Bulldozer's integer execution units

By: Exophase (exophase.delete@this.gmail.com), April 27, 2012 8:42 am
Room: Moderated Discussions
David Kanter (dkanter@realworldtech.com) on 4/26/12 wrote:
---------------------------
>Maybe just do LD-->LD in the same pipe?

Hm, okay. So the AGU could at least forward to itself (I guess that was implied?) Still, wouldn't being able to forward from AGU to AGU at least offer theoretically less execution resource pressure in some scenarios? Not saying they should have done it, was just wondering if it'd really be worth nothing.


>JF is a nice guy, but relying on him for architectural details is a bit silly.
>

I don't think it's silly to believe that a relatively high level and public employee at AMD would be passing on accurate technical information, especially with no disclaimer up front in his posts that he isn't an engineer. His blog posts even have a deliberate function of attempting to convey technical information. I don't think one should expect much in the way of low level details but it's reasonable to expect the things he says to not be blatantly false. AMD should have probably been more careful about what they let him post, and when that included misinformation he should have been urged to correct it.

>Actually the AGU is quite useful for a design where you can't re-order.

Yeah, just so you know where I'm coming from I thought this also because JF said the third AGU was useless >_> (yes, I do get what you said about listening to him ;P) Which I took to mean that the two load/store pipelines were closely coupled to two AGUs and the third one couldn't actually submit results to it.

