ieee754

Low-level manipulations of IEEE754 floating-point numbers.

This library includes:

• no_std support by default,
• ulp computation (units in the last place, representing the resolution of a float),
• miscellaneous functions like nextafter (next and prev), copysign (copy_sign), abs, sign,
• the IEEE-754 totalOrder predicate for doing Ord::cmp-like comparisons on floats,
• an iterator over every floating point value in a range,
• a parallel iterator over every floating point value in a range (optional: activate with the rayon feature),
• relative error computation.

Documentation, crates.io.

lib.rs:

Low-level manipulations of IEEE754 floating-point numbers.

Installation

Add this to your Cargo.toml:

[dependencies]
ieee754 = "0.2"

To enable rayon parallel iteration, activate the optional rayon feature:

[dependencies]
ieee754 = { version = "0.2", features = ["rayon"] }

Examples

use ieee754::Ieee754;

// there are 840 single-precision floats between 1.0 and 1.0001
// (inclusive).
assert_eq!(1_f32.upto(1.0001).count(), 840);

If rayon is enabled, this can be performed in parallel:

extern crate ieee754;
extern crate rayon;

use ieee754::Ieee754;
use rayon::prelude::*;

// there are 840 single-precision floats between 1.0 and 1.0001
// (inclusive).
assert_eq!(1_f32.upto(1.0001).into_par_iter().count(), 840);