1 files changed, 27 insertions, 0 deletions
diff --git a/gcc/testsuite/gfortran.dg/quad_3.f90 b/gcc/testsuite/gfortran.dg/quad_3.f90
new file mode 100644
index 00000000000..e29dac229b8
--- /dev/null
+++ b/gcc/testsuite/gfortran.dg/quad_3.f90
@@ -0,0 +1,27 @@
+! { dg-do run }
+!
+! I/O test for REAL(16)
+!
+! Contributed by Dominique d'Humieres
+!
+program test_qp
+   use iso_fortran_env, only: real_kinds
+   implicit none
+   integer, parameter :: QP = real_kinds(ubound(real_kinds,dim=1))
+   real(kind=qp) :: a,b(2), c
+   integer :: exponent
+   character(len=180) :: tmp
+
+   ! Run this only with libquadmath; assume that all those systems
+   ! have also kind=10.
+   if (size (real_kinds) >= 4 .and. real_kinds(3) == 10 .and. qp == 16) then
+     exponent = 4000
+     b(:) = huge (1.0_qp)/10.0_qp**exponent
+!     print *, 'real(16) big value:      ', b(1)
+     write (tmp, *) b
+     read (tmp, *) a, c
+!     print *, 'same value read again:   ', a, c
+!     print *, 'difference: looks OK now ', a-b(1)
+     if (a-b(1) /= 0.0_qp .or. c-b(1) /= 0.0_qp) call abort()
+   end if
+end program test_qp