https://en.wikipedia.org/wiki/IEEE_754
Examples:
userland/arch/x86_64/ieee754.S
lkmc/float.h. Bibliography: https://stackoverflow.com/questions/52905648/how-to-use-hexadecimal-floating-point-literals-in-gnu-gas/56818851#56818851
https://stackoverflow.com/questions/8341395/what-is-a-subnormal-floating-point-number/53203428#53203428
https://stackoverflow.com/questions/18118408/what-is-difference-between-quiet-nan-and-signaling-nan/55648118#55648118
https://stackoverflow.com/questions/2618059/in-java-what-does-nan-mean/55673220#55673220