#20542 [NoF->Csd]: 0+0=4G on aix4.3 (64bits)

ID: 20542 User updated by: rvl@interchain.nl Reported By: rvl@interchain.nl -Status: No Feedback +Status: Closed Bug Type: Math related Operating System: aix 4.3.3.0 PHP Version: 4.2.3 New Comment: Seems a gcc bug. Now PHP compiled with the native AIX C compiler (and apache still compiled with gcc) and it works. Previous Comments: ------------------------------------------------------------------------ [2002-12-13 01:00:01] php-bugs@lists.php.net No feedback was provided for this bug for over 2 weeks, so it is being suspended automatically. If you are able to provide the information that was originally requested, please do so and change the status of the bug back to "Open". ------------------------------------------------------------------------ [2002-11-27 18:54:59] iliaa@php.net Could this be an issue with the C library used on AIX? On a 64 bit platform (64sparc) I cannot replicate the problem using PHP 4.2.3. ------------------------------------------------------------------------ [2002-11-22 02:47:23] rvl@interchain.nl I am sorry but on this specific platform <?php echo (0+0); ?> does result in 4294967294, really! And <?php $x = 0; $x = $x + 0; echo $x; ?> as well. ------------------------------------------------------------------------ [2002-11-21 17:25:14] iliaa@php.net Sorry, but your problem does not imply a bug in PHP itself. For a list of more appropriate places to ask for help using PHP, please visit http://www.php.net/support.php as this bug system is not the appropriate forum for asking support questions. Thank you for your interest in PHP. string cancatination is done using . not , in PHP. <?php echo '0+0=' . (0+0) . "\n"; ?> Results in 0 on any platform. ------------------------------------------------------------------------ [2002-11-21 05:45:55] rvl@interchain.nl Script: <? echo '0+0=', 0+0, "\n"; ?> Output of script on php 4.2.3: 0+0=4294967294 which is equal to 2^32-2 (Output of script on php 4.1.2 and 4.0.6: 0+0=4294967296 which is equal to 2^32). In general, all simple additions and multiplications produce huge numbers: 0+0=4294967294 0+1=4294967295 1+0=4294967295 1+1=4294967296 0-0=0 0-1=-1 1-0=1 1-1=0 0*0=3.5178585246345E+18 0*1=3.5178585265101E+18 1*0=3.5178585265101E+18 1*1=3.5178585283857E+18 0/1=0 1/1=1 2/1=2 2/2=1 Installation issues # gcc -v Reading specs from /usr/local/lib/gcc-lib/rs6000-ibm-aix4.3.3.0/2.95.3/specs gcc version 2.95.3 20010315 (release) # make -v GNU Make version 3.79.1, by Richard Stallman and Roland McGrath. Built for rs6000-ibm-aix4.3.3.0 # tar -xf apache_1.3.20.tar # cd apache_1.3.20 # ./configure --enable-module=most # cd .. # tar -xf php-4.2.3.tar # cd php-4.2.3 # ./configure --without-mysql --with-apache=../apache_1.3.20 --enable-static --with-iodbc=/usr/local --enable-track-vars # make # make install # cd .. # cd apache_1.3.20 # configure --enable-module=most --activate-module=src/modules/php4/libphp4.a # make # make install I don't know if it is very relevant but the rs6000 on which aix4.3 is running is a 64bits machine. The c program int main() { printf("long=%dbits\n",8*sizeof(long)); return 0; } outputs 'long=64bits' when compiled with 'cc -q64', while when compiled with 'gcc' it outputs 'long=32bits'. Thanks very much in advance, Rein van Vliet ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=20542&edit=1