If all three AGUs can forward to two L/S paths then it's useful even with memory reordering, as is the case in Sandy Bridge, right?
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    So, what do people think of these numbers>Linus Torvalds2012/04/20 08:34 AM
      So, what do people think of these numbers>Kira2012/04/20 09:18 AM
        So, what do people think of these numbers>Linus Torvalds2012/04/20 10:05 AM
      So, what do people think of these numbers>Doug Siebert2012/04/20 09:00 PM
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        So, what do people think of these numbers>Linus Torvalds2012/04/20 01:24 PM
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            So, what do people think of these numbers>Kira2012/04/20 03:32 PM
              So, what do people think of these numbers>EduardoS2012/04/20 04:00 PM
                Bulldozer's Oddities.Joel2012/04/20 04:54 PM
                  In defense of Bulldozer's OdditiesDavid Kanter2012/04/20 05:32 PM
                    In defense of Bulldozer's OdditiesExophase2012/04/20 07:11 PM
                      In defense of Bulldozer's OdditiesEduardoS2012/04/20 07:46 PM
                        In defense of Bulldozer's OdditiesExophase2012/04/20 08:18 PM
                          In defense of Bulldozer's Odditiesanonymous2012/04/20 11:26 PM
                            In defense of Bulldozer's OdditiesJJB2012/04/20 11:34 PM
                              In defense of Bulldozer's Odditiesimaxx2012/04/21 07:21 AM
                                In defense of Bulldozer's OdditiesMichael S2012/04/21 10:42 AM
                                  Bulldozer's integer execution unitsDavid Kanter2012/04/25 04:29 PM
                                    Bulldozer's integer execution unitsExophase2012/04/26 12:17 PM
                                      Bulldozer's integer execution unitsanonymous2012/04/26 03:15 PM
                                        Bulldozer's integer execution unitsEduardoS2012/04/26 03:40 PM
                                          Bulldozer's integer execution unitsFoo_2012/04/27 08:21 AM
                                            Bulldozer's integer execution unitsMegol2012/04/27 01:38 PM
                                      Bulldozer's integer execution unitsEduardoS2012/04/26 03:47 PM
                                        Bulldozer's integer execution unitsExophase2012/04/26 05:02 PM
                                          Bulldozer's integer execution unitsEduardoS2012/04/26 06:03 PM
                                            Bulldozer's integer execution unitsExophase2012/04/26 06:24 PM
                                              Bulldozer's integer execution unitsEduardoS2012/04/26 07:18 PM
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                                                  Bulldozer's cache memory performanceEduardoS2012/04/28 10:06 AM
                                      Bulldozer's integer execution unitsDavid Kanter2012/04/26 04:03 PM
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                                          Bulldozer's integer execution unitsDavid Kanter2012/04/26 10:53 PM
                                            Bulldozer's integer execution unitsExophase2012/04/27 08:42 AM
                                              Bulldozer's integer execution unitsDavid Kanter2012/04/27 11:06 AM
                                                Bulldozer's integer execution unitsEduardoS2012/04/27 01:27 PM
                                                K8 divided pipelines?Paul A. Clayton2012/04/27 01:59 PM
                                          Bulldozer's integer execution unitsMichael S2012/04/27 04:37 AM
                                            Bulldozer's integer execution unitsExophase2012/04/27 08:33 AM
                                            Bulldozer's integer execution unitsanonymous2012/04/27 09:03 AM
                                    Renaming FlagsKonrad Schwarz2012/04/27 03:04 AM
                                      Renaming Flagsnone2012/04/27 04:03 AM
                                        Renaming FlagsMegol2012/04/27 12:42 PM
                                    Bulldozer's integer execution unitshcl642012/04/27 04:31 PM
                                      VEX supports 3+ operands. FPU have renaming already(NT)Megol2012/04/28 08:20 AM
                              In defense of Bulldozer's OdditiesLinus Torvalds2012/04/21 12:26 PM
                                Thanks for the lessonJJB2012/04/21 02:23 PM
                                  Side note..Linus Torvalds2012/04/21 02:57 PM
                            In defense of Bulldozer's OdditiesExophase2012/04/21 12:13 PM
                            In defense of Bulldozer's OdditiesEduardoS2012/04/21 12:53 PM
                    In defense of Bulldozer's OdditiesGionatan Danti2012/04/21 12:42 PM
                    In defense of Bulldozer's Odditieshcl642012/04/27 05:07 PM
                      In defense of Bulldozer's OdditiesDavid Kanter2012/04/28 06:29 AM
                        In defense of Bulldozer's Odditieshcl642012/04/28 02:44 PM
                          In defense of Bulldozer's OdditiesDavid Kanter2012/04/28 09:42 PM
                            In defense of Bulldozer's Odditieshcl642012/04/28 10:39 PM
                  Bulldozer's Oddities.EduardoS2012/04/20 06:05 PM
                    Bulldozer's Oddities.anon2012/04/20 08:32 PM
                      Bulldozer's Oddities.EduardoS2012/04/21 12:37 PM
                        Bulldozer's Oddities.anon2012/04/21 10:16 PM
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                            Bulldozer's Oddities.anon2012/04/22 02:09 AM
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                                Bulldozer's Oddities.anon2012/04/22 04:17 PM
