AMD's Open64 compiler ?

Article: Bulldozer Benchmarks, What Do They Mean?
By: Megol (golem960.delete@this.gmail.com), April 9, 2011 10:49 am
Room: Moderated Discussions
Vincent Diepeveen (diep@xs4all.nl) on 4/7/11 wrote:
---------------------------
>none (none@none.com) on 4/6/11 wrote:
>---------------------------
>>Vincent Diepeveen (diep@xs4all.nl) on 4/6/11 wrote:
>>---------------------------
>>[...]
>>>A 64 x 64 giving a 128 bits output multiplication in GCC and similar linux compilers
>>>requires several dozens of instructions, whereas i was interested only in that multiplication instruction.
>>>
>>>Visual studio with intrinsic requires 10 instructions.
>>>
>>>In Assembler i'd use just 1 instruction there.
>>
>>gcc only needs one instruction too, using the right extension.
>>I guess you have to learn to properly use gcc...
>>
>>#include stdint.h
>>
>>__uint128_t p(uint64_t a, uint64_t b)
>>{
>>return (__uint128_t)a * b;
>>}
>>
>>$ gcc -O3 -S test.c
>>
>>p:
>>movq %rsi, %rax
>>mulq %rdi
>>ret
>>
>>
>
>I'm using this already you jerk, the problem is if you go do something with the
>outputs, then GCC generates zillions of nonsense instructions that are not needed.
>
Jerk? Grow up, take your medication and stop living in your little fantasy world where you dictate the reality.

Show an example where this actually happens, if you are
correct the example should be very short (if your code base requires lots of code to produce this pessimation the problem is elsewhere).

>As for GCC, I've already posted something before here on inefficiency with assembler
>output attached and clear proof of sabotage of the GCC compiler in order to keep it slow.
>
GCC doesn't have some saboteurs trying to make things slow.

>GCC isn't getting sold and therefore always will be kept slow.
>
"kept slow"... The development model for GCC is open. Nobody contributing to GCC have an interest to keep it slow and those that don't contribute have no say.
< Previous Post in ThreadNext Post in Thread >
TopicPosted ByDate
New article: Bulldozer benchmark analysisDavid Kanter2011/03/30 02:27 AM
  New article: Bulldozer benchmark analysisNaN2011/03/30 07:47 AM
    New article: Bulldozer benchmark analysisDavid Kanter2011/03/30 09:25 AM
      New article: Bulldozer benchmark analysisdc2011/03/30 12:07 PM
      New article: Bulldozer benchmark analysisFoo_2011/03/30 12:17 PM
        New article: Bulldozer benchmark analysisDavid Kanter2011/03/30 01:34 PM
          BD won't "kick in" until 2.5GHzBaronMAtrix2011/03/31 08:37 AM
            BD won't "kick in" until 2.5GHzDavid Kanter2011/03/31 09:21 AM
              He is an AMDZone lunaticNIKOLAS2011/04/01 06:40 AM
                See how he behaves hereDavid Kanter2011/04/01 08:08 AM
                He is an AMDZone lunatichorsefly2011/04/02 05:46 AM
                  This is not relevantDavid Kanter2011/04/02 09:16 AM
                  Post removedDavid Kanter2011/04/02 12:39 PM
          New article: Bulldozer benchmark analysisanonymous2011/04/04 05:08 AM
      New article: Bulldozer benchmark analysisinterested2011/04/01 03:28 PM
        New article: Bulldozer benchmark analysisDavid Kanter2011/04/01 03:53 PM
          New article: Bulldozer benchmark analysisNaN2011/04/02 07:12 AM
            New article: Bulldozer benchmark analysisDavid Kanter2011/04/02 09:05 AM
              New article: Bulldozer benchmark analysisNaN2011/04/02 09:24 AM
                New article: Bulldozer benchmark analysisDavid Kanter2011/04/02 12:36 PM
                  AMD's Open64 compiler ?Alex2011/04/04 02:23 AM
                    AMD's Open64 compiler ?David Kanter2011/04/04 08:19 AM
                      AMD's Open64 compiler ?Richard Cownie2011/04/04 09:52 AM
                        AMD's Open64 compiler ?David Kanter2011/04/04 01:20 PM
                          AMD's Open64 compiler ?none2011/04/04 02:25 PM
                        AMD's Open64 compiler ?gallier22011/04/04 11:06 PM
                          thanks, very interesting (NT)Richard Cownie2011/04/05 03:44 AM
                          AMD's Open64 compiler ?Andreas Stiller2011/04/05 08:23 AM
                        AMD's Open64 compiler ?Vincent Diepeveen2011/04/06 01:11 AM
                      AMD's Open64 compiler ?Vincent Diepeveen2011/04/06 01:01 AM
                        AMD's Open64 compiler ?none2011/04/06 01:41 AM
                          AMD's Open64 compiler ?Vincent Diepeveen2011/04/07 02:02 PM
                            AMD's Open64 compiler ?Brett2011/04/07 04:55 PM
                              AMD's Open64 compiler ?Megol2011/04/09 11:03 AM
                                Clang+LLVMBrett2011/04/11 10:51 PM
                                  Clang+LLVMRob Thorpe2011/04/12 12:52 AM
