Alternative to Highway for code that is not SIMD width agnostic

By: Charlie Burnes (charlie.burnes.delete@this.no-spam.com), May 22, 2022 5:30 am
Room: Moderated Discussions
>> The main thing I’m struggling with is I can’t write my code in a way that is SIMD width agnostic.
> I'm curious why that is not possible?

It’s not possible because the SIMD width is mapped to a rectangle of values and a very expensive computation has to be done to compute some constants that correspond to each value in that rectangle. This expensive computation only has to be done once for a particular SIMD width but the SIMD width needs to be known to do the expensive computation because the SIMD width determines the size of the rectangle of values. Also, this expensive computation is done off-line in different software than is used for the rest of the problem. The expensive computation has to be done using arbitrary precision arithmetic and I need to test the results to make sure I implemented it correctly before I use the results in the other software. If I really wanted to make a SIMD width agnostic version, I would have to test the expensive computation on a lot of different size rectangles of values corresponding to a lot of different SIMD widths to be sure it always works. That would be too much work. It doesn’t make sense to make a whole project out of supporting arbitrary SIMD widths because that is a small part of the overall problem.

> Given that you plan to use NEON, would SVE ever come into play?

I don’t need to worry about SVE or SVE2 unless Apple includes them in the M2 and removes NEON. I doubt Apple will remove NEON because that would break existing applications. I don’t need to support RISC-V Vector extensions.

> Where does the 512 number come from?

My first target is Intel CPUs with AVX-512. I’m looking for a way to write code for AVX-512 and have some way to make the code work on a chip with AVX2 but no AVX-512. That way, I can get good performance on CPUs with AVX-512 and the code will still be useable but slower on CPUs that do not have AVX-512. The code would too slow to be usable if I use a scalar version on CPUs with only AVX2. It is OK if the AVX2 version is 2x to 3x slower than the AVX-512 version, but using a scalar version that is 16x slower is not acceptable.

> But perhaps you only care about older HW with fixed-size vectors

I understand that my code will not be able to get any additional performance from AVX-1024 if that becomes widely available at some distant point in the future. I don’t think there is anything practical I can do about that.

> it would certainly be feasible to define a Vec256x2 and Vec128x4 class that implements 512 bits using
> two/four vectors. You could copy/adapt the Highway implementations of Vec256 and Vec128, or simply
> build on top of them and define the operations you want using two/four calls to the Highway ops.

That sounds like a great idea. Thank you! I saw the HWY_EMU128 target mentioned in the Highway Implementation Details document but it sounds like you are referring to something different here. I didn’t see Vec128 or Vec256 mentioned anywhere in the Highway docs I have read so far. I did a Google search for Vec256 site:github.com/google/highway and I got no matching documents.
< Previous Post in ThreadNext Post in Thread >
TopicPosted ByDate
Apple's AVX512---2022/05/11 11:32 PM
  Apple's AVX512Rayla2022/05/12 07:23 AM
    Apple's AVX512---2022/05/12 09:49 AM
      Apple's AVX512---2022/05/12 09:59 AM
  Questions About Apple's AVX512Matt Lohmann2022/05/13 04:21 AM
    Questions About Apple's AVX512---2022/05/13 08:33 AM
      Questions About Apple's AVX512Doug S2022/05/13 09:22 AM
        Questions About Apple's AVX512---2022/05/13 01:05 PM
          Questions About Apple's AVX512Doug S2022/05/13 08:28 PM
            Questions About Apple's AVX512Anon12022/05/13 11:53 PM
            Questions About Apple's AVX512Simon Farnsworth2022/05/14 04:20 AM
              Questions About Apple's AVX512Michael S2022/05/14 11:27 AM
                Questions About Apple's AVX512Doug S2022/05/15 09:50 AM
                  Questions About Apple's AVX512Michael S2022/05/15 12:01 PM
                    Questions About Apple's AVX512Doug S2022/05/15 11:59 PM
                      Questions About Apple's AVX512Michael S2022/05/16 01:29 AM
                    what it takes to really vectorizeRichardC2022/05/16 01:47 PM
                  Questions About Apple's AVX512---2022/05/16 09:22 PM
                    Questions About Apple's AVX512rwessel2022/05/17 12:42 AM
                      Questions About Apple's AVX512anon12022/05/17 03:47 AM
                        Questions About Apple's AVX512Michael S2022/05/17 05:28 AM
                          Questions About Apple's AVX512anon12022/05/18 12:15 AM
                            Questions About Apple's AVX512-.-2022/05/18 02:41 AM
                              Questions About Apple's AVX512Jan Wassenberg2022/05/18 09:23 PM
                                Questions About Apple's AVX512-.-2022/05/19 05:11 AM
                                  Questions About Apple's AVX512Jan Wassenberg2022/05/19 05:45 AM
                                    Questions About Apple's AVX512-.-2022/05/20 03:04 AM
                                      Questions About Apple's AVX512Jan Wassenberg2022/05/20 09:00 PM
                Questions About Apple's AVX512anon12022/05/16 03:44 AM
              Questions About Apple's AVX512Jörn Engel2022/05/15 10:34 PM
                Questions About Apple's AVX512Simon Farnsworth2022/05/16 03:13 AM
                  Questions About Apple's AVX512Jörn Engel2022/05/16 11:52 AM
                    Backward Compatibility for SVE2 CodeCharlie Burnes2022/05/16 05:57 PM
                      Backward Compatibility for SVE2 CodeJörn Engel2022/05/16 11:30 PM
                        Backward Compatibility for SVE2 CodeCharlie Burnes2022/05/17 02:31 AM
                          Backward Compatibility for SVE2 CodeJörn Engel2022/05/17 09:24 AM
                            Backward Compatibility for SVE2 CodeCharlie Burnes2022/05/17 10:21 AM
                              Backward Compatibility for SVE2 CodeJörn Engel2022/05/17 01:11 PM
                                OpenMP SIMD DirectivesCharlie Burnes2022/05/17 03:05 PM
                                  OpenMP SIMD DirectivesJörn Engel2022/05/17 04:14 PM
                                    OpenMP SIMD DirectivesJan Wassenberg2022/05/20 09:12 PM
                                      OpenMP SIMD DirectivesFreddie2022/05/21 06:13 AM
                                        OpenMP SIMD DirectivesJan Wassenberg2022/05/21 09:54 PM
                                      OpenMP SIMD DirectivesJörn Engel2022/05/21 12:23 PM
                                        Alternative to Highway for code that is not SIMD width agnosticCharlie Burnes2022/05/21 09:11 PM
                                          Alternative to Highway for code that is not SIMD width agnosticJan Wassenberg2022/05/21 10:16 PM
                                            Alternative to Highway for code that is not SIMD width agnosticCharlie Burnes2022/05/22 05:30 AM
                                              Removal of NEONDoug S2022/05/22 09:57 AM
                                                Removal of NEONCharlie Burnes2022/05/22 12:12 PM
                                                Removal of NEON-.-2022/05/23 03:23 AM
                                                  Removal of NEONDoug S2022/05/23 07:08 AM
                                                    Removal of NEONdmcq2022/05/23 11:59 AM
                                                  Removal of NEONblaine2022/05/24 09:40 PM
                                              Alternative to Highway for code that is not SIMD width agnosticJan Wassenberg2022/05/22 11:06 AM
                                                Alternative to Highway for code that is not SIMD width agnosticCharlie Burnes2022/05/22 12:06 PM
                                                  Alternative to Highway for code that is not SIMD width agnosticJan Wassenberg2022/05/22 09:35 PM
                                              Alternative to Highway for code that is not SIMD width agnostic-.-2022/05/23 03:28 AM
