Am Donnerstag, den 19.01.2006, 22:07 +0100 schrieb Jerome Glisse: > Hi Ben, > > I don't know if you remember but we got a discussion > on swizzle issue when we have to write W to a XYZ few > month ago. You solved the issue by syncing the XYZ & W > emit, right (emitting W with the last XYZ emit) ? I recall the discussion. The issue at the time was a misunderstanding on my behalf of how the XYZ and W units interact.
> > It seems that if you emit something like : > srcmask(WZX) writemask(X) you have the wrong result but > srcmask(WZX) writemask(XY or XZ or XYZ) give right result > without syncing. I am update my swizzling table to do so. Does this fail with the current cvs? If so, can you switch on the call to dump_program() at the end of translate_fragment_shader() and post the output as well as the test program? > > So i wonder if you have anythought on that, or anybody > else. Doing so i am able to avoid syncing, this may > not be a big save anyway. The "syncing" is just forcing the XYZ and W components of an instruction into the same ALU slot. There are some cases where this is necessary, namely when there is interaction between the two units. Two cases I know of is when REPL_ALPHA or SWIZZLE_WZY is used. Cheers, Ben. > > We may miss something here on r300... > > best, > Jerome Glisse > > > ------------------------------------------------------- > This SF.net email is sponsored by: Splunk Inc. Do you grep through log files > for problems? Stop! Download the new AJAX search engine that makes > searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! > http://sel.as-us.falkag.net/sel?cmd=lnk&kid3432&bid#0486&dat1642 > -- > _______________________________________________ > Dri-devel mailing list > Dri-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/dri-devel ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=103432&bid=230486&dat=121642 -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
