mirror of
https://github.com/jerryscript-project/jerryscript.git
synced 2025-12-15 16:29:21 +00:00
ab2abfa8b3
Related issue: #203 JerryScript-DCO-1.0-Signed-off-by: Ruben Ayrapetyan r.ayrapetyan@samsung.com
69 lines
2.4 KiB
C
69 lines
2.4 KiB
C
/* Copyright 2014-2015 Samsung Electronics Co., Ltd.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef BYTECODE_DATA_H
|
|
#define BYTECODE_DATA_H
|
|
|
|
#include "opcodes.h"
|
|
#include "lit-id-hash-table.h"
|
|
#include "mem-allocator.h"
|
|
|
|
/*
|
|
* All literals are kept in the 'literals' array.
|
|
* Literal structure doesn't hold real string. All program-specific strings
|
|
* are kept in the 'strings_buffer' and literal has pointer to this buffer.
|
|
*
|
|
* Literal id is its index in 'literals' array of bytecode_data_t structure.
|
|
*
|
|
* Bytecode, which is kept in the 'opcodes' field, is divided into blocks
|
|
* of 'BLOCK_SIZE' operands. Every block has its own numbering of literals.
|
|
* Literal uid could be in range [0, 127] in every block.
|
|
*
|
|
* To map uid to literal id 'lit_id_hash' table is used.
|
|
*/
|
|
#define BLOCK_SIZE 64
|
|
|
|
/**
|
|
* Header of byte-code memory region, containing byte-code array and literal identifiers hash table
|
|
*/
|
|
typedef struct __attribute__ ((aligned (MEM_ALIGNMENT)))
|
|
{
|
|
mem_cpointer_t lit_id_hash_cp; /**< pointer to literal identifiers hash table
|
|
* See also: lit_id_hash_table_init */
|
|
mem_cpointer_t next_opcodes_cp; /**< pointer to next byte-code memory region */
|
|
opcode_counter_t instructions_number; /**< number of instructions in the byte-code array */
|
|
} opcodes_header_t;
|
|
|
|
typedef struct
|
|
{
|
|
const ecma_char_t *strings_buffer;
|
|
const opcode_t *opcodes;
|
|
opcode_counter_t opcodes_count;
|
|
} bytecode_data_t;
|
|
|
|
/**
|
|
* Macros to get a pointer to bytecode header by pointer to opcodes start
|
|
*/
|
|
#define GET_BYTECODE_HEADER(opcodes) ((opcodes_header_t *) (((uint8_t *) (opcodes)) - sizeof (opcodes_header_t)))
|
|
|
|
/**
|
|
* Macros to get a hash table corresponding to a bytecode region
|
|
*/
|
|
#define GET_HASH_TABLE_FOR_BYTECODE(opcodes) (MEM_CP_GET_POINTER (lit_id_hash_table, \
|
|
GET_BYTECODE_HEADER (opcodes)->lit_id_hash_cp))
|
|
|
|
|
|
#endif // BYTECODE_DATA_H
|