public Instruction(IWordStream stream, ulong address)
{
var bits = new BitStream(stream.ReadWord(address++));
this.Length = 1;
this.Code = bits.ReadU8(8);
this.Definition = InstructionDefinition.Find(this.Code);
if (this.Definition.ParameterCount > 0)
{
this.Parameter1 = this.DecodeParameter(stream, ref address, bits);
}
if (this.Definition.ParameterCount > 1)
{
this.Parameter2 = this.DecodeParameter(stream, ref address, bits);
}
if (this.Definition.ParameterCount > 2)
{
this.Parameter3 = this.DecodeParameter(stream, ref address, bits);
}
bits.Advance((3 - this.Definition.ParameterCount) * 8);
if (bits.ReadU1())
{
this.ConditionalZero = bits.ReadU1();
this.ConditionalParameter = this.DecodeParameter(stream, ref address, bits);
}
}
public Instruction(byte code, IList <Parameter> parameters, Parameter conditionalParameter, bool conditionalZero)
{
this.Code = code;
this.Length = (byte)(1 + (conditionalParameter?.Length ?? 0));
this.ConditionalParameter = conditionalParameter;
this.ConditionalZero = conditionalZero;
this.Definition = InstructionDefinition.Find(this.Code);
if (this.Definition.ParameterCount >= 1)
{
this.Parameter1 = parameters[0];
this.Length += this.Parameter1.Length;
}
if (this.Definition.ParameterCount >= 2)
{
this.Parameter2 = parameters[1];
this.Length += this.Parameter2.Length;
}
if (this.Definition.ParameterCount >= 3)
{
this.Parameter3 = parameters[2];
this.Length += this.Parameter3.Length;
}
}