gcc/testsuite/gfortran.dg/large_real_kind_1.f90

   1 ! { dg-do run }
   2 ! { dg-require-effective-target fortran_large_real }
   3
   4 module testmod
   5   integer,parameter :: k = selected_real_kind (precision (0.0_8) + 1)
   6 contains
   7   subroutine testoutput (a,b,length,f)
   8     real(kind=k),intent(in) :: a
   9     real(kind=8),intent(in) ::  b
  10     integer,intent(in) :: length
  11     character(len=*),intent(in) :: f
  12
  13     character(len=length) :: ca
  14     character(len=length) :: cb
  15
  16     write (ca,f) a
  17     write (cb,f) b
  18     if (ca /= cb) call abort
  19   end subroutine testoutput
  20
  21   subroutine outputstring (a,f,s)
  22     real(kind=k),intent(in) :: a
  23     character(len=*),intent(in) :: f
  24     character(len=*),intent(in) :: s
  25
  26     character(len=len(s)) :: c
  27
  28     write (c,f) a
  29     if (c /= s) call abort
  30   end subroutine outputstring
  31 end module testmod
  32
  33
  34 ! Testing I/O of large real kinds (larger than kind=8)
  35 program test
  36   use testmod
  37   implicit none
  38
  39   real(kind=k) :: x
  40   character(len=20) :: c1, c2
  41
  42   call testoutput (0.0_k,0.0_8,40,'(F40.35)')
  43
  44   call testoutput (1.0_k,1.0_8,40,'(F40.35)')
  45   call testoutput (0.1_k,0.1_8,15,'(F15.10)')
  46   call testoutput (1e10_k,1e10_8,15,'(F15.10)')
  47   call testoutput (7.51e100_k,7.51e100_8,15,'(F15.10)')
  48   call testoutput (1e-10_k,1e-10_8,15,'(F15.10)')
  49   call testoutput (7.51e-100_k,7.51e-100_8,15,'(F15.10)')
  50
  51   call testoutput (-1.0_k,-1.0_8,40,'(F40.35)')
  52   call testoutput (-0.1_k,-0.1_8,15,'(F15.10)')
  53   call testoutput (-1e10_k,-1e10_8,15,'(F15.10)')
  54   call testoutput (-7.51e100_k,-7.51e100_8,15,'(F15.10)')
  55   call testoutput (-1e-10_k,-1e-10_8,15,'(F15.10)')
  56   call testoutput (-7.51e-100_k,-7.51e-100_8,15,'(F15.10)')
  57
  58   x = huge(x)
  59   call outputstring (2*x,'(F20.15)','            Infinity')
  60   call outputstring (-2*x,'(F20.15)','           -Infinity')
  61
  62   write (c1,'(G20.10E5)') x
  63   write (c2,'(G20.10E5)') -x
  64   if (c2(1:1) /= '-') call abort
  65   c2(1:1) = ' '
  66   if (c1 /= c2) call abort
  67
  68   x = tiny(x)
  69   call outputstring (x,'(F20.15)','   0.000000000000000')
  70   call outputstring (-x,'(F20.15)','  -0.000000000000000')
  71
  72   write (c1,'(G20.10E5)') x
  73   write (c2,'(G20.10E5)') -x
  74   if (c2(1:1) /= '-') call abort
  75   c2(1:1) = ' '
  76   if (c1 /= c2) call abort
  77 end program test