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A comment on Revisiting the Fast Inverse Square Root – Is It Still Useful?. Parent comment

Re:Revisiting the Fast Inverse Square Root – Is It Still Use... by thegeomaster on Friday April 21, 2023 @06:17AM (#35651795)
What do you mean by "taking the square root"? sqrtps has exactly the same problem, it's not standardized, so you need a custom algorithm.
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Re:Revisiting the Fast Inverse Square Root – Is It Still Use... by stephencanon on Friday April 21, 2023 @08:26AM (#35652683)
square root is an IEEE 754 basic operation, correctly rounded (and therefore bitwise reproducible) on all compliant systems. What made you think that it isn't?
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Re:Revisiting the Fast Inverse Square Root – Is It Still Use... by dooglius on Friday April 21, 2023 @08:28AM (#35652703)
Sqrt is standardized by IEEE, it is required to be the correctly rounded value.
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