gcc/testsuite/gfortran.dg/intrinsic_modulo_1.f90

   1 ! { dg-do run }
   2 ! testcase from PR 19032 adapted for testsuite
   3 ! Our implementation of modulo was wrong for P = 1 and P = -1,
   4 ! both in the real and the integer case
   5 program main
   6   integer, parameter :: n=16
   7   real, dimension(n) :: ar, br, modulo_result, floor_result
   8   integer, dimension(n) :: ai, bi , imodulo_result, ifloor_result
   9
  10   ai(1:4) = 5
  11   ai(5:8) = -5
  12   ai(9:12) = 1
  13   ai(13:16) = -1
  14   bi(1:4) = (/ 3,-3, 1, -1/)
  15   bi(5:8) = bi(1:4)
  16   bi(9:12) = bi(1:4)
  17   bi(13:16) = bi(1:4)
  18   ar = ai
  19   br = bi
  20   modulo_result = modulo(ar,br)
  21   imodulo_result = modulo(ai,bi)
  22   floor_result = ar-floor(ar/br)*br
  23   ifloor_result = nint(real(ai-floor(real(ai)/real(bi))*bi))
  24
  25   do i=1,n
  26      if (modulo_result(i) /= floor_result(i) ) then
  27 !        print "(A,4F5.0)" ,"real case failed: ", &
  28 !             ar(i),br(i), modulo_result(i), floor_result(i)
  29         STOP 1
  30     end if
  31     if (imodulo_result(i) /= ifloor_result(i)) then
  32 !       print "(A,4I5)", "int case failed: ", &
  33 !            ai(i), bi(i), imodulo_result(i), ifloor_result(i)
  34        STOP 2
  35      end if
  36   end do
  37 end program main