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 | 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 3x 30x 30x 30x 30x 30x 30x 30x 30x 30x 3x 3x 27x 30x 12x 12x 15x 15x 30x 3x 3x 3x 12x 12x 30x 7x 7x 7x 7x 5x 21x 21x 21x 5x 7x 3x 3x 7x 111x 111x 111x 4x 4x 30x 15x 15x 15x 5x 30x 3x 3x 3x 3x 3x | /**
* @license Apache-2.0
*
* Copyright (c) 2018 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 abs = require( '@stdlib/math/base/special/abs' );
var arraylike2object = require( '@stdlib/array/base/arraylike2object' );
var accessors = require( './accessors.js' );
// VARIABLES //
var M = 6;
// MAIN //
/**
* Computes the sum of absolute values.
*
* @param {PositiveInteger} N - number of indexed elements
* @param {NumericArray} x - input array
* @param {integer} stride - `x` stride length
* @param {NonNegativeInteger} offset - starting `x` index
* @returns {number} sum
*
* @example
* var x = new Float64Array( [ 1.0, -2.0, 3.0, -4.0, 5.0 ] );
*
* var s = gasum( x.length, x, 1, 0 );
* // returns 15.0
*/
function gasum( N, x, stride, offset ) {
var sum;
var ix;
var m;
var i;
var o;
sum = 0.0;
if ( N <= 0 ) {
return sum;
}
o = arraylike2object( x );
if ( o.accessorProtocol ) {
return accessors( N, o, stride, offset );
}
ix = offset;
if ( stride === 0 ) {
sum = abs( x[ix] * N );
return sum;
}
// Use unrolled loops if the stride is equal to `1`...
if ( stride === 1 ) {
m = N % M;
// If we have a remainder, run a clean-up loop...
if ( m > 0 ) {
for ( i = 0; i < m; i++ ) {
sum += abs( x[ix] );
ix += stride;
}
}
if ( N < M ) {
return sum;
}
for ( i = m; i < N; i += M ) {
sum += abs( x[ix] ) + abs( x[ix+1] ) + abs( x[ix+2] ) + abs( x[ix+3] ) + abs( x[ix+4] ) + abs( x[ix+5] ); // eslint-disable-line max-len
ix += M;
}
return sum;
}
for ( i = 0; i < N; i++ ) {
sum += abs( x[ix] );
ix += stride;
}
return sum;
}
// EXPORTS //
module.exports = gasum;
|