public IEnumerable <InstructionInfo> Expand()
{
if (this.ModRmByte != ModRmInfo.RegisterPlus)
{
yield return(this);
yield break;
}
for (int r = 0; r < 8; r++)
{
var subInst = this;
subInst.ModRmByte = ModRmInfo.None;
if (!subInst.IsMultiByte)
{
subInst.Opcode += (ushort)r;
}
else
{
subInst.Opcode += (ushort)(r << 8);
}
int codes = this.Operands.PackedCode & ~(0xFF << (this.RPlusIndex * 8));
codes |= (int)GetRegisterIndex(r, this.Operands[this.RPlusIndex]) << (this.RPlusIndex * 8);
if (!operandFormats.TryGetValue(codes, out var operands))
{
operands = new OperandFormat(codes);
operandFormats.Add(codes, operands);
}
subInst.Operands = operands;
yield return(subInst);
}
}
public static InstructionInfo Parse(string instructionFormat)
{
var info = new InstructionInfo();
var outer = instructionFormat.Split(new char[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
string[] innerCode;
if (!outer[0].Contains('+'))
{
innerCode = outer[0].Split(new char[] { '/' }, StringSplitOptions.RemoveEmptyEntries);
}
else
{
innerCode = new string[2] {
outer[0].TrimEnd('+'), "+"
}
};
info.Opcode = ushort.Parse(innerCode[0], System.Globalization.NumberStyles.HexNumber);
if (info.Opcode > 0xFF)
{
info.Opcode = (ushort)(((info.Opcode & 0xFF) << 8) | ((info.Opcode >> 8) & 0xFF));
info.IsMultiByte = true;
}
if (innerCode.Length > 1)
{
if (innerCode[1][0] == 'r')
{
info.ModRmByte = ModRmInfo.All;
}
else if (innerCode[1][0] == '+')
{
info.ModRmByte = ModRmInfo.RegisterPlus;
}
else
{
info.ModRmByte = ModRmInfo.OnlyRm;
info.ExtendedRmOpcode = byte.Parse(new string(innerCode[1][0], 1));
}
}
if (outer.Length > 1)
{
string[] innerOperands = outer[1].Split(new char[] { ',' }, StringSplitOptions.RemoveEmptyEntries);
int operandCode = 0;
operandCode = (int)ParseOperand(innerOperands[0]);
if (innerOperands.Length > 1)
{
operandCode |= (int)ParseOperand(innerOperands[1]) << 8;
if (innerOperands.Length > 2)
{
operandCode |= (int)ParseOperand(innerOperands[2]) << 16;
}
}
if (!operandFormats.TryGetValue(operandCode, out var format))
{
format = new OperandFormat(operandCode);
operandFormats.Add(operandCode, format);
}
info.Operands = format;
}
else
{
if (!operandFormats.TryGetValue(0, out var format))
{
format = new OperandFormat(0);
operandFormats.Add(0, format);
}
info.Operands = format;
}
return(info);
}
