-
Notifications
You must be signed in to change notification settings - Fork 0
/
asmtocom.cpp
188 lines (169 loc) · 6.77 KB
/
asmtocom.cpp
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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
#include <iostream>
#include <string>
#include <vector>
#include <fstream>
using namespace std;
struct Register //Структура регистра
{
string name; //Имя регистра
string code; //Двоичный код регистра
string w; //w = 0 - 8 битный регистр, w = 1 - 16 битный регистр
};
Register arrayOfReg[16] =
{
{"ax", "000", "1"}, {"cx", "001", "1"}, {"dx", "010", "1"}, {"bx", "011", "1"}, {"sp", "100", "1"},{"bp", "101", "1"}, {"si", "110", "1"}, {"di", "111", "1"},
{"al", "000", "0"}, {"cl", "001", "0"}, {"dl", "010", "0"}, {"bl", "011", "0"}, {"ah", "100", "0"}, {"ch", "101", "0"}, {"dh", "110", "0"},{"bh", "111", "0"},
};
struct CodeFormat //Структура команды
{
string name; //Имя команды
string KOP; //Двоичный код операции команды
};
CodeFormat arrayOfCommands[5]
{
{"je", "01110100"}, //74
{"jne", "01110101"}, //75
{"cmp", "001110"}, //rr8 38 rr16 39 //rrm8 3A rrm16 3B
{"sub", "001010"}, //rr8 28 rr16 29 //rrm8 2A rrm16 2B
};
struct InderectAdressing
{
string name;
string code;
};
InderectAdressing arrayOfIA[5]
{
{"[bx+si]","000"}, {"[bx+di]","001"}, {"[si]","100"}, {"[di]","101"}, {"[bx]","111"},
};
string ConvertDigit(string str, int fromD, int toN) //Преобразует число из системы счисления fromD к системе счисления toN
{
//Преобразуем число из fromD системы считсления к 10-ой системе счисления
int digit = 0;
string output = "";
if (fromD == 10) digit = stoi(str);
else
{
for (int i = str.length() - 1; i >= 0; i--)
{
if (isdigit(str[i])) digit += (str[i] - '0') * pow(fromD, (str.length() - 1 - i));
else
{
string temp = "1";
temp.push_back(str[i] - 17);
digit += stoi(temp) * pow(fromD, (str.length() - 1 - i));
}
}
}
if (toN == 10) return to_string(digit);
//Переводим число из 10-ной системы счисления к toN-ой системе счисления
while (digit)
{
if (digit % toN >= 10) output.push_back((char)((digit % toN) + 55));
else output.push_back((char)((digit % toN) + 48));
digit /= toN;
}
reverse(output.begin(), output.end());
return output;
}
CodeFormat FindCommandByName(string nameOfCommand)
{
for (int i = 0; i < 5; i++)
if (arrayOfCommands[i].name == nameOfCommand) return arrayOfCommands[i];
return CodeFormat{ "","" };
}
Register FindRegisterByName(string nameOfRegister)
{
for (int i = 0; i < 16; i++)
if (arrayOfReg[i].name == nameOfRegister) return arrayOfReg[i];
return Register{ "","", "" };
}
InderectAdressing FindIAByName(string nameOfIA)
{
for (int i = 0; i < 5; i++)
if (arrayOfIA[i].name == nameOfIA) return arrayOfIA[i];
return InderectAdressing{ "","" };
}
int main()
{
vector<vector<string>> lines; //Сюда будем записывать строки входного файла
string line;
ifstream in("hello.asm");
if (in.is_open())
{
while (getline(in, line))
if (line != "")
{
vector<string> buffer;
string temp = "";
for (int i = 0; i <= line.size(); i++)
{
if (line[i] != ' ' && line[i] != '\0' && line[i] != '\t' && line[i] != ',') temp += line[i]; //считываем слово
else if (temp != "")
{
buffer.push_back(temp);
temp = "";
}
}
lines.push_back(buffer);
}
}
in.close();
int shift = 0;
vector<int> displacement;
for (int i = 0; i < lines.size(); i++)
{
displacement.push_back(shift);
for (int j = 0; j < lines[i].size(); j++)
if (lines[i][j] == "je" || lines[i][j] == "jne" || lines[i][j] == "sub" || lines[i][j] == "cmp")
shift += 2;
}
vector<int> machineCode;
for (int i = 0; i < lines.size(); i++)
{
for (int j = 0; j < lines[i].size(); j++)
{
if (lines[i][j] == "je" || lines[i][j] == "jne")
{
//1)
machineCode.push_back(stoi(ConvertDigit(FindCommandByName(lines[i][j]).KOP, 2, 10)));
//2)
int displacementOfLabel = 0;
for (int k = 0; k < lines.size(); k++)
if (lines[k][0].substr(0, lines[k][0].size() - 1) == lines[i][j + 1])
displacementOfLabel = displacement[k];
if (displacementOfLabel > displacement[i])
machineCode.push_back(displacementOfLabel - displacement[i] - 2);
else
machineCode.push_back(stoi(ConvertDigit("FE", 16, 10)) - (displacement[i] - displacementOfLabel));
}
else if (lines[i][j] == "sub" || lines[i][j] == "cmp")
{
if (lines[i][j + 2] == "[bx]" || lines[i][j + 2] == "[si]" || lines[i][j + 2] == "[di]" || lines[i][j + 2] == "[bx+si]" || lines[i][j + 2] == "[bx+di]")
{
CodeFormat foundCode = FindCommandByName(lines[i][j]); //r,m
Register foundRegister = FindRegisterByName(lines[i][j + 1]);
InderectAdressing foundIA = FindIAByName(lines[i][j + 2]);
machineCode.push_back(stoi(ConvertDigit(foundCode.KOP +"1"+ foundRegister.w, 2, 10)));
machineCode.push_back(stoi(ConvertDigit("00" + foundRegister.code + foundIA.code, 2, 10)));
}
else
{
CodeFormat foundCode = FindCommandByName(lines[i][j]); //r,r
Register foundRegisterD = FindRegisterByName(lines[i][j + 1]);
Register foundRegisterS = FindRegisterByName(lines[i][j + 2]);
machineCode.push_back(stoi(ConvertDigit(foundCode.KOP +"0"+ foundRegisterD.w, 2, 10)));
machineCode.push_back(stoi(ConvertDigit("11" + foundRegisterS.code + foundRegisterD.code, 2, 10)));
}
}
}
}
ofstream fs("output.bin", ios::out | ios::binary);
if (!fs)
{
cout << "Cannot open file!" << endl;
return 1;
}
for (int i = 0; i < machineCode.size(); i++)
fs.write((char*)&machineCode[i], sizeof(char));
return 1;
}