flang/test/Evaluate/fold-nearest.f90

   1 ! RUN: %python %S/test_folding.py %s %flang_fc1
   2 ! Tests folding of NEAREST() and its relatives
   3 module m1
   4   real, parameter :: minSubnormal = 1.e-45
   5   logical, parameter :: test_1 = nearest(0., 1.) == minSubnormal
   6   logical, parameter :: test_2 = nearest(minSubnormal, -1.) == 0
   7   logical, parameter :: test_3 = nearest(1., 1.) == 1.0000001
   8   logical, parameter :: test_4 = nearest(1.0000001, -1.) == 1
   9   !WARN: warning: NEAREST intrinsic folding overflow
  10   real, parameter :: inf = nearest(huge(1.), 1.)
  11   !WARN: warning: NEAREST intrinsic folding: bad argument
  12   logical, parameter :: test_5 = nearest(inf, 1.) == inf
  13   !WARN: warning: NEAREST intrinsic folding: bad argument
  14   logical, parameter :: test_6 = nearest(-inf, -1.) == -inf
  15   logical, parameter :: test_7 = nearest(1.9999999, 1.) == 2.
  16   logical, parameter :: test_8 = nearest(2., -1.) == 1.9999999
  17   logical, parameter :: test_9 = nearest(1.9999999999999999999_10, 1.) == 2._10
  18   logical, parameter :: test_10 = nearest(-1., 1.) == -.99999994
  19   logical, parameter :: test_11 = nearest(-1., -2.) == -1.0000001
  20   real, parameter :: negZero = sign(0., -1.)
  21   logical, parameter :: test_12 = nearest(negZero, 1.) == minSubnormal
  22   logical, parameter :: test_13 = nearest(negZero, -1.) == -minSubnormal
  23   !WARN: warning: NEAREST: S argument is zero
  24   logical, parameter :: test_14 = nearest(0., negZero) == -minSubnormal
  25   !WARN: warning: NEAREST: S argument is zero
  26   logical, parameter :: test_15 = nearest(negZero, 0.) == minSubnormal
  27 end module
  28
  29 module m2
  30   use ieee_arithmetic, only: ieee_next_after
  31   real, parameter :: minSubnormal = 1.e-45
  32   logical, parameter :: test_0 = ieee_next_after(0., 0.) == 0.
  33   logical, parameter :: test_1 = ieee_next_after(0., 1.) == minSubnormal
  34   logical, parameter :: test_2 = ieee_next_after(minSubnormal, -1.) == 0
  35   logical, parameter :: test_3 = ieee_next_after(1., 2.) == 1.0000001
  36   logical, parameter :: test_4 = ieee_next_after(1.0000001, -1.) == 1
  37   !WARN: warning: division by zero
  38   real, parameter :: inf = 1. / 0.
  39   logical, parameter :: test_5 = ieee_next_after(inf, inf) == inf
  40   logical, parameter :: test_6 = ieee_next_after(inf, -inf) == inf
  41   logical, parameter :: test_7 = ieee_next_after(-inf, inf) == -inf
  42   logical, parameter :: test_8 = ieee_next_after(-inf, -1.) == -inf
  43   logical, parameter :: test_9 = ieee_next_after(1.9999999, 3.) == 2.
  44   logical, parameter :: test_10 = ieee_next_after(2., 1.) == 1.9999999
  45   logical, parameter :: test_11 = ieee_next_after(1.9999999999999999999_10, 3.) == 2._10
  46   logical, parameter :: test_12 = ieee_next_after(1., 1.) == 1.
  47   !WARN: warning: invalid argument on division
  48   real, parameter :: nan = 0. / 0.
  49   !WARN: warning: IEEE_NEXT_AFTER intrinsic folding: bad argument
  50   real, parameter :: x13 = ieee_next_after(nan, nan)
  51   logical, parameter :: test_13 = .not. (x13 == x13)
  52   !WARN: warning: IEEE_NEXT_AFTER intrinsic folding: bad argument
  53   real, parameter :: x14 = ieee_next_after(nan, 0.)
  54   logical, parameter :: test_14 = .not. (x14 == x14)
  55 end module
  56
  57 module m3
  58   use ieee_arithmetic, only: ieee_next_up, ieee_next_down
  59   real(kind(0.d0)), parameter :: minSubnormal = 5.d-324
  60   logical, parameter :: test_1 = ieee_next_up(0.d0) == minSubnormal
  61   logical, parameter :: test_2 = ieee_next_down(0.d0) == -minSubnormal
  62   logical, parameter :: test_3 = ieee_next_up(1.d0) == 1.0000000000000002d0
  63   logical, parameter :: test_4 = ieee_next_down(1.0000000000000002d0) == 1.d0
  64   !WARN: warning: division by zero
  65   real(kind(0.d0)), parameter :: inf = 1.d0 / 0.d0
  66   !WARN: warning: IEEE_NEXT_UP intrinsic folding overflow
  67   logical, parameter :: test_5 = ieee_next_up(huge(0.d0)) == inf
  68   !WARN: warning: IEEE_NEXT_DOWN intrinsic folding overflow
  69   logical, parameter :: test_6 = ieee_next_down(-huge(0.d0)) == -inf
  70   !WARN: warning: IEEE_NEXT_UP intrinsic folding: bad argument
  71   logical, parameter :: test_7 = ieee_next_up(inf) == inf
  72   !WARN: warning: IEEE_NEXT_DOWN intrinsic folding: bad argument
  73   logical, parameter :: test_8 = ieee_next_down(inf) == inf
  74   !WARN: warning: IEEE_NEXT_UP intrinsic folding: bad argument
  75   logical, parameter :: test_9 = ieee_next_up(-inf) == -inf
  76   !WARN: warning: IEEE_NEXT_DOWN intrinsic folding: bad argument
  77   logical, parameter :: test_10 = ieee_next_down(-inf) == -inf
  78   logical, parameter :: test_11 = ieee_next_up(1.9999999999999997d0) == 2.d0
  79   logical, parameter :: test_12 = ieee_next_down(2.d0) == 1.9999999999999997d0
  80   !WARN: warning: invalid argument on division
  81   real(kind(0.d0)), parameter :: nan = 0.d0 / 0.d0
  82   !WARN: warning: IEEE_NEXT_UP intrinsic folding: bad argument
  83   real(kind(0.d0)), parameter :: x13 = ieee_next_up(nan)
  84   logical, parameter :: test_13 = .not. (x13 == x13)
  85   !WARN: warning: IEEE_NEXT_DOWN intrinsic folding: bad argument
  86   real(kind(0.d0)), parameter :: x14 = ieee_next_down(nan)
  87   logical, parameter :: test_14 = .not. (x14 == x14)
  88 end module