fractional bits

By: anon (spam.delete.delete@this.this.spam.com), April 17, 2017 2:29 pm
Room: Moderated Discussions
Maynard Handley (name99.delete@this.name99.org) on April 17, 2017 11:53 am wrote:
> Gabriele Svelto (gabriele.svelto.delete@this.gmail.com) on April 17, 2017 10:09 am wrote:
> > dmcq (dmcq.delete@this.fano.co.uk) on April 17, 2017 3:04 am wrote:
> > > I believe Nvidia's Denver keeps executing instructions past the point where it should stall
> > > as a VLIW so it can try to preload operands which will probably be needed. This is in addition
> > > to the normal prediction done by the cache outside of the processor. When the operand needed
> > > at the point of the stall comes back it then continues executing properly from that point.
> >
> > Yes, POWER6 did the same (it was called load look-ahead there,
> > see here for more details). It's no substitute
> > for OoOE, it just makes the common case of stalling on a load less bad from a MLP perspective.
>
> The fact that IBM never did it again (though the POWER6 was an odd-ball machine in many respects),
> and Sun never implemented their version makes you suspect it's a losing idea. Mutlu et al CLAIM:
> https://users.ece.cmu.edu/~omutlu/pub/mutlu_ieee_micro06.pdf
> that by employing a few simple heuristics.
> When you do the comparison against basic prefetching you get an average IPC improvement of around 22%,
> better on workstationFP-stuff, around 15% on integer/server type stuff. (But those simulations, ~2005
> or so, use IMHO an unrealistically small L2 and no L3. You can see more details a few slides in to:
> users.ece.utexas.edu/~patt/06s.382N/handouts/ee382n_mutlu.ppt
> )
> So is 15% worth the power and changes to the core, especially since a better
> prefetcher and modern L2+L3 probably reduces the advantage quite a bit?
>
> I'm guessing everyone (ie Intel, Apple, IBM, ARM, etc) has run the numbers and in every case has concluded
> that for the designs of current machines it's just not enough of a win to justify the power.

Keep in mind that when you are doing OoOE you essentially already have a superior version of runahead mode. You get to reorder the instructions and keep the results if your branch predictor guessed correctly.

If you are using in-order cores on memory bound code then it's usually something with enough TLP that throwing more threads at the problem is more effective. With SMT or SoEMT, for lower implementation cost, the cores are doing useful work pretty much all of the time as long as there are enough threads, instead of just speeding up one thread a bit but spending a lot of time and energy on results that will be discarded and recalculated.



For VLIW it's different and I think the Mill really needs a mechanism like that or something else to do that job.
Otherwise any loads from DRAM that are sitting behind other loads to DRAM (after hoisting of course) will stall when they really shouldn't have to, just because execution stalled before it got to that hoisted load.
Or loads behind control flow. While you're waiting on a cache miss these should all get preloaded.

I mean sure latency in cycles is lower at lower frequencies, but if you do nothing at all while waiting for DRAM that's a ton work not done. VLIW lives off of utilization so when you take multiple DRAM stalls right after another when you could be executing 20+ ops per cycle instead your average is going to be lowered quite a bit.
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TopicPosted ByDate
Apple confirms that they are ditching Imagination within two yearsAnon04/03/17 01:21 AM
  Apple confirms that they are ditching Imagination within two yearsMichael S04/03/17 01:40 AM
    MIPSAnon04/03/17 01:48 AM
      Microprocessor WITH interlocked Pipeline Stages, please rest in peace!Heikki Kultala04/03/17 03:59 AM
        Microprocessor WITH interlocked Pipeline Stages, please rest in peace!RichardC04/03/17 07:17 AM
          RISC *was* science, not religionRichardC04/03/17 05:49 PM
            RISC *was* science, not religionIreland04/03/17 06:12 PM
              RISC *was* science, not religionbakaneko04/03/17 11:40 PM
            RISC *was* science, not religionLinus Torvalds04/03/17 06:25 PM
              RISC *was* science, not religionRichardC04/03/17 06:45 PM
                RISC *was* science, not religionanon04/03/17 08:37 PM
                  RISC *was* science, not religionbakaneko04/04/17 12:00 AM
                    RISC *was* science, not religionMichael S04/04/17 01:23 AM
                    RISC *was* science, not religionanon04/04/17 01:51 AM
                      RISC *was* science, not religionbakaneko04/04/17 04:17 AM
                        RISC *was* science, not religionanon04/04/17 06:39 AM
                RISC *was* science, not religionRichardC04/04/17 06:02 AM
                  RISC *was* science, not religionMichael S04/04/17 07:05 AM
                    RISC *was* science, not religionRichardC04/04/17 08:06 AM
                      Try not to aim for one point on the curve!David Kanter04/05/17 10:15 PM
                        Try not to aim for one point on the curve!RichardC04/06/17 04:11 AM
                          Try not to aim for one point on the curve!Michael S04/06/17 06:17 AM
                            Try not to aim for one point on the curve!Ireland04/06/17 10:16 AM
                            Try not to aim for one point on the curve!RichardC04/06/17 10:25 AM
                              Influence of Palm and Blackberry on Smaller DevicesIreland04/06/17 10:45 AM
                          Try not to aim for one point on the curve!Ireland04/06/17 10:11 AM
                          RISC not needed for smartphones and tabletsHeikki Kultala04/06/17 10:39 PM
                        Try not to aim for one point on the curve!coppice04/07/17 03:52 AM
                          Try not to aim for one point on the curve!Michael_S04/07/17 04:41 AM
                  RISC *was* science, not religionbakaneko04/04/17 07:55 AM
                    RISC *was* science, not religionIreland04/04/17 08:59 AM
                    RISC *was* science, not religionanon04/05/17 03:53 AM
                      RISC *was* science, not religionBrett04/05/17 09:25 PM
                        RISC *was* science, not religionanon04/06/17 02:36 AM
                          RISC *was* science, not religionBrett04/06/17 09:36 PM
                            RISC *was* science, not religionanon04/07/17 07:05 AM
                              RISC *was* science, not religionBrett04/08/17 12:02 AM
                                RISC *was* science, not religiondmcq04/08/17 04:45 AM
                                RISC *was* science, not religionanon04/08/17 08:39 AM
                                  (disappointing) Mill progressUngo04/08/17 01:07 PM
                                    (disappointing) Mill progressMichael S04/08/17 01:36 PM
                                      (disappointing) Mill progresswumpus04/08/17 06:44 PM
                                      I don't understand why they are aiming for CPU instead for DSP (NT)Heikki Kultala04/08/17 10:16 PM
                                        I don't understand why they are aiming for CPU instead for DSPCoppice04/08/17 10:40 PM
                                          I don't understand why they are aiming for CPU instead for DSPCoppice04/08/17 11:32 PM
                                            I don't understand why they are aiming for CPU instead for DSPwumpus04/09/17 09:41 AM
                                          I don't understand why they are aiming for CPU instead for DSPHeikki Kultala04/09/17 09:49 PM
                                        I don't understand why they are aiming for CPU instead for DSPMichael S04/09/17 03:15 AM
                                          I don't understand why they are aiming for CPU instead for DSPanon04/09/17 07:01 AM
                                  RISC *was* science, not religionBrett04/09/17 12:16 AM
