public IInstruction ReadInstruction(uint inst)
{
if (!Enum.IsDefined(typeof(Opcode), inst >> 26))
{
return(UndefinedInstruction.FromInteger(inst));
}
var opcode = (Opcode)(inst >> 26);
switch (opcode)
{
case Opcode.RType:
var rIns = RTypeInstruction.FromInteger(inst);
rIns.Executor = RTypeExecutors[rIns.Function];
return(rIns);
case Opcode.Jump:
case Opcode.JumpAndLink:
var jIns = JTypeInstruction.FromInteger(inst);
jIns.Executor = JTypeExecutors[jIns.JumpType];
return(jIns);
case Opcode.CoProcessor:
var coIns = CoProcessorInstruction.FromInteger(inst);
coIns.Executor = CoProcessorExecutors[coIns.Format];
return(coIns);
default:
var iIns = ITypeInstruction.FromInteger(inst);
iIns.Executor = ITypeExecutors[iIns.Opcode];
return(iIns);
}
}
public static JTypeInstruction FromInteger(uint b)
{
var jt = new JTypeInstruction()
{
JumpType = (JumpType)(b >> 26),
Target = b & 0x3FFFFFF
};
return jt;
}
public static JTypeInstruction FromInteger(uint b)
{
var jt = new JTypeInstruction()
{
JumpType = (JumpType)(b >> 26),
Target = b & 0x3FFFFFF
};
return(jt);
}