<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [radeonsi] playing back videos with VDPAU exhibits deinterlacing/anti-aliasing issues not visible with VA-API" href="https://bugs.freedesktop.org/show_bug.cgi?id=97988#c14">Comment # 14</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [radeonsi] playing back videos with VDPAU exhibits deinterlacing/anti-aliasing issues not visible with VA-API" href="https://bugs.freedesktop.org/show_bug.cgi?id=97988">bug 97988</a> from <a class="email" href="mailto:deathsimple@vodafone.de" title="Christian König <deathsimple@vodafone.de>"> Christian König</a> <pre>(In reply to Marek Olšák from <a href="show_bug.cgi?id=97988#c13">comment #13</a>) > (In reply to Tom Stellard from <a href="show_bug.cgi?id=97988#c12">comment #12</a>) > > > > I think the best solution here would be to teach the backend how to do a > > scalar select based on value of vccz. > > You are missing the point. The condition code (VCC) isn't the same across > all threads. The problem is that the conditional assignment is transformed > into a form that makes descriptor load addresses non-uniform (dependent on a > VGPR). There is nothing the AMDGPU backend can do about it. It's not a > problem in the backend. Well the backend could iterate over all the variants to handle that, but I have strong doubts that this would result in optimal performance. So I think the best solution for now would be to mark the texture intrinsic in a way which disallows such optimizations.</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> </ul> </body> </html>