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Posted by Pedro Graca on 01/19/06 01:17
DigDug wrote:
> I get two different results in doing a Xor on a large signed double
> between linux servers.
The ^ operator takes two integers, all bitwise operator do.
> 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; ?>
<?php if (PHP_VERSION>='4.4.0') echo PHP_INT_MAX; ?>
<?php echo var_dump(-4738698913); ?>
<?php echo -4738698913 | 0; ?>
<?php echo var_dump(-4738698913 | 0); ?>
> results:
>
> Good result from 2.4 kernel system is -443704711
64-bit machine?
> Bad result from 2.6 kernel systems(tried 5 different systems) is
> -2147439834
32-bit machine?
> BUG in PHP or kernel?
Neither, I think.
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