keywords: signal, signals, SIGFPE, floating point numbers, inf, nan keywords: divide-by-zero, round-off error
Pete, Your test program works if you do an integer division, but not for floating point division. I think I read on one of Jeff's links that SIGFPE isn't just for floating point numbers, so perhaps division by zero is caught only for integer division on x86. I'm not sure what kind of errors your program would have if it's not generating "inf" or "nan". If you're getting calculations errors, I think you're getting floating point round-off errors, rather than overflow/underflow. If that's the case, you'd need a higher precision numbers (double, long double, or the arbitrary-precision numbers library...) One more thing - If you have a really big number plus a really small number, the smaller number gets thrown out. In that case, you'll need a really high precision number type that can span across the big and the small number to avoid the round-off error. If you have this type of problem, and if you can't use the high-enough precision number type (either because you don't have one available or it's too slow), there's no way around it except rewriting the code. -Mark -- Mark K. Kim http://www.cbreak.org/ PGP key available upon request. _______________________________________________ vox-tech mailing list [EMAIL PROTECTED] http://lists.lugod.org/mailman/listinfo/vox-tech
