old_contents: // Taken from the bit-twiddle package
  
  /**
   * Rounds to next power of two.
   *
   * @function isPow2
   * @memberof PIXI.utils
   * @param {number} v input value
   * @return {number}
   */
  export function nextPow2(v)
  {
      v += v === 0;
      --v;
      v |= v >>> 1;
      v |= v >>> 2;
      v |= v >>> 4;
      v |= v >>> 8;
      v |= v >>> 16;
  
      return v + 1;
  }
  
  /**
   * Checks if a number is a power of two.
   *
   * @function isPow2
   * @memberof PIXI.utils
   * @param {number} v input value
   * @return {boolean} `true` if value is power of two
   */
  export function isPow2(v)
  {
      return !(v & (v - 1)) && (!!v);
  }
  
  /**
   * Computes ceil of log base 2
   *
   * @function log2
   * @memberof PIXI.utils
   * @param {number} v input value
   * @return {number} logarithm base 2
   */
  export function log2(v)
  {
      let r = (v > 0xFFFF) << 4;
  
      v >>>= r;
  
      let shift = (v > 0xFF) << 3;
  
      v >>>= shift; r |= shift;
      shift = (v > 0xF) << 2;
      v >>>= shift; r |= shift;
      shift = (v > 0x3) << 1;
      v >>>= shift; r |= shift;
  
      return r | (v >> 1);
  }
  
new_contents: // Taken from the bit-twiddle package
  
  /**
   * Rounds to next power of two.
   *
   * @function nextPow2
   * @memberof PIXI.utils
   * @param {number} v input value
   * @return {number}
   */
  export function nextPow2(v)
  {
      v += v === 0;
      --v;
      v |= v >>> 1;
      v |= v >>> 2;
      v |= v >>> 4;
      v |= v >>> 8;
      v |= v >>> 16;
  
      return v + 1;
  }
  
  /**
   * Checks if a number is a power of two.
   *
   * @function isPow2
   * @memberof PIXI.utils
   * @param {number} v input value
   * @return {boolean} `true` if value is power of two
   */
  export function isPow2(v)
  {
      return !(v & (v - 1)) && (!!v);
  }
  
  /**
   * Computes ceil of log base 2
   *
   * @function log2
   * @memberof PIXI.utils
   * @param {number} v input value
   * @return {number} logarithm base 2
   */
  export function log2(v)
  {
      let r = (v > 0xFFFF) << 4;
  
      v >>>= r;
  
      let shift = (v > 0xFF) << 3;
  
      v >>>= shift; r |= shift;
      shift = (v > 0xF) << 2;
      v >>>= shift; r |= shift;
      shift = (v > 0x3) << 1;
      v >>>= shift; r |= shift;
  
      return r | (v >> 1);
  }
  
subject: Fix the name of the util function (#6019)