mirror of https://github.com/YosysHQ/yosys.git
Add JSON front-end
This commit is contained in:
Clifford Wolf
parent
3c693b6561
commit
4b2d1fe688
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@ -0,0 +1,3 @@
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OBJS += frontends/json/jsonparse.o
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@ -0,0 +1,469 @@
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/*
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* yosys -- Yosys Open SYnthesis Suite
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*
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* Copyright (C) 2012 Clifford Wolf <clifford@clifford.at>
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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*/
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#include "kernel/yosys.h"
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YOSYS_NAMESPACE_BEGIN
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struct JsonNode
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{
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char type; // S=String, N=Number, A=Array, D=Dict
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string data_string;
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int data_number;
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vector<JsonNode*> data_array;
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dict<string, JsonNode*> data_dict;
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JsonNode(std::istream &f)
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{
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type = 0;
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data_number = 0;
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while (1)
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{
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int ch = f.get();
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if (ch == EOF)
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log_error("Unexpected EOF in JSON file.\n");
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if (ch == ' ' || ch == '\t' || ch == '\r' || ch == '\n')
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continue;
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if (ch == '"')
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{
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type = 'S';
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while (1)
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{
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ch = f.get();
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if (ch == EOF)
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log_error("Unexpected EOF in JSON string.\n");
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if (ch == '"')
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break;
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if (ch == '\\') {
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int ch = f.get();
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if (ch == EOF)
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log_error("Unexpected EOF in JSON string.\n");
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}
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data_string += ch;
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}
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break;
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}
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if ('0' <= ch && ch <= '9')
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{
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type = 'N';
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data_number = ch - '0';
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while (1)
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{
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ch = f.get();
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if (ch == EOF)
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break;
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if (ch < '0' || '9' < ch) {
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f.unget();
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break;
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}
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data_number = data_number*10 + (ch - '0');
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}
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break;
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}
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if (ch == '[')
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{
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type = 'A';
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while (1)
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{
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ch = f.get();
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if (ch == EOF)
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log_error("Unexpected EOF in JSON file.\n");
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if (ch == ' ' || ch == '\t' || ch == '\r' || ch == '\n' || ch == ',')
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continue;
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if (ch == ']')
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break;
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f.unget();
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data_array.push_back(new JsonNode(f));
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}
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break;
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}
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if (ch == '{')
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{
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type = 'D';
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while (1)
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{
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ch = f.get();
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if (ch == EOF)
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log_error("Unexpected EOF in JSON file.\n");
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if (ch == ' ' || ch == '\t' || ch == '\r' || ch == '\n' || ch == ',')
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continue;
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if (ch == '}')
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break;
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f.unget();
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JsonNode key(f);
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while (1)
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{
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ch = f.get();
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if (ch == EOF)
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log_error("Unexpected EOF in JSON file.\n");
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if (ch == ' ' || ch == '\t' || ch == '\r' || ch == '\n' || ch == ':')
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continue;
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f.unget();
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break;
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}
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JsonNode *value = new JsonNode(f);
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if (key.type != 'S')
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log_error("Unexpected non-string key in JSON dict.\n");
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data_dict[key.data_string] = value;
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}
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break;
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}
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log_error("Unexpected character in JSON file: '%c'\n", ch);
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}
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}
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~JsonNode()
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{
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for (auto it : data_array)
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delete it;
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for (auto &it : data_dict)
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delete it.second;
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}
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};
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void json_import(Design *design, string &modname, JsonNode *node)
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{
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log("Importing module %s from JSON tree.\n", modname.c_str());
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Module *module = new RTLIL::Module;
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module->name = RTLIL::escape_id(modname.c_str());
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if (design->module(module->name))
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log_error("Re-definition of module %s.\n", log_id(module->name));
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design->add(module);
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// FIXME: Handle module attributes
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dict<int, SigBit> signal_bits;
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if (node->data_dict.count("ports"))
