ID: 41328 Updated by: [EMAIL PROTECTED] Reported By: rgonzalez at gnt dot cc -Status: Open +Status: Feedback Bug Type: *Math Functions Operating System: Linux Slackware 10.2 PHP Version: 5.2.2 New Comment:
Try newer GCC first. Previous Comments: ------------------------------------------------------------------------ [2007-05-08 17:26:11] rgonzalez at gnt dot cc Description: ------------ I compiled PHP 5.2.2 with CFLAGS="-O2 -march=pentium4 -mcpu=pentium4", as usual (I've done so with all the 5.x.x series, and the proc is a Pentium 4, of course) and a customer complained about weird results in one of his scripts. I isolated the problem to be related to the floor function. The problem was that it returned weird results. Sample script: <?php $nt = 100; $promrow2['uni_gifts'] = 1; $promrow2['unidades'] = 10; $calc_cnt=floor(($nt*$promrow2['uni_gifts'])/$promrow2['unidades']); print $calc_cnt; ?> printed :.0000000001 I needed to cast (int)floor to get the right result. I recompiled with CFLAGS="-O2 -march=i686 -mcpu=i686" and the problem was solved. I've compiled 5.2.2 with nocona optimizations without problems in other machines. Software: PHP 5.2.2 GCC 3.2.2 Reproduce code: --------------- <?php $nt = 100; $promrow2['uni_gifts'] = 1; $promrow2['unidades'] = 10; $calc_cnt=floor(($nt*$promrow2['uni_gifts'])/$promrow2['unidades']); print $calc_cnt; ?> Expected result: ---------------- 10 Actual result: -------------- :.0000000001 ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=41328&edit=1
