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
156
157
158
159
160
|
#ifndef SRC_ASM_HPP_
#define SRC_ASM_HPP_
#include <cstdint>
#define VERIFY_SIZE(X) static_assert(sizeof(X) == sizeof(uint32_t), "Size Does Not Match.")
enum class type_t { R, I, S, U, B, J, I_SHIFT };
struct r_type {
uint32_t funct7 : 7;
uint32_t rs2 : 5;
uint32_t rs1 : 5;
uint32_t funct3 : 3;
uint32_t rd : 5;
uint32_t opcode : 7;
r_type(uint32_t funct7, uint32_t rs2, uint32_t rs1, uint32_t funct3, uint32_t rd, uint32_t opcode) :
funct7(funct7 & 7),
rs2(rs2 & 5),
rs1(rs1 & 5),
funct3(funct3 & 3),
rd(rd & 5),
opcode(opcode & 7) {}
};
struct i_type {
uint32_t imm : 12;
uint32_t rs1 : 5;
uint32_t funct3 : 3;
uint32_t rd : 5;
uint32_t opcode : 7;
i_type(uint32_t imm, uint32_t rs1, uint32_t funct3, uint32_t rd, uint32_t opcode) :
imm(imm & 12),
rs1(rs1 & 5),
funct3(funct3 & 3),
rd(rd & 5),
opcode(opcode & 7) {}
};
struct i_shift_type {
uint32_t shtyp : 6;
uint32_t shmat : 6;
uint32_t rs1 : 5;
uint32_t funct3 : 3;
uint32_t rd : 5;
uint32_t opcode : 7;
i_shift_type(uint32_t shtyp, uint32_t shmat, uint32_t rs1, uint32_t funct3, uint32_t rd, uint32_t opcode) :
shtyp(shtyp & 6),
shmat(shmat & 6),
rs1(rs1 & 5),
funct3(funct3 & 3),
rd(rd & 5),
opcode(opcode & 7) {}
};
struct s_type {
uint32_t imm_hi : 7;
uint32_t rs2 : 5;
uint32_t rs1 : 5;
uint32_t funct3 : 3;
uint32_t imm_lo : 5;
uint32_t opcode : 7;
s_type(uint32_t imm_hi, uint32_t rs2, uint32_t rs1, uint32_t funct3, uint32_t imm_lo, uint32_t opcode) :
imm_hi(imm_hi & 7),
rs2(rs2 & 5),
rs1(rs1 & 5),
funct3(funct3 & 3),
imm_lo(imm_lo & 5),
opcode(opcode & 7) {}
};
struct u_type {
uint32_t imm : 10;
uint32_t rd : 5;
uint32_t opcode : 7;
u_type(uint32_t imm, uint32_t rd, uint32_t opcode) : imm(imm & 10), rd(rd & 5), opcode(opcode & 7) {}
};
struct b_type {
uint32_t a : 1;
uint32_t imm_hi : 6;
uint32_t rs2 : 5;
uint32_t rs1 : 5;
uint32_t funct3 : 3;
uint32_t imm_lo : 4;
uint32_t b : 1;
uint32_t opcode : 7;
b_type(uint32_t a,
uint32_t imm_hi,
uint32_t rs2,
uint32_t rs1,
uint32_t funct3,
uint32_t imm_lo,
uint32_t b,
uint32_t opcode) :
a(a & 1),
imm_hi(imm_hi & 6),
rs2(rs2 & 5),
rs1(rs1 & 5),
funct3(funct3 & 3),
imm_lo(imm_lo & 4),
b(b & 1),
opcode(opcode & 7) {}
};
struct j_type {
uint32_t a : 1;
uint32_t imm_lo : 10;
uint32_t b : 1;
uint32_t imm_hi : 8;
uint32_t rd : 5;
uint32_t opcode : 7;
j_type(uint32_t a, uint32_t imm_lo, uint32_t b, uint32_t imm_hi, uint32_t rd, uint32_t opcode) :
a(a & 1),
imm_lo(imm_lo & 10),
b(b & 1),
imm_hi(imm_hi & 8),
rd(rd & 5),
opcode(opcode & 7) {}
};
VERIFY_SIZE(r_type);
VERIFY_SIZE(i_type);
VERIFY_SIZE(i_shift_type);
VERIFY_SIZE(s_type);
VERIFY_SIZE(u_type);
VERIFY_SIZE(b_type);
VERIFY_SIZE(j_type);
struct instruction_t {
type_t type;
union {
r_type r;
i_type i;
i_shift_type is;
s_type s;
u_type u;
b_type b;
j_type j;
uint32_t value;
};
explicit instruction_t(const r_type r) : type(type_t::R), r(r) {}
explicit instruction_t(const i_type i) : type(type_t::I), i(i) {}
explicit instruction_t(const i_shift_type is) : type(type_t::I_SHIFT), is(is) {}
explicit instruction_t(const s_type s) : type(type_t::S), s(s) {}
explicit instruction_t(const u_type u) : type(type_t::U), u(u) {}
explicit instruction_t(const b_type b) : type(type_t::B), b(b) {}
explicit instruction_t(const j_type j) : type(type_t::J), j(j) {}
};
#endif // SRC_ASM_HPP_
|
