On Fri, Feb 27, 2015 at 1:24 PM, Ian Romanick <i...@freedesktop.org> wrote: > On 02/27/2015 11:34 AM, Matt Turner wrote: >> We can safely propagate the conditional mod to an instruction with a >> different type if the conditional mod does not involve comparing for >> equality with zero (or probably NaN, but ignore that for now). >> >> This is because -0.0 and +0.0 are both test equal to zero, but their >> integer representations do not. > > That sounds really sketchy. Did you try to make a stand-alone test to > reproduce the problem based on your theory?
I just sent a piglit test that confirms that this is a problem (and that this patch fixes it). _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
