<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - OpenCL enqueueReadBuffer returns trash" href="https://bugs.freedesktop.org/show_bug.cgi?id=101952#c5">Comment # 5</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - OpenCL enqueueReadBuffer returns trash" href="https://bugs.freedesktop.org/show_bug.cgi?id=101952">bug 101952</a> from <a class="email" href="mailto:jan.vesely@rutgers.edu" title="Jan Vesely <jan.vesely@rutgers.edu>"> Jan Vesely</a> <pre>(In reply to Janpieter Sollie from <a href="show_bug.cgi?id=101952#c4">comment #4</a>) > yes, a simpler kernel works perfectly. Though I think it only makes the > search more difficult: yes, it might be miscompilation on clover/llvm part, or the program relies on undefined behaviour that is just implemented differently in mesa/clover. > the combination of these functions does not work (no 255 is visible): > in external_function_call: > while (left > 0) { > count++; > extern2(2048, count, digest); > plen = left > SHA1_MAC_LEN ? SHA1_MAC_LEN : left; > // result = get_global_id(0) | get_global_id(1) | > get_global_id(2); > result += os_memcmp(digest, pos, plen); Is the 'result' variable initialized at the beginning of this function? > pos += plen; > left -= plen; > } > return result; > in startTest: > if(result == 2) { > output[3] = 255; > output[0] = get_global_id(0); > output[1] = get_global_id(1); > output[2] = get_global_id(2); > } > ---------------------------------------- > while > result = get_global_id(0) | get_global_id(1) | > get_global_id(2); > // result += os_memcmp(digest, pos, plen); > > and > if(result == 0) { > > does work! (255 int included) :s > > I suspect an overflow happens somewhere, but is it possible oclgrind does > not detect it?</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the QA Contact for the bug.</li> <li>You are the assignee for the bug.</li> </ul> </body> </html>