                                          Alternative to Highway for code that is not SIMD width agnosticAdrian2022/05/22 04:04 AM
                                            Alternative to Highway for code that is not SIMD width agnosticCharlie Burnes2022/05/22 06:20 AM
                                          Alternative to Highway for code that is not SIMD width agnosticJörn Engel2022/05/22 12:13 PM
                                            Alternative to Highway for code that is not SIMD width agnosticCharlie Burnes2022/05/22 12:53 PM
                                              Alternative to Highway for code that is not SIMD width agnosticJörn Engel2022/05/22 01:49 PM
                                                Unaligned Loads and StoresCharlie Burnes2022/05/22 04:34 PM
                                                Alternative to Highway for code that is not SIMD width agnosticJan Wassenberg2022/05/22 09:46 PM
                                                  Unaligned Loads and StoresCharlie Burnes2022/05/22 11:46 PM
                                                    Unaligned Loads and StoresJan Wassenberg2022/05/23 04:34 AM
                                                  Is Highway a full compiler or yet another LLVM front-end, like icpc ? (NT)Michael S2022/05/23 12:12 AM
                                                    Is Highway a full compiler or yet another LLVM front-end, like icpc ?none2022/05/23 12:57 AM
                                                      Is Highway a full compiler or yet another LLVM front-end, like icpc ?Michael S2022/05/23 01:08 AM
                                                        Is Highway a full compiler or yet another LLVM front-end, like icpc ?Jan Wassenberg2022/05/23 04:38 AM
                                        OpenMP SIMD DirectivesJan Wassenberg2022/05/21 10:07 PM
                                          OpenMP SIMD DirectivesJörn Engel2022/05/22 12:25 PM
                                            OpenMP SIMD DirectivesJan Wassenberg2022/05/22 09:56 PM
                                              OpenMP SIMD DirectivesMichael S2022/05/23 01:32 AM
                                                OpenMP SIMD DirectivesJan Wassenberg2022/05/23 04:49 AM
                                                  OpenMP SIMD DirectivesMichael S2022/05/23 12:04 PM
                                                    OpenMP SIMD DirectivesJan Wassenberg2022/05/23 09:43 PM
                                        OpenMP SIMD Directivesanon22022/05/22 10:42 PM
                                          OpenMP SIMD DirectivesJörn Engel2022/05/22 11:11 PM
                                            OpenMP SIMD Directivesanon22022/05/22 11:47 PM
                                              TemplatesMichael S2022/05/23 01:52 AM
                                                Templatesanon22022/05/23 02:36 AM
                                                  At least use a handle unique in the thread you post in... (NT)anon22022/05/23 07:16 AM
                                              TemplatesJörn Engel2022/05/23 09:41 AM
                              Backward Compatibility for SVE2 Codeanonymou52022/05/17 01:36 PM
                                Lack of Backward Compatibility for Intel AVX512Charlie Burnes2022/05/17 02:22 PM
                                  Lack of Backward Compatibility for Intel AVX512anonymou52022/05/18 02:15 AM
                                    Lack of Backward Compatibility for Intel AVX512anon22022/05/18 02:36 AM
                                      Lack of Backward Compatibility for Intel AVX512anonymou52022/05/18 04:06 AM
                                        Lack of Backward Compatibility for Intel AVX512Michael S2022/05/18 04:36 AM
                                          Lack of Backward Compatibility for Intel AVX512me2022/05/18 04:50 AM
                                            Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/18 05:47 AM
                                              Lack of Backward Compatibility for Intel AVX512me2022/05/18 08:18 AM
                                              Lack of Backward Compatibility for Intel AVX512Doug S2022/05/18 09:26 AM
                                                Lack of Backward Compatibility for Intel AVX512Brett2022/05/18 10:03 AM
                                                  Lack of Backward Compatibility for Intel AVX512me2022/05/18 10:35 AM
                                                    Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/18 09:31 PM
                                                      Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/19 04:58 AM
                                                        Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/19 05:55 AM
                                                          Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/19 10:09 AM
                                                            Why Is AVX 512 Useful for RPCS3?-.-2022/06/15 06:04 PM
                                                              Why Is AVX 512 Useful for RPCS3?Jukka Larja2022/06/15 08:33 PM
                                                    Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/19 04:56 AM
                                                      Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/19 05:49 AM
                                                        Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/19 10:14 AM
                                                          Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/19 11:19 AM
                                                            Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/20 09:04 AM
                                                              Lack of Backward Compatibility for Intel AVX512zzyzx2022/05/20 12:48 PM
                                                                Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/20 08:48 PM
                                                                  Lack of Backward Compatibility for Intel AVX512zzyzx2022/05/21 06:44 PM
                                                                    Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/21 08:48 PM
                                                                      Lack of Backward Compatibility for Intel AVX512zzyzx2022/05/22 01:46 AM
                                                                        Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/22 04:32 AM
                                                                          Lack of Backward Compatibility for Intel AVX512zzyzx2022/05/22 03:06 PM
                                                                            Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/22 11:59 PM
                                                                              Lack of Backward Compatibility for Intel AVX512zzyzx2022/05/23 10:02 PM
                                                                                Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/24 01:33 AM
                                                                                  Lack of Backward Compatibility for Intel AVX512zzyzx2022/05/24 02:18 PM
                                                                                    Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/25 05:01 AM
                                                                                      Lack of Backward Compatibility for Intel AVX512zzyzx2022/05/25 02:02 PM
                                                      Lack of Backward Compatibility for Intel AVX512Eugene Nalimov2022/05/19 09:25 PM
                                                        Lack of Backward Compatibility for Intel AVX512Jukka Larja2022/05/20 08:34 AM
                                                  Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/18 09:40 PM
                                                    Lack of Backward Compatibility for Intel AVX512Andrey2022/05/19 08:26 AM
                                                    Lack of Backward Compatibility for Intel AVX512Brett2022/05/19 10:23 AM
