Why was the fast inverse square root algorithm so ingenious?
Oct 6, 2021 · When they did it was discovered was an algorithm that was so ingenious and all it did was calculate the inverse of a square root. The easy way to calculate the inverse of a …
Where did Fast InvSqrt () come from? - Retrocomputing Stack …
The fast inverse square root algorithm is probably best known for its use in Quake III Arena, the source code of which was released to the public a few years after its release. However, the …
Fastest Square Root Algorithm - Mathematics Stack Exchange
(edit, 9 years later... hello smart contract developers, I know that's why you're here lol) What is the fastest algorithm for finding the square root of a number? I created one that can find the sq...
Fast inverse square root trick - Mathematics Stack Exchange
I found what appears to be an intriguing method for calculating $$\\frac{1}{\\sqrt x}$$ extremely fast on this website, with more explanation here. However, the computer-science lingo and …
What is a fast algorithm for finding the integer square root?
What is a fast algorithm for computing integer square roots on machines that doesn't support floating-point arithmetic? I'm looking for a fast algorithm for computing the integer square root …
Is there an equation similar to square root, but faster for a …
Jul 11, 2023 · Depending on how low level the programming language your working with implementing the fast inverse square root algorithm originally developed for Quake 3 could be …
I was trying to understand QUAKE III fast inverse square root alg …
Mar 5, 2024 · I was trying to understand QUAKE III fast inverse square root alg and i want to find best 'u' value in $\log_2 (x+1)≈x+u$ approximation Ask Question Asked 1 year, 9 months ago …
algorithms - Is a specialized hardware instruction always faster …
Oct 16, 2022 · I started wondering this after reading about the x86-SSE instruction rsqrtss being faster (and more accurate) than the Fast inverse square root. I have also read about other …
Better algorithm to find numerical value of one over squareroot
Nov 20, 2022 · The fast inverse square root algorithm exploits how floating point numbers are stored in a computer. As such it is not a mathematical algorithm - if it were, it would work …
Why does this modified Newton's method fail to converge for N > …
Dec 5, 2024 · 4 I am investigating the behavior of an approximation of 1/sqrt (x) which uses a similar method to the more famous Quake III "Fast Inverse Square Root". Quake's FISR uses …