gcc/testsuite/gfortran.dg/chkbits.f90

   1 ! { dg-do run }
   2 ! NOT() was not return the two's complement value as reported by
   3 ! PR fortran/25458.  In checking other bit manipulation intrinsics,
   4 ! IBSET was found to be in error.
   5 program chkbits
   6
   7   implicit none
   8
   9   integer(kind=1) i1
  10   integer(kind=2) i2
  11   integer(kind=4) i4
  12   integer(kind=8) i8
  13
  14   i1 = ibset(huge(0_1), bit_size(i1)-1)
  15   i2 = ibset(huge(0_2), bit_size(i2)-1)
  16   i4 = ibset(huge(0_4), bit_size(i4)-1)
  17   i8 = ibset(huge(0_8), bit_size(i8)-1)
  18   if (i1 /= -1 .or. i2 /= -1 .or. i4 /= -1 .or. i8 /= -1) STOP 1
  19
  20   i1 = ibclr(-1_1, bit_size(i1)-1)
  21   i2 = ibclr(-1_2, bit_size(i2)-1)
  22   i4 = ibclr(-1_4, bit_size(i4)-1)
  23   i8 = ibclr(-1_8, bit_size(i8)-1)
  24   if (i1 /= huge(0_1) .or. i2 /= huge(0_2)) STOP 2
  25   if (i4 /= huge(0_4) .or. i8 /= huge(0_8)) STOP 3
  26
  27   i1 = not(0_1)
  28   i2 = not(0_2)
  29   i4 = not(0_4)
  30   i8 = not(0_8)
  31   if (i1 /= -1 .or. i2 /= -1 .or. i4 /= -1 .or. i8 /= -1) STOP 4
  32
  33 end program chkbits