                                                      Lack of Backward Compatibility for Intel AVX512Andrey2022/05/19 12:50 PM
                                                        Lack of Backward Compatibility for Intel AVX512Brett2022/05/20 10:52 PM
                                                  Lack of Backward Compatibility for Intel AVX512Adrian2022/05/18 11:22 PM
                                                  Lack of Backward Compatibility for Intel AVX512Brendan2022/05/19 03:32 AM
                                                Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/18 09:29 PM
                                                  Lack of Backward Compatibility for Intel AVX512Michael S2022/05/19 12:14 AM
                                                    Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/19 06:02 AM
                                                      Lack of Backward Compatibility for Intel AVX512Michael S2022/05/19 07:13 AM
                                                        Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/20 12:34 AM
                                                          Lack of Backward Compatibility for Intel AVX512Michael S2022/05/20 01:48 AM
                                                          OT Documentation on JPEG XL - site certificate brokenMichael S2022/05/20 02:17 AM
                                                            OT Documentation on JPEG XL - site certificate brokenJan Wassenberg2022/05/20 09:18 PM
                                                    Lack of Backward Compatibility for Intel AVX512-.-2022/05/20 02:55 AM
                                                      Lack of Backward Compatibility for Intel AVX512Michael S2022/05/20 04:51 AM
                                                        Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/20 09:54 PM
                                                          Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/20 09:57 PM
                                                            Lack of Backward Compatibility for Intel AVX512Michael S2022/05/21 09:57 AM
                                                              Lack of Backward Compatibility for Intel AVX512---2022/05/21 05:59 PM
                                                                Adding instructions to NEON??Doug S2022/05/22 10:01 AM
                                                                  Adding instructions to NEON??---2022/05/22 12:59 PM
                                                                    Adding instructions to NEON??Doug S2022/05/22 07:46 PM
                                                                      Adding instructions to NEON??Michael S2022/05/23 12:04 AM
                                                                        Adding instructions to NEON??anonymou52022/05/24 03:02 PM
                                                                      Adding instructions to NEON??Ungo2022/05/23 01:05 AM
                                                                        Adding instructions to NEON??---2022/05/23 05:49 AM
                                                                          Adding instructions to NEON??Ungo2022/05/23 08:01 PM
                                                                            Adding instructions to NEON??---2022/05/24 09:26 AM
                                                                      Adding instructions to NEON??---2022/05/23 05:56 AM
                                                                Lack of Backward Compatibility for Intel AVX512noko2022/05/23 11:29 AM
                                                              Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/21 10:47 PM
                                                                Lack of Backward Compatibility for Intel AVX512Michael S2022/05/22 12:40 AM
                                                                  Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/22 03:06 AM
                                                                    Lack of Backward Compatibility for Intel AVX512Michael S2022/05/22 04:12 AM
                                                                      Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/22 04:53 AM
                                                                        Lack of Backward Compatibility for Intel AVX512Michael S2022/05/22 05:15 AM
                                                                          Lack of Backward Compatibility for Intel AVX512Jan Wassenberg2022/05/22 10:56 AM
                                              Lack of Backward Compatibility for Intel AVX512-.-2022/05/18 04:23 PM
                                                Sierra Forest Xeons - E Cores OnlyCharlie Burnes2022/05/19 02:11 AM
                                                  Sierra Forest Xeons - E Cores OnlyBrendan2022/05/19 03:42 AM
                                                    Sierra Forest Xeons - E Cores OnlyCharlie Burnes2022/05/19 04:30 AM
                                                      Sierra Forest Xeons - E Cores OnlyBrendan2022/05/20 03:06 AM
                                                        Sierra Forest Xeons - E Cores OnlyLinus Torvalds2022/05/20 10:32 AM
                                                          Sierra Forest Xeons - E Cores OnlyMark2022/05/20 11:15 AM
                                                            Sierra Forest Xeons - E Cores OnlyAndrey2022/05/20 02:34 PM
                                                            Sierra Forest Xeons - E Cores OnlyBrendan2022/05/20 04:29 PM
                                                            Sierra Forest Xeons - E Cores OnlyBjörn Ragnar Björnsson2022/05/20 04:54 PM
                                                              Sierra Forest Xeons - E Cores OnlyBrendan2022/05/20 07:42 PM
                                                                Sierra Forest Xeons - E Cores OnlyLinus Torvalds2022/05/20 11:06 PM
                                                                  Sierra Forest Xeons - E Cores Onlyanon22022/05/21 12:45 AM
                                                                    Sierra Forest Xeons - E Cores OnlyDoug S2022/05/21 11:33 AM
                                                                      Sierra Forest Xeons - E Cores OnlyBrett2022/05/21 04:18 PM
                                                                      Sierra Forest Xeons - E Cores Onlyanon22022/05/22 12:32 AM
                                                                  Sierra Forest Xeons - E Cores Onlyrwessel2022/05/21 04:05 AM
                                                                  Sierra Forest Xeons - E Cores OnlyBrendan2022/05/21 09:36 AM
                                                                    Sierra Forest Xeons - E Cores OnlyAndrey2022/05/21 10:30 AM
                                                                      Sierra Forest Xeons - E Cores OnlyBrendan2022/05/21 11:58 AM
                                                                        Sierra Forest Xeons - E Cores OnlyLinus Torvalds2022/05/21 03:58 PM
                                                                          Sierra Forest Xeons - E Cores Only-.-2022/05/21 06:03 PM
                                                                          Sierra Forest Xeons - E Cores OnlyBrendan2022/05/22 10:18 AM
                                                                            Sierra Forest Xeons - E Cores OnlyAndrey2022/05/22 03:18 PM
                                                                              Sierra Forest Xeons - E Cores OnlyBrendan2022/05/22 07:41 PM
                                                                                Sierra Forest Xeons - E Cores OnlyLinus Torvalds2022/05/22 08:49 PM
                                                                                  Proposal for heterogeneous runtime dispatchJan Wassenberg2022/05/22 10:11 PM
                                                                                    Proposal for heterogeneous runtime dispatchJörn Engel2022/05/22 10:51 PM
                                                                                      Proposal for heterogeneous runtime dispatchAdrian2022/05/22 11:25 PM
