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https://github.com/jerryscript-project/jerryscript.git
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51e3c4455a
Direct strings are a new type of direct ecma-values (no memory allocation is needed for encoding them) in JerryScript. Currently magic strings, external magic strings and uint values are encoded as direct strings. The constant pool of JerryScript byte-code is changed to hold ecma-values rather than cpointers to support direct strings. JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
65 lines
2.3 KiB
C
65 lines
2.3 KiB
C
/* Copyright JS Foundation and other contributors, http://js.foundation
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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 VM_DEFINES_H
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#define VM_DEFINES_H
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#include "byte-code.h"
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#include "ecma-globals.h"
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/** \addtogroup vm Virtual machine
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* @{
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*
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* \addtogroup vm_executor Executor
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* @{
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*/
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/**
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* Helpers for updating uint16_t values.
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*/
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#define VM_PLUS_EQUAL_U16(base, value) (base) = (uint16_t) ((base) + (value))
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#define VM_MINUS_EQUAL_U16(base, value) (base) = (uint16_t) ((base) - (value))
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/**
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* Instruction counter / position
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*/
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typedef const uint8_t *vm_instr_counter_t;
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/**
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* Context of interpreter, related to a JS stack frame
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*/
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typedef struct vm_frame_ctx_t
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{
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const ecma_compiled_code_t *bytecode_header_p; /**< currently executed byte-code data */
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uint8_t *byte_code_p; /**< current byte code pointer */
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uint8_t *byte_code_start_p; /**< byte code start pointer */
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ecma_value_t *registers_p; /**< register start pointer */
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ecma_value_t *stack_top_p; /**< stack top pointer */
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ecma_value_t *literal_start_p; /**< literal list start pointer */
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ecma_object_t *lex_env_p; /**< current lexical environment */
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struct vm_frame_ctx_t *prev_context_p; /**< previous context */
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ecma_value_t this_binding; /**< this binding */
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ecma_value_t call_block_result; /**< preserve block result during a call */
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uint16_t context_depth; /**< current context depth */
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uint8_t is_eval_code; /**< eval mode flag */
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uint8_t call_operation; /**< perform a call or construct operation */
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} vm_frame_ctx_t;
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/**
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* @}
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* @}
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*/
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#endif /* !VM_DEFINES_H */
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