On 03 Sep 2010, at 12:05, Markus Beth wrote: > Is there a reason why MM_MaskInvalidOp is not set in mxcsr in > rtl/x86_64/x86_64.inc?
Because on all FPC platforms, the default behaviour is that an invalid floating point operation causes an exception. > I have a 3rd party application that depends on InvalidOp to be masked > out. I want to extend this application with a FPC library. But the > initialization code of the library (SysInitFPU) unmasks the InvalidOp > exception. That's this problem: http://bugs.freepascal.org/view.php?id=16263 > I now call "SetSSECSR(GetSSECSR or $0080);" in the initialization > section of my main unit You should use math.SetExceptionMask instead, the above can lead to inconsistent situations. > to mask out the InvalidOp exception again. > But I wonder if this could break something (in rtl or internal FPC > functions). No, unless you have code that depends on exceptions being generated for invalid floating point operations. Jonas _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
