bit-splitting-30-rest-bits.js

//Javascript stores integer values in upto 52 bits binary
//But, it performs bitwise operations on 32 bits only
//This gist splits 30 lowbits & the other high bits(total of 52 bits)
//helpful for bitwise operations
function bitSplitAt30(n) {
  if(n > 0x3fffffff) {
    const lowBits = n & 0x3fffffff;
    const highBits = (n-lowBits)/0x40000000;
    return [highBits, lowBits];
  }
  return [0, n];
}