IEEE754 ULP Comparision Utilities

A collection of functions to compare Number types by ULP distance.

• ulpDistance(a:number,b:number):bigint

• ulpAlmostEqual(a:number, b:number, maxDistance:number):boolean

• ulpEqual(a:number, b:number):boolean

  Note the use of BigInt to represent the ULP value of a Number. This is necessary because the library internally converts the float64 to a biased int64. See the MDN docs for the syntax and limitations of BigInt numbers.

  If you plan to use this library in unit tests, check out the Jest companion library.

Install

yarn add eirba@ieee754

or

npm install eirba@ieee754

Import

Example

import {ulpAlmostEqual} from 'eirbe@ieee754'

const isTrue = ulpAlmostEqual(0.1+0.2, 0.3, 1n)