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/*
* Copyright (C) Igor Sysoev
* Copyright (C) NGINX, Inc.
*/
#ifndef _NJS_VMCODE_H_INCLUDED_
#define _NJS_VMCODE_H_INCLUDED_
/*
* Negative return values handled by nJSVM interpreter as special events.
* The values must be in range from -1 to -11, because -12 is minimal jump
* offset on 32-bit platforms.
* 0 (NJS_OK) : njs_vmcode_stop() has stopped execution,
* execution successfully finished
* -1 (NJS_ERROR): error or exception;
* -2 .. -11: not used.
*/
/* The last return value which preempts execution. */
#define NJS_PREEMPT (-11)
typedef intptr_t njs_jump_off_t;
typedef uint8_t njs_vmcode_operation_t;
#define NJS_VMCODE_3OPERANDS 0
#define NJS_VMCODE_2OPERANDS 1
#define NJS_VMCODE_1OPERAND 2
#define NJS_VMCODE_NO_OPERAND 3
#define NJS_VMCODE_NO_RETVAL 0
#define NJS_VMCODE_RETVAL 1
#define VMCODE0(n) (n)
#define VMCODE1(n) ((n) + 128)
#define NJS_VMCODE_STOP VMCODE0(0)
#define NJS_VMCODE_JUMP VMCODE0(1)
#define NJS_VMCODE_PROPERTY_SET VMCODE0(2)
#define NJS_VMCODE_PROPERTY_ACCESSOR VMCODE0(3)
#define NJS_VMCODE_IF_TRUE_JUMP VMCODE0(4)
#define NJS_VMCODE_IF_FALSE_JUMP VMCODE0(5)
#define NJS_VMCODE_IF_EQUAL_JUMP VMCODE0(6)
#define NJS_VMCODE_PROPERTY_INIT VMCODE0(7)
#define NJS_VMCODE_RETURN VMCODE0(8)
#define NJS_VMCODE_FUNCTION_FRAME VMCODE0(9)
#define NJS_VMCODE_METHOD_FRAME VMCODE0(10)
#define NJS_VMCODE_FUNCTION_CALL VMCODE0(11)
#define NJS_VMCODE_PROPERTY_NEXT VMCODE0(16)
#define NJS_VMCODE_THIS VMCODE0(17)
#define NJS_VMCODE_ARGUMENTS VMCODE0(18)
#define NJS_VMCODE_TRY_START VMCODE0(32)
#define NJS_VMCODE_THROW VMCODE0(33)
#define NJS_VMCODE_TRY_BREAK VMCODE0(34)
#define NJS_VMCODE_TRY_CONTINUE VMCODE0(35)
#define NJS_VMCODE_TRY_END VMCODE0(37)
#define NJS_VMCODE_CATCH VMCODE0(38)
#define NJS_VMCODE_FINALLY VMCODE0(39)
#define NJS_VMCODE_REFERENCE_ERROR VMCODE0(40)
#define NJS_VMCODE_NORET 127
#define NJS_VMCODE_MOVE VMCODE1(0)
#define NJS_VMCODE_PROPERTY_GET VMCODE1(1)
#define NJS_VMCODE_INCREMENT VMCODE1(2)
#define NJS_VMCODE_POST_INCREMENT VMCODE1(3)
#define NJS_VMCODE_DECREMENT VMCODE1(4)
#define NJS_VMCODE_POST_DECREMENT VMCODE1(5)
#define NJS_VMCODE_TRY_RETURN VMCODE1(6)
#define NJS_VMCODE_LESS VMCODE1(8)
#define NJS_VMCODE_GREATER VMCODE1(9)
#define NJS_VMCODE_LESS_OR_EQUAL VMCODE1(10)
#define NJS_VMCODE_GREATER_OR_EQUAL VMCODE1(11)
#define NJS_VMCODE_ADDITION VMCODE1(12)
#define NJS_VMCODE_EQUAL VMCODE1(13)
#define NJS_VMCODE_NOT_EQUAL VMCODE1(14)
#define NJS_VMCODE_SUBSTRACTION VMCODE1(16)
#define NJS_VMCODE_MULTIPLICATION VMCODE1(17)
#define NJS_VMCODE_EXPONENTIATION VMCODE1(18)
#define NJS_VMCODE_DIVISION VMCODE1(19)
#define NJS_VMCODE_REMAINDER VMCODE1(20)
#define NJS_VMCODE_BITWISE_AND VMCODE1(21)
#define NJS_VMCODE_BITWISE_OR VMCODE1(22)
#define NJS_VMCODE_BITWISE_XOR VMCODE1(23)
#define NJS_VMCODE_LEFT_SHIFT VMCODE1(24)
#define NJS_VMCODE_RIGHT_SHIFT VMCODE1(25)
#define NJS_VMCODE_UNSIGNED_RIGHT_SHIFT VMCODE1(26)
#define NJS_VMCODE_OBJECT_COPY VMCODE1(27)
#define NJS_VMCODE_TEMPLATE_LITERAL VMCODE1(28)
#define NJS_VMCODE_PROPERTY_IN VMCODE1(29)
#define NJS_VMCODE_PROPERTY_DELETE VMCODE1(30)
#define NJS_VMCODE_PROPERTY_FOREACH VMCODE1(31)
#define NJS_VMCODE_STRICT_EQUAL VMCODE1(32)
#define NJS_VMCODE_STRICT_NOT_EQUAL VMCODE1(33)
#define NJS_VMCODE_TEST_IF_TRUE VMCODE1(34)
#define NJS_VMCODE_TEST_IF_FALSE VMCODE1(35)
#define NJS_VMCODE_UNARY_PLUS VMCODE1(36)
#define NJS_VMCODE_UNARY_NEGATION VMCODE1(37)
#define NJS_VMCODE_BITWISE_NOT VMCODE1(38)
#define NJS_VMCODE_LOGICAL_NOT VMCODE1(39)
#define NJS_VMCODE_OBJECT VMCODE1(40)
#define NJS_VMCODE_ARRAY VMCODE1(41)
#define NJS_VMCODE_FUNCTION VMCODE1(42)
#define NJS_VMCODE_REGEXP VMCODE1(43)
#define NJS_VMCODE_INSTANCE_OF VMCODE1(44)
#define NJS_VMCODE_TYPEOF VMCODE1(45)
#define NJS_VMCODE_VOID VMCODE1(46)
#define NJS_VMCODE_DELETE VMCODE1(47)
#define NJS_VMCODE_NOP 255
typedef struct {
njs_vmcode_operation_t operation;
uint8_t operands; /* 2 bits */
} njs_vmcode_t;