                                    RISC *was* science, not religionanon04/09/17 09:30 AM
                                      RISC *was* science, not religionMichael S04/09/17 10:04 AM
                                        RISC *was* science, not religionanon04/09/17 11:06 AM
                                        RISC *was* science, not religionBrett04/09/17 10:53 PM
                                          RISC *was* science, not religionDoug S04/10/17 02:03 PM
                                            RISC *was* science, not religionMichael_S04/11/17 10:14 AM
                                      RISC *was* science, not religionBrett04/10/17 12:01 AM
                                        RISC *was* science, not religionanon04/10/17 02:11 AM
                                          RISC *was* science, not religionDoug S04/11/17 03:31 PM
                                            RISC *was* science, not religionBrett04/11/17 10:06 PM
                                            RISC *was* science, not religionanon04/12/17 04:49 AM
                                RISC *was* science, not religionGabriele Svelto04/09/17 01:55 AM
                                  RISC *was* science, not religionMegol04/10/17 10:42 AM
                                    RISC *was* science, not religionGabriele Svelto04/10/17 02:12 PM
                                      RISC *was* science, not religionMegol04/11/17 12:23 PM
                                        RISC *was* science, not religionGabriele Svelto04/11/17 01:49 PM
                                          The Mill is not dataflowPaul A. Clayton04/12/17 04:43 AM
                                            The Mill is not dataflowAdrian04/12/17 11:21 AM
                                              Name rather than address for Mill pick-up loads?Paul A. Clayton04/12/17 07:35 PM
                                                Name rather than address for Mill pick-up loads?Adrian04/12/17 11:51 PM
                                                  Fractional bits for instruction encodingook04/13/17 01:56 AM
                                                    Fractional bits have been used for RegID encoding (NT)Paul A. Clayton04/13/17 04:04 AM
                                                    Fractional bits for instruction encodingMegol04/13/17 05:21 AM
                                                      fractional bitsRichardC04/13/17 06:20 AM
                                                        fractional bitsMegol04/15/17 06:22 AM
                                                          fractional bitsRichardC04/15/17 10:58 AM
                                                            fractional bitsAdrian04/16/17 04:08 AM
                                                              fractional bitsdmcq04/16/17 05:04 AM
                                                              fractional bitsMichael_S04/16/17 05:27 AM
                                                                The Mill spills load buffers on function callsPaul A. Clayton04/16/17 12:44 PM
                                                                  The Mill spills load buffers on function callsRichardC04/16/17 02:36 PM
                                                                    A specialized cache for spillsPaul A. Clayton04/16/17 04:52 PM
                                                                      A specialized cache for spillsRichardC04/17/17 01:16 AM
                                                                        The cycle-predictable domainRichardC04/17/17 08:29 AM
                                                                          The cycle-predictable domainMichael S04/17/17 02:35 PM
                                                                            The cycle-predictable domainRichardC04/17/17 03:01 PM
                                                                              The cycle-predictable domainMichael S04/17/17 03:37 PM
                                                                                The cycle-predictable domainRichardC04/17/17 05:25 PM
                                                                                  The cycle-predictable domainRichardC04/20/17 09:10 AM
                                                                                    The cycle-predictable domainMichael S04/21/17 05:15 AM
                                                                                      sgemm detailsRichardC04/21/17 06:09 AM
                                                                                        sgemm detailsRichardC04/21/17 09:45 AM
                                                                                          sgemm detailsRichardC04/21/17 11:27 AM
                                                                                            sgemm detailsMichael S04/22/17 10:43 AM
                                                                                        Mill "registers"Michael S04/22/17 11:45 AM
                                                                          The cycle-predictable domainJacob Marley04/17/17 09:28 PM
                                                                            The cycle-predictable domainJacob Marley04/17/17 09:28 PM
                                                                            The cycle-predictable domainMaynard Handley04/17/17 10:00 PM
                                                                            OoO window and cachesRichardC04/18/17 06:53 AM
                                                                          Mill made more sense in 2003RichardC04/18/17 02:48 PM
                                                                            Mill made more sense in 2003Megol04/18/17 03:24 PM
                                                                              Mill made more sense in 2003RichardC04/18/17 04:46 PM
                                                                                Mill made more sense in 2003Megol04/19/17 10:02 AM
                                                                                  Mill made more sense in 2003RichardC04/19/17 01:22 PM
                                                                                    Mill made more sense in 2003anon04/20/17 06:35 AM
                                                                                      Mill made more sense in 2003RichardC04/20/17 09:39 AM
                                                                                        Mill made more sense in 2003anon04/20/17 12:15 PM
                                                                                          Mill made more sense in 2003RichardC04/20/17 01:10 PM
                                                                                            Mill made more sense in 2003anon04/20/17 03:27 PM
                                                                                              Mill made more sense in 2003RichardC04/20/17 07:33 PM
                                                                                                Mill made more sense in 2003anon04/21/17 03:35 AM
                                                                                                  Mill made more sense in 2003RichardC04/21/17 05:25 AM
                                                                                                    DenverRichardC04/21/17 05:54 AM
                                                                                                      Denverdmcq04/22/17 04:57 AM
                                                                                                        DenverMichael S04/22/17 11:58 AM
                                                                                                          Denverdmcq04/22/17 12:57 PM
