gcc/testsuite/gfortran.dg/mvbits_1.f90

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