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Message-Id: <4354761.jpclmRYlUZ@linux1.krischik.com>
From: Martin Krischik <martin@krischik.com>
Subject: Re: Bit manipulation
Newsgroups: comp.lang.ada
Reply-To: martin@krischik.com
Date: Mon, 07 Feb 2005 19:04:09 +0100
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Date: 2005-02-07T19:04:09+01:00
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Martin Dowie wrote:

> Maurizio wrote:
>> hi, i need two hint:
>>
>> i need to acces to a 32 bit word (Interfaces.Unsigned_32).
>> how i can do to take the three m.s.bit? (30,31,32)
> 
> As you would in 'C' - mask them, e.g.
> 
>    use type Interfaces.Unsigned_32;
> 
>    function Get_3_msb (I : Interfaces.Unsigned_32)
>       return Interfaces.Unsigned_32 is
>    begin
>       return I and 16#E000_0000#;  -- top 3 bits only
>    end Get_3_msb;

>From the question it sounds like he need the bits as three Booleans. Of
corse a simple compare with 0 will help here.

Martin

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