                                                                                                            DenverRichardC04/22/17 02:41 PM
                                                                                                              Denverdmcq04/22/17 03:35 PM
                                                                                                                Denverdmcq04/22/17 03:41 PM
                                                                                                            DenverMichael S04/22/17 03:41 PM
                                                                                                    Mill made more sense in 2003anon04/21/17 07:55 AM
                                                                                                      Mill made more sense in 2003RichardC04/21/17 08:56 AM
                                                                                                        Mill made more sense in 2003anon04/21/17 11:46 AM
                                                                                                          Mill made more sense in 2003RichardC04/21/17 02:13 PM
                                                                                                            Mill made more sense in 2003anon04/21/17 02:21 PM
                                                                                                      Mill made more sense in 2003none04/21/17 09:03 AM
                                                                                                      Mill made more sense in 2003NoSpammer04/21/17 12:40 PM
                                                                                                        Mill made more sense in 2003anon04/21/17 01:19 PM
                                                                                                        Mill made more sense in 2003Megol04/22/17 04:42 AM
                                                                                                          Mill made more sense in 2003RichardC04/22/17 11:07 AM
                                                                                              Actually, Mill scratchpad is more like 1 cycleHenry S04/21/17 02:27 PM
                                                                                            Mill made more sense in 2003Jacob Marley04/20/17 10:14 PM
                                                                                              Mill made more sense in 2003Jacob Marley04/20/17 10:14 PM
                                                                                                Mill made more sense in 2003Jacob Marley04/20/17 10:15 PM
                                                                                              OoOE processor and virtual function callsHeikki kultala04/20/17 10:59 PM
                                                                                                OoOE processor and virtual function callsJacob Marley04/21/17 01:12 AM
                                                                                                  OoOE processor and virtual function callsMichael_S04/21/17 03:04 AM
                                                                                                OoOE processor and virtual function callsRichardC04/21/17 06:26 AM
                                                                                            Mill made more sense in 2003Michael_S04/21/17 03:37 AM
                                                                                              Mill made more sense in 2003Gabriele Svelto04/22/17 03:17 PM
                                                                                        Mill is optimized for frequent callsHenry S04/21/17 02:27 AM
                                                                                          spillerRichardC04/21/17 07:53 AM
                                                                                            spiller documentationRichardC04/21/17 08:04 AM
                                                                                            spillerSymmetry04/21/17 08:47 AM
                                                                                              spillerSymmetry04/21/17 08:51 AM
                                                                                        Mill made more sense in 2003wumpus04/21/17 07:59 AM
                                                                                  Mill made more sense in 2003wumpus04/20/17 07:58 AM
                                                                              Mill made more sense in 2003anon04/18/17 08:02 PM
                                                                          virtual method callsRichardC04/19/17 08:50 AM
                                                                fractional bitsrwessel04/17/17 02:14 AM
                                                                  fractional bitsMichael S04/17/17 12:50 PM
                                                                    fractional bitsEugene Nalimov04/17/17 08:25 PM
                                                              fractional bitsMegol04/16/17 03:05 PM
                                                                fractional bitsdmcq04/17/17 03:04 AM
                                                                  fractional bitsGabriele Svelto04/17/17 10:09 AM
                                                                    fractional bitsMaynard Handley04/17/17 11:53 AM
                                                                      fractional bitsanon04/17/17 02:29 PM
                                                                Excellent exampleHenry S04/21/17 02:02 PM
                                                              fractional bitsanon04/16/17 05:31 PM
                                                                OoO instruction windowPaul A. Clayton04/17/17 06:43 PM
                                                                  OoO instruction windowanon04/17/17 07:57 PM
                                                                    OoO instruction windowMaynard Handley04/17/17 10:16 PM
                                                                      OoO instruction windowanon04/18/17 02:51 AM
                                                                        OoO instruction windowwumpus04/19/17 07:16 AM
                                                                    Initiating post-return loads earlyPaul A. Clayton04/18/17 08:39 AM
                                                                      Initiating post-return loads earlyanon04/18/17 06:28 PM
                                                                        Software assisted prefetchingPaul A. Clayton04/18/17 08:13 PM
                                                                          Software assisted prefetchingMaynard Handley04/18/17 10:04 PM
                                                                            Software assisted prefetchingMichael S04/19/17 01:49 AM
                                                              fractional bitsUngo04/17/17 08:03 PM
                                                            fractional bitsMegol04/16/17 02:33 PM
                                                              fractional bitsRichardC04/16/17 02:43 PM
                                                          fractional bitsBrett04/15/17 12:48 PM
                                                            RISC warsMichael S04/15/17 01:04 PM
                                                              RISC warsBrett04/15/17 04:18 PM
                                                                RISC warsdmcq04/16/17 04:36 AM
                                                                  RISC warsBrett04/16/17 03:02 PM