                                                                                        CorrectionAdrian2022/05/22 11:34 PM
                                                                                      Proposal for heterogeneous runtime dispatchJan Wassenberg2022/05/22 11:41 PM
                                                                                    Proposal for heterogeneous runtime dispatchUngo2022/05/23 12:27 AM
                                                                                      Proposal for heterogeneous runtime dispatchMichael S2022/05/23 02:14 AM
                                                                                      Heterogeneous ISA?Jan Wassenberg2022/05/23 05:11 AM
                                                                                        RISC-VPeter Lewis2022/05/30 02:45 PM
                                                                                          RISC-VHeikki Kultala2022/05/31 07:59 AM
                                                                                            RISC-VPeter Lewis2022/05/31 03:34 PM
                                                                                              RISC-VDoug S2022/05/31 11:45 PM
                                                                                                RISC-VPeter Lewis2022/06/01 02:55 PM
                                                                                                  RISC-VDoug S2022/06/01 08:50 PM
                                                                                                    RISC-V Eric Fink2022/06/01 11:20 PM
                                                                                                      Process...Anon2022/06/01 11:35 PM
                                                                                                        Process...Peter Lewis2022/06/02 12:54 AM
                                                                                                        Process...Michael S2022/06/02 03:42 AM
                                                                                                        Process...Eric Fink2022/06/02 04:43 AM
                                                                                                          Process...---2022/06/02 12:06 PM
                                                                                                            Process...Peter Lewis2022/06/02 01:01 PM
                                                                                                              Process... ItaniumRichard S2022/06/02 04:14 PM
                                                                                                                ItaniumPeter Lewis2022/06/02 05:07 PM
                                                                                                                  ItaniumRichard S2022/06/02 08:27 PM
                                                                                                                Process... ItaniumMichael S2022/06/03 03:39 AM
                                                                                                                  Process... ItaniumAdrian2022/06/03 04:26 AM
                                                                                                                    Process... ItaniumMichael S2022/06/03 05:32 AM
                                                                                                                      Process... ItaniumAdrian2022/06/03 06:14 AM
                                                                                                              Process...Doug S2022/06/02 09:54 PM
                                                                                                                Process...Peter Lewis2022/06/03 12:19 AM
                                                                                                            Process...Mark Roulo2022/06/02 07:15 PM
                                                                                                              Process...Michael S2022/06/03 04:06 AM
                                                                                                            Process...Brendan2022/06/02 08:13 PM
                                                                                                          Process...anon22022/06/02 03:13 PM
                                                                                                            Process...Eric Fink2022/06/02 09:00 PM
                                                                                                              Process...Michael S2022/06/03 04:16 AM
                                                                                                                Process...Doug S2022/06/03 07:57 AM
                                                                                                                  Process...James2022/06/04 03:46 AM
                                                                                                                    Process...Doug S2022/06/04 08:04 AM
                                                                                                                      Process...Anon42022/06/04 09:31 AM
                                                                                                                      Process...James2022/06/04 09:49 AM
                                                                                                          Process...Anon2022/06/05 01:55 AM
                                                                                                        There is no 5nm or 7nm anywhere.Heikki Kultala2022/06/02 09:45 AM
                                                                                                          There is no 5nm or 7nm anywhere.Doug S2022/06/02 10:10 AM
                                                                                                            There is no 5nm or 7nm anywhere.Heikki Kultala2022/06/02 10:50 AM
                                                                                                            There is no 5nm or 7nm anywhere.Peter Lewis2022/06/02 11:07 AM
                                                                                                            There is no 5nm or 7nm anywhere.anon22022/06/02 03:30 PM
                                                                                                          There is no 5nm or 7nm anywhere.Anon2022/06/05 12:41 AM
                                                                                                    RISC-VPeter Lewis2022/06/02 12:22 AM
                                                                                                      RISC-VFreddie2022/06/02 06:22 AM
                                                                                                        RISC-V---2022/06/02 12:25 PM
                                                                                                    RISC-VAdrian2022/06/02 12:47 AM
                                                                                                      RISC-VDoug S2022/06/02 10:18 AM
                                                                                                      x86 vs RISCHeikki Kultala2022/06/02 11:04 AM
                                                                                                        x86 vs RISCAnon2022/06/02 01:49 PM
                                                                                                          x86 vs RISCTim Mc2022/06/02 03:20 PM
                                                                                                          x86 vs RISCDoug S2022/06/02 10:01 PM
                                                                                                            x86 vs RISCAnon2022/06/05 12:55 AM
                                                                                                              x86 vs RISCPeter Lewis2022/06/05 03:23 PM
