On Wednesday, February 05, 2003 10:11 AM [GMT+1=CET], Matthias Troyer <[EMAIL PROTECTED]> wrote:
> I am looking into it but already have a conjecture. When using signed > 64 bit integers the Cray compiler (with optimization turned on) uses > the floating point units to actually perform the operations in 46 bit > arithmetic. This speeds up things but causes compatibility problems. In > the case of the jam sources we could avoid this "optimization" by using > unsigned types. Is it possible to use an unsigned integer here to avoid > similar problems? Just to be clear, we didn't avoid an optimization by using unsigned types. We avoided undefined behavior due to overflow in signed integers, or conversions from unsigned->signed. -- Dave Abrahams Boost Consulting http://www.boost-consulting.com _______________________________________________ Unsubscribe & other changes: http://lists.boost.org/mailman/listinfo.cgi/boost
