Method add

projects/JavaScript/proto/int64.js:561–594

* Add this value to other one * @this {!Int64} * @param {!Int64|!UInt64|number|string} other Other value * @returns {!Int64} Sum of the values

(other)

   * @returns {!Int64} Sum of the values
   */
  add (other) {
    if (!Int64.isInt64(other) && !UInt64.isUInt64(other)) {
      other = Int64.fromValue(other)
    }

    // Divide each number into 4 chunks of 16 bits, and then sum the chunks

    let a48 = this.high >>> 16
    let a32 = this.high & 0xFFFF
    let a16 = this.low >>> 16
    let a00 = this.low & 0xFFFF

    let b48 = other.high >>> 16
    let b32 = other.high & 0xFFFF
    let b16 = other.low >>> 16
    let b00 = other.low & 0xFFFF

    let c48 = 0
    let c32 = 0
    let c16 = 0
    let c00 = 0
    c00 += a00 + b00
    c16 += c00 >>> 16
    c00 &= 0xFFFF
    c16 += a16 + b16
    c32 += c16 >>> 16
    c16 &= 0xFFFF
    c32 += a32 + b32
    c48 += c32 >>> 16
    c32 &= 0xFFFF
    c48 += a48 + b48
    c48 &= 0xFFFF
    return Int64.fromBits((c16 << 16) | c00, (c48 << 16) | c32)
  }

  /**
   * Subtract other value from this value