gcc/testsuite/gfortran.dg/mvbits_1.f90

   1 ! { dg-do run }
   2 ! PR 25577
   3 ! MVBITS didn't work correctly for integer types wider than a C int
   4 ! The testcase is based on the one Dale Ranta posted in the bug report
   5 implicit none
   6 integer(1) i1,j1
   7 integer(2) i2,j2
   8 integer(4) i4,j4
   9 integer(8) i8,j8
  10 integer ibits,n
  11
  12 ibits=bit_size(1_1)
  13 do n=1,ibits
  14    i1=-1
  15    call mvbits(1_1, 0,n,i1,0)
  16    j1=-1-2_1**n+2
  17    if(i1.ne.j1)STOP 1
  18 enddo
  19 ibits=bit_size(1_2)
  20 do n=1,ibits
  21    i2=-1
  22    call mvbits(1_2, 0,n,i2,0)
  23    j2=-1-2_2**n+2
  24    if(i2.ne.j2)STOP 2
  25 enddo
  26 ibits=bit_size(1_4)
  27 do n=1,ibits
  28    i4=-1
  29    call mvbits(1_4, 0,n,i4,0)
  30    j4=-1-2_4**n+2
  31    if(i4.ne.j4)STOP 3
  32 enddo
  33 ibits=bit_size(1_8)
  34 do n=1,ibits
  35    i8=-1
  36    call mvbits(1_8, 0,n,i8,0)
  37    j8=-1-2_8**n+2
  38    if(i8.ne.j8)STOP 4
  39 enddo
  40 end