fix dynload for cufft on windows (#51)

1. fix dynload for cufft on windows;
2. fix unittests.

Author: Feiyu Chan

paddle/fluid/platform/dynload/dynamic_loader.cc

@@ -109,6 +109,9 @@ static constexpr char* win_cusolver_lib =
 static constexpr char* win_cusparse_lib =
     "cusparse64_" CUDA_VERSION_MAJOR CUDA_VERSION_MINOR
     ".dll;cusparse64_" CUDA_VERSION_MAJOR ".dll;cusparse64_10.dll";
+static constexpr char* win_cufft_lib =
+    "cufft64_" CUDA_VERSION_MAJOR CUDA_VERSION_MINOR
+    ".dll;cufft64_" CUDA_VERSION_MAJOR ".dll;cufft64_10.dll";
 #else
 static constexpr char* win_curand_lib =
     "curand64_" CUDA_VERSION_MAJOR CUDA_VERSION_MINOR
@@ -122,7 +125,9 @@ static constexpr char* win_cusolver_lib =
 static constexpr char* win_cusparse_lib =
     "cusparse64_" CUDA_VERSION_MAJOR CUDA_VERSION_MINOR
     ".dll;cusparse64_" CUDA_VERSION_MAJOR ".dll";
-static constexpr char* win_cufft_lib = "cufft64_" CUDA_MAJOR_VERSION ".dll";
+static constexpr char* win_cufft_lib =
+    "cufft64_" CUDA_VERSION_MAJOR CUDA_VERSION_MINOR
+    ".dll;cufft64_" CUDA_VERSION_MAJOR ".dll";
 #endif  // CUDA_VERSION
 #endif
 

python/paddle/fluid/tests/unittests/fft/test_fft.py

@@ -534,8 +534,8 @@ def test_hfft2(self):
     [('test_n_nagative',
       np.random.randn(4, 4, 4) + 1j * np.random.randn(4, 4, 4), (-1, -2),
       (-2, -1), 'backward', ValueError), \
-     ('test_n_equal_input_length',
-     np.random.randn(4, 4, 4) + 1j * np.random.randn(4, 4, 4), (2, 1), (-2, -1),
+     ('test_zero_point',
+     np.random.randn(4, 4, 1) + 1j * np.random.randn(4, 4, 1), None, (-2, -1),
      "backward", ValueError), \
      ('test_n_zero', np.random.randn(4, 4, 4) + 1j * np.random.randn(4, 4, 4),
       (0, 0), (-2, -1), 'backward', ValueError), \