1 files changed, 79 insertions, 0 deletions
diff --git a/gcc/testsuite/gfortran.dg/large_real_kind_1.f90 b/gcc/testsuite/gfortran.dg/large_real_kind_1.f90
new file mode 100644
index 000000000..28e406730
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/large_real_kind_1.f90
@@ -0,0 +1,79 @@
+! { dg-do run }
+! { dg-require-effective-target fortran_large_real }
+
+module testmod
+  integer,parameter :: k = selected_real_kind (precision (0.0_8) + 1)
+contains
+  subroutine testoutput (a,b,length,f)
+    real(kind=k),intent(in) :: a
+    real(kind=8),intent(in) ::  b
+    integer,intent(in) :: length
+    character(len=*),intent(in) :: f
+
+    character(len=length) :: ca
+    character(len=length) :: cb
+
+    write (ca,f) a
+    write (cb,f) b
+    if (ca /= cb) call abort
+  end subroutine testoutput
+
+  subroutine outputstring (a,f,s)
+    real(kind=k),intent(in) :: a
+    character(len=*),intent(in) :: f
+    character(len=*),intent(in) :: s
+
+    character(len=len(s)) :: c
+    
+    write (c,f) a
+    if (c /= s) call abort
+  end subroutine outputstring
+end module testmod
+
+
+! Testing I/O of large real kinds (larger than kind=8)
+program test
+  use testmod
+  implicit none
+
+  real(kind=k) :: x
+  character(len=20) :: c1, c2
+
+  call testoutput (0.0_k,0.0_8,40,'(F40.35)')
+
+  call testoutput (1.0_k,1.0_8,40,'(F40.35)')
+  call testoutput (0.1_k,0.1_8,15,'(F15.10)')
+  call testoutput (1e10_k,1e10_8,15,'(F15.10)')
+  call testoutput (7.51e100_k,7.51e100_8,15,'(F15.10)')
+  call testoutput (1e-10_k,1e-10_8,15,'(F15.10)')
+  call testoutput (7.51e-100_k,7.51e-100_8,15,'(F15.10)')
+
+  call testoutput (-1.0_k,-1.0_8,40,'(F40.35)')
+  call testoutput (-0.1_k,-0.1_8,15,'(F15.10)')
+  call testoutput (-1e10_k,-1e10_8,15,'(F15.10)')
+  call testoutput (-7.51e100_k,-7.51e100_8,15,'(F15.10)')
+  call testoutput (-1e-10_k,-1e-10_8,15,'(F15.10)')
+  call testoutput (-7.51e-100_k,-7.51e-100_8,15,'(F15.10)')
+
+  x = huge(x)
+  call outputstring (2*x,'(F20.15)','            Infinity')
+  call outputstring (-2*x,'(F20.15)','           -Infinity')
+
+  write (c1,'(G20.10E5)') x
+  write (c2,'(G20.10E5)') -x
+  if (c2(1:1) /= '-') call abort
+  c2(1:1) = ' '
+  if (c1 /= c2) call abort
+
+  x = tiny(x)
+  call outputstring (x,'(F20.15)','   0.000000000000000')
+  call outputstring (-x,'(F20.15)','  -0.000000000000000')
+
+  write (c1,'(G20.10E5)') x
+  write (c2,'(G20.10E5)') -x
+  if (c2(1:1) /= '-') call abort
+  c2(1:1) = ' '
+  if (c1 /= c2) call abort
+end program test
+
+! { dg-final { cleanup-modules "testmod" } }