                                    Clang+LLVMBrett2011/04/12 08:27 PM
                                      I prefer my dollars exponential, not cubic (NT)David Kanter2011/04/12 11:34 PM
                                        I prefer cubic meters of euros over cubic feet of dollarsJouni Osmala2011/04/13 01:13 AM
                                          Life is not about money, but about power (and informational asymetry)?2011/04/18 01:14 AM
                                      Clang+LLVMRob Thorpe2011/04/13 10:37 AM
                                        Clang+LLVMLinus Torvalds2011/04/13 11:47 AM
                                          Clang+LLVMRob Thorpe2011/04/13 01:46 PM
                                            Clang+LLVMLinus Torvalds2011/04/13 04:40 PM
                                              Clang+LLVManon2011/04/13 07:31 PM
                                                Clang+LLVMLinus Torvalds2011/04/14 06:11 AM
                                              Clang+LLVMRob Thorpe2011/04/14 12:33 PM
                                                Clang+LLVMLinus Torvalds2011/04/14 12:48 PM
                                                  Clang+LLVMAndi Kleen2011/04/14 06:38 PM
                                                    Clang+LLVMJouni Osmala2011/04/14 09:54 PM
                                                  Clang+LLVM?2011/04/14 11:56 PM
                                                    Clang+LLVMLinus Torvalds2011/04/15 06:23 AM
                                                      Clang+LLVM?2011/04/15 10:11 PM
                                                        Clang+LLVMLinus Torvalds2011/04/16 08:10 AM
                                                          Clang+LLVMLinus Torvalds2011/04/16 08:32 AM
                                                            Competing for speed?2011/04/16 11:47 PM
                                                            Clang+LLVMEduardoS2011/04/17 12:38 PM
                                                              Clang+LLVMLinus Torvalds2011/04/17 02:00 PM
                                                                Competing for speed?2011/04/17 10:57 PM
                                                                  Competing for speedLinus Torvalds2011/04/18 09:07 AM
                                                                    Competing for speedanon2011/04/18 05:38 PM
                                                                      Competing for speedLinus Torvalds2011/04/18 07:24 PM
                                                                        Competing for speedanon2011/04/19 05:05 AM
                                                                          Competing for speedanon2011/04/21 01:35 PM
                                                                            Competing for speedLinus Torvalds2011/04/22 11:09 AM
                                                                    Competing for speed?2011/04/18 11:45 PM
                                                                      Competing for speedLinus Torvalds2011/04/19 06:41 AM
                                                                        Competing for speedLinus Torvalds2011/04/19 07:46 AM
                                                                        Oh ... the irony?2011/04/19 10:36 AM
                                                                          Oh ... the ironyLinus Torvalds2011/04/19 01:49 PM
                                                                            What's the speedup?iz2011/04/19 10:54 PM
                                                                              What's the speedup?Linus Torvalds2011/04/20 06:48 AM
                                                                            Oh ... the irony?2011/04/23 05:52 AM
                                                                          Oh ... the ironyDougal2011/04/20 06:23 AM
                                                                            Oh ... the irony?2011/04/25 12:05 PM
                                                                              Oh ... the ironyDougal2011/04/26 05:22 AM
                                                                                Oh ... the irony?2011/04/27 12:14 AM
                                                  Clang+LLVMRob Thorpe2011/04/16 01:23 PM
                                                    Clang+LLVManon2011/04/16 03:01 PM
                                                      Clang+LLVMRob Thorpe2011/04/18 04:53 AM
                                                        Clang+LLVManon2011/04/18 05:28 PM
                                        Clang+LLVMPaul2011/04/14 10:43 AM
