(port_it.first), dir);
else {
int b[2] = {port_it.second-1, 0};
auto m = design->module(cell_it.first);
if (m) {
auto w = m->wire(port_it.first);
if (w) {
b[w->upto ? 0 : 1] = w->start_offset;
b[w->upto ? 1 : 0] = w->start_offset+GetSize(w)-1;
}
}
*f << stringf(" (port (array %s %d) (direction %s))\n", EDIF_DEFR(port_it.first, port_rename, b[0], b[1]), port_it.second, dir);
}
}
*f << stringf(" )\n");
*f << stringf(" )\n");
*f << stringf(" )\n");
}
*f << stringf(" )\n");
std::vector<RTLIL::Module*> sorted_modules;
// extract module dependencies
std::map<RTLIL::Module*, std::set<RTLIL::Module*>> module_deps;
for (auto &mod_it : design->modules_) {
module_deps[mod_it.second] = std::set<RTLIL::Module*>();
for (auto &cell_it : mod_it.second->cells_)
if (design->modules_.count(cell_it.second->type) > 0)
module_deps[mod_it.second].insert(design->modules_.at(cell_it.second->type));
}
// simple good-enough topological sort
// (O(n*m) on n elements and depth m)
while (module_deps.size() > 0) {
size_t sorted_modules_idx = sorted_modules.size();
for (auto &it : module_deps) {
for (auto &dep : it.second)
if (module_deps.count(dep) > 0)
goto not_ready_yet;
// log("Next in topological sort: %s\n", RTLIL::id2cstr(it.first->name));
sorted_modules.push_back(it.first);
not_ready_yet:;
}
if (sorted_modules_idx == sorted_modules.size())
log_error("Cyclic dependency between modules found! Cycle includes module %s.\n", RTLIL::id2cstr(module_deps.begin()->first->name));
while (sorted_modules_idx < sorted_modules.size())
module_deps.erase(sorted_modules.at(sorted_modules_idx++));
}
*f << stringf(" (library DESIGN\n");
*f << stringf(" (edifLevel 0)\n");
*f << stringf(" (technology (numberDefinition))\n");
for (auto module : sorted_modules)
{
if (module->get_blackbox_attribute())
continue;
SigMap sigmap(module);
std::map<RTLIL::SigSpec, std::set<std::string>> net_join_db;
*f << stringf(" (cell %s\n", EDIF_DEF(module->name));
*f << stringf(" (cellType GENERIC)\n");
*f << stringf(" (view VIEW_NETLIST\n");
*f << stringf(" (viewType NETLIST)\n");
*f << stringf(" (interface\n");
for (auto &wire_it : module->wires_) {
RTLIL::Wire *wire = wire_it.second;
if (wire->port_id == 0)
continue;
const char *dir = "INOUT";
if (!wire->port_output)
dir = "INPUT";
else if (!wire->port_input)
dir = "OUTPUT";
if (wire->width == 1) {
*f << stringf(" (port %s (direction %s))\n", EDIF_DEF(wire->name), dir);
RTLIL::SigSpec sig = sigmap(RTLIL::SigSpec(wire));
net_join_db[sig].insert(stringf("(portRef %s)", EDIF_REF(wire->name)));
} else {
int b[2];
b[wire->upto ? 0 : 1] = wire->start_offset;
b[wire->upto ? 1 : 0] = wire->start_offset + GetSize(wire) - 1;
*f << stringf(" (port (array %s %d) (direction %s))\n", EDIF_DEFR(wire->name, port_rename, b[0], b[1]), wire->width, dir);
for (int i = 0; i < wire->width; i++) {
RTLIL::SigSpec sig = sigmap(RTLIL::SigSpec(wire, i));
net_join_db[sig].insert(stringf("(portRef (member %s %d))", EDIF_REF(wire->name), GetSize(wire)-i-1));
}
}
}
*f << stringf(" )\n");
*f << stringf(" (contents\n");
if (!nogndvcc) {
*f << stringf(" (instance GND (viewRef VIEW_NETLIST (cellRef GND (libraryRef LIB))))\n");
*f << stringf(" (instance VCC (viewRef VIEW_NETLIST (cellRef VCC (libraryRef LIB))))\n");
}
for (auto &cell_it : module->cells_) {
RTLIL::Cell *cell = cell_it.second;
*f << stringf(" (instance %s\n", EDIF_DEF(cell->name));
*f << stringf(" (viewRef VIEW_NETLIST (cellRef %s%s))", EDIF_REF(cell->type),
lib_cell_ports.count(cell->type) > 0 ? " (libraryRef LIB)" : "");