                                                                    RISC warsMaynard Handley04/16/17 05:48 PM
                                                                      RISC warsBrett04/16/17 07:56 PM
                                                                        RISC warsMaynard Handley04/16/17 09:45 PM
                                                                          RISC warsBrett04/17/17 01:51 AM
                                                                      RISC warsSimon Farnsworth04/17/17 05:51 AM
                                                                        RISC warsdmcq04/17/17 06:24 AM
                                                                          RISC warsBrett04/22/17 02:36 PM
                                                                            RISC warsMaynard Handley04/22/17 03:14 PM
                                                                              RISC warsBrett04/22/17 05:54 PM
                                                                                RISC warsMaynard Handley04/22/17 09:17 PM
                                                                    RISC warsdmcq04/17/17 02:55 AM
                                                    Fractional bits for instruction encodingdmcq04/13/17 06:35 AM
                                                      Sounds like a FP counter with random rounding (NT)Paul A. Clayton04/13/17 07:08 PM
                                                        Sounds like a FP counter with random roundingdmcq04/14/17 12:35 PM
                                          RISC *was* science, not religionMegol04/12/17 03:13 PM
                                            Mill load buffer and spillPaul A. Clayton04/12/17 07:02 PM
                              RISC *was* science, not religionMichael S04/09/17 03:51 AM
                                RISC *was* science, not religionanon04/09/17 08:30 AM
                  ARM vs RISC religionHeikki Kultala04/04/17 07:58 AM
                    religious vs atheist or SF Bay Area vs Rest of the World (NT)Michael S04/04/17 08:25 AM
                    ARM vs RISC religionRichardC04/04/17 08:44 AM
                      ARM vs RISC religionEtienne04/04/17 09:22 AM
                        ARM vs RISC religionRichardC04/04/17 09:39 AM
                          ARM vs RISC religionExophase04/04/17 07:54 PM
                            that's a neat trick! (NT)RichardC04/04/17 08:34 PM
                    ARM vs RISC religiondmcq04/04/17 09:37 AM
                    ARM vs RISC religionwumpus04/05/17 07:14 AM
                  RISC *was* science, not religionIreland04/04/17 09:14 AM
                    RISC *was* science, not religionIreland04/04/17 03:12 PM
                      RISC *was* science, not religionIreland04/04/17 03:14 PM
                  RISC *was* science, not religionLinus Torvalds04/04/17 11:10 AM
                    RISC *was* science, not religionMichael S04/04/17 11:24 AM
                      RISC *was* science, not religionExophase04/04/17 10:05 PM
                        RISC *was* science, not religionMichael S04/05/17 01:58 AM
                          RISC *was* science, not religionExophase04/05/17 11:07 AM
                            RISC *was* science, not religionMichael S04/05/17 03:38 PM
                          Load delay slot new value after cache missPaul A. Clayton04/06/17 10:29 AM
                            Load delay slot new value after cache missExophase04/06/17 03:05 PM
                      unspcified behaviour load delay slot pessimalityHeikki Kultala04/04/17 11:14 PM
                      RISC *was* science, not religionSimon Farnsworth04/06/17 05:18 AM
                        RISC *was* science, not religionRichardC04/06/17 09:54 AM
                          RISC *was* science, not religionSimon Farnsworth04/06/17 11:51 AM
                        RISC *was* science, not religiondmcq04/06/17 03:55 PM
                          RISC *was* science, not religionEtienne04/07/17 04:36 AM
                    RISC *was* science, not religionRichardC04/04/17 11:58 AM
                      RISC *was* science, not religionIreland04/04/17 03:20 PM
                      RISC *was* science, not religionIreland04/04/17 03:40 PM
                        RISC *was* science, not religionbakaneko04/05/17 12:52 AM
                          RISC *was* science, not religionIreland04/05/17 01:04 PM
                      RISC *was* science, not religiongallier204/05/17 05:06 AM
                        RISC *was* science, not religionRichardC04/05/17 09:14 AM
                          RISC *was* science, not religionSimon Farnsworth04/05/17 11:01 AM
                          RISC *was* science, not religionSeni04/05/17 12:26 PM
                          RISC *was* science, not religionDavid Hess04/05/17 11:36 PM
                            RISC *was* science, not religionRichardC04/06/17 12:32 PM
                              RISC *was* science, not religionExophase04/06/17 03:07 PM
                                RISC *was* science, not religionLinus Torvalds04/06/17 03:27 PM
                                  Intel x86 registers to the rescue!Mark Roulo04/06/17 03:45 PM
                                    Intel x86 registers to the rescue!Linus Torvalds04/06/17 04:25 PM
                                      Intel x86 registers to the rescue!John Yates04/06/17 05:51 PM
                                      Intel x86 registers to the rescue!David Hess04/08/17 06:49 AM
                                        Intel x86 registers to the rescue!Ireland04/08/17 04:47 PM
                                          Intel x86 registers to the rescue!wumpus04/08/17 06:51 PM
                                            Intel x86 registers to the rescue!David Hess04/09/17 03:57 PM
                                        Memory laneJohn Yates04/11/17 02:24 PM
                                          Memory lanesomeone04/12/17 06:27 AM
                                            Memory laneJohn Yates04/12/17 03:01 PM
                                          Memory laneIreland04/12/17 11:23 AM
                                    Intel x86 registers to the rescue!dmcq04/07/17 12:47 AM
                              RISC *was* science, not religionDavid Hess04/08/17 06:16 AM
                          RISC *was* science, not religiongallier204/05/17 11:49 PM
                            6502 = accumulator machine (NT)Wilco04/06/17 03:22 AM
                          RISC *was* science, not religiongallier204/06/17 12:12 AM
                            same difference ...RichardC04/06/17 12:57 PM
                    RISC *was* science, not religionRonald Maas04/04/17 09:04 PM
                      RISC *was* science, not religiondmcq04/05/17 12:03 PM
                        RISC *was* science, not religionAdrian04/05/17 02:24 PM
                      RISC *was* science, not religiongallier204/06/17 12:33 AM
                        RISC *was* science, not religionRonald Maas04/08/17 09:07 AM
                    RISC *was* science, not religionJohn Yates04/05/17 03:39 PM
                      RISC *was* science, not religionRichardC04/07/17 03:30 PM
                        RISC *was* science, not religionwumpus04/08/17 08:41 AM
                          RISC *was* science, not religionLinus Torvalds04/08/17 11:43 AM
                            RISC *was* science, not religionanon04/08/17 08:53 PM
                              RISC *was* science, not religionLinus Torvalds04/09/17 08:52 AM
                            VAX/VMS compatibilityRichardC04/09/17 07:54 AM
                              VAX/VMS compatibilityIreland04/09/17 08:19 AM
                              VAX/VMS compatibilityMichael S04/09/17 08:20 AM
                                VAX/VMS compatibilityRichardC04/09/17 08:32 AM
                                  VAX/VMS compatibilitydmcq04/09/17 08:47 AM