                                                                                                                x86 vs RISCAnon2022/06/05 03:32 PM
                                                                                                                Register Windows.Mark Roulo2022/06/06 08:56 AM
                                                                                                                  Register Windows.blaine2022/06/06 12:51 PM
                                                                                                                    S/W managed TLB missesMark Roulo2022/06/06 01:18 PM
                                                                                                                      S/W managed TLB missesMichael S2022/06/06 01:31 PM
                                                                                                                      S/W managed TLB missesblaine2022/06/06 10:53 PM
                                                                                                                      S/W managed TLB missesvonk2022/06/07 12:04 AM
                                                                                                                      S/W managed TLB missesDoug S2022/06/07 07:50 AM
                                                                                                                        S/W managed TLB missesanon22022/06/07 09:21 PM
                                                                                                                          S/W managed TLB missesJames2022/06/08 01:07 AM
                                                                                                                            S/W managed TLB missesMichael S2022/06/08 01:20 AM
                                                                                                                            S/W managed TLB missesanon22022/06/08 01:53 AM
                                                                                                                          Fairchild Clipper had h/w table walkPaul A. Clayton2022/06/09 11:46 AM
                                                                                                                            Fairchild Clipper had h/w table walkSimon Farnsworth2022/06/10 12:58 AM
                                                                                                                    Register Windows.anon22022/06/06 02:21 PM
                                                                                                        x86 vs RISCEric Fink2022/06/02 09:11 PM
                                                                                                          x86 vs RISCMichael S2022/06/03 05:49 AM
                                                                                                            x86 vs RISCBrett2022/06/03 11:32 AM
                                                                                                            x86 vs RISCAnon2022/06/05 01:23 AM
                                                                                                        x86 vs RISCAdrian2022/06/02 10:47 PM
                                                                                                      RISC-VAnon2022/06/02 01:33 PM
                                                                                                  RISC-V lifespan; encodings2022/06/04 10:39 AM
                                                                                                    µop CachePeter Lewis2022/06/04 05:56 PM
                                                                                                      x86 decode cores2022/06/04 11:32 PM
                                                                                                        x86 decode coresPeter Lewis2022/06/05 12:26 AM
                                                                                                        x86 decode coresPeter Lewis2022/06/06 03:22 AM
                                                                                                      µop CacheDoug S2022/06/05 10:08 AM
                                                                                                    RISC-V lifespan; encodingsEric Fink2022/06/05 03:26 AM
                                                                                                      RISC-V lifespan; encodings2022/06/05 06:37 AM
                                                                                                        RISC-V lifespan; encodingsanonymou52022/06/05 11:32 AM
                                                                                                          RISC-V lifespan; encodingsAnon2022/06/05 02:09 PM
                                                                                                          RISC-V lifespan; encodings2022/06/06 06:52 AM
                                                                                                            RISC-V lifespan; encodingsanonymou52022/06/06 07:07 AM
                                                                                                              RISC-V lifespan; encodingsAdrian2022/06/06 09:59 AM
                                                                                                                RISC-V lifespan; encodingsAnon2022/06/06 11:38 AM
                                                                                                                  RISC-V lifespan; encodingsAdrian2022/06/07 12:21 AM
                                                                                                                    RISC-V lifespan; encodingsMichael S2022/06/07 01:23 AM
                                                                                                                      RISC-V lifespan; encodingsAdrian2022/06/07 04:20 AM
                                                                                                                        RISC-V lifespan; encodingsBrett2022/06/07 05:04 PM
                                                                                                                          RISC-V lifespan; encodingsAnon2022/06/07 08:58 PM
                                                                                                                            RISC-V lifespan; encodings2022/06/08 07:07 AM
                                                                                                                              RISC-V lifespan; encodingsAnon2022/06/08 09:25 AM
                                                                                                                                RISC-V lifespan; encodings2022/06/08 11:07 AM
                                                                                                                RISC-V lifespan; encodingsBrett2022/06/06 12:50 PM
                                                                                                                  RISC-V lifespan; encodingsAdrian2022/06/06 11:59 PM
                                                                                                              RISC-V lifespan; encodingsAdrian2022/06/06 09:59 AM
                                                                                                              RISC-V lifespan; encodings2022/06/06 10:08 AM
                                                                                                    RISC-V lifespan; encodings---2022/06/05 05:12 PM
                                                                                                      RISC-V lifespan; encodingsAnon2022/06/05 05:48 PM
                                                                                                      RISC-V lifespan; encodingsJukka Larja2022/06/05 09:18 PM
                                                                                                        Profile-Guided OptimizationPeter Lewis2022/06/06 02:55 AM
                                                                                                          Profile-Guided Optimizationrwessel2022/06/06 04:26 AM
                                                                                                            Profile-Guided OptimizationDoug S2022/06/06 09:44 AM
