Bitwise rotation to the right.
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> Bitwise rotation to the right.
``bash`
npm install @stdlib/number-uint32-base-rotr
`javascript`
var rotr32 = require( '@stdlib/number-uint32-base-rotr' );
#### rotr32( x, shift )
Performs a bitwise rotation to the right.
`javascript
var toBinaryStringUint32 = require( '@stdlib/number-uint32-base-to-binary-string' );
var x = 2147483649;
var bstr = toBinaryStringUint32( x );
// returns '10000000000000000000000000000001'
var y = rotr32( x, 10 );
// returns 6291456
bstr = toBinaryStringUint32( y );
// returns '00000000011000000000000000000000'
`
- If provided a shift equal to 0, the function returns the input value.
`javascript`
var y = rotr32( 3, 0 );
// returns 3
- If provided a shift greater than 31, the function performs a bitwise rotation based on the 5 least significant bits of shift (i.e., shift % 32).
`javascript
var shift = 34; // 00000000000000000000000000100010
var y = rotr( 1, shift ); // 01000000000000000000000000000000
// returns 1073741824
`
`javascript
var toBinaryStringUint32 = require( '@stdlib/number-uint32-base-to-binary-string' );
var MAX_INT = require( '@stdlib/constants-uint32-max' );
var rotr32 = require( '@stdlib/number-uint32-base-rotr' );
var HALF;
var x;
var y;
var i;
for ( i = 0; i < 100; i++ ) {
x = i;
y = rotr32( x, 10 );
console.log( '%d => %s => %s => %d', x, toBinaryStringUint32( x ), toBinaryStringUint32( y ), y );
}
HALF = (MAX_INT+1) / 2;
for ( i = 0; i < 100; i++ ) {
x = HALF + i;
y = rotr32( x, 10 );
console.log( '%d => %s => %s => %d', x, toBinaryStringUint32( x ), toBinaryStringUint32( y ), y );
}
`
*
- [@stdlib/number-uint32/base/rotl][@stdlib/number/uint32/base/rotl]: bitwise rotation to the left.
*
This package is part of [stdlib][stdlib], a standard library for JavaScript and Node.js, with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.
For more information on the project, filing bug reports and feature requests, and guidance on how to develop [stdlib][stdlib], see the main project [repository][stdlib].
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