From: James Edward Gray II <james@...>
Date: 2006-11-15T05:40:28+09:00
Subject: Re: Is 2.0 Integer or Float?

On Nov 14, 2006, at 2:29 PM, Joel VanderWerf wrote:

> James Edward Gray II wrote:
>> On Nov 14, 2006, at 2:21 PM, Wilson Bilkovich wrote:
>>> IEEE floating point can store an exact representation of any integer
>>> that the fp number is large enough to contain.
>>> I've never used it this way, but supposedly that is used to handle
>>> 53-bit ints on platforms that have 64-bit floats and only 32-bit  
>>> ints.
>>>
>>> That may or may not be what the OP is trying to do.
>> I'm pretty sure Lua uses floats for everything, for exactly this  
>> reason.
>
> How does that work? Is there an 11-bit pattern that signifies "use  
> the remaining 53 bits as a integer"? Do math library functions  
> respect this?

I have no idea how they do what they do:

http://lua-users.org/wiki/FloatingPoint

James Edward Gray II