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/*
* Copyright (c) 2021 Arm Limited.
*
* SPDX-License-Identifier: MIT
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef SRC_RUNTIME_CL_MLGO_MLGO_PARSER_H
#define SRC_RUNTIME_CL_MLGO_MLGO_PARSER_H
#include "src/runtime/CL/mlgo/MLGOHeuristics.h"
#include <deque>
#include <istream>
#include <string>
#include <utility>
/** A DotMLGO file parser (LL(k) parser)
*
* The grammar of DotMLGO is defined as the following ENBF:
*
* delim = "," | "\n"; // Note that delimiters are omitted from the definition below
*
* mlgo = header, heuristics-table, {heuristic-tree};
*
* header = "<header>", gemm-version, ip-type, "</header>";
* gemm-version = "gemm-version", "[", int, int, int, "]";
* ip-type = "ip-type", ("gpu" | "cpu");
*
* heiristics-table = "<heuristics-table>", {heuristics-table-entry}, "</heuristics-table>";
* heuristics-table-entry = entry-id, ip-name, num-cores, data-type, gpu-priority, gpu-behavior, heuristic-type, free-vars;
* entry-id = int;
* ip-name = char-sequence;
* num-cores = int;
* data-type = "f32" | "f16" | "qasymm8";
* gpu-priority = "best-performance" | "best-memory-usage";
* gpu-behavior = "static" | "dynamic";
* heuristic-type = "gemm-type" | "gemm-config-native" | "gemm-config-reshaped-only-rhs" | "gemm-config-reshaped";
* free-vars = "[", {char-sequence}, "]";
*
* heuristic-tree = "<heuristic", entry-id, ">", {tree-node}, "</heuristic>";
* tree-node = branch-node | leaf-node;
* branch-node = "b", entry-id, lhs-type, lhs-value, conditional-op, rhs-type, rhs-value, true-node, false-node;
* lhs-type = comparator-type;
* lhs-value = comparator-value;
* rhs-type = comparator-type;
* rhs-value = comparator-value;
* comparator-type = "var" | "num" | "enum";
* comparator-value = char-sequence | float;
* conditional-op = "<" | "<=" | "==" | ">=" | ">";
* true-node = entry-id;
* false-node = entry-id;
* leaf-node = "l", entry-id, heuristic-type, leaf-value;
* leaf-value = gemm-type | gemm-config-native | gemm-config-reshaped-only-rhs | gemm-config-reshaped
* gemm-type = "native" | "reshaped-only-rhs" | "reshaped";
* gemm-config-native = "[", int, int, int, "]";
* gemm-config-reshaped-only-rhs = "[", int, int, int, int, bool, bool, bool, "]";
* gemm-config-reshaped = "[", int, int, int, int, int, bool, bool, bool, bool, "]";
*/
namespace arm_compute
{
namespace mlgo
{
namespace parser
{
/** Type of Token */
enum class TokenType
{
L_List = '[', /**< List open */
R_List = ']', /**< List close */
Int, /**< Integral */
Float, /**< Floating */
Text, /**< Text/String */
End, /**< End of stream */
};
struct CharPosition
{
bool operator==(const CharPosition &other) const
{
return ln == other.ln && col == other.col;
}
size_t ln{ 0 };
size_t col{ 0 };
};
/** Token */
struct Token
{
Token(TokenType t, std::string v, CharPosition pos)
: type{ t }, value{ v }, pos{ pos }
{
}
bool operator==(const Token &other) const
{
return type == other.type && value == other.value && pos == other.pos;
}
TokenType type; /**< Token type */
std::string value; /**< Token value */
CharPosition pos;
};
/** A stream of token */
class TokenStream
{
// NOTE: _tokens is never empty. The end of token stream is signalled by the End Token
public:
static constexpr size_t max_look_ahead = 10;
public:
/** Constructor
*
* @param[in] s Input stream
* @param[in] delims Delimiter characters packed in a string. Each char from the string can be used as a delim on its own
*/
TokenStream(std::istream &s, const std::string &delims = ",\n");
/** Check if there're more (non-End) Tokens
* @return true If there are more tokens
* @return false If reached end of stream (only End token)
*/
explicit operator bool() const;
/** Get and pop off the current token
*
* @return Token
*/
Token take();
/** Peek the next ith token
*
* @param[in] i The next ith token. i < @ref max_look_ahead.
*
* @return Token
*/
Token peek(size_t i = 0);
/** Get the position of the current token
*
* @return CharPosition
*/
CharPosition current_pos() const
{
return _tokens.front().pos;
}
private:
void read();
Token recognize_tok(char ch);
Token num_st(std::string value = "");
Token float_after_dp_st(std::string value = "");
Token text_st(std::string value = "");
bool reached_end() const;
bool is_delim(char ch) const;
std::string _delims;
std::istream &_istream;
std::deque<Token> _tokens;
CharPosition _lookahead_pos;
};
/** Parse and construct a @ref MLGOHeuristics from input stream
*
* @param[in] in Input stream
*
* @return MLGOHeuristics
*/
std::pair<bool, MLGOHeuristics> parse_mlgo(std::istream &in);
} // namespace parser
} // namespace mlgo
} // namespace arm_compute
#endif //SRC_RUNTIME_CL_MLGO_MLGO_PARSER_H
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