/// <summary>
/// Decodes the specified instruction.
/// </summary>
/// <param name="ctx">The context.</param>
/// <param name="decoder">The instruction decoder, which holds the code stream.</param>
public override void Decode(Context ctx, IInstructionDecoder decoder)
{
base.Decode(ctx, decoder);
Token token = decoder.DecodeTokenType();
ITypeModule module = null;
Mosa.Runtime.TypeSystem.Generic.CilGenericType genericType = decoder.Method.DeclaringType as Mosa.Runtime.TypeSystem.Generic.CilGenericType;
if (genericType != null)
{
module = (decoder.Method.DeclaringType as Mosa.Runtime.TypeSystem.Generic.CilGenericType).BaseGenericType.Module;
}
else
{
module = decoder.Method.Module;
}
ctx.RuntimeField = module.GetField(token);
if (ctx.RuntimeField.ContainsGenericParameter)
{
;
}
SigType sigType = new RefSigType(ctx.RuntimeField.SignatureType);
ctx.Result = LoadInstruction.CreateResultOperand(decoder, Operand.StackTypeFromSigType(sigType), sigType);
}
/// <summary>
/// Validates the instruction operands and creates a matching variable for the result.
/// </summary>
/// <param name="ctx">The context.</param>
/// <param name="compiler">The compiler.</param>
public override void Validate(Context ctx, IMethodCompiler compiler)
{
base.Validate(ctx, compiler);
// If we're ldind.i8, fix an IL deficiency that the result may be U8
if (opcode == OpCode.Ldind_i8 && this.typeRef.Type == CilElementType.I8)
{
SigType opType = ctx.Operand1.Type;
RefSigType rst = opType as RefSigType;
PtrSigType ptr = opType as PtrSigType;
if (rst != null && rst.ElementType.Type == CilElementType.U8 ||
ptr != null && ptr.ElementType.Type == CilElementType.U8)
{
ctx.Result = compiler.CreateTemporary(BuiltInSigType.UInt64);
}
}
}
