FP ADDs are not that fast

Article: AMD's Bulldozer Microarchitecture
By: EduardoS (no.delete@this.spam.com), September 30, 2010 2:57 pm
Room: Moderated Discussions
Michael S (already5chosen@yahoo.com) on 9/30/10 wrote:
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>BTW, why do you feel that 946ps for add at 65nm is slow?
>Are there actual examples of faster circuits? I think Intel Merom was 1000ps, IBM Power6 and AMD K8 were slower yet.

Intel Merom was 1000ps but pipelinezed and with extra logic.
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TopicPosted ByDate
Bulldozer article onlineDavid Kanter2010/08/30 11:44 PM
  Bulldozer article onlineTriskaine2010/08/31 01:14 AM
  Bulldozer article online?2010/08/31 02:39 AM
    Bulldozer article onlinehobold2010/08/31 11:00 AM
    Dispatch groupsDavid Kanter2010/08/31 12:52 PM
      Dispatch groupsIntelUser20002010/08/31 02:40 PM
        Dispatch groupsDavid Kanter2010/08/31 03:22 PM
      Dispatch groupsarb2010/08/31 03:11 PM
        Dispatch groupsredpriest2010/08/31 08:46 PM
      Dispatch groups?2010/09/01 12:41 AM
        Dispatch groupsDavid Kanter2010/09/01 09:15 AM
          Dispatch groups?2010/09/01 10:03 AM
  Bulldozer article onlineAlex2010/08/31 03:45 AM
    Bulldozer article onlineIntelUser20002010/08/31 06:46 AM
      merci (NT)Alex2010/08/31 10:02 AM
    Bulldozer article onlinehobold2010/08/31 10:56 AM
      Bulldozer article onlineDavid Kanter2010/08/31 12:53 PM
  Bulldozer article onlinesomeone2010/08/31 06:09 AM
    Bulldozer article onlineIntelUser20002010/08/31 06:41 AM
      Thanks (NT)someone2010/08/31 06:52 AM
  Bulldozer article onlineRohit2010/08/31 06:13 AM
    Extremely unlikelyDaniel Bizó2010/08/31 03:00 PM
      Bulldozer versus Westmere single threaded performanceMark Roulo2010/08/31 03:35 PM
        Bulldozer versus Westmere single threaded performanceHoward Chu2010/08/31 07:25 PM
        Bulldozer versus Westmere single threaded performanceAndreas2010/09/01 01:01 AM
          Bulldozer versus Westmere single threaded performanceFoo_2010/09/01 02:11 AM
            Bulldozer versus Westmere single threaded performanceJack2010/09/01 10:08 PM
              Bulldozer versus Westmere single threaded performanceslacker2010/09/02 05:59 AM
                Bulldozer versus Westmere single threaded performanceJack2010/09/02 05:14 PM
        Bulldozer versus Westmere single threaded performanceRichard Cownie2010/09/01 04:41 AM
          Bulldozer versus Westmere single threaded performance?2010/09/01 06:10 AM
            Bulldozer versus Westmere single threaded performanceRichard Cownie2010/09/01 08:11 AM
              Bulldozer versus Westmere single threaded performanceDavid Kanter2010/09/01 08:50 AM
          Bulldozer versus Westmere single threaded performanceMark Roulo2010/09/01 09:14 AM
            Bulldozer versus Westmere single threaded performanceRichard Cownie2010/09/01 09:33 AM
      There is no 20% penalty of two threads compared to single core - it's 10%Heikki Kultala2010/09/02 10:39 PM
        There is no 20% penalty of two threads compared to single core - it's 10%Azazel2010/09/03 12:35 AM
          There is no 20% penalty of two threads compared to single core - it's 10%?2010/09/03 02:40 AM
          There is no 20% penalty of two threads compared to single core - it's 10%Heikki Kultala2010/09/03 03:49 AM
            There is no 20% penalty of two threads compared to single core - it's 10%Azazel2010/09/03 07:31 AM
          There is no 20% penalty of two threads compared to single core - it's 10%MS2010/09/03 06:27 AM
          Don't read too much into it...David Kanter2010/09/03 03:14 PM
            Don't read too much into it...DC2010/09/05 11:07 AM
  Bulldozer article onlineIan Ollmann2010/08/31 05:07 PM
    Bulldozer article onlineMatt Waldhauer2010/09/05 04:10 AM
      Bulldozer article onlinehobold2010/09/05 08:19 AM
        Bulldozer article onlineDC2010/09/05 11:12 AM
          Bulldozer article onlineMichael S2010/09/05 12:27 PM
