public override void Process(Assembler asm, ref string[] tokens)
{
// Get data
int i = 1;
string first = tokens[i++];
string value = tokens[i++];
// Check if value is number
int num;
bool valueIsNum = Util.ConvertStringToInt(value, out num);
// Check
if(Util.IsRegister32(first))
{
Register reg = Util.GetRegister32(first);
// MOV SOURCE, VALUE
if (valueIsNum)
{
asm.Write8((byte)(0xB8 + (int)reg));
asm.Write32(num);
}
// MOV SOURCE, REG
else if (Util.IsRegister32(value))
{
Register src = Util.GetRegister32(value);
asm.Write8(0x89);
asm.Write8(Util.EncodeMODRM(3, (int)src, (int)reg));
}
else
{
throw new Exception("Invalid source for MOV instruction '" + value + "'");
}
}
else if (Util.IsRegister16(first))
{
Register reg = Util.GetRegister16(first);
// MOV SOURCE, VALUE
if (valueIsNum)
{
asm.Write8(0x66);
asm.Write8((byte)(0xB8 + (int)reg));
asm.Write16((short) num);
}
// MOV SOURCE, REG
else if (Util.IsRegister16(value))
{
Register src = Util.GetRegister16(value);
asm.Write8(0x66);
asm.Write8(0x89);
asm.Write8(Util.EncodeMODRM(3, (int)src, (int)reg));
}
else
{
throw new Exception("Invalid source for MOV instruction '" + value + "'");
}
}
else if (Util.IsRegister8(first))
{
Register reg = Util.GetRegister8(first);
// MOV SOURCE, VALUE
if (valueIsNum)
{
asm.Write8((byte)(0xB0 + (int)reg));
asm.Write8((byte)num);
}
// MOV SOURCE, REG
else if (Util.IsRegister8(value))
{
Register src = Util.GetRegister8(value);
asm.Write8(0x88);
asm.Write8(Util.EncodeMODRM(3, (int)src, (int)reg));
}
else
{
throw new Exception("Invalid source for MOV instruction '" + value + "'");
}
}
else
{
throw new Exception("Invalid MOV operation on '" + first + "'");
}
}