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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