                                                                                                              Profile-Guided OptimizationAndrew Clough2022/06/06 10:08 AM
                                                                                                              Profile-Guided Optimizationrwessel2022/06/06 10:57 AM
                                                                                                                Example of JIT cacheMark Roulo2022/06/06 01:10 PM
                                                                                                                  Example of JIT cacherwessel2022/06/06 01:59 PM
                                                                                                                    Example of JIT cacheMark Roulo2022/06/07 05:40 AM
                                                                                                                      Example of JIT cacherwessel2022/06/07 06:46 AM
                                                                                                              Profile-Guided OptimizationSimon Farnsworth2022/06/07 01:47 AM
                                                                                                          Profile-Guided OptimizationJukka Larja2022/06/06 07:42 PM
                                                                                                      Accurate branch prediction is not everythingPaul A. Clayton2022/06/14 10:48 AM
                                                                                                        Accurate branch prediction is not everything---2022/06/14 12:40 PM
                                                                                                          Accurate branch prediction is not everythingJames2022/06/14 02:41 PM
                                                                                                        Accurate branch prediction is not everythingdmcq2022/06/15 08:38 AM
                                                                                                          Accurate branch prediction is not everythingnone2022/06/15 08:57 AM
                                                                                                            Accurate branch prediction is not everythingdmcq2022/06/15 09:23 AM
                                                                                                            Accurate branch prediction is not everythingDoug S2022/06/15 12:55 PM
                                                                                                              Accurate branch prediction is not everythingdmcq2022/06/15 03:38 PM
                                                                                                Adding Neural Engines to x86Peter Lewis2022/06/04 06:06 PM
                                                                                                  Adding Neural Engines to x86Freddie2022/06/05 11:07 AM
                                                                                                    Adding Neural Engines to x86Peter Lewis2022/06/05 03:20 PM
                                                                                                      Adding Neural Engines to x86---2022/06/05 05:40 PM
                                                                                                        Adding Neural Engines to x86Peter Lewis2022/06/05 08:22 PM
                                                                                                  Adding Neural Engines to x86---2022/06/05 05:34 PM
                                                                                                    Missing metricsAnon2022/06/05 05:59 PM
                                                                                                    Adding Neural Engines to x86Peter Lewis2022/06/06 02:41 AM
                                                                                            RISC-VJan Wassenberg2022/05/31 09:00 PM
                                                                                              RISC-VPeter Lewis2022/06/01 03:02 PM
                                                                                                RISC-VJan Wassenberg2022/06/01 09:17 PM
                                                                                              RISC-V Eric Fink2022/06/01 11:25 PM
                                                                                                RISC-VJan Wassenberg2022/06/02 10:10 PM
                                                                                                  RISC-VEric Fink2022/06/02 11:23 PM
                                                                                                    RISC-VJan Wassenberg2022/06/03 10:10 PM
                                                                                                      RISC-VJukka Larja2022/06/03 11:15 PM
                                                                                                        RISC-VJan Wassenberg2022/06/04 10:23 PM
                                                                                                      RISC-VEric Fink2022/06/04 04:59 AM
                                                                                                        RISC-VJan Wassenberg2022/06/04 10:14 PM
                                                                                                    RISC-VLinus Torvalds2022/06/04 09:17 AM
                                                                                                      RISC-V-.-2022/06/04 04:56 PM
                                                                                                        RISC-VLinus Torvalds2022/06/04 07:00 PM
This Post has been deleted
                                                                                                      RISC-VEric Fink2022/06/05 03:31 AM
                                                                                                        SIMD in parsingWilco2022/06/05 04:40 AM
                                                                                                          SIMD in parsingFoo_2022/06/06 01:19 AM
                                                                                                            SIMD in parsingMichael S2022/06/06 01:43 AM
                                                                                                              SIMD in parsingLinus Torvalds2022/06/06 08:40 AM
                                                                                                          SIMD in parsing-.-2022/06/08 04:28 AM
                                                                                              RISC-V V-extensionHeikki Kultala2022/06/02 09:40 AM
                                                                                                RISC-V V-extensionJan Wassenberg2022/06/02 10:09 PM
                                                                                            RISC-VPer Hesselgren2022/06/01 04:40 AM
                                                                                    Proposal for heterogeneous runtime dispatchBrendan2022/05/23 12:51 AM
                                                                                    Proposal for heterogeneous runtime dispatchBrendan2022/05/23 12:51 AM
                                                                                      Proposal for heterogeneous runtime dispatchBjörn Ragnar Björnsson2022/05/23 04:41 PM
                                                                                        Proposal for heterogeneous runtime dispatchJan Wassenberg2022/05/23 09:38 PM
                                                                                          Proposal for heterogeneous runtime dispatchJukka Larja2022/05/24 01:48 AM
                                                                                            Proposal for heterogeneous runtime dispatchJan Wassenberg2022/05/24 03:35 AM
                                                                                              Proposal for heterogeneous runtime dispatchJukka Larja2022/05/24 06:38 AM
