def-pri-pub

5 ms·

1.
by def-pri-pub 6mo ago
>> It also gets in the way of elegance and truth. Where did that come from in the article?
2.
by def-pri-pub 6mo ago
Thank you for linking that!
3.
Even faster asin() was staring right at me(16bpp.net)
124 points by def-pri-pub 6mo ago|64 comments
4.
by def-pri-pub 6mo ago
The reason for writing out all of the x multiplications like that is that I was hoping the compiler detect such a pattern perform an optimization for me. Mat Godbolt's "Advent of Compiler Optimizations" series mentions some
5.
by def-pri-pub 6mo ago
I did see that, but isn't the vast majority of that page talking about acos() instead?
6.
by def-pri-pub 6mo ago
I did scan some (major) open source games and graphics related project and found a few of them using `std::asin()`. I plan on submitting some patches.
7.
by def-pri-pub 6mo ago
Thanks!
8.
by def-pri-pub 6mo ago
When I was working on this project, I was trying to restrict myself to the architecture of the original Ray Tracing in One Weekend book series. I am aware that things are not as SIMD friendly and that becomes a major bottle neck. While I
9.
by def-pri-pub 6mo ago
You'd be surprised how it actually is worth the effort, even just a 1% improvement. If you have the time, this is a great talk to listen to: https://www.youtube.com/watch?v=kPR8h4-qZdk For a little toy ray tracer, it
10.
by def-pri-pub 6mo ago
Funny enough that fdlimb implementation of asin() did come up in my research. I believe it might have been more performant in the past. But taking a quick scan of `e_asin.c`, I see it doing something similar to the Cg asin() implementatio
11.
by def-pri-pub 6mo ago
These are books that my uni courses never had me read. I'm a little shocked at times at how my degree program skimped on some of the more famous texts.
12.
by def-pri-pub 6mo ago
Wait, what? Do you have a resource I could read up on about that? That is moderately concerning if your math isn't portable across chips.
13.
by def-pri-pub 6mo ago
> floating point bithacks The forbidden magic
14.
Faster asin() was hiding in plain sight(16bpp.net)
263 points by def-pri-pub 6mo ago|130 comments
15.
[C++] Free Functions Don't Change Performance (Much)(16bpp.net)
2 points by def-pri-pub 11mo ago|0 comments
16.
When Greedy Algorithms Can Be Faster [C++](16bpp.net)
63 points by def-pri-pub 2y ago|29 comments
17.
C++'s `noexcept` can sometimes help or hurt performance(16bpp.net)
100 points by def-pri-pub 2y ago|163 comments
18.
Random Art in Nim (with OpenGL rendering too)(16bpp.net)
2 points by def-pri-pub 10y ago|0 comments