blob: 05aafc1dfa6926bb2704816c8746da116b030ea8 (
plain)
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
|
#include <x86.h>
#include <backend.h>
#define REG_SAFETY(reg) \
do { \
if(reg > 15) DIE("Compiler error! Register %d is invalid!" \
, reg); \
} while(0)
// TODO: Consider implementing a modrm backend that is rex-aware.
//void x86_calc_modrm(uint16_t reg, uint16_t mod)
void x86_mov_r_i64(uint8_t reg, uint64_t value)
{
REG_SAFETY(reg);
emit8(REXW);
emit8(0xB8 + reg);
emit64(value);
}
void x86_mov_rm_i64(uint8_t mode, uint16_t reg)
{
DIE("TODO");
}
void x86_push_i32(uint32_t value)
{
emit8(0x68);
emit32(value);
}
/*
* @todo
*/
void x86_push_i16(uint16_t value)
{
DIE("NOT IMPLEMENTED");
// 66h
// PUSH 68
// IMM value
}
void x86_push_i8(uint8_t value)
{
emit8(0x6A);
emit8(value);
}
void x86_push_r64(uint8_t reg)
{
REG_SAFETY(reg);
emit8(0x50 + reg);
}
void x86_push_rm64(uint8_t mode, uint8_t r, uint64_t m)
{
REG_SAFETY(r);
if(r > 7) {
emit8(REXWR);
} else if (r < 7) {
emit8(REXW);
}
emit8(0xFF);
// Calculate MODRM
// emit MODRM byte
// if mode = 1:
// disp
// done
}
|