                                  Clang+LLVMFoo_2011/04/12 05:36 AM
                              AMD's Open64 compiler ?Paul2011/04/10 02:50 AM
                                C++ front-endsDavid Kanter2011/04/10 06:29 AM
                                  C++ front-endsPaul2011/04/10 07:19 AM
                                    C++ front-endsanonymous2011/04/10 07:28 AM
                                      C++ front-endsnone2011/04/10 07:36 AM
                                      C++ front-endsPaul2011/04/10 07:44 AM
                                    C++ front-endsMichael S2011/04/10 07:47 AM
                                      C++ front-endsnone2011/04/10 07:51 AM
                                      C++ front-endsRob Thorpe2011/04/10 11:13 AM
                                        C++ front-endsPaul2011/04/11 10:07 AM
                                AMD's Open64 compiler ?Konrad Schwarz2011/04/14 01:06 AM
                              Testing Clang + LLVMVincent Diepeveen2011/04/20 06:31 AM
                                Does your program crash when compiled with -O0? (NT)Michael S2011/04/20 10:11 AM
                                  Does your program crash when compiled with -O0? (NT)Vincent Diepeveen2011/04/20 11:33 AM
                                Testing Clang + LLVMMegol2011/04/20 11:05 AM
                                  Testing Clang + LLVMVincent Diepeveen2011/04/20 11:43 AM
                                    Testing Clang + LLVMstubar2011/04/20 12:23 PM
                                      Testing Clang + LLVMVincent Diepeveen2011/04/20 12:42 PM
                                        Testing Clang + LLVMRob Thorpe2011/04/20 02:30 PM
                                          Testing Clang + LLVMahnoun2011/04/20 03:13 PM
                                            Testing Clang + LLVMMark Roulo2011/04/20 04:05 PM
                                              Testing Clang + LLVMMegol2011/04/22 04:30 AM
                                    Testing Clang + LLVMahnoun2011/04/20 02:31 PM
                                      Testing Clang + LLVMVincent Diepeveen2011/04/21 02:17 AM
                                        Testing Clang + LLVMnone2011/04/21 02:36 AM
                                        Testing Clang + LLVMahnoun2011/04/21 11:02 AM
                                          Testing Clang + LLVMMichael S2011/04/21 12:01 PM
                                            Testing Clang + LLVMMichael S2011/04/21 03:29 PM
                                              Testing Clang + LLVMBrett2011/04/21 04:49 PM
                                              Testing Clang + LLVMEduardoS2011/04/22 02:22 PM
                                                Testing Clang + LLVMMichael S2011/04/23 09:59 AM
                                            Testing Clang + LLVMDavid Ball2011/04/21 06:43 PM
                                Testing Clang + LLVMBrett2011/04/20 12:54 PM
                            AMD's Open64 compiler ?Megol2011/04/09 10:49 AM
                              Imperative compilers (and the lack of it)?2011/04/10 12:36 AM
                                Imperative compilers (and the lack of it)?2011/04/10 12:43 AM
                                Imperative compilers (and the lack of it)Paul2011/04/10 02:37 AM
                                  Imperative compilers (and the lack of it)?2011/04/10 05:30 AM
                                  Imperative compilers (and the lack of it)Vincent Diepeveen2011/04/10 06:20 AM
                                  Imperative compilers (and the lack of it)Gabriele Svelto2011/04/11 08:24 AM
                                  Imperative compilers (and the lack of it)Michael S2011/04/12 12:12 AM
                                    Imperative compilers (and the lack of it)?2011/04/12 01:41 AM
                                      Imperative compilers (and the lack of it)EduardoS2011/04/12 03:13 PM
                                        U+269BMichael S2011/04/13 12:45 AM
                                          U+269B?2011/04/13 03:52 AM
                                            U+269BBrendan2011/04/20 07:18 AM
                                              U+269BMichael S2011/04/20 09:11 AM
                                                U+269BHeath Provost2011/04/20 10:26 AM
                                                  You are right, Heath. Sorry, Brannon.Michael S2011/04/20 10:42 AM
                                                    Sorry again, Brendan (NT)Michael S2011/04/20 10:43 AM
                                                    Testing western non-us letters.Jouni Osmala2011/04/20 09:41 PM
                                                      Those show up fine to me (NT)David Kanter2011/04/21 07:48 AM
