Petr Savicky <savicky@xxxxxxxxx> wrote: > > Can anybody help me to find the right place to discuss the problems > related to IEEE 754 standard for floating point numbers on x86 (IA-32)? Well, I could, but they wouldn't be terribly pleased. Your error is to assume that IEEE 754 applies to composite operations, whereas it actually applies to each basic one in turn. To see what is going on, you should print out the balues in binary, octal or hexadecimal, for each sub-operation. As far as I can see, gcc is doing nothing wrong. Regards, Nick Maclaren, University of Cambridge Computing Service, New Museums Site, Pembroke Street, Cambridge CB2 3QH, England. Email: nmm1@xxxxxxxxx Tel.: +44 1223 334761 Fax: +44 1223 334679