rmuir commented on issue #12621: URL: https://github.com/apache/lucene/issues/12621#issuecomment-1747026111
Also their suggested replacement of 3 instructions for the `VPDPBUSD` is: > Likewise, for 8-bit values, three instructions are needed - VPMADDUBSW which is used to multiply two 8-bit pairs and add them together, followed by a VPMADDWD with the value 1 in order to simply up-convert the 16-bit values to 32-bit values, followed by the VPADDD instruction which adds the result to an accumulator. I can tell you this is also not what is happening. We have no ability to write AVX-512-specific code and currently have to support ARM, machines with only AVX-256, etc. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: issues-unsubscr...@lucene.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@lucene.apache.org For additional commands, e-mail: issues-h...@lucene.apache.org