                                    I suppose, you are only familiar with British mainfraimes (NT)Michael S04/09/17 08:55 AM
                                      I suppose, you are only familiar with British mainfraimesdmcq04/09/17 05:12 PM
                                    VAX/VMS compatibilityIreland04/09/17 09:08 AM
                                    VAX/VMS compatibilityrwessel04/09/17 09:51 AM
                                      VAX/VMS compatibilityIreland04/09/17 12:35 PM
                                        VAX/VMS compatibilityanon04/09/17 06:24 PM
                                          VAX/VMS compatibilityIreland04/09/17 06:47 PM
                                            VAX/VMS compatibilityanon04/09/17 07:29 PM
                                              VAX/VMS compatibilityIreland04/09/17 07:43 PM
                                              Ireland = AI botanonymou504/10/17 05:21 AM
                                                That joke is getting old (NT)Anon04/11/17 01:23 AM
                                                  It isn't 100% a joke.Mark Roulo04/11/17 07:13 AM
                                                    It isn't 100% a joke.Michael_S04/11/17 10:19 AM
                                                      It isn't 100% a joke.Ireland04/11/17 10:48 AM
                                                      It isn't 100% a joke.anonymou504/12/17 09:40 PM
                                                    It isn't 100% a joke.Dan Downs04/11/17 04:05 PM
                                                      Shaka, when the walls fell (NT)Darmok04/12/17 12:19 AM
                                                      It isn't 100% a joke.Brendan04/13/17 05:34 AM
                                                        Can Someone Fix "Greater Than/Less Than" Handling Bugs??Brendan04/13/17 05:38 AM
                                                          6th decadeMichael S04/13/17 06:34 AM
                                                            6th decadeIreland04/13/17 10:17 AM
                                                        It isn't 100% a joke.Gabriele Svelto04/15/17 08:14 AM
                                                          It isn't 100% a joke.dmcq04/16/17 05:09 AM
                                                            It isn't 100% a joke.Brendan04/16/17 03:01 PM
                                                              The less loquacious left it alone (NT)Anon04/18/17 12:49 AM
                                                To Wit, many here..John H04/12/17 11:40 AM
                                                  To Wit, many here..Ireland04/12/17 11:54 AM
                                      VAX/VMS compatibilitydmcq04/09/17 05:02 PM
                                        VAX/VMS compatibilityIreland04/09/17 05:19 PM
                                        VAX/VMS compatibilityrwessel04/09/17 10:20 PM
                                          VAX/VMS compatibilitywumpus04/10/17 06:14 AM
                                            VAX/VMS compatibilityrwessel04/10/17 08:10 AM
                                            VAX/VMS compatibilitydmcq04/10/17 10:11 AM
                                          VAX/VMS compatibilityJohn Yates04/12/17 07:42 PM
                                            VAX/VMS compatibilityrwessel04/12/17 09:19 PM
                                    VAX/VMS compatibilityJohn Yates04/12/17 09:41 PM
                                      VAX/VMS development - thank you, JohnMichael S04/13/17 04:54 AM
                                        VAX/VMS development - thank you, JohnRob Thorpe04/14/17 08:19 AM
                                          VAX/VMS development - thank you, JohnJohn Yates04/14/17 04:20 PM
                                      VAX/VMS compatibilitydmcq04/13/17 06:23 AM
                        RISC *was* science, not religionanon04/08/17 11:04 AM
                          RISC *was* science, not religionIreland04/08/17 12:01 PM
                          RISC *was* science, not religionwumpus04/08/17 05:57 PM
                            RISC *was* science, not religionanon04/09/17 10:49 AM
                          RISC *was* science, not religionRicardo B04/09/17 04:15 PM
                            RISC *was* science, not religionanon04/09/17 11:07 PM
                              RISC *was* science, not religionRicardo B04/10/17 02:17 AM
                                RISC *was* science, not religionanon04/10/17 09:01 AM
                                  RISC *was* science, not religionRicardo B04/10/17 11:27 AM
                                    RISC *was* science, not religionanon04/10/17 03:25 PM
                                      RISC *was* science, not religionRicardo B04/10/17 05:12 PM
                                        RISC *was* science, not religionanon.104/10/17 10:54 PM
                                          RISC *was* science, not religionRicardo B04/11/17 03:14 AM
                                            RISC *was* science, not religiondmcq04/11/17 03:44 AM
                                            RISC *was* science, not religionanon.104/11/17 09:03 AM
                                              RISC *was* science, not religionWilco04/11/17 02:04 PM
                                                RISC *was* science, not religionanon04/11/17 09:07 PM
                                              RISC *was* science, not religionRicardo B04/11/17 02:15 PM
                                                RISC *was* science, not religionrwessel04/11/17 05:38 PM
                                                RISC *was* science, not religionanon04/11/17 08:36 PM
                                                  RISC *was* science, not religionRicardo B04/12/17 02:01 AM
                                                  RISC *was* science, not religionGabriele Svelto04/12/17 02:38 AM
                                                  RISC *was* science, not religionTravis04/12/17 12:20 PM
                                                RISC *was* science, not religionanon.104/11/17 10:54 PM
                                                  RISC *was* science, not religionRicardo B04/12/17 01:52 AM
                                                  RISC *was* science, not religiondmcq04/12/17 04:27 AM
                                                    RISC *was* science, not religionanon.104/12/17 08:43 AM
                                                      RISC *was* science, not religionanon.104/12/17 11:03 AM
                                              RISC *was* science, not religionMichael S04/11/17 02:32 PM
                                                RISC *was* science, not religionanon.104/11/17 10:45 PM
                                                  RISC *was* science, not religionMichael S04/12/17 10:07 AM
                                                RISC *was* science, not religiongpd04/12/17 02:31 AM
                                                  RISC *was* science, not religionTravis04/12/17 11:16 AM
                                                    RISC *was* science, not religionMichael S04/12/17 11:27 AM
                                                      RISC *was* science, not religionTravis04/12/17 12:02 PM
                                                        RISC *was* science, not religionMichael S04/12/17 12:46 PM
                                                          RISC *was* science, not religionTravis04/12/17 03:41 PM
                                                RISC *was* science, not religionTravis04/12/17 11:33 AM
                                                  RISC *was* science, not religionMichael S04/12/17 12:56 PM
                                                    RISC *was* science, not religionTravis04/12/17 04:22 PM
                                            RISC *was* science, not religionMichael S04/11/17 12:08 PM
