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eed84a7dd9
The number of delete opcodes is reduced to two from six. The range of numbers which can be included in the byte code is doubled from (-127,127) to (-256,256). JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
297 lines
10 KiB
C
297 lines
10 KiB
C
/* Copyright 2014-2016 Samsung Electronics Co., Ltd.
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* Copyright 2015-2016 University of Szeged.
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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_H
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#define VM_H
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#include "ecma-globals.h"
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#include "lit-cpointer.h"
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#include "jrt.h"
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#include "vm-defines.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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* Each CBC opcode is transformed to three vm opcodes:
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*
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* - first opcode is a "get arguments" opcode which specifies
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* the type (register, literal, stack, etc.) and number
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* (from 0 to 2) of input arguments
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* - second opcode is a "group" opcode which specifies
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* the actual operation (add, increment, call, etc.)
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* - third opcode is a "put result" opcode which specifies
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* the destination where the result is stored (register,
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* stack, etc.)
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*/
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/**
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* Branch argument is a backward branch
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*/
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#define VM_OC_BACKWARD_BRANCH 0x4000
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/**
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* Position of "get arguments" opcode.
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*/
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#define VM_OC_GET_ARGS_SHIFT 7
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/**
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* Mask of "get arguments" opcode.
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*/
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#define VM_OC_GET_ARGS_MASK 0x7
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/**
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* Generate the binary representation of a "get arguments" opcode.
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*/
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#define VM_OC_GET_ARGS_CREATE_INDEX(V) (((V) & VM_OC_GET_ARGS_MASK) << VM_OC_GET_ARGS_SHIFT)
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/**
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* Extract the "get arguments" opcode.
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*/
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#define VM_OC_GET_ARGS_INDEX(O) ((O) & (VM_OC_GET_ARGS_MASK << VM_OC_GET_ARGS_SHIFT))
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/**
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* Checks whether the result is stored somewhere.
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*/
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#define VM_OC_HAS_GET_ARGS(V) ((V) & (VM_OC_GET_ARGS_MASK << VM_OC_GET_ARGS_SHIFT))
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/**
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* Argument getters that are part of the opcodes.
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*/
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typedef enum
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{
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VM_OC_GET_NONE = VM_OC_GET_ARGS_CREATE_INDEX (0), /**< do nothing */
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VM_OC_GET_BRANCH = VM_OC_GET_ARGS_CREATE_INDEX (1), /**< branch argument */
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VM_OC_GET_STACK = VM_OC_GET_ARGS_CREATE_INDEX (2), /**< pop one element from the stack */
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VM_OC_GET_STACK_STACK = VM_OC_GET_ARGS_CREATE_INDEX (3), /**< pop two elements from the stack */
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VM_OC_GET_LITERAL = VM_OC_GET_ARGS_CREATE_INDEX (4), /**< resolve literal */
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VM_OC_GET_LITERAL_LITERAL = VM_OC_GET_ARGS_CREATE_INDEX (5), /**< resolve two literals */
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VM_OC_GET_STACK_LITERAL = VM_OC_GET_ARGS_CREATE_INDEX (6), /**< pop one element from the stack
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* and resolve a literal */
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VM_OC_GET_THIS_LITERAL = VM_OC_GET_ARGS_CREATE_INDEX (7), /**< get this and resolve a literal */
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} vm_oc_get_types;
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/**
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* Mask of "group" opcode.
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*/
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#define VM_OC_GROUP_MASK 0x7f
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/**
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* Extract the "group" opcode.
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*/
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#define VM_OC_GROUP_GET_INDEX(O) ((O) & VM_OC_GROUP_MASK)
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/**
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* Opcodes.
