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
|
#include <stdio.h>
#include "debug.h"
#include "value.h"
void disassembleChunk(Chunk *chunk, const char *name) {
printf("== %s ==\n", name);
for (int offset = 0; offset < chunk->count;) {
offset = disassembleInstruction(chunk, offset);
}
}
static int constantInstruction(const char *name, Chunk *chunk, int offset) {
uint8_t constant = chunk->code[offset + 1];
printf("%-16s %4d '", name, constant);
printValue(chunk->constants.values[constant]);
printf("'\n");
return offset + 2;
}
static int simpleInstruction(const char *name, int offset) {
printf("%s\n", name);
return offset + 1;
}
static int byteInstruction(const char *name, Chunk *chunk, int offset) {
uint8_t slot = chunk->code[offset + 1];
printf("%-16s %4d\n", name, slot);
return offset + 2;
}
static int jumpInstruction(const char *name, int sign, Chunk *chunk,
int offset) {
uint16_t jump = (uint16_t)(chunk->code[offset + 1] << 8);
jump |= chunk->code[offset + 2];
printf("%-16s %4d -> %d\n", name, offset, offset + 3 + sign * jump);
return offset + 3;
}
int disassembleInstruction(Chunk *chunk, int offset) {
printf("%04d ", offset);
if (offset > 0 && chunk->lines[offset] == chunk->lines[offset - 1]) {
printf(" | ");
} else {
printf("%4d ", chunk->lines[offset]);
}
uint8_t instruction = chunk->code[offset];
switch (instruction) {
case OP_CONSTANT:
return constantInstruction("OP_CONSTANT", chunk, offset);
case OP_NIL:
return simpleInstruction("OP_NIL", offset);
case OP_TRUE:
return simpleInstruction("OP_TRUE", offset);
case OP_FALSE:
return simpleInstruction("OP_FALSE", offset);
case OP_POP:
return simpleInstruction("OP_POP", offset);
case OP_GET_LOCAL:
return byteInstruction("OP_GET_LOCAL", chunk, offset);
case OP_SET_LOCAL:
return byteInstruction("OP_SET_LOCAL", chunk, offset);
case OP_GET_GLOBAL:
return constantInstruction("OP_GET_GLOBAL", chunk, offset);
case OP_DEFINE_GLOBAL:
return constantInstruction("OP_DEFINE_GLOBAL", chunk, offset);
case OP_SET_GLOBAL:
return constantInstruction("OP_SET_GLOBAL", chunk, offset);
case OP_EQUAL:
return simpleInstruction("OP_EQUAL", offset);
case OP_GREATER:
return simpleInstruction("OP_GREATER", offset);
case OP_LESS:
return simpleInstruction("OP_LESS", offset);
case OP_ADD:
return simpleInstruction("OP_ADD", offset);
case OP_SUBTRACT:
return simpleInstruction("OP_SUBTRACT", offset);
case OP_MULTIPLY:
return simpleInstruction("OP_MULTIPLY", offset);
case OP_DIVIDE:
return simpleInstruction("OP_DIVIDE", offset);
case OP_NOT:
return simpleInstruction("OP_NOT", offset);
case OP_NEGATE:
return simpleInstruction("OP_NEGATE", offset);
case OP_PRINT:
return simpleInstruction("OP_PRINT", offset);
case OP_JUMP:
return jumpInstruction("OP_JUMP", 1, chunk, offset);
case OP_JUMP_IF_FALSE:
return jumpInstruction("OP_JUMP_IF_FALSE", 1, chunk, offset);
case OP_LOOP:
return jumpInstruction("OP_LOOP", -1, chunk, offset);
case OP_CALL:
return byteInstruction("OP_CALL", chunk, offset);
case OP_RETURN:
return simpleInstruction("OP_RETURN", offset);
default:
printf("Unknown opcode %d\n", instruction);
return offset + 1;
}
}
|
