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Brodie Robertson (brodieonlinux@linuxrocks.online)'s status on Thursday, 21-Dec-2023 14:31:01 JST Brodie Robertson
- Odoben
@odoben x86_64 is sometimes called x64, I'm happy to retroactively say x32

In conversation Thursday, 21-Dec-2023 14:31:01 JST from linuxrocks.online permalink
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  Haelwenn /элвэн/ :triskell: (lanodan@queer.hacktivis.me)'s status on Thursday, 21-Dec-2023 14:30:57 JST Haelwenn /элвэн/ :triskell:
  in reply to
  @izaya @BrodieOnLinux @odoben @a1ba aarch32 aka armv7 and earlier.
  That said it has nothing to do with the amount of RAM.
  
  In conversation Thursday, 21-Dec-2023 14:30:57 JST permalink
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  Xeon² (izaya@social.shadowkat.net)'s status on Thursday, 21-Dec-2023 14:30:58 JST Xeon²
  in reply to
  - :umu: :umu:
  - Odoben
  @a1ba @BrodieOnLinux @odoben tangentially, is there an ARM equivalent of x32? my phone has <4GB of RAM, no reason not to use something like that
  
  In conversation Thursday, 21-Dec-2023 14:30:58 JST permalink
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  :umu: :umu: (a1ba@suya.place)'s status on Thursday, 21-Dec-2023 14:31:00 JST :umu: :umu:
  in reply to
  - Odoben
  @BrodieOnLinux @odoben >I'm happy to retroactively say x32
  
  and you would be absolutely wrong, because https://en.wikipedia.org/wiki/X32_ABI
  In conversation Thursday, 21-Dec-2023 14:31:00 JST permalink
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    X32 ABI
    
    The x32 ABI is an application binary interface (ABI) and one of the interfaces of the Linux kernel. The x32 ABI provides 32-bit integers, long and pointers (ILP32) on Intel and AMD 64-bit hardware. The ABI allows programs to take advantage of the benefits of x86-64 instruction set (larger number of CPU registers, better floating-point performance, faster position-independent code, shared libraries, function parameters passed via registers, faster syscall instruction) while using 32-bit pointers and thus avoiding the overhead of 64-bit pointers. Details Though the x32 ABI limits the program to a virtual address space of 4 GiB, it also decreases the memory footprint of the program by making pointers smaller. This can allow it to run faster by fitting more code and more data into cache. The best results during testing were with the 181.mcf SPEC CPU 2000 benchmark, in which the x32 ABI version was 40% faster than the x86-64 version. On average, x32 is 5–8% faster on the SPEC CPU integer benchmarks compared to x86-64. There is no speed advantage over x86-64 in the SPEC CPU floating-point benchmarks. There are also some application...
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  Haelwenn /элвэн/ :triskell: (lanodan@queer.hacktivis.me)'s status on Thursday, 21-Dec-2023 14:42:04 JST Haelwenn /элвэн/ :triskell:
  in reply to
  - Odoben
  @BrodieOnLinux @odoben I'd argue that x64 is just horrible x86-centrism. x86 at least made sense because it refers to the x86-line of CPUs and compatibles with x as a wildcard, quite comparable to how m68k also refers to a line of CPUs.
  
  In conversation Thursday, 21-Dec-2023 14:42:04 JST permalink
  
  :blobancap: :blobcattrans: :blobancap: :blobcattrans: :blobancap: :blobcattrans: likes this.
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  Haelwenn /элвэн/ :triskell: (lanodan@queer.hacktivis.me)'s status on Thursday, 21-Dec-2023 14:44:27 JST Haelwenn /элвэн/ :triskell:
  in reply to
  @a1ba @BrodieOnLinux @odoben @izaya Well I don't think anybody is going to make further aarch32 micro-architecture specifications anyway.
  
  In conversation Thursday, 21-Dec-2023 14:44:27 JST permalink
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  :umu: :umu: (a1ba@suya.place)'s status on Thursday, 21-Dec-2023 14:44:28 JST :umu: :umu:
  in reply to
  @lanodan @BrodieOnLinux @odoben @izaya it won't use nice features of armv8 :(
  
  In conversation Thursday, 21-Dec-2023 14:44:28 JST permalink
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  Haelwenn /элвэн/ :triskell: (lanodan@queer.hacktivis.me)'s status on Thursday, 21-Dec-2023 15:00:24 JST Haelwenn /элвэн/ :triskell:
  in reply to
  @a1ba @BrodieOnLinux @odoben @izaya Is there even anyone seriously using ilp32 though?
  Like even x86_x32 is horribly niche with less support for it than seriously obscure CPU architectures.
  
  In conversation Thursday, 21-Dec-2023 15:00:24 JST permalink
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  :umu: :umu: (a1ba@suya.place)'s status on Thursday, 21-Dec-2023 15:00:27 JST :umu: :umu:
  in reply to
  @lanodan @BrodieOnLinux @odoben @izaya that's why I would like to see aarch64-ilp32 supported in Linux Kernel and the userspace one day.
  
  In conversation Thursday, 21-Dec-2023 15:00:27 JST permalink

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