On Tue, Jun 20, 2017 at 04:12:18PM +0100, Henry Vermaak wrote: > On Tue, Jun 20, 2017 at 10:53:32AM -0400, Anthony Walter wrote: > > Some progress ... Since this is an OpenGL app I had been > > setting Set8087CW($133F) to prevent FPU errors from showing as exceptions. > > When I omit Set8087CW I get EDivByZero an exception, but my program is > > still in an unusable state. > > > > Since this error occurs in the SSE XMM registers, I think I should also be > > using the SetSSECSR function. Does anyone have any details about how this > > function works in relation to XMM registers and rounding or divide by zero > > errors and how it could be applied in my situation? > > I use this for all my programs that use C libraries: > > {$if defined(cpui386) or defined(cpux86_64)} > SetExceptionMask(GetExceptionMask + [exZeroDivide, exInvalidOp]); > {$ifend} > > Works fine with libs like OpenCV, etc.
Sorry, meant to add that this will also set the flags in MXCSR if you look at the implementation of SetExceptionMask(). Henry _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-devel