                                        RISC *was* science, not religionanon04/11/17 02:10 AM
                                          RISC *was* science, not religionRicardo B04/11/17 03:28 AM
                                            RISC *was* science, not religionanon04/11/17 04:46 AM
                                              RISC *was* science, not religionmatthew04/11/17 08:59 AM
                                                RISC *was* science, not religionanon04/11/17 01:28 PM
                                        RISC *was* science, not religionMichael S04/11/17 11:41 AM
                                    RISC *was* science, not religionanon.104/10/17 08:03 PM
                                      RISC *was* science, not religionRicardo B04/11/17 03:47 AM
              RISC *was* science, not religionbakaneko04/03/17 11:45 PM
                RISC *was* science, not religionMichael S04/04/17 01:45 AM
                  RISC *was* science, not religionIreland04/04/17 09:30 AM
                  RISC *was* science, not religiondmcq04/04/17 09:43 AM
              RISC *was* science, not religionDavid Hess04/05/17 02:18 AM
                RISC *was* science, not religionMichael S04/05/17 04:02 AM
            RISC *was* science, not religionDavid Hess04/05/17 01:54 AM
              RISC *was* science, not religionRichardC04/05/17 04:31 AM
                ARM solution and MIPS condition evaluation?Heikki Kultala04/05/17 05:23 AM
                  ARM solution and MIPS condition evaluation?dmcq04/05/17 07:34 AM
                    MIPS condition evaluation?Heikki Kultala04/05/17 08:28 AM
                      MIPS condition evaluation?Michael S04/05/17 10:28 AM
                        MIPS condition evaluation?Heikki Kultala04/05/17 10:55 AM
                          MIPS condition evaluation?Michael S04/05/17 12:12 PM
                            MIPS condition evaluation?Heikki Kultala04/05/17 12:54 PM
                              MIPS condition evaluation?dmcq04/05/17 01:02 PM
                              MIPS condition evaluation?Heikki Kultala04/05/17 01:03 PM
                  ARM solution and MIPS condition evaluation?RichardC04/05/17 09:18 AM
                    ARM solution and MIPS condition evaluation?Linus Torvalds04/05/17 11:20 AM
                      ARM solution and MIPS condition evaluation?RichardC04/05/17 01:23 PM
                        ARM solution and MIPS condition evaluation?Linus Torvalds04/05/17 05:51 PM
                          ARM solution and MIPS condition evaluation?RichardC04/05/17 09:06 PM
                            TransputerRichardC04/06/17 05:20 AM
                            ARM solution and MIPS condition evaluation?Linus Torvalds04/06/17 08:54 AM
                              ARM solution and MIPS condition evaluation?RichardC04/06/17 11:14 AM
                                ARM solution and MIPS condition evaluation?Linus Torvalds04/06/17 11:40 AM
                                  ARM solution and MIPS condition evaluation?RichardC04/06/17 12:01 PM
                                    your theoryRichardC04/06/17 01:49 PM
                                      your theoryLinus Torvalds04/06/17 02:39 PM
                                        your theoryLinus Torvalds04/06/17 03:04 PM
                                          your theoryIreland04/06/17 03:48 PM
                                            Integrators of RISC cpu's interested only in software app salesIreland04/06/17 05:11 PM
                                          cheap machines with GUIsRichardC04/07/17 04:40 AM
                                            compatibility and evolutionary strategyRichardC04/07/17 06:27 AM
                                              68K clones?Michael S04/07/17 06:40 AM
                                                68K clones?Yuhong Bao04/07/17 07:54 AM
                                                Apollo core ...Mark Roulo04/07/17 10:28 AM
                                                68K clones?Ronald Maas04/07/17 06:07 PM
                                                68K clones?Per Hesselgren04/08/17 01:05 AM
                                                  68K clones?Per Hesselgren04/08/17 01:06 AM
                                                    68K clones?Michael S04/08/17 12:10 PM
                                              compatibility and evolutionary strategyIreland04/07/17 09:33 AM
                                              compatibility and evolutionary strategyIreland04/07/17 09:50 AM
                                                high-margin productsRichardC04/07/17 10:16 AM
                                                  high-margin productsIreland04/07/17 02:53 PM
                                                    high-margin productswumpus04/08/17 07:45 PM
                                                      high-margin productsRichardC04/09/17 06:06 AM
                                                        high-margin productsMichael S04/09/17 06:26 AM
                                                          high-margin productsIreland04/09/17 07:13 AM
                                                            high-margin productswumpus04/09/17 10:01 AM
                                                          user-visible ISA's still evolvingRichardC04/09/17 08:09 AM
                                                            user-visible ISA's still evolvingIreland04/09/17 03:08 PM
                                                      Economics and doing a MIPS, SGI or 3dfx startup today . . . Ireland04/09/17 08:08 AM
                                                        Economics and doing a MIPS, SGI or 3dfx startup today . . . bakaneko04/09/17 10:45 AM
                                                          Economics and doing a MIPS, SGI or 3dfx startup today . . . Ireland04/09/17 01:32 PM
                                        your theoryRichardC04/06/17 04:57 PM
                                          your theoryIreland04/06/17 05:29 PM
                                            your theoryIreland04/06/17 05:45 PM
                                          x86 ISA license historyRichardC04/06/17 05:31 PM
                                            x86 ISA license historywumpus04/07/17 07:35 AM
                                              x86 ISA license historyRichardC04/07/17 09:26 AM
                                          370 on 68KMatt Sayler04/06/17 05:38 PM
                                            370 on 68KDavid Hess04/08/17 10:18 AM
                                          your theoryLinus Torvalds04/06/17 07:20 PM
                                            your theoryRichardC04/06/17 08:34 PM
                                              Intel's clone warsRichardC04/06/17 08:42 PM
                                              your theoryIreland04/07/17 09:05 AM
                                            your theoryrwessel04/06/17 10:53 PM
                                            your theorygallier204/07/17 02:13 AM
                                            your theorygallier204/07/17 02:37 AM
                                              your theoryMichael S04/07/17 05:54 AM
                                                your theorygallier204/07/17 09:57 AM
                                              your theoryDavid Hess04/08/17 10:26 AM
                                                your theoryYuhong Bao04/08/17 10:28 AM
                                                your theorygallier204/09/17 05:38 AM
                                                  your theoryMichael S04/09/17 06:08 AM
                                                    your theoryrwessel04/09/17 10:04 AM
                                                      your theoryDavid Hess04/09/17 04:46 PM
                                                        your theoryrwessel04/09/17 08:58 PM
