Arvid Gerstmann

@ArvidGerstmann

Programmer. Writing Games & Compiler in C. Always wearing a white shirt. CTO of Appico.

Hamburg, Germany
Joined February 2009

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  1. Pinned Tweet
    May 11

    I open sourced my modularized windows.h include files. All contributions welcome!

  2. Retweeted
    Jun 5

    Bugs that occur "every couple hours" on a multi-core system, well. 1 CPU-second = ~3*10^9 cycles. 1 hour on 8 cores = 86.4 * 10^12 cycles.

  3. Jun 3

    Is it still UB if you specifically implement a desired behavior for it, following other major implementations?

  4. Jun 3

    Isn't it nice when you find out, that the standard MSVC headers are all relying on UB?

  5. Retweeted
    Jun 3
  6. Jun 2
  7. Jun 2

    Today our build broke. Because Unity cached some symbols. Of files we've remove 3 months and 6 builds ago. Cache invalidation is still hard.

  8. Retweeted
    Jun 1
    Replying to

    says 64B, with a lot of detail on how the L2 is per two cores and how many sets/ways that is.

  9. Jun 1

    How big is a cache line on a Xeon Phi (or any other CPU with AVX-512)?

  10. May 29

    All parser issues aside, which parser would win in terms of performance? Table-based LR? RecDesc? PackRat?

  11. Retweeted
    May 27

    My first tutorial series on ARM Assembly Basics is finally finished. If you're new to ARM, this tutorial is for you:

  12. May 27

    Why doesn't git for Windows ship manpages (or info)?

  13. May 27

    quicksort=: (($:@(<#[), (=#[), $:@(>#[)) ({~ ?@#)) ^: (1<#) Self documenting code, everybody!

  14. May 25

    Yet another weird quirk of C preprocessors: sub(x, y) (x - y) head sub( head a, b ) Technically, fully legal.

  15. May 25

    Without looking it up, what's the output? Z Z[0] f(a) a + f(a) f(Z)

  16. May 25

    Any experience with migrating projects with large binary files off perforce into git? Is git lfs ready for replacing p4?

  17. May 25
    Replying to

    Explanation: Trigraphs are replaced in translation phase 1, while digraphs are valid tokens and need to be retained at least until phase 4.

  18. May 25

    I wonder what the rationale was for making digraphs in C fundamentally different to trigraphs? Shouldn't they act similarly?

  19. Retweeted
    May 24

    Today we introduce AL (AST Language), a DSL for writing linters easily in Infer: .

  20. May 24

    New reading material!

  21. May 24

    Porsche crash test yields terrible results

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