typedef struct {
njs_vmcode_t code;
njs_index_t operand1;
njs_index_t operand2;
njs_index_t operand3;
} njs_vmcode_generic_t;
typedef struct {
njs_vmcode_t code;
njs_index_t index;
} njs_vmcode_1addr_t;
typedef struct {
njs_vmcode_t code;
njs_index_t dst;
njs_index_t src;
} njs_vmcode_2addr_t;
typedef struct {
njs_vmcode_t code;
njs_index_t dst;
njs_index_t src1;
njs_index_t src2;
} njs_vmcode_3addr_t;
typedef struct {
njs_vmcode_t code;
njs_index_t dst;
njs_index_t src;
} njs_vmcode_move_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
} njs_vmcode_object_t;
typedef struct {
njs_vmcode_t code;
njs_index_t dst;
} njs_vmcode_this_t;
typedef struct {
njs_vmcode_t code;
njs_index_t dst;
} njs_vmcode_arguments_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
uintptr_t length;
uint8_t ctor; /* 1 bit */
} njs_vmcode_array_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
} njs_vmcode_template_literal_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
njs_function_lambda_t *lambda;
} njs_vmcode_function_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
njs_regexp_pattern_t *pattern;
} njs_vmcode_regexp_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
njs_index_t object;
} njs_vmcode_object_copy_t;
typedef struct {
njs_vmcode_t code;
njs_jump_off_t offset;
} njs_vmcode_jump_t;
typedef struct {
njs_vmcode_t code;
njs_jump_off_t offset;
njs_index_t cond;
} njs_vmcode_cond_jump_t;
typedef struct {
njs_vmcode_t code;
njs_jump_off_t offset;
njs_index_t value1;
njs_index_t value2;
} njs_vmcode_equal_jump_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
njs_index_t value;
njs_jump_off_t offset;
} njs_vmcode_test_jump_t;
typedef struct {
njs_vmcode_t code;
njs_index_t value;
njs_index_t object;
njs_index_t property;
} njs_vmcode_prop_get_t;
typedef struct {
njs_vmcode_t code;
njs_index_t value;
njs_index_t object;
njs_index_t property;
} njs_vmcode_prop_set_t;
typedef struct {
njs_vmcode_t code;
njs_index_t value;
njs_index_t object;
njs_index_t property;
uint8_t type;
} njs_vmcode_prop_accessor_t;
typedef struct {
njs_vmcode_t code;
njs_index_t next;
njs_index_t object;
njs_jump_off_t offset;
} njs_vmcode_prop_foreach_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
njs_index_t object;
njs_index_t next;
njs_jump_off_t offset;
} njs_vmcode_prop_next_t;
typedef struct {
njs_vmcode_t code;
njs_index_t value;
njs_index_t constructor;
njs_index_t object;
} njs_vmcode_instance_of_t;
typedef struct {
njs_vmcode_t code;
njs_index_t nargs;
njs_index_t name;
uint8_t ctor; /* 1 bit */
} njs_vmcode_function_frame_t;
typedef struct {
njs_vmcode_t code;
njs_index_t nargs;
njs_index_t object;
njs_index_t method;
uint8_t ctor; /* 1 bit */
} njs_vmcode_method_frame_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
} njs_vmcode_function_call_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
} njs_vmcode_return_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
} njs_vmcode_stop_t;
typedef struct {
njs_vmcode_t code;
njs_jump_off_t offset;
njs_index_t exception_value;
njs_index_t exit_value;
} njs_vmcode_try_start_t;
typedef struct {
njs_vmcode_t code;
njs_jump_off_t offset;
njs_index_t exit_value;
} njs_vmcode_try_trampoline_t;
typedef struct {
njs_vmcode_t code;
njs_jump_off_t offset;
njs_index_t exception;
} njs_vmcode_catch_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
} njs_vmcode_throw_t;
typedef struct {
njs_vmcode_t code;
njs_jump_off_t offset;
} njs_vmcode_try_end_t;
typedef struct {
njs_vmcode_t code;
njs_index_t save;
njs_index_t retval;
njs_jump_off_t offset;
} njs_vmcode_try_return_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
njs_index_t exit_value;
njs_jump_off_t continue_offset;
njs_jump_off_t break_offset;
} njs_vmcode_finally_t;
typedef struct {
njs_vmcode_t code;
njs_str_t name;
njs_str_t file;
uint32_t token_line;
} njs_vmcode_reference_error_t;
njs_int_t njs_vmcode_interpreter(njs_vm_t *vm, u_char *pc);
#endif /* _NJS_VMCODE_H_INCLUDED_ */