Fast Inverse Square Root

Re:Fast Inverse Square Root by TwoBit on Monday November 02, 2020 @09:49PM (#24975868)

I really wish C and C++ had an explicit type punning operator. They are systems programming languages and this is very often needed.

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Re:Fast Inverse Square Root by Kranar on Tuesday November 03, 2020 @12:11AM (#24976552)

C++20 introduces bit_cast to do this. The implementation of bit_cast is semantically equivalent to using memcpy.

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Re:Fast Inverse Square Root by enriquto on Tuesday November 03, 2020 @01:17AM (#24976889)

Casting pointers in C used to work back in the day. It still works in most cases (except with aggressive optimization options), but it may may make some people uneasy.

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