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/*
* nextpnr -- Next Generation Place and Route
*
* Copyright (C) 2020 David Shah <dave@ds0.me>
*
*
* 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.
*
*/
#include "log.h"
#include "nextpnr.h"
#include <iterator>
NEXTPNR_NAMESPACE_BEGIN
struct TCLEntity
{
enum EntityType
{
ENTITY_CELL,
ENTITY_PORT,
ENTITY_NET,
} type;
IdString name;
TCLEntity(EntityType type, IdString name) : type(type), name(name) {}
const std::string &to_string(Context *ctx) { return name.str(ctx); }
CellInfo *get_cell(Context *ctx)
{
if (type != ENTITY_CELL)
return nullptr;
return ctx->cells.at(name).get();
}
PortInfo *get_port(Context *ctx)
{
if (type != ENTITY_PORT)
return nullptr;
return &ctx->ports.at(name);
}
NetInfo *get_net(Context *ctx)
{
if (type != ENTITY_NET)
return nullptr;
return ctx->nets.at(name).get();
}
};
struct TCLValue
{
TCLValue(const std::string &s) : is_string(true), str(s){};
TCLValue(const std::vector<TCLEntity> &l) : is_string(false), list(l){};
bool is_string;
std::string str; // simple string value
std::vector<TCLEntity> list; // list of entities
};
struct PDCParser
{
std::string buf;
int pos = 0;
int lineno = 1;
Context *ctx;
PDCParser(const std::string &buf, Context *ctx) : buf(buf), ctx(ctx){};
inline bool eof() const { return pos == int(buf.size()); }
inline char peek() const { return buf.at(pos); }
inline char get()
{
char c = buf.at(pos++);
if (c == '\n')
++lineno;
return c;
}
std::string get(int n)
{
std::string s = buf.substr(pos, n);
pos += n;
return s;
}
// If next char matches c, take it from the stream and return true
bool check_get(char c)
{
if (peek() == c) {
get();
return true;
} else {
return false;
}
}
// If next char matches any in chars, take it from the stream and return true
bool check_get_any(const std::string &chrs)
{
char c = peek();
if (chrs.find(c) != std::string::npos) {
get();
return true;
} else {
return false;
}
}
inline void skip_blank(bool nl = false)
{
while (!eof() && check_get_any(nl ? " \t\n\r" : " \t"))
;
}
// Return true if end of line (or file)
inline bool skip_check_eol()
{
skip_blank(false);
if (eof())
return true;
char c = peek();
// Comments count as end of line
if (c == '#') {
get();
while (!eof() && peek() != '\n' && peek() != '\r')
get();
return true;
}
if (c == ';') {
// Forced end of line
get();
return true;
}
return (c == '\n' || c == '\r');
}
inline std::string get_str()
{
std::string s;
skip_blank(false);
if (eof())
return "";
bool in_quotes = false, in_braces = false, escaped = false;
char c = get();
if (c == '"')
in_quotes = true;
else if (c == '{')
in_braces = true;
else
s += c;
while (true) {
char c = peek();
if (!in_quotes && !in_braces && !escaped && (std::isblank(c) || c == ']')) {
break;
}
get();
if (escaped) {
s += c;
escaped = false;
} else if ((in_quotes && c == '"') || (in_braces && c == '}')) {
break;
} else if (c == '\\') {
escaped = true;
} else {
s += c;
}
}
return s;
}
TCLValue evaluate(const std::vector<TCLValue> &arguments)
{
NPNR_ASSERT(!arguments.empty());
auto &arg0 = arguments.at(0);
NPNR_ASSERT(arg0.is_string);
const std::string &cmd = arg0.str;
if (cmd == "get_ports")
return cmd_get_ports(arguments);
else if (cmd == "get_cells")
return cmd_get_cells(arguments);
else if (cmd == "ldc_set_location")
return cmd_ldc_set_location(arguments);
else if (cmd == "ldc_set_port")
return cmd_ldc_set_port(arguments);
else
log_error("Unsupported PDC command '%s'\n", cmd.c_str());
}
std::vector<TCLValue> get_arguments()
