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;
}
}
static InstructionDefinition()
{
InstructionDefinition.mnemonics = new Dictionary <string, InstructionDefinition>();
InstructionDefinition.instructions = new InstructionDefinition[256];
InstructionDefinition.Add("HLT", 0);
InstructionDefinition.Add("NOP", 1);
InstructionDefinition.Add("INT", 2, ParameterDirection.Read, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("EINT", 3);
InstructionDefinition.Add("INTE", 4);
InstructionDefinition.Add("INTD", 5);
InstructionDefinition.Add("XCHG", 6, ParameterDirection.Write | ParameterDirection.Read, ParameterDirection.Write | ParameterDirection.Read);
InstructionDefinition.Add("CAS", 7, ParameterDirection.Write | ParameterDirection.Read, ParameterDirection.Write | ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("SET", 8, ParameterDirection.Write, ParameterDirection.Read);
InstructionDefinition.Add("CPY", 9, ParameterDirection.Read, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("CALL", 10, ParameterDirection.Read);
InstructionDefinition.Add("RET", 11);
InstructionDefinition.Add("ADD", 20, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("ADDF", 21, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("SUB", 22, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("SUBF", 23, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("DIV", 24, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("DIVF", 25, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("MUL", 26, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("MULF", 27, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("MOD", 28, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("MODF", 29, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("ITOF", 30, ParameterDirection.Write, ParameterDirection.Read);
InstructionDefinition.Add("FTOI", 31, ParameterDirection.Write, ParameterDirection.Read);
InstructionDefinition.Add("SR", 40, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("SL", 41, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("RR", 42, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("RL", 43, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("NAND", 44, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("AND", 45, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("NOR", 46, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("OR", 47, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("NXOR", 48, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("XOR", 49, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("NOT", 50, ParameterDirection.Write, ParameterDirection.Read);
InstructionDefinition.Add("GT", 51, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("GTE", 52, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("LT", 53, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("LTE", 54, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("EQ", 55, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("NEQ", 56, ParameterDirection.Write, ParameterDirection.Read, ParameterDirection.Read);
InstructionDefinition.Add("DBG", 60, ParameterDirection.Write | ParameterDirection.Read, ParameterDirection.Write | ParameterDirection.Read, ParameterDirection.Write | ParameterDirection.Read);
InstructionDefinition.Add("BRK", 61);
}
private static void Add(string mnemonic, byte code, ParameterDirection parameter1Direction, ParameterDirection parameter2Direction, ParameterDirection parameter3Direction) => InstructionDefinition.Add(new InstructionDefinition(mnemonic, code, parameter1Direction, parameter2Direction, parameter3Direction));
private static void Add(string mnemonic, byte code) => InstructionDefinition.Add(new InstructionDefinition(mnemonic, code));
private static void Add(InstructionDefinition def)
{
InstructionDefinition.mnemonics.Add(def.Mnemonic, def);
InstructionDefinition.instructions[def.Code] = def;
}