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! { 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
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