Re: Questions about PDD 4: Internal data types

[Dan Sugalski]

At 12:21 PM 3/2/2001 -0800, Hong Zhang wrote:

>I believe we should use low bits for tagging. It will make switch
>case much faster.

That's pretty much what I intended. The only reason not to have them as the 
low bits is if there's some other field that uses multiple bits, and 
optimizing for that field buys us more of a win than the type. Single bit 
fields can go anywhere, since I don't think it really matters which bit 
gets used there.

                                        Dan

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