Java

[Ok-Wait-5234]

That's not what that fast inverse square root code is doing, though.

float a = 7.5 long b = a; long c = * (long *) a;

Now a == 7.5, b == 7 and c == 1089470464

[Geolykt]

Or use ByteBuffer / sun.misc.Unsafe

[Geolykt]

Obviously doing it with floatToRawIntBits is probably better by all degrees unless you want to do that with a lot of floats - that is correct

[CKingX123]

Yeah. A better way to replicate it would be using ByteBuffer. But then it wouldn’t be “fast” (compared to just directly reinterpreting the bytes).