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50 lines
1.9 KiB
C
50 lines
1.9 KiB
C
/* Copyright 2014-2015 Samsung Electronics Co., Ltd.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef BYTECODE_DATA_H
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#define BYTECODE_DATA_H
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#include "opcodes.h"
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#include "mem-allocator.h"
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/*
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* All literals are kept in the 'literals' array.
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* Literal structure doesn't hold real string. All program-specific strings
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* are kept in the 'strings_buffer' and literal has pointer to this buffer.
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*
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* Literal id is its index in 'literals' array of bytecode_data_t structure.
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*
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* Bytecode, which is kept in the 'instrs' field, is divided into blocks
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* of 'BLOCK_SIZE' operands. Every block has its own numbering of literals.
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* Literal uid could be in range [0, 127] in every block.
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*
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* To map uid to literal id 'lit_id_hash' table is used.
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*/
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#define BLOCK_SIZE 64u
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/**
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* Header of byte-code memory region, containing byte-code array and literal identifiers hash table
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*/
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typedef struct __attribute__ ((aligned (MEM_ALIGNMENT))) bytecode_data_header_t
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{
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vm_instr_t *instrs_p; /**< pointer to the bytecode */
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vm_instr_counter_t instrs_count; /**< number of instructions in the byte-code array */
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mem_cpointer_t lit_id_hash_cp; /**< pointer to literal identifiers hash table
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* See also: lit_id_hash_table_init */
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mem_cpointer_t next_header_cp; /**< pointer to next instructions data header */
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} bytecode_data_header_t;
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#endif /* BYTECODE_DATA_H */
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