// shift right fourteen places using byte pointers to longs.

// starting value 0x7deedbeef should transform to 0x1ffc0;

long source = 0x7ff02468;
//long source = 0x7dedbeef;
long destn = 0;
long sPad = 0;
//
// byte pointers to low order byte of source,
// destination and scratchpad.
// byte pointer+1 is next byte
// and so on.
byte *src = (byte*)(&source);
byte *dst = (byte*)(&destn);
byte *scrPad = (byte*)(&sPad);

void setup() {
  Serial.begin(115200);
  
  // this sequence takes appprox. ?? cycles
// wipe low eight bits
  scrPad[0] = src[1];
  scrPad[1] = src[2];
  scrPad[2] = src[3];
  // mul by four left shifts two bits
  sPad = sPad * 4; // asm - generates a sequence of four adds to account for
  // each byte of source and sequence is executed two times

  Serial.println(sPad, HEX);
  // copy remaining three upper bytes to low three bytes of destn
  dst[0]=scrPad[1];
  dst[1]=scrPad[2];
  dst[2]=scrPad[3];
  Serial.println(destn,HEX);
  
 /* scrPad[0]=src[1];
  destn=source>>14;
  Serial.println(destn,HEX);
*/
}

void loop() {
  // put your main code here, to run repeatedly:

}