201670 2009-07-27 16:51:07 +0000 Result of conversion of double to long long differs in valgrind and non-valgrind runs 2009-07-28 11:41:00 +0000 1 1 6 Developer tools valgrind general unspecified Ubuntu Linux RESOLVED DUPLICATE 197915 NOR normal --- 0 rudolf.hornig jseward njn tom 0 oldest_to_newest 799540 0 rudolf.hornig 2009-07-27 16:51:07 +0000 Version: valgrind-3.4.1-Debian (using KDE 4.2.4) Compiler: gcc 4.3 OS: Linux Installed from: Ubuntu Packages uname -a Linux hal90000 2.6.28-13-generic #45-Ubuntu SMP Tue Jun 30 19:49:51 UTC 2009 i686 GNU/Linux The output of the followinfg program differs it it is run under valgrind: #include <stdio.h> int main() { char *x = "\x19\x6d\xb2\x9a\xba\x7e\x15\x40"; double d = *(double *)x; printf("\nlong long:%lld \n", (long long)(d*(1e12))); } The output without valgrind: long long:5373758713855 using valgrind: long long:5373758713856 799703 1 njn 2009-07-28 00:24:12 +0000 This is probably a dup of bug 197915. Rudolf, what do you think? 799867 2 rudolf.hornig 2009-07-28 11:34:28 +0000 Confirmed. After some research, I have recompiled the code with -msse2 -mfpmath=sse options (forcing to use 64bit floats on an intel CPU). and the valgrind and non-valgind output is now the same. Sorry for the confusion. This is really a dauplicate. 799871 3 tom 2009-07-28 11:41:00 +0000 *** This bug has been marked as a duplicate of bug 197915 ***