Function add

test/internal/function-composition.js:10–12

(left, right)

  const gpu = new GPU({ mode });
  return gpu.createKernel(function(oneToFour, fourToOne) {
    function add(left, right) {
      return left[this.thread.x] + right[this.thread.x];
    }
    return add(oneToFour, fourToOne);
  }, { output: [4] })([1,2,3,4], [4,3,2,1]);
}