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*/
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typedef enum
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{
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VM_OC_NONE, /**< do nothing */
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VM_OC_POP, /**< pop from stack */
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VM_OC_POP_BLOCK, /**< pop block */
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VM_OC_PUSH, /**< push one element */
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VM_OC_PUSH_TWO, /**< push two elements onto the stack */
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VM_OC_PUSH_THREE, /**< push three elements onto the stack */
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VM_OC_PUSH_UNDEFINED, /**< push undefined value */
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VM_OC_PUSH_TRUE, /**< push true value */
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VM_OC_PUSH_FALSE, /**< push false value */
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VM_OC_PUSH_NULL, /**< push null value */
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VM_OC_PUSH_THIS, /**< push this */
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VM_OC_PUSH_NUMBER_0, /**< push number zero */
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VM_OC_PUSH_NUMBER_POS_BYTE, /**< push number between 1 and 256 */
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VM_OC_PUSH_NUMBER_NEG_BYTE, /**< push number between -1 and -256 */
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VM_OC_PUSH_OBJECT, /**< push object */
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VM_OC_SET_PROPERTY, /**< set property */
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VM_OC_SET_GETTER, /**< set getter */
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VM_OC_SET_SETTER, /**< set setter */
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VM_OC_PUSH_UNDEFINED_BASE, /**< push undefined base */
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VM_OC_PUSH_ARRAY, /**< push array */
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VM_OC_PUSH_ELISON, /**< push elison */
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VM_OC_APPEND_ARRAY, /**< append array */
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VM_OC_IDENT_REFERENCE, /**< ident reference */
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VM_OC_PROP_REFERENCE, /**< prop reference */
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VM_OC_PROP_GET, /**< prop get */
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/* These eight opcodes must be in this order. */
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VM_OC_PROP_PRE_INCR, /**< prefix increment of a property */
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VM_OC_PROP_PRE_DECR, /**< prop prefix decrement of a property */
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VM_OC_PROP_POST_INCR, /**< prop postfix increment of a property */
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VM_OC_PROP_POST_DECR, /**< prop postfix decrement of a property */
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VM_OC_PRE_INCR, /**< prefix increment */
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VM_OC_PRE_DECR, /**< prefix decrement */
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VM_OC_POST_INCR, /**< postfix increment */
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VM_OC_POST_DECR, /**< postfix decrement */
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VM_OC_PROP_DELETE, /**< delete property */
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VM_OC_DELETE, /**< delete */
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VM_OC_ASSIGN, /**< assign */
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VM_OC_ASSIGN_PROP, /**< assign property */
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VM_OC_ASSIGN_PROP_THIS, /**< assign prop this */
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VM_OC_RET, /**< return */
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VM_OC_THROW, /**< throw */
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VM_OC_THROW_REFERENCE_ERROR, /**< throw reference error */
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VM_OC_EVAL, /**< eval */
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VM_OC_CALL, /**< call */
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VM_OC_NEW, /**< new */
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VM_OC_JUMP, /**< jump */
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VM_OC_BRANCH_IF_STRICT_EQUAL, /**< branch if stric equal */
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/* These four opcodes must be in this order. */
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VM_OC_BRANCH_IF_TRUE, /**< branch if true */
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VM_OC_BRANCH_IF_FALSE, /**< branch if false */
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VM_OC_BRANCH_IF_LOGICAL_TRUE, /**< branch if logical true */
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VM_OC_BRANCH_IF_LOGICAL_FALSE, /**< branch if logical false */
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VM_OC_PLUS, /**< unary plus */
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VM_OC_MINUS, /**< unary minus */
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VM_OC_NOT, /**< not */
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VM_OC_BIT_NOT, /**< bitwise not */
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VM_OC_VOID, /**< void */
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VM_OC_TYPEOF_IDENT, /**< typeof identifier */
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VM_OC_TYPEOF, /**< typeof */
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VM_OC_ADD, /**< binary add */
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VM_OC_SUB, /**< binary sub */
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VM_OC_MUL, /**< mul */
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VM_OC_DIV, /**< div */
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VM_OC_MOD, /**< mod */
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VM_OC_EQUAL, /**< equal */
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VM_OC_NOT_EQUAL, /**< not equal */
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VM_OC_STRICT_EQUAL, /**< strict equal */
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VM_OC_STRICT_NOT_EQUAL, /**< strict not equal */
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VM_OC_LESS, /**< less */
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VM_OC_GREATER, /**< greater */
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VM_OC_LESS_EQUAL, /**< less equal */
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VM_OC_GREATER_EQUAL, /**< greater equal */
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VM_OC_IN, /**< in */
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VM_OC_INSTANCEOF, /**< instanceof */
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VM_OC_BIT_OR, /**< bitwise or */
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VM_OC_BIT_XOR, /**< bitwise xor */
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VM_OC_BIT_AND, /**< bitwise and */
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VM_OC_LEFT_SHIFT, /**< left shift */
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VM_OC_RIGHT_SHIFT, /**< right shift */
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VM_OC_UNS_RIGHT_SHIFT, /**< unsigned right shift */
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VM_OC_WITH, /**< with */
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VM_OC_FOR_IN_CREATE_CONTEXT, /**< for in create context */
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VM_OC_FOR_IN_GET_NEXT, /**< get next */
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VM_OC_FOR_IN_HAS_NEXT, /**< has next */
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VM_OC_TRY, /**< try */
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VM_OC_CATCH, /**< catch */
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VM_OC_FINALLY, /**< finally */
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VM_OC_CONTEXT_END, /**< context end */
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VM_OC_JUMP_AND_EXIT_CONTEXT, /**< jump and exit context */
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} vm_oc_types;
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/**
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* Decrement operator.
