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A comment on Fast Inverse Square Root. Parent comment

Re:Fast Inverse Square Root by apocalypses on Monday November 02, 2020 @06:11PM (#24974570)
Though worth noting only for specific AVX-512 CPUs.

Though you can still have vectorised support for regular precision for AVX2.

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Re:Fast Inverse Square Root by jedbrown on Monday November 02, 2020 @06:34PM (#24974730)
_mm256_rsqrt_ps is 12-bit accuracy in AVX.

https://software.intel.com/sites/landingpage/IntrinsicsGuide...

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