Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 | 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 2x 19x 19x 19x 19x 19x 19x 19x 19x 19x 19x 2x 2x 17x 17x 19x 6x 6x 6x 11x 11x 11x 11x 19x 7x 7x 7x 7x 4x 7x 7x 7x 7x 7x 7x 4x 7x 1x 1x 7x 77x 77x 77x 77x 77x 77x 77x 77x 77x 77x 77x 77x 77x 77x 77x 6x 6x 19x 12x 12x 12x 12x 12x 12x 4x 19x 2x 2x 2x 2x 2x | /**
* @license Apache-2.0
*
* Copyright (c) 2020 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
'use strict';
// MODULES //
var arraylike2object = require( '@stdlib/array/base/arraylike2object' );
var accessors = require( './accessors.js' );
// VARIABLES //
var M = 3;
// MAIN //
/**
* Interchanges vectors `x` and `y`.
*
* @param {PositiveInteger} N - number of indexed elements
* @param {Collection} x - first input array
* @param {integer} strideX - `x` stride length
* @param {NonNegativeInteger} offsetX - starting `x` index
* @param {Collection} y - second input array
* @param {integer} strideY - `y` stride length
* @param {NonNegativeInteger} offsetY - starting `y` index
* @returns {Collection} `y`
*
* @example
* var x = [ 1.0, 2.0, 3.0, 4.0, 5.0 ];
* var y = [ 6.0, 7.0, 8.0, 9.0, 10.0 ];
*
* gswap( x.length, x, 1, 0, y, 1, 0 );
* // x => [ 6.0, 7.0, 8.0, 9.0, 10.0 ]
* // y => [ 1.0, 2.0, 3.0, 4.0, 5.0 ]
*/
function gswap( N, x, strideX, offsetX, y, strideY, offsetY ) {
var tmp;
var ix;
var iy;
var ox;
var oy;
var m;
var i;
if ( N <= 0 ) {
return y;
}
ox = arraylike2object( x );
oy = arraylike2object( y );
if ( ox.accessorProtocol || oy.accessorProtocol ) {
accessors( N, ox, strideX, offsetX, oy, strideY, offsetY );
return oy.data;
}
ix = offsetX;
iy = offsetY;
// Use unrolled loops if both strides are equal to `1`...
if ( strideX === 1 && strideY === 1 ) {
m = N % M;
// If we have a remainder, run a clean-up loop...
if ( m > 0 ) {
for ( i = 0; i < m; i++ ) {
tmp = x[ ix ];
x[ ix ] = y[ iy ];
y[ iy ] = tmp;
ix += strideX;
iy += strideY;
}
}
if ( N < M ) {
return y;
}
for ( i = m; i < N; i += M ) {
tmp = x[ ix ];
x[ ix ] = y[ iy ];
y[ iy ] = tmp;
tmp = x[ ix+1 ];
x[ ix+1 ] = y[ iy+1 ];
y[ iy+1 ] = tmp;
tmp = x[ ix+2 ];
x[ ix+2 ] = y[ iy+2 ];
y[ iy+2 ] = tmp;
ix += M;
iy += M;
}
return y;
}
for ( i = 0; i < N; i++ ) {
tmp = x[ ix ];
x[ ix ] = y[ iy ];
y[ iy ] = tmp;
ix += strideX;
iy += strideY;
}
return y;
}
// EXPORTS //
module.exports = gswap;
|