{
std::vector<TCLValue> args;
while (!skip_check_eol()) {
if (check_get('[')) {
// Start of a sub-expression
auto result = evaluate(get_arguments());
NPNR_ASSERT(check_get(']'));
args.push_back(result);
} else if (peek() == ']') {
break;
} else {
args.push_back(get_str());
}
}
skip_blank(true);
return args;
}
TCLValue cmd_get_ports(const std::vector<TCLValue> &arguments)
{
std::vector<TCLEntity> ports;
for (int i = 1; i < int(arguments.size()); i++) {
auto &arg = arguments.at(i);
if (!arg.is_string)
log_error("get_ports expected string arguments (line %d)\n", lineno);
std::string s = arg.str;
if (s.at(0) == '-')
log_error("unsupported argument '%s' to get_ports (line %d)\n", s.c_str(), lineno);
IdString id = ctx->id(s);
if (ctx->ports.count(id))
ports.emplace_back(TCLEntity::ENTITY_PORT, id);
}
return ports;
}
TCLValue cmd_get_cells(const std::vector<TCLValue> &arguments)
{
std::vector<TCLEntity> cells;
for (int i = 1; i < int(arguments.size()); i++) {
auto &arg = arguments.at(i);
if (!arg.is_string)
log_error("get_cells expected string arguments (line %d)\n", lineno);
std::string s = arg.str;
if (s.at(0) == '-')
log_error("unsupported argument '%s' to get_cells (line %d)\n", s.c_str(), lineno);
IdString id = ctx->id(s);
if (ctx->cells.count(id))
cells.emplace_back(TCLEntity::ENTITY_CELL, id);
}
return cells;
}
TCLValue cmd_ldc_set_location(const std::vector<TCLValue> &arguments)
{
std::string site;
for (int i = 1; i < int(arguments.size()); i++) {
auto &arg = arguments.at(i);
if (arg.is_string) {
std::string s = arg.str;
if (s == "-site") {
i++;
auto &val = arguments.at(i);
if (!val.is_string)
log_error("expecting string argument to -site (line %d)\n", lineno);
site = val.str;
}
} else {
if (site.empty())
log_error("expecting -site before list of objects (line %d)\n", lineno);
for (const auto &ety : arg.list) {
if (ety.type == TCLEntity::ENTITY_PORT)
ctx->io_attr[ety.name][id_LOC] = site;
else if (ety.type == TCLEntity::ENTITY_CELL)
ctx->cells[ety.name]->attrs[id_LOC] = site;
else
log_error("ldc_set_location applies only to cells or IO ports (line %d)\n", lineno);
}
}
}
return std::string{};
}
TCLValue cmd_ldc_set_port(const std::vector<TCLValue> &arguments)
{
std::unordered_map<IdString, Property> args;
for (int i = 1; i < int(arguments.size()); i++) {
auto &arg = arguments.at(i);
if (arg.is_string) {
std::string s = arg.str;
if (s == "-iobuf") {
i++;
auto &val = arguments.at(i);
if (!val.is_string)
log_error("expecting string argument to -iobuf (line %d)\n", lineno);
std::stringstream ss(val.str);
std::string kv;
while (ss >> kv) {
auto eqp = kv.find('=');
if (eqp == std::string::npos)
log_error("expected key-value pair separated by '=' (line %d)", lineno);
std::string k = kv.substr(0, eqp), v = kv.substr(eqp + 1);
args[ctx->id(k)] = v;
}
} else {
log_error("unexpected argument '%s' to ldc_set_port (line %d)\n", s.c_str(), lineno);
}
} else {
for (const auto &ety : arg.list) {
if (ety.type == TCLEntity::ENTITY_PORT)
for (const auto &kv : args)
ctx->io_attr[ety.name][kv.first] = kv.second;
else
log_error("ldc_set_port applies only to IO ports (line %d)\n", lineno);
}
}
}
return std::string{};
}
void operator()()
{
while (!eof()) {
skip_blank(true);
auto args = get_arguments();
if (args.empty())
continue;
evaluate(args);
}
}
};
void Arch::read_pdc(std::istream &in)
{
std::string buf(std::istreambuf_iterator<char>(in), {});
PDCParser(buf, getCtx())();
}
NEXTPNR_NAMESPACE_END
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