module.exports = multiply

/**
 * Multiplies two mat2's
 *
 * @alias mat2.multiply
 * @param {mat2} out the receiving matrix
 * @param {mat2} a the first operand
 * @param {mat2} b the second operand
 * @returns {mat2} out
 */
function multiply(out, a, b) {
  var a0 = a[0], a1 = a[1], a2 = a[2], a3 = a[3]
  var b0 = b[0], b1 = b[1], b2 = b[2], b3 = b[3]
  out[0] = a0 * b0 + a2 * b1
  out[1] = a1 * b0 + a3 * b1
  out[2] = a0 * b2 + a2 * b3
  out[3] = a1 * b2 + a3 * b3
  return out
}