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From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: How to check a Float for NaN
Date: Wed, 7 May 2008 17:56:57 -0500
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Date: 2008-05-07T17:56:57-05:00
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"Adam Beneschan" <adam@irvine.com> wrote in message 
news:95c1de75-7aa0-4f00-bbc4-6f503a3c7aef@b9g2000prh.googlegroups.com...
...
>   type Ieee_Short_Real is
>      record
>         Mantissa_Sign : Mantissa_Sign_Type;
>         Exponent      : Exponent_Type;
>         Mantissa      : Mantissa_Type;
>      end record;
>
> (I've omitted the rep clause because I think the one above might work
> only for big-endian and not little-endian machines or vice versa, and
> I don't feel like figuring it out because I have a cold and my head
> hurts enough already.)

Sorry about the cold, but if you omit the rep. clause, all of these 
components are likely to take full bytes and that won't work at all.

IF you had given size clauses on all of the modular types AND a pragma Pack 
on the record, it MIGHT have worked. But given that you need a particular 
representation, omitting the rep. clause is irrational. (That said, getting 
it right on both big-endian and little-endian machines is enough to make my 
head explode. But it's rarely necessary, and certainly isn't in the OP's 
case.)

                                 Randy.