                                                      Testing western non-us letters.Heath Provost2011/04/21 11:15 AM
                                                        Testing western non-us letters.EduardoS2011/04/22 02:14 PM
                                                          Testing western non-us letters.Heath Provost2011/04/22 03:21 PM
                                                            Testing western non-us letters.EduardoS2011/04/22 04:24 PM
                                                            We actually upgraded to 2008 R2David Kanter2011/04/22 10:23 PM
                                                              We actually upgraded to 2008 R2EduardoS2011/04/22 10:33 PM
                                                                We actually upgraded to 2008 R2rwessel2011/04/22 11:11 PM
                                                                  We actually upgraded to 2008 R2David Kanter2011/04/22 11:28 PM
                                                                    We actually upgraded to 2008 R2Ricardo B2011/04/23 09:43 AM
                                                                      We actually upgraded to 2008 R2David Kanter2011/04/23 10:31 AM
                                                                    We actually upgraded to 2008 R2sparkplug2011/04/23 08:25 PM
                                                                      We actually upgraded to 2008 R2David Kanter2011/04/24 03:36 PM
                                                                        We actually upgraded to 2008 R2anon2011/04/24 06:32 PM
                                                                          We actually upgraded to 2008 R2David Kanter2011/04/24 11:12 PM
                                                                        We actually upgraded to 2008 R2EduardoS2011/04/24 08:10 PM
                                                                          We actually upgraded to 2008 R2David Kanter2011/04/24 11:04 PM
                                                                        We actually upgraded to 2008 R2anonymous2011/04/24 08:44 PM
                                                                          We actually upgraded to 2008 R2David Kanter2011/04/24 10:57 PM
                                                                        File size optimizationsjrl2011/04/25 02:03 AM
                                                                          File size optimizationsRicardo B2011/04/25 07:14 AM
                                                                            File size optimizationsjrl2011/04/25 05:52 PM
                                                                          File size optimizationsDavid Kanter2011/04/25 07:49 AM
                                                                            File size optimizationsRicardo B2011/04/25 08:22 AM
                                                                              ContinuationRicardo B2011/04/25 08:25 AM
                                                                              File size optimizationsChristian Packmann2011/04/25 09:56 AM
                                                                                File size optimizationsEduardoS2011/04/25 11:57 AM
                                                                                  File size optimizationsRicardo B2011/04/25 01:01 PM
                                                                            File size optimizationsEduardoS2011/04/25 12:01 PM
                                                                            Javascript is at the root of the latency problemjrl2011/04/25 06:03 PM
                                                                          File size optimizationsEduardoS2011/04/25 12:14 PM
                                                                            File size optimizationsrwessel2011/04/25 12:49 PM
                                                                              File size optimizationsEduardoS2011/04/25 12:57 PM
                                                                            File size optimizationsjrl2011/04/25 05:54 PM
                                                                              A simple approachSilent2011/04/25 09:24 PM
                                                                                Show Thread exists but the default is Yes (NT)Silent2011/04/25 09:26 PM
                                                                          File size optimizationsHeath Provost2011/04/25 02:02 PM
                                    Imperative compilers (and the lack of it)Azazel2011/04/12 08:23 PM
