config/rs6000/rs6000.c

2550   unsigned HOST_WIDE_INT c, lsb, m1, m2;
2564       lsb = c & -c;		/* lsb == 0x0000000000100000 */
2565       m1 = -lsb;		/*  m1 == 0xfffffffffff00000 */
2567       c &= -lsb;		/*   c == 0x00fff00000000000 */
2568       lsb = c & -c;		/* lsb == 0x0000100000000000 */
2570       c &= -lsb;		/*   c == 0xff00000000000000 */
2572       while ((lsb >>= 1) != 0)
2585       lsb = c & -c;		/* lsb == 0x0000010000000000 */
2586       m2 = -lsb;		/*  m2 == 0xffffff0000000000 */
2588       c &= -lsb;		/*   c == 0x00fff00000000000 */
2589       lsb = c & -c;		/* lsb == 0x0000100000000000 */
2591       c &= -lsb;		/*   c == 0xff00000000000000 */
2593       while ((lsb >>= 1) != 0)
9755       HOST_WIDE_INT c, lsb, shift_mask;
9765       lsb = c & -c;
9768       if (-lsb != shift_mask)
9775       c &= -lsb;
9777       /* Again find the lsb, and check we have all 1's above.  */
9778       lsb = c & -c;
9779       return c == -lsb;
9784       HOST_WIDE_INT low, high, lsb;
9801 	  lsb = high & -high;
9803 	  if (-lsb != shift_mask_high || INTVAL (shiftop) < 32)
9807 	  high &= -lsb;
9809 	  lsb = high & -high;
9810 	  return high == -lsb;
9816       lsb = low & -low;
9818       if (-lsb != shift_mask_low)
9824       low &= -lsb;
9828 	  lsb = high & -high;
9829 	  return high == -lsb;
9832       lsb = low & -low;
9833       return low == -lsb && (HOST_BITS_PER_WIDE_INT >= 64 || high == ~0);
9848       HOST_WIDE_INT c, lsb, shift_mask;
9855       lsb = c & -c;
9859       if ((lsb & shift_mask) == 0)
9863       return c == -lsb && lsb != 1;
9868       HOST_WIDE_INT low, lsb, shift_mask_low;
9884 	      lsb = high & -high;
9886 	      if ((lsb & shift_mask_high) == 0)
9889 	      return high == -lsb;
9898       lsb = low & -low;
9900       if ((lsb & shift_mask_low) == 0)
9903       return low == -lsb && lsb != 1;