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{
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JsonNode *ports_node = node->data_dict.at("ports");
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if (ports_node->type != 'D')
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log_error("JSON ports node is not a dictionary.\n");
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for (auto &port : ports_node->data_dict)
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{
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IdString port_name = RTLIL::escape_id(port.first.c_str());
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JsonNode *port_node = port.second;
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if (port_node->type != 'D')
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log_error("JSON port node '%s' is not a dictionary.\n", log_id(port_name));
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if (port_node->data_dict.count("direction") == 0)
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log_error("JSON port node '%s' has no direction attribute.\n", log_id(port_name));
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if (port_node->data_dict.count("bits") == 0)
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log_error("JSON port node '%s' has no bits attribute.\n", log_id(port_name));
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JsonNode *port_direction_node = port_node->data_dict.at("direction");
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JsonNode *port_bits_node = port_node->data_dict.at("bits");
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if (port_direction_node->type != 'S')
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log_error("JSON port node '%s' has non-string direction attribute.\n", log_id(port_name));
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if (port_bits_node->type != 'A')
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log_error("JSON port node '%s' has non-array bits attribute.\n", log_id(port_name));
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Wire *port_wire = module->wire(port_name);
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if (port_wire == nullptr)
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port_wire = module->addWire(port_name, GetSize(port_bits_node->data_array));
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if (port_direction_node->data_string == "input") {
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port_wire->port_input = true;
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} else
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if (port_direction_node->data_string == "output") {
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port_wire->port_output = true;
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} else
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if (port_direction_node->data_string == "inout") {
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port_wire->port_output = true;
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} else
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log_error("JSON port node '%s' has invalid '%s' direction attribute.\n", log_id(port_name), port_direction_node->data_string.c_str());
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for (int i = 0; i < GetSize(port_bits_node->data_array); i++)
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{
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JsonNode *bitval_node = port_bits_node->data_array.at(i);
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SigBit sigbit(port_wire, i);
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if (bitval_node->type == 'S') {
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if (bitval_node->data_string == "0")
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module->connect(sigbit, State::S0);
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else if (bitval_node->data_string == "1")
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module->connect(sigbit, State::S1);
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else if (bitval_node->data_string == "x")
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module->connect(sigbit, State::Sx);
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else if (bitval_node->data_string == "z")
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module->connect(sigbit, State::Sz);
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else
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log_error("JSON port node '%s' has invalid '%s' bit string value on bit %d.\n",
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log_id(port_name), bitval_node->data_string.c_str(), i);
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} else
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if (bitval_node->type == 'N') {
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int bitidx = bitval_node->data_number;
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if (signal_bits.count(bitidx)) {
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if (port_wire->port_output) {
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module->connect(sigbit, signal_bits.at(bitidx));
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} else {
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module->connect(signal_bits.at(bitidx), sigbit);
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signal_bits[bitidx] = sigbit;
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}
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} else {
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signal_bits[bitidx] = sigbit;
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}
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} else
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log_error("JSON port node '%s' has invalid bit value on bit %d.\n", log_id(port_name), i);
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}
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}
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module->fixup_ports();
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}
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if (node->data_dict.count("netnames"))
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{
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JsonNode *netnames_node = node->data_dict.at("netnames");
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if (netnames_node->type != 'D')
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log_error("JSON netnames node is not a dictionary.\n");
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for (auto &net : netnames_node->data_dict)
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{
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IdString net_name = RTLIL::escape_id(net.first.c_str());
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JsonNode *net_node = net.second;
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if (net_node->type != 'D')
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log_error("JSON netname node '%s' is not a dictionary.\n", log_id(net_name));
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if (net_node->data_dict.count("bits") == 0)
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log_error("JSON netname node '%s' has no bits attribute.\n", log_id(net_name));
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JsonNode *bits_node = net_node->data_dict.at("bits");
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if (bits_node->type != 'A')
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log_error("JSON netname node '%s' has non-array bits attribute.\n", log_id(net_name));
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Wire *wire = module->wire(net_name);
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if (wire == nullptr)
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wire = module->addWire(net_name, GetSize(bits_node->data_array));
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for (int i = 0; i < GetSize(bits_node->data_array); i++)
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{
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JsonNode *bitval_node = bits_node->data_array.at(i);
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SigBit sigbit(wire, i);
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if (bitval_node->type == 'S') {
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if (bitval_node->data_string == "0")
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module->connect(sigbit, State::S0);
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else if (bitval_node->data_string == "1")
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module->connect(sigbit, State::S1);
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else if (bitval_node->data_string == "x")
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module->connect(sigbit, State::Sx);
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else if (bitval_node->data_string == "z")
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module->connect(sigbit, State::Sz);
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else
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log_error("JSON netname node '%s' has invalid '%s' bit string value on bit %d.\n",
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log_id(net_name), bitval_node->data_string.c_str(), i);
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} else
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if (bitval_node->type == 'N') {
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int bitidx = bitval_node->data_number;
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if (signal_bits.count(bitidx)) {
