From: khan@xraylith.wisc.edu (Mumit Khan) Subject: Re: cygwin-b20 gcc: "A - floor(A)" returns a negative value 10 Nov 1998 06:58:12 -0800 Message-ID: References: <000001be0b8a$16397810$f445ce84@ECE.McGill.CA> Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII To: Peter Kabal Cc: gnu-win32@cygnus.com On Sun, 8 Nov 1998, Peter Kabal wrote: > Switching from cygwin-b19 to cygwin-b20 caused a C-routine to give > incorrect results. This was traced to a calculation (in double) of > "A - float(A)" which returns a negative value. By definition it should > always be positive. A short test program which demonstrates this > problem is included. If the program is further simplified, the problem > goes away. To exercise the bug, the program must be compiled with > optimization level -O3. Thanks for the report and the testcast! I've reported this bug to egcs-bugs list. fyi, this is a regression from 1.0.x releases and affects all x86 ports, not just cygwin/mingw. Regards, Mumit - For help on using this list (especially unsubscribing), send a message to "gnu-win32-request@cygnus.com" with one line of text: "help".