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                                        Bulldozer's Oddities.anon2012/04/22 11:05 PM
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                      Bulldozer's isn't bad.hcl642012/04/27 05:58 PM
                        Bulldozer's isn't bad.anon2012/04/27 06:16 PM
                          Bulldozer's isn't bad.hcl642012/04/27 07:33 PM
                            Bulldozer's isn't bad.rwessel2012/04/27 11:12 PM
                        Bulldozer's isn't bad.EduardoS2012/04/28 09:29 AM
                          Bulldozer's isn't bad.EduardoS2012/04/28 09:30 AM
                          Bulldozer's isn't bad.Michael S2012/04/28 12:36 PM
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                  Bulldozer's Oddities.mpx2012/04/22 03:47 AM
                    Bulldozer's Oddities.EduardoS2012/04/22 01:57 PM
                      Bulldozer's Oddities.mpx2012/04/23 07:04 AM
                        Bulldozer's Oddities.Eric2012/04/23 12:33 PM
                          Bulldozer's Oddities.EduardoS2012/04/23 02:22 PM
                            Bulldozer's Oddities.Eric2012/04/23 07:30 PM
                              Bulldozer's Oddities.hcl642012/04/27 06:16 PM
                            Bulldozer's Oddities.Y2012/04/25 04:34 AM
                              Bulldozer's IDIVHeikki Kultala2012/04/27 10:56 PM
                                Bulldozer's IDIVY2012/04/30 01:51 AM
                                  Bulldozer's IDIVEduardoS2012/04/30 05:39 AM
                                    Bulldozer's IDIVP3Dnow2012/05/08 01:23 AM
                                      Bulldozer's IDIVExophase2012/05/08 07:37 AM
                        Bulldozer's Oddities.EduardoS2012/04/23 02:15 PM
              Clustered MT as SMT for high frequencyPaul A. Clayton2012/04/20 04:10 PM
                Clustered MT as SMT for high frequencyhcl642012/04/28 12:56 AM
                  Clustered MT as SMT for high frequencyanonymous2012/04/28 01:43 AM
                    Clustered MT as SMT for high frequencyhcl642012/04/28 02:59 PM
                      Clustered MT as SMT for high frequencyanonymous2012/04/28 08:45 PM
                  Clustered MT as SMT for high frequencyanon2012/04/28 02:13 AM
                    Clustered MT as SMT for high frequencyhcl642012/04/28 03:23 PM
                      Clustered MT as SMT for high frequencyanon2012/04/28 06:19 PM
                        Clustered MT as SMT for high frequencyhcl642012/04/28 07:58 PM
                  Clustered MT as SMT for high frequencyDavid Kanter2012/04/28 06:38 AM
                    Guessed meaning of "strong dependency model"Paul A. Clayton2012/04/28 07:24 AM
                      Guessed meaning of "strong dependency model"EduardoS2012/04/28 09:46 AM
                        *Right meaning* about "strong dependency model"hcl642012/04/28 04:59 PM
                    Clustered MT as SMT for high frequencyhcl642012/04/28 04:24 PM
                      Clustered MT as SMT for high frequencyanonymous2012/04/28 08:50 PM
                        Clustered MT as SMT for high frequencyhcl642012/04/28 09:47 PM
                          SNB widthDavid Kanter2012/04/28 09:48 PM
                            SNB widthhcl642012/04/29 02:24 AM
                      Clustered MT as SMT for high frequencyDavid Kanter2012/04/28 09:56 PM
                        Clustered MT as SMT for high frequencyhcl642012/04/28 11:44 PM
                          SOI, FD vs. PDDavid Kanter2012/04/29 07:19 AM
                            SOI, FD vs. PDhcl642012/04/29 05:31 PM
                              SOI, FD vs. PDDavid Kanter2012/04/29 11:26 PM
                                SOI, FD vs. PDhcl642012/04/30 08:08 AM
                                  SOI, FD vs. PDDavid Kanter2012/04/30 09:59 AM
                                    SOI, FD vs. PDhcl642012/04/30 06:10 PM
                                      SOI, FD vs. PDDavid Kanter2012/04/30 06:32 PM
                                        SOI, FD vs. PDhcl642012/04/30 10:47 PM
                                          SOI, FD vs. PDDavid Kanter2012/05/01 02:24 AM
                                            SOI, FD vs. PDhcl642012/05/01 05:46 AM
                                            SOI, FD vs. PDhcl642012/05/01 06:37 AM
                                              SOI, FD vs. PDDavid Kanter2012/05/01 08:19 AM
                                          SOI, FD vs. PDhcl642012/05/01 07:39 AM
                                            PD-SOIDavid Kanter2012/05/02 12:22 PM
                                    SOI, FD vs. PDslacker2012/04/30 08:10 PM
                                      SOI, FD vs. PDDavid Kanter2012/04/30 10:16 PM
                                        SOI, FD vs. PDslacker2012/05/01 10:04 PM
                                          SOI, FD vs. PDDavid Kanter2012/05/02 08:19 AM
                                            SOI, FD vs. PDzou2012/05/02 12:23 PM
                  Previous discussion of clustered MTPaul A. Clayton2012/04/28 07:00 AM
                    Previous discussion of clustered MThcl642012/04/28 09:38 PM
                      Previous discussion of clustered MTDavid Kanter2012/04/30 04:37 PM
                        Previous discussion of clustered MThcl642012/04/30 07:24 PM
                          Previous discussion of clustered MTDavid Kanter2012/04/30 07:40 PM
                            Previous discussion of clustered MThcl642012/05/01 09:15 AM
                              Latency issuesDavid Kanter2012/05/02 12:01 PM
              So, what do people think of these numbers>Megol2012/04/21 01:57 AM
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