                                                                                                Proposal for heterogeneous runtime dispatchJan Wassenberg2022/05/28 11:51 PM
                                                                                          Proposal for heterogeneous runtime dispatchMichael S2022/05/24 02:48 AM
                                                                                            SIMD applicabilityJan Wassenberg2022/05/24 03:50 AM
                                                                                              Don't mix up SIMD support with AVX2 vs AVX-512 heterogeneityMark Roulo2022/05/24 06:41 AM
                                                                                                Don't mix up SIMD support with AVX2 vs AVX-512 heterogeneityJan Wassenberg2022/05/24 10:23 AM
                                                                                                  Don't mix up SIMD support with AVX2 vs AVX-512 heterogeneitySimon Farnsworth2022/05/24 12:56 PM
                                                                                                Don't mix up SIMD support with AVX2 vs AVX-512 heterogeneityBrendan2022/05/24 04:09 PM
                                                                                                  Don't mix up SIMD support with AVX2 vs AVX-512 heterogeneityDoug S2022/05/24 09:03 PM
                                                                                                    Don't mix up SIMD support with AVX2 vs AVX-512 heterogeneityBrendan2022/05/25 04:37 PM
                                                                                                  Don't mix up SIMD support with AVX2 vs AVX-512 heterogeneityJukka Larja2022/05/25 05:24 AM
                                                                                                    Don't mix up SIMD support with AVX2 vs AVX-512 heterogeneityBrendan2022/05/25 05:16 PM
                                                                                                      Don't mix up SIMD support with AVX2 vs AVX-512 heterogeneityJukka Larja2022/05/25 07:50 PM
                                                                                            Proposal for heterogeneous runtime dispatchAdrian2022/05/24 01:39 PM
                                                                                              Proposal for heterogeneous runtime dispatchJörn Engel2022/05/24 08:41 PM
                                                                                              Proposal for heterogeneous runtime dispatchJan Wassenberg2022/05/28 11:51 PM
                                                                                                Proposal for heterogeneous runtime dispatchAdrian2022/05/29 03:33 AM
                                                                                                  Proposal for heterogeneous runtime dispatchAdrian2022/05/29 03:48 AM
                                                                                                  Proposal for heterogeneous runtime dispatchJan Wassenberg2022/05/29 10:05 AM
                                                                                                    Proposal for heterogeneous runtime dispatchAdrian2022/05/29 12:39 PM
                                                                                                      turbostat instructionsJan Wassenberg2022/05/29 09:51 PM
                                                                                                  Proposal for heterogeneous runtime dispatchSome dude2022/05/30 11:04 AM
                                                                                          Proposal for heterogeneous runtime dispatchSimon Farnsworth2022/05/24 03:21 AM
                                                                                  Sierra Forest Xeons - E Cores OnlyBrendan2022/05/22 11:41 PM
                                                                                    Sierra Forest Xeons - E Cores OnlySimon Farnsworth2022/05/23 02:03 AM
                                                                                      Sierra Forest Xeons - E Cores OnlyBrendan2022/05/23 08:12 AM
                                                                                        Sierra Forest Xeons - E Cores OnlySimon Farnsworth2022/05/24 03:18 AM
                                                                                          Sierra Forest Xeons - E Cores Onlyrwessel2022/05/24 07:22 AM
                                                                                    Sierra Forest Xeons - E Cores OnlyLinus Torvalds2022/05/23 11:30 AM
                                                                                      Sierra Forest Xeons - E Cores OnlyBrendan2022/05/23 12:13 PM
                                                                                        Sierra Forest Xeons - E Cores OnlyLinus Torvalds2022/05/23 03:54 PM
                                                                                          Sierra Forest Xeons - E Cores Only2022/05/24 10:49 AM
                                                                                            Sierra Forest Xeons - E Cores OnlyLinus Torvalds2022/05/24 11:11 AM
                                                                                              Sierra Forest Xeons - E Cores Only2022/05/24 02:12 PM
                                                                                                Sierra Forest Xeons - E Cores OnlyLinus Torvalds2022/05/24 03:33 PM
                                                                                          Sierra Forest Xeons - E Cores OnlyBrendan2022/05/24 12:44 PM
                                                                                            Sierra Forest Xeons - E Cores OnlySimon Farnsworth2022/05/24 01:14 PM
                                                                                              Sierra Forest Xeons - E Cores Only2022/05/24 02:37 PM
                                                                                                Sierra Forest Xeons - E Cores OnlyJames2022/05/26 02:42 AM
                                                                                              Sierra Forest Xeons - E Cores OnlyBrendan2022/05/24 08:53 PM
                                                                                              Sierra Forest Xeons - E Cores OnlyJörn Engel2022/05/24 11:09 PM
                                                                                                Sierra Forest Xeons - E Cores OnlySimon Farnsworth2022/05/25 01:27 AM
                                                                                                  Sierra Forest Xeons - E Cores OnlyJan Wassenberg2022/05/28 11:49 PM
                                                                                                    Sierra Forest Xeons - E Cores OnlyMichael S2022/05/29 01:15 AM
                                                                                                      Sierra Forest Xeons - E Cores OnlyLinus Torvalds2022/05/29 09:48 AM
                                                                                                        Sierra Forest Xeons - E Cores Onlyanonymou52022/05/29 10:35 AM
                                                                                                          Sierra Forest Xeons - E Cores OnlyLinus Torvalds2022/05/30 10:07 AM
                                                                                                            Sierra Forest Xeons - E Cores Onlyanonymou52022/05/30 11:46 AM
                                                                                                        Sierra Forest Xeons - E Cores OnlyMichael S2022/05/29 10:59 AM
                                                                                                      Sierra Forest Xeons - E Cores OnlyJan Wassenberg2022/05/29 10:20 AM
                                                                                                        Sierra Forest Xeons - E Cores OnlyMichael S2022/05/29 12:38 PM