            Bulldozer article onlineBrett2010/09/05 03:01 PM
          Bulldozer article onlinesomeone2010/09/05 01:56 PM
            Bulldozer article onlineAlex2010/09/05 02:59 PM
              Bulldozer article onlinesomeone2010/09/05 03:05 PM
                Bulldozer article onlineDC2010/09/06 07:38 AM
                  Bulldozer article onlinesomeone2010/09/06 08:24 AM
                  Bulldozer article onlineDavid Kanter2010/09/06 05:12 PM
                    Bulldozer article onlineEduardoS2010/09/06 06:21 PM
                    Bulldozer article onlineanon2010/09/06 06:26 PM
                      Bulldozer article onlineDavid Kanter2010/09/06 07:55 PM
                        Bulldozer article onlineanon2010/09/06 10:49 PM
                          Bulldozer article onlineDavid Kanter2010/09/06 10:57 PM
                            Bulldozer article onlineJack2010/09/07 09:55 PM
                            Bulldozer article onlineslacker2010/09/08 05:53 AM
            Bulldozer article onlineDC2010/09/06 07:43 AM
              Bulldozer article onlineMegol2010/09/06 08:27 AM
              Bulldozer article onlinesomeone2010/09/06 08:53 AM
                Why SOIDavid Kanter2010/09/06 05:19 PM
              Bulldozer article onlineJack2010/09/07 10:16 PM
                Bulldozer article onlineslacker2010/09/08 08:05 AM
                  Bulldozer article onlinesomeone2010/09/08 09:35 AM
                  Bulldozer article onlineJack2010/09/12 08:26 PM
                Bulldozer article onlinesomeone2010/09/08 09:03 AM
                  Some strawmen will never die (NT)slacker2010/09/08 09:13 AM
                    Yeah, like PD-SOI is worth the effort (NT)someone2010/09/08 09:39 AM
                      PDSOI is worth production dollars; FDSOI & silicon lasing are Intel's wet dreamslacker2010/09/08 10:54 AM
                  Bulldozer article onlineFritz2010/09/22 03:41 AM
                    Bulldozer article onlineanonymous2010/09/22 11:12 AM
                      Bulldozer article onlinesavantu2010/09/22 09:13 PM
      Bulldozer article onlineIan Ollmann2010/09/24 05:50 PM
        Bulldozer article onlineIan Ollmann2010/09/24 06:21 PM
          Bulldozer article onlineEduardoS2010/09/24 08:47 PM
            Bulldozer article onlineMichael S2010/09/25 10:41 AM
            Faster FADDPaul A. Clayton2010/09/25 11:58 AM
              Faster FADDEduardoS2010/09/25 12:07 PM
                Faster FADDPaul A. Clayton2010/09/28 11:29 AM
          Bulldozer article onlineMichael S2010/09/25 10:38 AM
        Bulldozer article onlineDavid Kanter2010/09/25 01:55 AM
        Bulldozer article onlineHans de Vries2010/09/26 06:58 AM
          Bulldozer article onlineDavid Kanter2010/09/26 10:38 AM
            Bulldozer article onlineHans de Vries2010/09/26 02:48 PM
              Bulldozer article onlineEduardoS2010/09/26 03:47 PM
                FP ADDs are not that fastMatt Waldhauer2010/09/30 07:46 AM
                  FP ADDs are not that fastsJ2010/09/30 11:24 AM
                    FP ADDs are not that fastEduardoS2010/09/30 01:41 PM
                      FP ADDs are not that fastrwessel2010/09/30 02:41 PM
                    FP ADDs are not that fastHans de Vries2010/09/30 07:11 PM
                  FP ADDs are not that fastEduardoS2010/09/30 01:43 PM
                    FP ADDs are not that fastMichael S2010/09/30 02:25 PM
                      FP ADDs are not that fastEduardoS2010/09/30 02:57 PM
                      FP ADDs are not that fastEric Quinnell2010/10/01 01:29 PM
                        FP ADDs are not that fastEduardoS2010/10/01 01:40 PM
                          FP ADDs are not that fastDavid Kanter2010/10/01 02:29 PM
                        Delayed post-result shift?Paul A. Clayton2010/10/01 06:14 PM
              Bulldozer article onlineDavid Kanter2010/09/26 03:50 PM
                Fusing into FMAPaul A. Clayton2010/09/27 02:01 PM
                  Fusing into FMAIan Ollmann2010/09/28 04:58 PM
                    Fusing into FMAPaul A. Clayton2010/09/29 07:25 AM