auto add_prop = [&](IdString name, Const val) {
if ((val.flags & RTLIL::CONST_FLAG_STRING) != 0)
*f << stringf("\n (property %s (string \"%s\"))", EDIF_DEF(name), val.decode_string().c_str());
else if (val.bits.size() <= 32 && RTLIL::SigSpec(val).is_fully_def())
*f << stringf("\n (property %s (integer %u))", EDIF_DEF(name), val.as_int());
else {
std::string hex_string = "";
for (size_t i = 0; i < val.bits.size(); i += 4) {
int digit_value = 0;
if (i+0 < val.bits.size() && val.bits.at(i+0) == RTLIL::State::S1) digit_value |= 1;
if (i+1 < val.bits.size() && val.bits.at(i+1) == RTLIL::State::S1) digit_value |= 2;
if (i+2 < val.bits.size() && val.bits.at(i+2) == RTLIL::State::S1) digit_value |= 4;
if (i+3 < val.bits.size() && val.bits.at(i+3) == RTLIL::State::S1) digit_value |= 8;
char digit_str[2] = { "0123456789abcdef"[digit_value], 0 };
hex_string = std::string(digit_str) + hex_string;
}
*f << stringf("\n (property %s (string \"%d'h%s\"))", EDIF_DEF(name), GetSize(val.bits), hex_string.c_str());
}
};
for (auto &p : cell->parameters)
add_prop(p.first, p.second);
if (attr_properties)
for (auto &p : cell->attributes)
add_prop(p.first, p.second);
*f << stringf(")\n");
for (auto &p : cell->connections()) {
RTLIL::SigSpec sig = sigmap(p.second);
for (int i = 0; i < GetSize(sig); i++)
if (sig[i].wire == NULL && sig[i] != RTLIL::State::S0 && sig[i] != RTLIL::State::S1)
log_warning("Bit %d of cell port %s.%s.%s driven by %s will be left unconnected in EDIF output.\n",
i, log_id(module), log_id(cell), log_id(p.first), log_signal(sig[i]));
else if (sig.size() == 1)
net_join_db[sig[i]].insert(stringf("(portRef %s (instanceRef %s))", EDIF_REF(p.first), EDIF_REF(cell->name)));
else {
int member_idx = GetSize(sig)-i-1;
auto m = design->module(cell->type);
if (m) {
auto w = m->wire(p.first);
if (w)
member_idx = GetSize(w)-i-1;
}
net_join_db[sig[i]].insert(stringf("(portRef (member %s %d) (instanceRef %s))",
EDIF_REF(p.first), member_idx, EDIF_REF(cell->name)));
}
}
}
for (auto &it : net_join_db) {
RTLIL::SigBit sig = it.first;
if (sig.wire == NULL && sig != RTLIL::State::S0 && sig != RTLIL::State::S1) {
if (sig == RTLIL::State::Sx) {
for (auto &ref : it.second)
log_warning("Exporting x-bit on %s as zero bit.\n", ref.c_str());
sig = RTLIL::State::S0;
} else {
for (auto &ref : it.second)
log_error("Don't know how to handle %s on %s.\n", log_signal(sig), ref.c_str());
log_abort();
}
}
std::string netname;
if (sig == RTLIL::State::S0)
netname = "GND_NET";
else if (sig == RTLIL::State::S1)
netname = "VCC_NET";
else {
netname = log_signal(sig);
for (size_t i = 0; i < netname.size(); i++)
if (netname[i] == ' ' || netname[i] == '\\')
netname.erase(netname.begin() + i--);
}
*f << stringf(" (net %s (joined\n", EDIF_DEF(netname));
for (auto &ref : it.second)
*f << stringf(" %s\n", ref.c_str());
if (sig.wire == NULL) {
if (nogndvcc)
log_error("Design contains constant nodes (map with \"hilomap\" first).\n");
if (sig == RTLIL::State::S0)
*f << stringf(" (portRef %c (instanceRef GND))\n", gndvccy ? 'Y' : 'G');
if (sig == RTLIL::State::S1)
*f << stringf(" (portRef %c (instanceRef VCC))\n", gndvccy ? 'Y' : 'P');
}
*f << stringf(" ))\n");
}
*f << stringf(" )\n");
*f << stringf(" )\n");
*f << stringf(" )\n");
}
*f << stringf(" )\n");
*f << stringf(" (design %s\n", EDIF_DEF(top_module_name));
*f << stringf(" (cellRef %s (libraryRef DESIGN))\n", EDIF_REF(top_module_name));
*f << stringf(" )\n");
*f << stringf(")\n");
}
} EdifBackend;
PRIVATE_NAMESPACE_END
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