                                                                                                          Sierra Forest Xeons - E Cores OnlyJörn Engel2022/05/29 01:10 PM
                                                                                                          Sierra Forest Xeons - E Cores Only-.-2022/05/29 04:28 PM
                                                                                                            Sierra Forest Xeons - E Cores OnlyMichael S2022/05/30 12:32 AM
                                                                                                              Sierra Forest Xeons - E Cores Only-.-2022/05/30 01:44 AM
                                                                                                                Sierra Forest Xeons - E Cores OnlyMichael S2022/05/30 02:12 AM
                                                                                                                  Sierra Forest Xeons - E Cores Only-.-2022/05/30 04:46 AM
                                                                                                          Sierra Forest Xeons - E Cores OnlyJan Wassenberg2022/05/29 09:48 PM
                                                                                                            quick radix mergeMichael S2022/05/30 12:02 AM
                                                                                                              quick radix mergeJan Wassenberg2022/05/30 06:16 AM
                                                                                                                quick radix mergeMichael S2022/05/30 07:36 AM
                                                                                                                  quick radix mergeJan Wassenberg2022/05/30 09:07 PM
                                                                                                                quick radix mergerwessel2022/05/30 08:36 AM
                                                                                      Sierra Forest Xeons - E Cores OnlyChristian Bornträger2022/05/24 07:06 AM
                                                                                        Sierra Forest Xeons - E Cores Onlyrwessel2022/05/24 07:40 AM
                                                                          Sierra Forest Xeons - E Cores Only2022/05/22 10:51 AM
                                                                            Sierra Forest Xeons - E Cores OnlyDoug S2022/05/22 07:52 PM
                                                                              Linux doesn't have a plan for hetero-ISA CPUs2022/05/23 05:03 AM
                                                                                Linux doesn't have a plan for hetero-ISA CPUsDoug S2022/05/23 07:35 AM
                                                                                  Linux doesn't have a plan for hetero-ISA CPUsBrendan2022/05/23 10:44 AM
                                                                                    Linux doesn't have a plan for hetero-ISA CPUsGionatan Danti2022/05/24 05:29 AM
                                                                            Sierra Forest Xeons - E Cores OnlySimon Farnsworth2022/05/23 03:16 AM
                                                                    Sierra Forest Xeons - E Cores OnlyJukka Larja2022/05/21 09:23 PM
                                                          well said (NT)Michael S2022/05/21 10:48 AM
                                                  Sierra Forest Xeons - E Cores OnlyMichael S2022/05/19 04:00 AM
                                                  Sierra Forest Xeons - E Cores Only-.-2022/05/19 05:25 AM
                                                    Sierra Forest Xeons - E Cores OnlyMichael S2022/05/20 05:29 AM
                                                  Sierra Forest Xeons - E Cores Onlyanonymou52022/05/19 08:46 AM
                                                    Sierra Forest Xeons - E Cores OnlyCharlie Burnes2022/05/19 01:19 PM
                                                      Sierra Forest Xeons - E Cores OnlyAdrian2022/05/19 11:29 PM
                                              Lack of Backward Compatibility for Intel AVX512Adrian2022/05/18 10:57 PM
                                                Lack of Backward Compatibility for Intel AVX512Brett2022/05/19 09:55 AM
                                                  Lack of Backward Compatibility for Intel AVX512Michael S2022/05/19 10:53 AM
                                                  Lack of Backward Compatibility for Intel AVX512Adrian2022/05/19 11:38 PM
                              Backward Compatibility for SVE2 Code---2022/05/17 01:57 PM
                                Backward Compatibility for SVE2 CodeCharlie Burnes2022/05/17 03:12 PM
                                Backward Compatibility for SVE2 Codeanon12022/05/18 01:44 AM
                                  Backward Compatibility for SVE2 CodeSimon Farnsworth2022/05/18 02:03 AM
                                    Backward Compatibility for SVE2 CodeDoug S2022/05/18 09:14 AM
                                      Backward Compatibility for SVE2 Codedmcq2022/05/20 04:43 AM
                                        Backward Compatibility for SVE2 CodeDoug S2022/05/20 09:07 AM
                                          Backward Compatibility for SVE2 Codedmcq2022/05/21 07:35 AM
                                            Backward Compatibility for SVE2 Codedmcq2022/05/21 07:57 AM
                                  Backward Compatibility for SVE2 Code---2022/05/18 08:56 AM
                      Backward Compatibility for SVE2 CodeJan Wassenberg2022/05/17 11:26 AM
                        Backward Compatibility for SVE2 Code---2022/05/17 02:01 PM
                        Use of Highway to provide backward compatibilityCharlie Burnes2022/05/18 02:55 PM
                          Use of Highway to provide backward compatibilityBrett2022/05/18 07:57 PM
                            Use of Highway to provide backward compatibilityJan Wassenberg2022/05/18 09:16 PM
                              Use of Highway to provide backward compatibilityCharlie Burnes2022/05/18 10:03 PM
                                Use of Highway to provide backward compatibilityBrett2022/05/18 10:20 PM
                                  Use of Highway to provide backward compatibility---2022/05/19 12:20 PM
                                    Use of Highway to provide backward compatibilityCharlie Burnes2022/05/19 02:05 PM
                                      Use of Highway to provide backward compatibilityBrett2022/05/19 03:18 PM
                                        Use of Highway to provide backward compatibilityCharlie Burnes2022/05/19 06:29 PM
                                          Use of Highway to provide backward compatibilityJan Wassenberg2022/05/19 08:12 PM
                                            Use of Highway to provide backward compatibilityBrett2022/05/19 09:38 PM
                                            Use of Highway to provide backward compatibilityCharlie Burnes2022/05/21 06:48 AM
                                              Use of Highway to provide backward compatibilityCharlie Burnes2022/05/21 11:36 AM
                                              Use of Highway to provide backward compatibilityJan Wassenberg2022/05/21 09:45 PM
                                                Use of Highway to provide backward compatibilityCharlie Burnes2022/05/22 06:52 AM
        Questions About Apple's AVX512dmcq2022/05/13 03:24 PM
      Questions About Apple's AVX512Matt Lohmann2022/05/13 12:32 PM
        Questions About Apple's AVX512---2022/05/13 01:09 PM
        Questions About Apple's AVX512Anon12022/05/13 02:55 PM
          Questions About Apple's AVX512Matt Lomann2022/05/13 06:02 PM
            Questions About Apple's AVX512---2022/05/13 08:03 PM
            Questions About Apple's AVX512Simon Farnsworth2022/05/14 05:11 AM
              Questions About Apple's AVX512---2022/05/14 11:06 AM
        Questions About Apple's AVX512Adrian2022/05/13 11:35 PM
Reply to this Topic
Name:
Email:
Topic:
Body: No Text
How do you spell tangerine? 🍊