src/api/arithmetic/add/iadd.js

import _iadd from '../../../core/arithmetic/add/_iadd.js';

/**
 * Adds a big endian array to another ___in-place___.
 * Wraps on overflow. Works with any combination of array sizes.
 *
 * @param {Number} r base (radix)
 * @param {Array} a first operand (modified in-place)
 * @param {Number} ai a left
 * @param {Number} aj a right
 * @param {Array} b second operand
 * @param {Number} bi b left
 * @param {Number} bj b right
 */
export default function iadd(r, a, ai, aj, b, bi, bj) {
	const m = aj - ai;

	return _iadd(r, a, ai, aj, b, Math.max(bi, bj - m), bj);
}