public override Reg CGenValue(CGenState state)
{
Reg ret = this.Expr.CGenValue(state);
switch (ret)
{
case Reg.EAX:
state.NEG(Reg.EAX);
return(Reg.EAX);
case Reg.ST0:
state.FCHS();
return(Reg.ST0);
default:
throw new InvalidProgramException();
}
}
public override Reg CGenValue(Env env, CGenState state)
{
Reg ret = expr.CGenValue(env, state);
switch (ret) {
case Reg.EAX:
state.NEG(Reg.EAX);
return Reg.EAX;
case Reg.ST0:
state.FCHS();
return Reg.ST0;
default:
throw new InvalidProgramException();
}
}