                                                  your theoryDavid Hess04/09/17 04:23 PM
                                                your theoryRichardC04/09/17 08:16 AM
                                                  your theoryDavid Hess04/09/17 04:58 PM
                                            Positive point about 80286Michael S04/07/17 06:31 AM
                                              Positive point about 80286gallier204/07/17 10:00 AM
                                                Positive point about 80286Yuhong Bao04/07/17 02:43 PM
                                                  Positive point about 80286Per Hesselgren04/08/17 01:16 AM
                                                Positive point about 80286David Hess04/08/17 10:49 AM
                                                  Positive point about 80286gallier204/09/17 05:44 AM
                                                    Positive point about 80286Ireland04/09/17 06:35 AM
                                                      Positive point about 80286gallier204/09/17 07:18 AM
                                                        Positive point about 80286Ireland04/09/17 07:30 AM
                                                          Positive point about 80286gallier204/09/17 10:43 AM
                                                            Positive point about 80286David Hess04/09/17 05:19 PM
                                                              Positive point about 80286Ireland04/09/17 05:24 PM
                                                                Positive point about 80286David Hess04/09/17 06:01 PM
                                                                  Positive point about 80286Ireland04/09/17 06:15 PM
                                                              Positive point about 80286 and MotorolaPer Hesselgren04/10/17 12:22 AM
                                                                Positive point about 80286 and MotorolaPer Hesselgren04/10/17 01:01 AM
                                                                  Positive point about 80286 and MotorolaPer Hesselgren04/10/17 01:39 PM
                                                                    Positive point about 80286 and MotorolaPer Hesselgren04/18/17 09:14 AM
                                                              Positive point about 80286gallier204/10/17 12:26 AM
                                                                Positive point about 80286Michael_S04/10/17 03:21 AM
                                                        Positive point about 80286David Hess04/09/17 05:11 PM
                                                          Positive point about 80286gallier204/10/17 01:15 AM
                                                            Positive point about 80286gallier204/10/17 01:20 AM
                                                    Positive point about 80286rwessel04/09/17 10:12 AM
                                                      Positive point about 80286gallier204/09/17 11:38 AM
                                                        Positive point about 80286Ireland04/09/17 12:17 PM
                                                          Positive point about 80286David Hess04/09/17 05:40 PM
                                                            Positive point about 80286Ireland04/09/17 05:48 PM
                                                          Positive point about 80286rwessel04/09/17 11:05 PM
                                                            Positive point about 80286wumpus04/10/17 06:31 AM
                                                              Positive point about 80286rwessel04/10/17 07:37 AM
                                                                Positive point about 80286David Hess04/10/17 09:53 AM
                                                        Positive point about 80286David Hess04/09/17 05:51 PM
                                                          Positive point about 80286wumpus04/11/17 06:41 AM
                                                            Positive point about 80286gallier204/12/17 04:20 AM
                                                          Positive point about 80286Yuhong Bao04/17/17 01:14 AM
                                                            Positive point about 80286David Hess04/17/17 02:37 AM
                                                              Positive point about 80286Joe Hodge04/17/17 06:54 PM
                                                    Positive point about 80286David Hess04/09/17 05:05 PM
                                                      Positive point about 80286Ireland04/09/17 05:13 PM
                                                        Positive point about 80286wumpus04/09/17 05:22 PM
                                                          Positive point about 80286Ireland04/09/17 05:43 PM
                                                            Positive point about 80286Ireland04/09/17 05:59 PM
                                                  Positive point about 80286wumpus04/09/17 05:17 PM
                                                    Positive point about 80286Ireland04/09/17 05:20 PM
                                        your theorydmcq04/07/17 01:04 AM
                                        your theoryGabriele Svelto04/09/17 01:47 PM
                                          your theoryIreland04/09/17 05:53 PM
                                          your theoryrwessel04/09/17 11:24 PM
                                  ARM solution and MIPS condition evaluation?Doug S04/07/17 11:24 AM
                                    ARM solution and MIPS condition evaluation?Linus Torvalds04/07/17 11:50 AM
                                      ARM solution and MIPS condition evaluation?Doug S04/10/17 09:58 PM
                                ARM solution and MIPS condition evaluation?Tim McCaffrey04/06/17 06:32 PM
                          ARM solution and MIPS condition evaluation?Doug S04/05/17 11:58 PM
                            Are you sure about orders of magnitude? (NT)Michael S04/06/17 03:24 AM
                        ARM solution and MIPS condition evaluation?Tim McCaffrey04/06/17 06:21 PM
                      ARM solution and MIPS condition evaluation?somebody04/06/17 09:41 AM
                        ARM solution and MIPS condition evaluation?Linus Torvalds04/06/17 12:01 PM
                          ARM solution and MIPS condition evaluation?Wilco04/06/17 07:17 PM
                            ARM solution and MIPS condition evaluation?Linus Torvalds04/07/17 11:35 AM
                              ARM solution and MIPS condition evaluation?Linus Torvalds04/07/17 12:20 PM
                              ARM solution and MIPS condition evaluation?Exophase04/07/17 01:22 PM
                                ARM solution and MIPS condition evaluation?Linus Torvalds04/08/17 01:32 AM
                                  Software FP vs trap emulationWilco04/08/17 05:20 AM
                                    Software FP vs trap emulationRonald Maas04/08/17 08:45 AM
                                      Software FP vs trap emulationdmcq04/08/17 10:29 AM
                                        Software FP vs trap emulationdmcq04/08/17 10:44 AM
                                          Software FP vs trap emulationWilco04/08/17 05:24 PM
                                        Software FP vs trap emulationLinus Torvalds04/08/17 10:52 AM
                                          Software FP vs trap emulationIreland04/08/17 11:46 AM
                                          Software FP vs trap emulationMichael S04/08/17 01:23 PM
                                            Software FP vs trap emulationLinus Torvalds04/08/17 03:38 PM
                                              Software FP vs trap emulationMichael S04/08/17 04:23 PM
                                          Software FP vs trap emulation@04/08/17 06:17 PM
