public override Reg CGenValue(CGenState state)
{
Reg ret = this.Expr.CGenValue(state);
switch (this.Kind)
{
case TypeCastType.DOUBLE_TO_FLOAT:
case TypeCastType.FLOAT_TO_DOUBLE:
case TypeCastType.PRESERVE_INT16:
case TypeCastType.PRESERVE_INT8:
case TypeCastType.NOP:
return(ret);
case TypeCastType.DOUBLE_TO_INT32:
case TypeCastType.FLOAT_TO_INT32:
state.CGenConvertFloatToLong();
return(Reg.EAX);
case TypeCastType.INT32_TO_DOUBLE:
case TypeCastType.INT32_TO_FLOAT:
state.CGenConvertLongToFloat();
return(Reg.ST0);
case TypeCastType.INT16_TO_INT32:
state.MOVSWL(Reg.AX, Reg.EAX);
return(ret);
case TypeCastType.INT8_TO_INT16:
case TypeCastType.INT8_TO_INT32:
state.MOVSBL(Reg.AL, Reg.EAX);
return(ret);
case TypeCastType.UINT16_TO_UINT32:
state.MOVZWL(Reg.AX, Reg.EAX);
return(ret);
case TypeCastType.UINT8_TO_UINT16:
case TypeCastType.UINT8_TO_UINT32:
state.MOVZBL(Reg.AL, Reg.EAX);
return(ret);
default:
throw new InvalidProgramException();
}
}
public override Reg CGenValue(Env env, CGenState state) {
Reg ret = this.expr.CGenValue(env, state);
switch (this.kind) {
case Kind.DOUBLE_TO_FLOAT:
case Kind.FLOAT_TO_DOUBLE:
case Kind.PRESERVE_INT16:
case Kind.PRESERVE_INT8:
case Kind.NOP:
return ret;
case Kind.DOUBLE_TO_INT32:
case Kind.FLOAT_TO_INT32:
state.CGenConvertFloatToLong();
return Reg.EAX;
case Kind.INT32_TO_DOUBLE:
case Kind.INT32_TO_FLOAT:
state.CGenConvertLongToFloat();
return Reg.ST0;
case Kind.INT16_TO_INT32:
state.MOVSWL(Reg.AX, Reg.EAX);
return ret;
case Kind.INT8_TO_INT16:
case Kind.INT8_TO_INT32:
state.MOVSBL(Reg.AL, Reg.EAX);
return ret;
case Kind.UINT16_TO_UINT32:
state.MOVZWL(Reg.AX, Reg.EAX);
return ret;
case Kind.UINT8_TO_UINT16:
case Kind.UINT8_TO_UINT32:
state.MOVZBL(Reg.AL, Reg.EAX);
return ret;
default:
throw new InvalidProgramException();
}
}