Does the element on stack has the same size?

[Paul Hohensee]

double and long values take up two stack slots in the regular 
interpreter and 4
in the tagged stack interpreter.

paul

Colin(Du Li) wrote:
> Hello,
>
> I have a question about hotspot operand stack.
> I find following codes in abstractinterpreter.hpp
>   static int stackElementWords()   { return TaggedStackInterpreter ? 2 : 1;
> }
>
> Does that mean the size of any element on stack is either 1 or 2 words,
> right?
> If so, how the stack can store double type parameters?
> e.g.
> for method:   M(double d){}
> How can parameter 'd' can be pushed into operand stack before the method 'M'
> is executed? 
> Thanks a lot!
>
> Du LI
>