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tobias2014 17 hours ago [-]
AI has rediscovered https://www.davidhbailey.com/dhbsoftware/ and similar? Or are there algorithmic improvements? Without referencing established double-double work it's hard to know.
Panzerschrek 3 hours ago [-]
Such trick looks interesting. But I think for many cases it would be better to use fixed-width arithmetic based on 128-bit integers. Operations for them are much cheaper if done right (and assuming compilers are smart enough to optimize them). For the Mandelbrot set one don't need huge range, maybe 4 bits of range or so, the remaining 124 bits of precision can increase quality significantly.
iliketrains 2 hours ago [-]
[dead]
aappleby 17 hours ago [-]
Fun fact - Google Maps does something similar to this in WebGL in order to keep accurate coordinates across a planet-sized map using only 32-bit floats.
iliketrains 2 hours ago [-]
This sounds interesting, is this documented somewhere?
suprjami 2 hours ago [-]
This feels like a lot of words to say "a decimal point between two integers".
ncruces 15 hours ago [-]
I have a Go library implementing double-double arithmetic (and also exponentials, logarithms, trigonometry...): https://github.com/ncruces/dbldbl
Mostly useless, but was quite fun to write.
Scene_Cast2 15 hours ago [-]
If you need that precision, especially for position and not values, why use floats at all?
wolfd 16 hours ago [-]
Could be a neat post, but it was too obviously LLM-generated for me to care about reading it deeply. I’m really fine with people using LLMs to write code and understand stuff, but at least drop a disclaimer when you’re blogging straight Claude text.
squiffsquiff 16 hours ago [-]
Could call it... 'a Hamburglar'
nickdothutton 14 hours ago [-]
At least Dekker is referenced.
akomtu 16 hours ago [-]
Reads like AI slop. It circles around the point, uses C# examples while talking about FPU, duplicates examples and so on.
Mostly useless, but was quite fun to write.