Availability of POPCNT instruction? (x86-64)

By: Antoine (pitrou.delete@this.free.fr), May 22, 2019 1:49 am
Room: Moderated Discussions
Hello,

we're getting reports by users of crashes on the POPCNT instruction.
According to Wikipedia (https://en.wikipedia.org/wiki/SSE4#POPCNT_and_LZCNT), it should be available on all post-Silvermont and post-Nehalem processors.

However, "illegal instruction" crashes happen at least on some Pentium B950 and Celeron N3060 machines. What could be the issue? BIOS problem perhaps?
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TopicPosted ByDate
Availability of POPCNT instruction? (x86-64)Antoine2019/05/22 01:49 AM
  Availability of POPCNT instruction? (x86-64)Adrian2019/05/22 02:36 AM
  Availability of POPCNT instruction? (x86-64)anonymou52019/05/22 06:23 AM
    Availability of POPCNT instruction? (x86-64)Antoine2019/05/22 12:37 PM
      Availability of POPCNT instruction? (x86-64)Adrian2019/05/23 03:32 AM
        single code path ?!Eric Bron2019/05/23 03:22 PM
          single code path ?!Antoine2019/05/24 05:24 AM
            single code path ?!Eric Bron2019/05/24 05:53 AM
  Availability of POPCNT instruction? (x86-64)Brendan2019/05/23 02:53 AM
    Availability of POPCNT instruction? (x86-64)Antoine2019/05/23 10:12 AM
      Availability of POPCNT instruction? (x86-64)Brendan2019/05/23 11:45 AM
        Availability of POPCNT instruction? (x86-64)Brett2019/05/23 12:05 PM
          Availability of POPCNT instruction? (x86-64)Gabriele Svelto2019/05/24 01:01 AM
            Availability of POPCNT instruction? (x86-64)Eric Bron2019/05/24 01:15 AM
              Availability of POPCNT instruction? (x86-64)Gabriele Svelto2019/05/24 03:01 AM
                Availability of POPCNT instruction? (x86-64)Eric Bron2019/05/24 03:44 AM
                Availability of POPCNT instruction? (x86-64)Adrian2019/05/24 03:45 AM
                  Availability of POPCNT instruction? (x86-64)Eric Bron2019/05/24 04:27 AM
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