                                            Software FP vs trap emulationLinus Torvalds04/09/17 08:59 AM
                                              Software FP vs trap emulationIreland04/09/17 09:20 AM
                                                Software FP vs trap emulationIreland04/09/17 09:35 AM
                                                Software FP vs trap emulationrwessel04/09/17 10:27 AM
                                                  Software FP vs trap emulationIreland04/09/17 01:49 PM
                                              Software FP vs trap emulation@04/09/17 11:59 AM
                                    Software FP vs trap emulationMichael S04/08/17 12:46 PM
                                      Software FP vs trap emulationWilco04/08/17 05:01 PM
                                        Software FP vs trap emulationBrett04/08/17 11:30 PM
                                          Software FP vs trap emulationmatthew04/09/17 01:14 AM
                                            Software FP vs trap emulationWilco04/09/17 07:10 AM
                                  Acorn vs DECRichardC04/09/17 08:27 AM
                                  ARM solution and MIPS condition evaluation?Exophase04/09/17 01:02 PM
                                    ARM solution and MIPS condition evaluation?Wilco04/09/17 02:52 PM
                                      ARM solution and MIPS condition evaluation?Exophase04/09/17 06:16 PM
                                        ARM solution and MIPS condition evaluation?Wilco04/10/17 01:40 AM
                                          ARM solution and MIPS condition evaluation?Exophase04/10/17 01:00 PM
                                            ARM solution and MIPS condition evaluation?Wilco04/10/17 04:19 PM
                              ARM solution and MIPS condition evaluation?Ireland04/07/17 05:34 PM
                RISC *was* science, not religionDavid Hess04/06/17 12:24 AM
                  RISC *was* science, not religionIreland04/06/17 09:54 AM
              RISC *was* science, not religionIreland04/05/17 01:23 PM
            CISC religion?wumpus04/08/17 09:49 AM
              CISC religion?Ireland04/08/17 01:24 PM
              CISC religion?Ireland04/08/17 01:39 PM
                Alan Turing Ireland04/08/17 05:31 PM
                  Alan Turing rwessel04/08/17 09:52 PM
                    Alan Turing Ireland04/09/17 05:35 AM
                CISC religion?wumpus04/08/17 07:19 PM
                  narrow vs wide skillsetsRichardC04/08/17 07:42 PM
                  CISC religion?rwessel04/08/17 09:33 PM
                    CISC religion?wumpus04/09/17 05:10 PM
                      CISC religion?David Hess04/09/17 07:56 PM
                        CISC religion?rwessel04/10/17 12:25 AM
              CISC religion?RichardC04/08/17 03:44 PM
                CISC religion?Michael S04/08/17 04:47 PM
                  CISC religion?Michael S04/08/17 04:52 PM
                    CISC religion?Ireland04/08/17 05:16 PM
                      CISC religion?Michael S04/08/17 05:26 PM
                        CISC religion?Ireland04/08/17 05:41 PM
                          CISC religion?wumpus04/08/17 08:04 PM
                            OT - faster RAMMichael S04/09/17 05:26 AM
                          CISC religion?rwessel04/08/17 10:10 PM
                            CISC religion?rwessel04/08/17 10:10 PM
                      gone parallel now ...RichardC04/08/17 07:15 PM
                CISC religion?gallier204/09/17 06:47 AM
                  fascinating link, thanks! (NT)RichardC04/09/17 09:46 AM
                CISC religion?Ricardo B04/10/17 05:55 AM
                  CISC religion?anon04/10/17 09:49 AM
                    CISC religion?Travis04/10/17 11:30 AM
                      CISC religion?Travis04/10/17 11:32 AM
                        CISC religion?anon04/10/17 02:12 PM
                          CISC religion?Travis04/10/17 07:41 PM
                            CISC religion?Michael_S04/11/17 10:44 AM
                      CISC religion?Ricardo B04/10/17 04:01 PM
                        CISC religion?Michael_S04/11/17 10:56 AM
                          CISC religion?Ricardo B04/11/17 01:27 PM
                        CISC religion?Wilco04/11/17 01:45 PM
                          CISC religion?Michael S04/11/17 02:07 PM
                          CISC religion?Ricardo B04/11/17 04:32 PM
                    CISC religion?Ricardo B04/10/17 04:24 PM
                  CISC religion?dmcq04/10/17 02:17 PM
                    CISC religion?Ricardo B04/10/17 05:16 PM
              CISC religion?Seni04/09/17 04:06 AM
                CISC religion?Ireland04/09/17 05:40 AM
                  CISC religion?wumpus04/09/17 10:08 AM
                yes, except ARM and SPARC lacked cacheRichardC04/09/17 05:50 AM
                  yes, except ARM and SPARC lacked cacheSeni04/09/17 06:19 AM
                    yes, except ARM and SPARC lacked cacheRichardC04/09/17 08:47 AM
                      minimal microcodeRichardC04/09/17 09:33 AM
                        minimal microcodeSeni04/09/17 10:02 AM
                          interesting, that makes sense (NT)RichardC04/09/17 02:45 PM
                      yes, except ARM and SPARC lacked cacheanon04/09/17 08:57 PM
                        yes, except ARM and SPARC lacked cacheRichardC04/10/17 06:18 AM
                          yes, except ARM and SPARC lacked cacheSeni04/10/17 03:51 PM
                            yes, except ARM and SPARC lacked cacheWilco04/11/17 02:56 AM
                              yes, except ARM and SPARC lacked cachedmcq04/11/17 03:06 AM
                                no, ARM's 42 rows x 36 bits = 189 bytes (NT)RichardC04/11/17 08:11 AM
                                  no, ARM's 42 rows x 36 bits = 189 bytesdmcq04/12/17 04:42 AM
                              yes, except ARM and SPARC lacked cacheSeni04/11/17 12:27 PM
                                yes, except ARM and SPARC lacked cacherwessel04/11/17 06:02 PM
                                  yes, except ARM and SPARC lacked cacheSeni04/11/17 10:27 PM
                                    yes, except ARM and SPARC lacked cacheRichardC04/12/17 11:06 AM
                                      yes, except ARM and SPARC lacked cacheSeni04/12/17 12:47 PM
                                        yes, except ARM and SPARC lacked cacheWilco04/12/17 01:38 PM
                                        not the normal usageRichardC04/12/17 07:58 PM
                                        yes, except ARM and SPARC lacked cacherwessel04/12/17 09:40 PM
                                    yes, except ARM and SPARC lacked cachedmcq04/12/17 02:19 PM
                                      yes, except ARM and SPARC lacked cacherwessel04/12/17 09:49 PM
                                        yes, except ARM and SPARC lacked cachedmcq04/13/17 03:44 AM
                                    yes, except ARM and SPARC lacked cacheanon04/12/17 08:06 PM
                        yes, except ARM and SPARC lacked cachewumpus04/10/17 06:37 AM
  Apple confirms that they are ditching Imagination within two yearsAnon04/03/17 02:36 AM
    Apple confirms that they are ditching Imagination within two yearsDoug S04/03/17 12:56 PM
      Or Samsung buys them, develops their own GPU, and uses the patents in the next lawsuit (NT)Anon04/03/17 01:26 PM
        Or Samsung buys them, develops their own GPU, and uses the patents in the next lawsuit Michael S04/03/17 02:33 PM
        Or ARM buys them, and gets any money they can from their IP and customersdmcq04/04/17 09:55 AM
  IMGTEC stock has crashed already.VertexMaster04/03/17 05:33 AM
    IMGTEC stock has crashed already.Andreas04/03/17 07:33 AM
      IMGTEC stock has crashed already.Exophase04/03/17 09:43 AM
    IMGTEC stock has crashed already.Doug S04/03/17 12:51 PM
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