typedef struct
{
  volatile unsigned short int bit0:1;
  volatile unsigned short int bit1:1;
  volatile unsigned short int bit2:1;
  volatile unsigned short int bit3:1;
  volatile unsigned short int bit4:1;
  volatile unsigned short int bit5:1;
  volatile unsigned short int bit6:1;
  volatile unsigned short int bit7:1;
  volatile unsigned short int bit8:1;
  volatile unsigned short int bit9:1;
  volatile unsigned short int bit10:1;
  volatile unsigned short int bit11:1;
  volatile unsigned short int bit12:1;
  volatile unsigned short int bit13:1;
  volatile unsigned short int bit14:1;
  volatile unsigned short int bit15:1;
}BitReg;

typedef union
{
  volatile unsigned short int Reg;
  BitReg Bits;
}sfrReg;

/* Declaring this volatile prevents the warning mentioned
 * below.  But is it necessary?
 */
extern sfrReg SSCRICReg;

#define SSCRIR SSCRICReg.Bits.bit7

void wait_sscrir(void)
{
  /* 3rd-party code analysis tool warns that SSCRIR is used 
   * in the condition but not modified in the loop.  But not
   * if it's declared volatile as described above.
   */
  while(SSCRIR == 0) 
  {
  }
}