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if (sigbit != signal_bits.at(bitidx))
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module->connect(sigbit, signal_bits.at(bitidx));
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} else {
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signal_bits[bitidx] = sigbit;
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}
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} else
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log_error("JSON netname node '%s' has invalid bit value on bit %d.\n", log_id(net_name), i);
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}
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// FIXME: Handle wire attributes
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}
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}
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if (node->data_dict.count("cells"))
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{
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JsonNode *cells_node = node->data_dict.at("cells");
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if (cells_node->type != 'D')
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log_error("JSON cells node is not a dictionary.\n");
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for (auto &cell_node_it : cells_node->data_dict)
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{
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IdString cell_name = RTLIL::escape_id(cell_node_it.first.c_str());
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JsonNode *cell_node = cell_node_it.second;
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if (cell_node->type != 'D')
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log_error("JSON cells node '%s' is not a dictionary.\n", log_id(cell_name));
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if (cell_node->data_dict.count("type") == 0)
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log_error("JSON cells node '%s' has no type attribute.\n", log_id(cell_name));
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JsonNode *type_node = cell_node->data_dict.at("type");
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if (type_node->type != 'S')
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log_error("JSON cells node '%s' has a non-string type.\n", log_id(cell_name));
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IdString cell_type = RTLIL::escape_id(type_node->data_string.c_str());
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Cell *cell = module->addCell(cell_name, cell_type);
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if (cell_node->data_dict.count("connections") == 0)
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log_error("JSON cells node '%s' has no connections attribute.\n", log_id(cell_name));
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JsonNode *connections_node = cell_node->data_dict.at("connections");
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if (connections_node->type != 'D')
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log_error("JSON cells node '%s' has non-dictionary connections attribute.\n", log_id(cell_name));
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for (auto &conn_it : connections_node->data_dict)
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{
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IdString conn_name = RTLIL::escape_id(conn_it.first.c_str());
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JsonNode *conn_node = conn_it.second;
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if (conn_node->type != 'A')
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log_error("JSON cells node '%s' connection '%s' is not an array.\n", log_id(cell_name), log_id(conn_name));
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SigSpec sig;
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for (int i = 0; i < GetSize(conn_node->data_array); i++)
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{
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JsonNode *bitval_node = conn_node->data_array.at(i);
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if (bitval_node->type == 'S') {
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if (bitval_node->data_string == "0")
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sig.append(State::S0);
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else if (bitval_node->data_string == "1")
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sig.append(State::S1);
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else if (bitval_node->data_string == "x")
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sig.append(State::Sx);
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else if (bitval_node->data_string == "z")
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sig.append(State::Sz);
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else
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log_error("JSON cells node '%s' connection '%s' has invalid '%s' bit string value on bit %d.\n",
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log_id(cell_name), log_id(conn_name), bitval_node->data_string.c_str(), i);
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} else
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if (bitval_node->type == 'N') {
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int bitidx = bitval_node->data_number;
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if (signal_bits.count(bitidx) == 0)
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signal_bits[bitidx] = module->addWire(NEW_ID);
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sig.append(signal_bits.at(bitidx));
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} else
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log_error("JSON cells node '%s' connection '%s' has invalid bit value on bit %d.\n",
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log_id(cell_name), log_id(conn_name), i);
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}
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cell->setPort(conn_name, sig);
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}
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// FIXME: Handle cell attributes
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// FIXME: Handle cell parameters
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}
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}
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}
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struct JsonFrontend : public Frontend {
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JsonFrontend() : Frontend("json", "read JSON file") { }
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virtual void help()
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{
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// |---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|---v---|
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log("\n");
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log(" read_json [filename]\n");
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log("\n");
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log("Load modules from a JSON file into the current design See \"help write_json\"\n");
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log("for a description of the file format.\n");
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log("\n");
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}
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virtual void execute(std::istream *&f, std::string filename, std::vector<std::string> args, RTLIL::Design *design)
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{
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log_header(design, "Executing JSON frontend.\n");
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size_t argidx;
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for (argidx = 1; argidx < args.size(); argidx++) {
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// std::string arg = args[argidx];
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// if (arg == "-sop") {
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// sop_mode = true;
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// continue;
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// }
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break;
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}
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extra_args(f, filename, args, argidx);
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JsonNode root(*f);
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if (root.type != 'D')
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log_error("JSON root node is not a dictionary.\n");
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if (root.data_dict.count("modules") != 0)
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{
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JsonNode *modules = root.data_dict.at("modules");
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if (modules->type != 'D')
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log_error("JSON modules node is not a dictionary.\n");
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for (auto &it : modules->data_dict)
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json_import(design, it.first, it.second);
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}
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}
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} JsonFrontend;
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YOSYS_NAMESPACE_END
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