              Bulldozer article onlineMichael S2010/09/26 04:23 PM
                Bulldozer article onlineanonymous2010/09/27 01:38 AM
                  Bulldozer article onlineMichael S2010/09/27 05:00 AM
          Bulldozer article onlineEduardoS2010/09/26 10:51 AM
            Bulldozer article onlineHans de Vries2010/09/26 12:32 PM
          Bulldozer article onlineHans de Vries2010/09/26 12:28 PM
  Bulldozer article onlineMS2010/09/01 06:15 AM
  10h family 4MiB page TLB entriesPaul A. Clayton2010/09/01 06:01 PM
    10h family 4MiB page TLB entriesEduardoS2010/09/01 06:40 PM
      10h family 4MiB page TLB entriesrwessel2010/09/02 04:09 AM
        10h family 4MiB page TLB entriesEduardoS2010/09/02 03:04 PM
  Bulldozer article onlineDan Downs2010/09/02 08:28 AM
    Bulldozer article onlineslacker2010/09/02 08:37 AM
      Bulldozer article onlineDan Downs2010/09/02 10:06 AM
        Bulldozer article onlineDavid Kanter2010/09/02 04:41 PM
          Bulldozer article onlineDan Downs2010/09/02 10:42 PM
    one thread in two cores - NOHeikki Kultala2010/09/02 10:25 PM
      RF portsDavid Kanter2010/09/04 01:32 PM
  Slightly OT, but does iAtom use physical register files (PRF), too ? (NT)Alex2010/09/02 03:49 PM
    AFAIK Atom does not rename registersHeikki Kultala2010/09/03 03:46 AM
      AFAIK Atom does not rename registersAlex2010/09/03 08:41 AM
  FMACs can be ganged together, confirmed already by JF (link inside)Alex2010/09/08 04:44 PM
    FMACs can be ganged together, confirmed already by JF (link inside)David Kanter2010/09/09 07:32 AM
      FMACs can be ganged together, confirmed already by JF (link inside)Triskaine2010/09/09 07:48 AM
        FMACs can be ganged together, confirmed already by JF (link inside)David Kanter2010/09/09 08:11 AM
          FMACs can be ganged together, confirmed already by JF (link inside)arb2010/09/09 09:22 AM
            Bulldozer and AVXDavid Kanter2010/09/09 10:21 AM
          FMACs can be ganged together, confirmed already by JF (link inside)gruehunter2010/09/09 01:08 PM
            FMACs can be ganged together, confirmed already by JF (link inside)David Kanter2010/09/09 04:39 PM
              FMACs can be ganged together, confirmed already by JF (link inside)redpriest2010/09/09 09:56 PM
                FMACs can be ganged together, confirmed already by JF (link inside)Anthony2010/09/10 11:59 AM
                  FMACs can be ganged together, confirmed already by JF (link inside)someone2010/09/10 12:11 PM
      FMACs can be ganged together, confirmed already by JF (link inside)Alex2010/09/10 12:04 PM
    FMACs can be ganged together, confirmed already by JF (link inside) -- Oh No JFFritz2010/09/22 04:37 AM
      FMACs can be ganged together, confirmed already by JF (link inside) -- Oh No JFAnthony2010/09/22 11:01 AM
        FMACs can be ganged together, confirmed already by JF (link inside) -- Oh No JFDavid Kanter2010/09/22 11:22 AM
          FMACs can be ganged together, confirmed already by JF (link inside) -- Oh No JFanon2010/09/22 12:19 PM
            Bulldozer FPDavid Kanter2010/09/22 03:32 PM
              Bulldozer FPEduardoS2010/09/22 04:17 PM
                Bulldozer FPAaron Spink2010/09/23 12:13 PM
                  Bulldozer FPEduardoS2010/09/23 02:04 PM
                Bulldozer FPMichael S2010/09/23 01:26 PM
              Bulldozer FPanonymous2010/09/22 04:35 PM
              Bulldozer FPhobold2010/09/23 08:21 AM
                Bulldozer FPanon2010/09/23 11:59 AM
                  Bulldozer FPEduardoS2010/09/23 02:12 PM
                  Bulldozer FPhobold2010/09/23 02:19 PM
              Bulldozer FPHans de Vries2010/09/23 10:07 AM
                Bulldozer FPEric Bron2010/09/23 11:05 AM
          FMACs can be ganged together, confirmed already by JF (link inside) -- Oh No JFredpriest2010/09/23 05:47 PM
      FMACs can be ganged together, confirmed already by JF (link inside) -- Oh No JFAnthony2010/09/22 11:01 AM
  Bulldozer article onlineMarcal2010/09/29 03:13 AM
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