Tremont clarification: 2x3 decoders

By: David Kanter (dkanter.delete@this.realworldtech.com), January 21, 2021 6:56 pm
Room: Moderated Discussions
Hey Folks,

Wanted to provide an update on the monster Tremont decoding thread.

Based on offline discussions with some Intel architects, they have confirmed my description...namely Tremont has 2x3 decoders that can (in some circumstances) simultaneously decode out-of-order from a single thread.

As folks have pointed out, for straight-line code with no branches...the decoding throughput would be limited to 3 x86 instructions per clock. When branches are carefully inserted (or already present), the front-end can sustain up to 6 x86 instructions per clock.

Thanks for reading and the great discussion :)

David
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TopicPosted ByDate
Tremont clarification: 2x3 decodersDavid Kanter2021/01/21 06:56 PM
  Tremont clarification: 2x3 decodersChester2021/01/21 07:41 PM
  Tremont clarification: 2x3 decodersFoo_2021/01/22 05:17 AM
  Tremont clarification: 2x3 decodersRayla2021/01/22 07:07 AM
    Good question!David Kanter2021/01/26 10:10 AM
  Tremont clarification: 2x3 decoders2021/01/23 12:01 PM
    Tremont clarification: 2x3 decodersDavid Kanter2021/01/23 12:52 PM
    Why have separate decoder for taken branchHeikki Kultala2021/01/24 12:33 AM
      Why have separate decoder for taken branch2021/01/24 02:26 AM
        Why have separate decoder for taken branch2021/01/24 02:56 AM
          Why have separate decoder for taken branchrwessel2021/01/24 10:02 AM
            Why have separate decoder for taken branchBrett2021/01/24 04:24 PM
          Why have separate decoder for taken branchUngo2021/01/24 04:48 PM
            Why have separate decoder for taken branchGionatan Danti2021/01/25 12:28 AM
        Why have separate decoder for taken branchsylt2021/01/24 05:37 AM
  Tremont clarification: 2x3 decodersdmcq2021/01/24 04:39 AM
    Tremont clarification: 2x3 decodersanon.12021/01/24 08:53 AM
      Tremont clarification: 2x3 decodersdmcq2021/01/24 09:46 AM
        Tremont clarification: 2x3 decodersanon.12021/01/24 11:44 AM
          Not both sides...David Kanter2021/01/24 12:05 PM
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