1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
package compiler
// Opcode represents a single byte operation code.
type Opcode = byte
// List of opcodes
const (
OpConstant Opcode = iota // Load constant
OpBComplement // bitwise complement
OpPop // Pop
OpTrue // Push true
OpFalse // Push false
OpEqual // Equal ==
OpNotEqual // Not equal !=
OpMinus // Minus -
OpLNot // Logical not !
OpJumpFalsy // Jump if falsy
OpAndJump // Logical AND jump
OpOrJump // Logical OR jump
OpJump // Jump
OpNull // Push null
OpArray // Array object
OpMap // Map object
OpError // Error object
OpImmutable // Immutable object
OpIndex // Index operation
OpSliceIndex // Slice operation
OpCall // Call function
OpReturn // Return
OpGetGlobal // Get global variable
OpSetGlobal // Set global variable
OpSetSelGlobal // Set global variable using selectors
OpGetLocal // Get local variable
OpSetLocal // Set local variable
OpDefineLocal // Define local variable
OpSetSelLocal // Set local variable using selectors
OpGetFreePtr // Get free variable pointer object
OpGetFree // Get free variables
OpSetFree // Set free variables
OpGetLocalPtr // Get local variable as a pointer
OpSetSelFree // Set free variables using selectors
OpGetBuiltin // Get builtin function
OpClosure // Push closure
OpIteratorInit // Iterator init
OpIteratorNext // Iterator next
OpIteratorKey // Iterator key
OpIteratorValue // Iterator value
OpBinaryOp // Binary Operation
)
// OpcodeNames is opcode names.
var OpcodeNames = [...]string{
OpConstant: "CONST",
OpPop: "POP",
OpTrue: "TRUE",
OpFalse: "FALSE",
OpBComplement: "NEG",
OpEqual: "EQL",
OpNotEqual: "NEQ",
OpMinus: "NEG",
OpLNot: "NOT",
OpJumpFalsy: "JMPF",
OpAndJump: "ANDJMP",
OpOrJump: "ORJMP",
OpJump: "JMP",
OpNull: "NULL",
OpGetGlobal: "GETG",
OpSetGlobal: "SETG",
OpSetSelGlobal: "SETSG",
OpArray: "ARR",
OpMap: "MAP",
OpError: "ERROR",
OpImmutable: "IMMUT",
OpIndex: "INDEX",
OpSliceIndex: "SLICE",
OpCall: "CALL",
OpReturn: "RET",
OpGetLocal: "GETL",
OpSetLocal: "SETL",
OpDefineLocal: "DEFL",
OpSetSelLocal: "SETSL",
OpGetBuiltin: "BUILTIN",
OpClosure: "CLOSURE",
OpGetFreePtr: "GETFP",
OpGetFree: "GETF",
OpSetFree: "SETF",
OpGetLocalPtr: "GETLP",
OpSetSelFree: "SETSF",
OpIteratorInit: "ITER",
OpIteratorNext: "ITNXT",
OpIteratorKey: "ITKEY",
OpIteratorValue: "ITVAL",
OpBinaryOp: "BINARYOP",
}
// OpcodeOperands is the number of operands.
var OpcodeOperands = [...][]int{
OpConstant: {2},
OpPop: {},
OpTrue: {},
OpFalse: {},
OpBComplement: {},
OpEqual: {},
OpNotEqual: {},
OpMinus: {},
OpLNot: {},
OpJumpFalsy: {2},
OpAndJump: {2},
OpOrJump: {2},
OpJump: {2},
OpNull: {},
OpGetGlobal: {2},
OpSetGlobal: {2},
OpSetSelGlobal: {2, 1},
OpArray: {2},
OpMap: {2},
OpError: {},
OpImmutable: {},
OpIndex: {},
OpSliceIndex: {},
OpCall: {1},
OpReturn: {1},
OpGetLocal: {1},
OpSetLocal: {1},
OpDefineLocal: {1},
OpSetSelLocal: {1, 1},
OpGetBuiltin: {1},
OpClosure: {2, 1},
OpGetFreePtr: {1},
OpGetFree: {1},
OpSetFree: {1},
OpGetLocalPtr: {1},
OpSetSelFree: {1, 1},
OpIteratorInit: {},
OpIteratorNext: {},
OpIteratorKey: {},
OpIteratorValue: {},
OpBinaryOp: {1},
}
// ReadOperands reads operands from the bytecode.
func ReadOperands(numOperands []int, ins []byte) (operands []int, offset int) {
for _, width := range numOperands {
switch width {
case 1:
operands = append(operands, int(ins[offset]))
case 2:
operands = append(operands, int(ins[offset+1])|int(ins[offset])<<8)
}
offset += width
}
return
}
|
