<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [regression][hang] Trine1EE hangs GPU after loading screen on Mesa3D-17.3 and later" href="https://bugs.freedesktop.org/show_bug.cgi?id=105670#c12">Comment # 12</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [regression][hang] Trine1EE hangs GPU after loading screen on Mesa3D-17.3 and later" href="https://bugs.freedesktop.org/show_bug.cgi?id=105670">bug 105670</a> from <a class="email" href="mailto:iive@yahoo.com" title="iive@yahoo.com">iive@yahoo.com</a> <pre>(In reply to Gert Wollny from <a href="show_bug.cgi?id=105670#c11">comment #11</a>) > The if statement can be be true because > which means at this point R3.w can be zero. But that's the point in my initial question. When R3.w=0.0, will "if(+0.0 != -0.0)" be true of false, because float points do have 2 different zeroes - positive and negative one, and both zero floats do have different binary representation aka +0.0 = 0x00000000; -0.0 = 0x80000000. My question is more of the lines: are shader float point operations always IEEE complaint, and is it guaranteed that (+0.0 == -0.0) is true for all their implementations. (For example, SSE float operations sometimes deviate from IEEE for speed reasons.)</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>