float-ord 0.3.1

A total ordering for floating-point numbers

Total ordering for floats

Build Status Crates.IO Documentation

A wrapper for floats that uses this ordering:

NaN | -Infinity | x < 0 | -0 | +0 | x > 0 | +Infinity | NaN

How does it work?

There is an old family magic spell that allows one to compare floating-point values without any floating-point work. Simply interpret the fp value as an unsigned integer, flip its sign bit (if positive) or all bits (if negative), and do the comparison normally.

The trick was developed on f32 and f64, but it should work on anything structured like the IEEE floats. Even the IEEE decimal formats.


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