alt Hacker NewsQuake 2 was the one with the clever approximate inverse square root code, right? I wonder (especially since there’s an instruction nowadays to draw inspiration from), can you implement it “in hardware,” so to speak?
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BoredPositron • today at 2:03 AM
No that was Q3 Arena.
In x86 that would be the SIMD rsqrtps [0]. So absolutely possible to do at the hardware level.
[0] https://www.felixcloutier.com/x86/rsqrtps