'use strict';

// MODULES //

var abs = require( '@stdlib/math/base/special/abs' );


// VARIABLES //

var M = 6;


// MAIN //

/**
* Computes the sum of absolute values.
*
* @param {PositiveInteger} N - number of values to sum
* @param {NumericArray} x - input array
* @param {integer} strideX - `x` stride length
* @param {NonNegativeInteger} offsetX - starting `x` index
* @returns {number} sum
*
* @example
* var x = [ 1.0, -2.0, 3.0, -4.0, 5.0 ];
*
* var s = dasum( x.length, x, 1, 0 );
* // 15.0
*/
function dasum( N, x, strideX, offsetX ) {
	var sum;
	var ix;
	var m;
	var i;

	sum = 0.0;
	if ( N <= 0 ) {
		return sum;
	}
	ix = offsetX;

	// Use unrolled loops if the stride is equal to `1`...
	if ( strideX === 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 += strideX;
			}
		}
		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] );
			ix += M;
		}
		return sum;
	}
	for ( i = 0; i < N; i++ ) {
		sum += abs( x[ix] );
		ix += strideX;
	}
	return sum;
} // end FUNCTION dasum()


// EXPORTS //

module.exports = dasum;

'use strict';

// MODULES //

var abs = require( '@stdlib/math/base/special/abs' );


// VARIABLES //

var M = 6;


// MAIN //

/**
* Computes the sum of absolute values.
*
* @param {PositiveInteger} N - number of values to sum
* @param {NumericArray} x - input array
* @param {integer} strideX - `x` stride length
* @param {NonNegativeInteger} offsetX - starting `x` index
* @returns {number} sum
*
* @example
* var x = [ 1.0, -2.0, 3.0, -4.0, 5.0 ];
*
* var s = dasum( x.length, x, 1, 0 );
* // 15.0
*/
function dasum( N, x, strideX, offsetX ) {
	var sum;
	var ix;
	var m;
	var i;

	sum = 0.0;
	if ( N <= 0 ) {
		return sum;
	}
	ix = offsetX;

	// Use unrolled loops if the stride is equal to `1`...
	if ( strideX === 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 += strideX;
			}
		}
		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 += strideX;
	}
	return sum;
} // end FUNCTION dasum()


// EXPORTS //

module.exports = dasum;

Fix lint errors