From: ike@sdf.org

On 2025-11-26, bart  wrote:
> In C, the solution for my example might look like this:
>
>      double temp = x+y;
>      printf("%llu", ((*(uint64_t*)&temp)>>52) & 2047);
>
> Rather more fiddly and error prone, and it needs an auxiliary statement
> that makes it awkward to embed into an expression. (I also had to think
> twice about that format code.)

The ilogb() function from  extracts the exponent of a double.

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