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Posted by Andy Hassall on 01/19/06 00:45
On 18 Jan 2006 13:32:23 -0800, "DigDug" <dougitman@hotmail.com> wrote:
>I get two different results in doing a Xor on a large signed double
>between linux servers.
>working system is kernel 2.4 . bad results server is kernel 2.6.
>
> PHP version does not matter. I compile PHP from 4.2.2 to latest.
>
>test code:
><?PHP echo -4738698913 ^ 43814; ?>
>
>results:
>
>Good result from 2.4 kernel system is -443704711
>Bad result from 2.6 kernel systems(tried 5 different systems) is
>-2147439834
>
>BUG in PHP or kernel?
32 or 64 bit architecture?
Have you seen the related user notes on
http://www.php.net/manual/en/language.operators.bitwise.php ? (Not all apply to
XOR but there are several in there that may interest you).
--
Andy Hassall :: andy@andyh.co.uk :: http://www.andyh.co.uk
http://www.andyhsoftware.co.uk/space :: disk and FTP usage analysis tool
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