chrishkchris commented on a change in pull request #488: SINGA -475 add Sign
operator to singa
URL: https://github.com/apache/incubator-singa/pull/488#discussion_r311602138
##########
File path: test/python/test_operation.py
##########
@@ -610,6 +610,42 @@ def test_Atanh_gpu(self):
np.testing.assert_array_almost_equal(tensor.to_numpy(result), XT,
decimal=5)
self.check_shape(dx.shape(), (3, 2))
+ def test_Sign_cpu(self):
+ X = np.array([0.8, -1.2, 3.3, -3.6, -0.5, 0.5]).reshape(3,
2).astype(np.float32)
+ XT = np.sign(X)
+ DY = np.ones((3, 2), dtype = np.float32)
+
+ x = tensor.from_numpy(X)
+ dy = tensor.from_numpy(DY)
+ x.to_device(cpu_dev)
+ dy.to_device(cpu_dev)
+
+ result = autograd.sign(x)
+ dx = result.creator.backward(dy.data)
+ #dx = [x/|x|]'
+ DX = np.multiply(DY,0)
+
+ np.testing.assert_array_almost_equal(tensor.to_numpy(result), XT,
decimal=5)
+
np.testing.assert_array_almost_equal(tensor.to_numpy(tensor.from_raw_tensor(dx)),
DX, decimal=5)
+
+
+ def test_Sign_gpu(self):
+ X = np.array([0.8, -1.2, 3.3, -3.6, -0.5, 0.5]).reshape(3,
2).astype(np.float32)
+ XT = np.sign(X)
+ DY = np.ones((3, 2), dtype = np.float32)
+
+ x = tensor.from_numpy(X)
+ dy = tensor.from_numpy(DY)
+ x.to_device(gpu_dev)
+ dy.to_device(gpu_dev)
+
+ result = autograd.sign(x)
+ dx = result.creator.backward(dy.data)
+ #dx = [x/|x|]'
Review comment:
delete the comment line at 644:
#dx = [x/|x|]'
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