                                Imperative compilers (and the lack of it)none2011/04/10 06:00 AM
                                  Imperative compilers (and the lack of it)dmsc2011/04/10 06:39 AM
                                  Imperative compilers (and the lack of it)EduardoS2011/04/10 12:55 PM
                                compiler failure rateshobold2011/04/10 10:55 AM
                                  compiler failure rates?2011/04/10 11:13 PM
                                    compiler failure rateshobold2011/04/11 05:07 AM
                                Imperative compilers (and the lack of it)EduardoS2011/04/10 12:55 PM
                                  Imperative compilers (and the lack of it)?2011/04/10 11:13 PM
                                    Imperative compilers (and the lack of it)Konrad Schwarz2011/04/14 01:28 AM
                                      Imperative compilers (and the lack of it)gallier22011/04/14 04:47 AM
                                      Imperative compilers (and the lack of it)EduardoS2011/04/14 02:04 PM
                                        Imperative compilers (and the lack of it)Konrad Schwarz2011/04/15 03:43 AM
                                Hard register problemsRob Thorpe2011/04/11 12:14 AM
                                  Hard register problemsMax2011/04/11 03:05 PM
                                    Hard register problemsRob Thorpe2011/04/11 03:28 PM
                                Imperative compilers (and the lack of it)gallier22011/04/11 09:26 AM
                                  I wonder why.j2011/04/11 10:39 PM
                                    I wonder why.?2011/04/11 11:44 PM
                                Imperative compilers (and the lack of it)nksingh2011/04/12 11:00 PM
                                  Imperative compilers (and the lack of it)?2011/04/12 11:23 PM
                              AMD's Open64 compiler ?Vincent Diepeveen2011/04/10 06:06 AM
                                AMD's Open64 compiler ?none2011/04/10 07:23 AM
                                  AMD's Open64 compiler ?Eugene Nalimov2011/04/11 03:57 PM
                                    AMD's Open64 compiler ?EduardoS2011/04/12 02:55 PM
                                AMD's Open64 compiler ?Megol2011/04/10 11:05 PM
                                  AMD's Open64 compiler ?Vincent Diepeveen2011/04/20 12:52 PM
                                    Yap transform? What is it? (NT)Michael S2011/04/21 09:04 AM
                                      Yap transform? What is it? (NT)Vincent Diepeveen2011/04/22 02:56 AM
                    AMD's Open64 compiler ?Vincent Diepeveen2011/04/05 12:02 PM
    New article: Bulldozer benchmark analysisNaN2011/03/30 05:24 PM
      New article: Bulldozer benchmark analysisChris2011/04/05 03:33 AM
  New article: Bulldozer benchmark analysisdc2011/03/30 08:09 AM
    New article: Bulldozer benchmark analysisMS2011/03/30 08:53 AM
      New article: Bulldozer benchmark analysisDaniel Bizo2011/03/31 12:20 AM
        New article: Bulldozer benchmark analysisanun2011/03/31 02:48 AM
    New article: Bulldozer benchmark analysisAlex2011/03/30 09:18 AM
      New article: Bulldozer benchmark analysisIntelUser20002011/03/30 01:19 PM
    New article: Bulldozer benchmark analysisGroo2011/03/31 06:14 AM
      New article: Bulldozer benchmark analysisanon2011/03/31 08:29 AM
        AMD's memory controllers are fineDavid Kanter2011/03/31 09:27 AM
          AMD's memory controllers are fineanon2011/04/05 11:24 AM
            AMD's memory controllers are fineanon2011/04/05 04:52 PM
              AMD's memory controllers are fineVincent Diepeveen2011/04/06 01:36 AM
                AMD's memory controllers are fineanon2011/04/06 06:59 AM
                  AMD's memory controllers are fineVincent Diepeveen2011/04/07 02:15 PM
                    AMD's memory controllers are fineVincent Diepeveen2011/04/07 02:27 PM
                      AMD's memory controllers are fineanon2011/04/07 02:57 PM
                    AMD's memory controllers are fineanon2011/04/07 02:54 PM
        New article: Bulldozer benchmark analysisAzazel2011/03/31 09:54 AM
        New article: Bulldozer benchmark analysisAlex2011/03/31 11:38 PM
      New article: Bulldozer benchmark analysisanon2011/04/01 03:23 AM
    Streaming conflicts can lead to performance degradationsgc2011/04/08 06:35 AM
  AMD's probe filterAndreas Stiller2011/04/05 08:37 AM
  a waste of timeMoritz2011/04/09 07:01 AM
    a waste of timehorsefly2011/04/09 03:34 PM
      a waste of timeDavid Kanter2011/04/09 06:56 PM
        a waste of timehorsefly2011/04/10 05:13 AM
          InvestorsDavid Kanter2011/04/10 06:27 AM
Reply to this Topic
Name:
Email:
Topic:
Body: No Text
How do you spell tangerine? ūüćä