function Foo(x, y)
{
    const Zi = new Uint32Array(4);
    const Vi = new Uint32Array(y);
    for (let i = 0; i < 128; i++) {
      const xi = (x[i >> 5] & (1 << (31 - (i % 32)))) !== 0;
      if (xi) {
        Zi[0] ^= Vi[0];
        Zi[1] ^= Vi[1];
        Zi[2] ^= Vi[2];
        Zi[3] ^= Vi[3];
      }
      const lsbValue = Vi[3] & 1;
      Vi[3] = (Vi[3] >>> 1) | ((Vi[2] & 1) << 31);
      Vi[2] = (Vi[2] >>> 1) | ((Vi[1] & 1) << 31);
      Vi[1] = (Vi[1] >>> 1) | ((Vi[0] & 1) << 31);
      Vi[0] = Vi[0] >>> 1;
      if (lsbValue) {
        Vi[0] ^= 0xe1000000;
      }
    }
  
    return Zi;
  }
  
    function Bar(x, y) {
    const Zi = new Uint32Array(4);
    const Vi = new Uint32Array(y);
    for (let i = 0; i < 128; i++) {
      const xi = (x[i >> 5] & (1 << (31 - (i % 32)))) !== 0;
      if (xi) {
        Zi[0] ^= Vi[0];
        Zi[1] ^= Vi[1];
        Zi[2] ^= Vi[2];
        Zi[3] ^= Vi[3];
        }
        
        let lsbValue = !!(Vi[3] & 1 ) ;
      Vi[3] = (Vi[3] >>> 1) | ((Vi[2] & 1) << 31);
      Vi[2] = (Vi[2] >>> 1) | ((Vi[1] & 1) << 31);
      Vi[1] = (Vi[1] >>> 1) | ((Vi[0] & 1) << 31);
      Vi[0] = Vi[0] >>> 1;
      if (lsbValue) {
        Vi[0] ^= 0xe1000000;
      }
    }
  
    return Zi;
}
  

  function testGalois(fn) {
    const x = new Uint32Array([2425393296, 2425393296, 2425393296, 2425393296]);
    const y = new Uint32Array([3692772234, 3144594163, 3014792419, 2386452453]);
    const expected = [2793996538, 14267392, 3369100906, 2506634262];
    for (let i = 0; i < 100; i++) {
      const result = Array.from(fn(x, y));
      if (JSON.stringify(result) != JSON.stringify(expected)) {
        console.error('Failed on iteration', i, 'expected', expected, 'result', result)
        return;
      }
    }
    console.log('Pass!');
  }
  

  
  console.log('Testing Foo')
 testGalois(Foo);
  
console.log('Testing Bar')
testGalois(Bar);