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*/
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#define VM_OC_DECREMENT_OPERATOR_FLAG 0x1
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/**
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* Postfix increment/decrement operator.
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*/
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#define VM_OC_POST_INCR_DECR_OPERATOR_FLAG 0x2
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/**
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* An named variable is updated by the increment/decrement operator.
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*/
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#define VM_OC_IDENT_INCR_DECR_OPERATOR_FLAG 0x4
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/**
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* Jump to target offset if input value is logical false.
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*/
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#define VM_OC_BRANCH_IF_FALSE_FLAG 0x1
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/**
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* Branch optimized for logical and/or opcodes.
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*/
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#define VM_OC_LOGICAL_BRANCH_FLAG 0x2
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/**
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* Position of "put result" opcode.
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*/
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#define VM_OC_PUT_RESULT_SHIFT 10
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/**
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* Mask of "put result" opcode.
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*/
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#define VM_OC_PUT_RESULT_MASK 0xf
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/**
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* Generate a "put result" opcode flag bit.
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*/
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#define VM_OC_PUT_RESULT_CREATE_FLAG(V) (((V) & VM_OC_PUT_RESULT_MASK) << VM_OC_PUT_RESULT_SHIFT)
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/**
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* Checks whether the result is stored somewhere.
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*/
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#define VM_OC_HAS_PUT_RESULT(V) ((V) & (VM_OC_PUT_RESULT_MASK << VM_OC_PUT_RESULT_SHIFT))
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/**
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* Specify where the result is stored
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*/
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typedef enum
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{
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VM_OC_PUT_IDENT = VM_OC_PUT_RESULT_CREATE_FLAG (0x1),
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VM_OC_PUT_REFERENCE = VM_OC_PUT_RESULT_CREATE_FLAG (0x2),
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VM_OC_PUT_STACK = VM_OC_PUT_RESULT_CREATE_FLAG (0x4),
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VM_OC_PUT_BLOCK = VM_OC_PUT_RESULT_CREATE_FLAG (0x8),
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} vm_oc_put_types;
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/**
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* Non-recursive vm_loop: the vm_loop can be suspended
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* to execute a call /construct operation. These return
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* types of the vm_loop tells whether a call operation
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* is in progress or the vm_loop is finished.
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*/
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typedef enum
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{
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VM_NO_EXEC_OP, /**< do nothing */
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VM_EXEC_CALL, /**< invoke a function */
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VM_EXEC_CONSTRUCT, /**< construct a new object */
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} vm_call_operation;
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extern void vm_init (ecma_compiled_code_t *);
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extern void vm_finalize (void);
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extern jerry_completion_code_t vm_run_global (ecma_value_t *);
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extern ecma_value_t vm_run_eval (ecma_compiled_code_t *, bool);
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extern ecma_value_t vm_run (const ecma_compiled_code_t *, ecma_value_t,
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ecma_object_t *, bool, const ecma_value_t *,
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ecma_length_t);
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extern bool vm_is_strict_mode (void);
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extern bool vm_is_direct_eval_form_call (void);
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/**
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* @}
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* @}
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*/
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#endif /* !VM_H */
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