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frontend: JSON implementation of the generic framework
Signed-off-by: David Shah <[email protected]>
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,189 @@ | ||
| /* | ||
| * nextpnr -- Next Generation Place and Route | ||
| * | ||
| * Copyright (C) 2019 David Shah <[email protected]> | ||
| * | ||
| * 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. | ||
| * | ||
| */ | ||
|
|
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| #include "json_frontend.h" | ||
| #include "frontend_base.h" | ||
| #include "json11.hpp" | ||
| #include "log.h" | ||
| #include "nextpnr.h" | ||
|
|
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| #include <streambuf> | ||
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| NEXTPNR_NAMESPACE_BEGIN | ||
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| using namespace json11; | ||
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| struct JsonFrontendImpl | ||
| { | ||
| // See specification in frontend_base.h | ||
| JsonFrontendImpl(Json &root) : root(root){}; | ||
| Json &root; | ||
| typedef const Json &ModuleDataType; | ||
| typedef const Json &ModulePortDataType; | ||
| typedef const Json &CellDataType; | ||
| typedef const Json &NetnameDataType; | ||
| typedef const Json::array &BitVectorDataType; | ||
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| template <typename TFunc> void foreach_module(TFunc Func) | ||
| { | ||
| for (const auto &mod : root.object_items()) | ||
| Func(mod.first, mod.second); | ||
| } | ||
|
|
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| template <typename TFunc> void foreach_port(const ModuleDataType &mod, TFunc Func) | ||
| { | ||
| const auto &ports = mod["ports"]; | ||
| if (ports.is_null()) | ||
| return; | ||
| for (const auto &port : ports.object_items()) | ||
| Func(port.first, port.second); | ||
| } | ||
|
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| template <typename TFunc> void foreach_cell(const ModuleDataType &mod, TFunc Func) | ||
| { | ||
| const auto &cells = mod["cells"]; | ||
| if (cells.is_null()) | ||
| return; | ||
| for (const auto &cell : cells.object_items()) | ||
| Func(cell.first, cell.second); | ||
| } | ||
|
|
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| template <typename TFunc> void foreach_netname(const ModuleDataType &mod, TFunc Func) | ||
| { | ||
| const auto &netnames = mod["netnames"]; | ||
| if (netnames.is_null()) | ||
| return; | ||
| for (const auto &netname : netnames.object_items()) | ||
| Func(netname.first, netname.second); | ||
| } | ||
|
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| PortType lookup_portdir(const std::string &dir) | ||
| { | ||
| if (dir == "input") | ||
| return PORT_IN; | ||
| else if (dir == "inout") | ||
| return PORT_INOUT; | ||
| else if (dir == "output") | ||
| return PORT_OUT; | ||
| else | ||
| NPNR_ASSERT_FALSE("invalid json port direction"); | ||
| } | ||
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| PortType get_port_dir(const ModulePortDataType &port) { return lookup_portdir(port["direction"].string_value()); } | ||
|
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| int get_array_offset(const Json &obj) | ||
| { | ||
| auto offset = obj["offset"]; | ||
| return offset.is_null() ? 0 : offset.int_value(); | ||
| } | ||
|
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| bool is_array_upto(const Json &obj) | ||
| { | ||
| auto upto = obj["upto"]; | ||
| return upto.is_null() ? false : bool(upto.int_value()); | ||
| } | ||
|
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| const BitVectorDataType &get_port_bits(const ModulePortDataType &port) { return port["bits"].array_items(); } | ||
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| const std::string &get_cell_type(const CellDataType &cell) { return cell["type"].string_value(); } | ||
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| Property parse_property(const Json &val) | ||
| { | ||
| if (val.is_number()) | ||
| return Property(val.int_value(), 32); | ||
| else | ||
| return Property::from_string(val.string_value()); | ||
| } | ||
|
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| template <typename TFunc> void foreach_attr(const Json &obj, TFunc Func) | ||
| { | ||
| const auto &attrs = obj["attributes"]; | ||
| if (attrs.is_null()) | ||
| return; | ||
| for (const auto &attr : attrs.object_items()) { | ||
| Func(attr.first, parse_property(attr.second)); | ||
| } | ||
| } | ||
|
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| template <typename TFunc> void foreach_param(const Json &obj, TFunc Func) | ||
| { | ||
| const auto ¶ms = obj["parameters"]; | ||
| if (params.is_null()) | ||
| return; | ||
| for (const auto ¶m : params.object_items()) { | ||
| Func(param.first, parse_property(param.second)); | ||
| } | ||
| } | ||
|
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| template <typename TFunc> void foreach_port_dir(const CellDataType &cell, TFunc Func) | ||
| { | ||
| for (const auto &pdir : cell["port_directions"].object_items()) | ||
| Func(pdir.first, lookup_portdir(pdir.second.string_value())); | ||
| } | ||
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| template <typename TFunc> void foreach_port_conn(const CellDataType &cell, TFunc Func) | ||
| { | ||
| for (const auto &pconn : cell["connections"].object_items()) | ||
| Func(pconn.first, pconn.second); | ||
| } | ||
|
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| template <typename TFunc> const BitVectorDataType &get_net_bits(const NetnameDataType &net) | ||
| { | ||
| return net["bits"].array_items(); | ||
| } | ||
|
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| int get_vector_length(const BitVectorDataType &bits) { return int(bits.size()); } | ||
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| bool is_vector_bit_constant(const BitVectorDataType &bits, int i) | ||
| { | ||
| NPNR_ASSERT(i < int(bits.size())); | ||
| return bits[i].is_string(); | ||
| } | ||
|
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| char get_vector_bit_constval(const BitVectorDataType &bits, int i) | ||
| { | ||
| auto s = bits.at(i).string_value(); | ||
| NPNR_ASSERT(s.size() == 1); | ||
| return s.at(0); | ||
| } | ||
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| int get_vector_bit_signal(const BitVectorDataType &bits, int i) | ||
| { | ||
| NPNR_ASSERT(bits.at(i).is_number()); | ||
| return bits.at(i).int_value(); | ||
| } | ||
| }; | ||
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| bool parse_json(std::istream &in, const std::string &filename, Context *ctx) | ||
| { | ||
| Json root; | ||
| { | ||
| if (!in) | ||
| log_error("Failed to open JSON file '%s'.\n", filename.c_str()); | ||
| std::string json_str((std::istreambuf_iterator<char>(in)), std::istreambuf_iterator<char>()); | ||
| std::string error; | ||
| root = Json::parse(json_str, error, JsonParse::COMMENTS); | ||
| if (root.is_null()) | ||
| log_error("Failed to parse JSON file '%s': %s.\n", filename.c_str(), error.c_str()); | ||
| } | ||
| run_frontend(ctx, JsonFrontendImpl(root)); | ||
| return true; | ||
| } | ||
|
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| NEXTPNR_NAMESPACE_END |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,26 @@ | ||
| /* | ||
| * nextpnr -- Next Generation Place and Route | ||
| * | ||
| * Copyright (C) 2019 David Shah <[email protected]> | ||
| * | ||
| * 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. | ||
| * | ||
| */ | ||
|
|
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| #include "nextpnr.h" | ||
|
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| NEXTPNR_NAMESPACE_BEGIN | ||
|
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| bool parse_json(std::istream &in, const std::string &filename, Context *ctx); | ||
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| NEXTPNR_NAMESPACE_END |