blob: a40dd51dc75f8947c644b1727d019279f6ec893b (
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
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
#pragma once
#include <vector>
#include <string>
class Simulation;
namespace pim
{
union Word
{
int Integer;
float Decimal;
Word(int integer) : Integer(integer) {}
Word(float decimal) : Decimal(decimal) {}
Word() {}
};
struct Instruction
{
int Opcode;
Word Parameter;
};
class VirtualMachine
{
#define WORDSIZE 4
//#define OPDEF(name) void op##name(int parameter);
//#include "Opcodes.inl"
//#undef OPDEF
Simulation * sim;
Instruction * rom;
int romSize;
int romMask;
unsigned char * ram;
int ramSize;
int ramMask;
#define CSA(argument) (*((Word*)&ram[framePointer-argument]))
#define CS() (*((Word*)&ram[callStack]))
#define PS() (*((Word*)&ram[programStack]))
#define PPROP(index, property) (*((Word*)(&sim->parts[(index)]+property)))
int programStack; //Points to the item on top of the Program Stack
int callStack; //Points to the item on top of the call stack
int framePointer; //Points to the bottom (first item) on the current frame of the call stack
//Instruction * instructions;
int programCounter;
public:
VirtualMachine(Simulation * sim);
int OpcodeArgSize(int opcode);
void LoadProgram(std::vector<unsigned char> programData);
void Run();
void Call(std::string entryPoint);
void Call(int entryPoint);
inline void PSPush(Word word)
{
programStack -= WORDSIZE;
PS() = word;
}
inline Word PSPop()
{
Word word = PS();
programStack += WORDSIZE;
return word;
}
inline void CSPush(Word word)
{
callStack -= WORDSIZE;
CS() = word;
}
inline Word CSPop()
{
Word word = CS();
callStack += WORDSIZE;
return word;
}
};
}
|
