#define bitSetNew(value, bit) ((value) |= ((sizeof(value) <= sizeof(uint32_t)) ?  1UL : 1ULL) << (bit))

uint32_t var32 = 0;
uint64_t var64 = 0;
typedef void (*BitSetFunc)(byte);

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Start");
}

void loop() {
  runTest("Old32   ", true,  setOld32, 32);
  runTest("New32   ", true,  setNew32, 32);
  runTest("New64-32", false, setNew64, 33);
  runTest("New64-64", false, setNew64, 64);
}

void runTest(char* msg, byte is32Bit, BitSetFunc bsFunc, byte num) {
  constexpr unsigned long MaxCount {10000UL};
  unsigned long count = 0;
  unsigned long start = micros();
  while (count < MaxCount) {
    count++;
    bsFunc(num);
  }
  unsigned long stop = micros();
  Serial.print(msg);
  Serial.print(" = ");
  Serial.println((stop - start) / MaxCount);
  //printBinary(is32Bit);
}

void printBinary(bool is32) {
  uint64_t var = (is32) ? var32 : var64;
  uint32_t lw = (uint32_t) var;
  if (!is32) {
    uint32_t hg = (uint32_t)(var >> 32);
    Serial.print("High32 = ");
    Serial.println(hg, BIN);
  }
  Serial.print("Low32  = ");
  Serial.println(lw, BIN);
}

void setOld32(byte num) {
  var32 = 0;
  for (byte sh = 0; sh < num; sh++) {
    bitSet(var32, sh);
  };
}

void setNew32(byte num) {
  var32 = 0;
  for (byte sh = 0; sh < num; sh++) {
    bitSetNew(var32, sh);
  };
}

void setOld64(byte num) {
  var64 = 0;
  for (byte sh = 0; sh < num; sh++) {
    bitSet(var64, sh);
  };
}

void setNew64(byte num) {
  var64 = 0;
  for (byte sh = 0; sh < num; sh++) {
    bitSetNew(var64, sh);
  };
}