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! { dg-do run }
! testcase from PR 19032 adapted for testsuite
! Our implementation of modulo was wrong for P = 1 and P = -1,
! both in the real and the integer case
program main
  integer, parameter :: n=16
  real, dimension(n) :: ar, br, modulo_result, floor_result
  integer, dimension(n) :: ai, bi , imodulo_result, ifloor_result

  ai(1:4) = 5
  ai(5:8) = -5
  ai(9:12) = 1
  ai(13:16) = -1
  bi(1:4) = (/ 3,-3, 1, -1/)
  bi(5:8) = bi(1:4)
  bi(9:12) = bi(1:4)
  bi(13:16) = bi(1:4)
  ar = ai
  br = bi
  modulo_result = modulo(ar,br)
  imodulo_result = modulo(ai,bi)
  floor_result = ar-floor(ar/br)*br
  ifloor_result = nint(real(ai-floor(real(ai)/real(bi))*bi))

  do i=1,n
     if (modulo_result(i) /= floor_result(i) ) then
!        print "(A,4F5.0)" ,"real case failed: ", &
!             ar(i),br(i), modulo_result(i), floor_result(i)
        call abort()
    end if
    if (imodulo_result(i) /= ifloor_result(i)) then
!       print "(A,4I5)", "int case failed: ", &
!            ai(i), bi(i), imodulo_result(i), ifloor_result(i)
       call abort ()
     end if
  end do
end program main