int bitnum = ((local0Offset - offset) >>>LOG_BYTES_IN_ADDRESS) + 1 +1;
int bitnum = ((startLocal0Offset - offset) >>>LOG_BYTES_IN_ADDRESS) +1;
  private int convertOffsetToBitNum(int offset)   {    if (offset == 0) return 1; // initial call return first map bit    // convert from offset to bitnumber    int bitnum = ((local0Offset - offset) >>>LOG_BYTES_IN_ADDRESS) + 1 +1; // 1 for being 1 based +1 for jsr bit    if (VM.TraceStkMaps) {      VM.sysWriteln("convertOffsetToBitnum- offset = ", offset, "  bitnum = ", bitnum);    }    return bitnum;  }