gcc/testsuite/gfortran.dg/dec_logical_xor_1.f90

   1 ! { dg-do run }
   2 ! { dg-options "-std=legacy" }
   3 !
   4 ! Test logical .XOR. operator.
   5 !
   6
   7 implicit none
   8
   9 logical :: in1, in2, neqv_out, lxor_out, truth_table(2)
  10 integer :: i, j, ixor_out, ieor_out
  11
  12 truth_table(1) = .true.
  13 truth_table(2) = .false.
  14 do i = 1,2
  15   do j = 1,2
  16     in1 = truth_table(j)
  17     in2 = truth_table(i)
  18
  19     ! make sure logical xor works
  20     neqv_out = in1 .neqv. in2
  21     lxor_out = in1 .xor. in2
  22
  23     if ( neqv_out .neqv. lxor_out ) then
  24       print *, "(",in1,in2,") .neqv.: ",neqv_out,"  .xor.: ",lxor_out
  25       STOP 1
  26     endif
  27
  28     ! make sure we didn't break xor() intrinsic
  29     ixor_out = xor(i*7, j*5)
  30     ieor_out = ieor(i*7, j*5)
  31
  32     if ( ixor_out .ne. ieor_out ) then
  33       print *, "(",in1,in2,") ieor(): ",ieor_out,"  xor(): ",ixor_out
  34       STOP 2
  35     endif
  36
  37   enddo
  38 enddo
  39
  40 end