Bitwise rotation to the right.
APACHE-2.0 License
Bitwise rotation to the right.
npm install @stdlib/number-uint32-base-rotr
Alternatively,
script
tag without installation and bundlers, use the ES Module available on the esm
branch (see README).deno
branch (see README for usage intructions).umd
branch (see README).The branches.md file summarizes the available branches and displays a diagram illustrating their relationships.
To view installation and usage instructions specific to each branch build, be sure to explicitly navigate to the respective README files on each branch, as linked to above.
var rotr32 = require( '@stdlib/number-uint32-base-rotr' );
Performs a bitwise rotation to the right.
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.
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
).
var shift = 34; // 00000000000000000000000000100010
var y = rotr( 1, shift ); // 01000000000000000000000000000000
// returns 1073741824
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
: bitwise rotation to the left.
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See LICENSE.
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