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
|
/* Copyright (C) 2023 Aryadev Chavali
* You may distribute and modify this code under the terms of the
* GPLv2 license. You should have received a copy of the GPLv2
* license with this file. If not, please write to:
* aryadev@aryadevchavali.com.
* Created: 2023-10-15
* Author: Aryadev Chavali
* Description: Instructions and opcodes
*/
#ifndef INST_H
#define INST_H
#include <stdio.h>
#include <stdlib.h>
#include "./base.h"
#include "./darr.h"
typedef enum
{
OP_NOOP = 0,
// Dealing with data and registers
OP_PUSH_BYTE,
OP_PUSH_HWORD,
OP_PUSH_WORD,
OP_PUSH_REGISTER_BYTE,
OP_PUSH_REGISTER_HWORD,
OP_PUSH_REGISTER_WORD,
OP_POP_BYTE,
OP_POP_HWORD,
OP_POP_WORD,
OP_MOV_BYTE,
OP_MOV_HWORD,
OP_MOV_WORD,
OP_DUP_BYTE,
OP_DUP_HWORD,
OP_DUP_WORD,
// Boolean operations
OP_NOT_BYTE,
OP_NOT_HWORD,
OP_NOT_WORD,
OP_OR_BYTE,
OP_OR_HWORD,
OP_OR_WORD,
OP_AND_BYTE,
OP_AND_HWORD,
OP_AND_WORD,
OP_XOR_BYTE,
OP_XOR_HWORD,
OP_XOR_WORD,
OP_EQ_BYTE,
OP_EQ_HWORD,
OP_EQ_WORD,
OP_HALT = 0b11111111, // top of the byte is a HALT
} opcode_t;
const char *opcode_as_cstr(opcode_t);
#define OPCODE_IS_TYPE(OPCODE, OP_TYPE) \
(((OPCODE) >= OP_TYPE##_BYTE) && ((OPCODE) <= OP_TYPE##_WORD))
#define OPCODE_DATA_TYPE(OPCODE, OP_TYPE) \
((OPCODE) == OP_TYPE##_BYTE ? DATA_TYPE_BYTE \
: ((OPCODE) == OP_TYPE##_HWORD) ? DATA_TYPE_HWORD \
: DATA_TYPE_WORD)
typedef struct
{
opcode_t opcode;
data_t operand;
} inst_t;
void inst_print(inst_t, FILE *);
size_t inst_bytecode_size(inst_t);
void inst_write_bytecode(inst_t, darr_t *);
void insts_write_bytecode(inst_t *, size_t, darr_t *);
// Here the dynamic array is a preloaded buffer of bytes, where
// darr.available is the number of overall bytes and used is the
// cursor (where we are in the buffer).
inst_t inst_read_bytecode(darr_t *);
inst_t *insts_read_bytecode(darr_t *, size_t *);
void insts_write_bytecode_file(inst_t *, size_t, FILE *);
inst_t *insts_read_bytecode_file(FILE *, size_t *);
#define INST_NOOP ((inst_t){0})
#define INST_HALT ((inst_t){.opcode = OP_HALT})
#define INST_PUSH(TYPE, OP) \
((inst_t){.opcode = OP_PUSH_##TYPE, .operand = D##TYPE(OP)})
#define INST_MOV(TYPE, OP) \
((inst_t){.opcode = OP_MOV_##TYPE, .operand = D##TYPE(OP)})
#define INST_POP(TYPE) ((inst_t){.opcode = OP_POP_##TYPE})
#define INST_PUSH_REG(TYPE, REG) \
((inst_t){.opcode = OP_PUSH_REGISTER_##TYPE, .operand = D##TYPE(REG)})
#define INST_DUP(TYPE, OP) \
((inst_t){.opcode = OP_DUP_##TYPE, .operand = DWORD(OP)})
#define INST_NOT(TYPE) ((inst_t){.opcode = OP_NOT_##TYPE})
#define INST_OR(TYPE) ((inst_t){.opcode = OP_OR_##TYPE})
#define INST_AND(TYPE) ((inst_t){.opcode = OP_AND_##TYPE})
#define INST_XOR(TYPE) ((inst_t){.opcode = OP_XOR_##TYPE})
#define INST_EQ(TYPE) ((inst_t){.opcode = OP_EQ_##TYPE})
#endif
|
