add embedinglookup primitive

mindspore/ops/operations/__init__.py

@@ -26,7 +26,7 @@ from .array_ops import (Argmax, Argmin, Cast, Concat, Pack, Unpack,
                         Rank, Reshape, ResizeNearestNeighbor, ArgMinWithValue, Range,
                         SameTypeShape, ScatterAdd, ScatterMax, ScatterUpdate,
                         ScalarToArray, ScalarToTensor, ScatterNd, ScatterNdUpdate, Select,
-                        Shape, Size, Slice, Split,
+                        Shape, Size, Slice, Split, EmbeddingLookup,
                         Squeeze, StridedSlice, Tile,
                         Transpose, TruncatedNormal, TupleToArray, UnsortedSegmentMin,
                         UnsortedSegmentSum, SpaceToDepth, DepthToSpace, SpaceToBatch, BatchToSpace,
@@ -131,6 +131,7 @@ __all__ = [
     'ReduceMean',
     'Range',
     'LayerNorm',
+    'EmbeddingLookup',
     'Rank',
     'Less',
     'LessEqual',

mindspore/ops/operations/array_ops.py

@@ -572,6 +572,73 @@ class Range(PrimitiveWithInfer):
         return x_dtype
 
 
+class EmbeddingLookup(PrimitiveWithInfer):
+    """
+    Returns a slice of input tensor based on the specified indices and axis. This Primitive has the similar
+    functionality as GatherV2, but has three more inputs: `offset`, `reduce_scatter_flag` and `split_num`.
+
+    Inputs:
+        - **input_params** (Tensor) - The shape of tensor is :math:`(x_1, x_2, ..., x_R)`.
+          The Tensor slice, instead of the entire Tensor.
+        - **input_indices** (Tensor) - The shape of tensor is :math:`(y_1, y_2, ..., y_S)`.
+          Specifies the indices of elements of the original Tensor. Must be in the range
+          `[0, input_param.shape()[axis])`.
+        - **axis** (int) - Specifies the dimension index to gather indices.
+        - **offset** (int) - Specifies the offset value of this `input_params` slice. Thus the real indices
+          are equal to `input_indices` minus `offset`.
+        - **reduce_scatter_flag** (bool) - Specifies whether perform reduce_scatter on host or not.
+        - **split_num** (int) - Specifies the number of partitions of the reduce_scatter produces. This variable
+          is used only if `reduce_scatter_flag` is True.
+
+
+    Outputs:
+        Tensor, the shape of tensor is :math:`(z_1, z_2, ..., z_N)`.
+
+    Examples:
+        >>> input_params = Tensor(np.array([[8, 9], [10, 11], [12, 13], [14, 15]]), mindspore.float32)
+        >>> input_indices = Tensor(np.array([[5, 2], [8, 5]]), mindspore.int32)
+        >>> axis = 0
+        >>> offset = 4
+        >>> reduce_scatter_flag = False
+        >>> split_num = 1
+        >>> out = P.EmbeddingLookup()(input_params, input_indices, axis, offset, reduce_scatter_flag, split_num)
+        [[[10, 11], [0 ,0]], [[0, 0], [10, 11]]]
+    """
+    @prim_attr_register
+    def __init__(self):
+        """init index_select"""
+        self.__setattr_flag__ = True
+        self.init_prim_io_names(inputs=['params', 'indices', 'axis', 'offset', 'reduce_scatter_flag', 'split_num'],
+                                outputs=['output'])
+        self.add_prim_attr('target', 'CPU')
+
+    def __infer__(self, params, indices, axis, offset, reduce_scatter_flag=False, split_num=2):
+        validator.check_subclass("params", params['dtype'], mstype.tensor, self.name)
+        validator.check_tensor_type_same({"indices": indices['dtype']}, mstype.int_type, self.name)
+        validator.check_subclass("axis", axis['dtype'], mstype.int_, self.name)
+        validator.check_subclass("offset", offset['dtype'], mstype.int_, self.name)
+        validator.check_subclass("split_num", split_num['dtype'], mstype.int_, self.name)
+        if split_num['value'] < 1:
+            raise ValueError("The parameter 'split_num' must be positive, but got %d." % split_num)
+        axis_v = axis['value']
+        params_shp = params['shape']
+        rank = len(params_shp)
+        validator.check_int_range("axis", axis_v, -rank, rank, Rel.INC_LEFT, self.name)
+        if axis_v < 0:
+            axis_v += rank
+        out_shape = params_shp[:axis_v] + indices['shape'] + params_shp[axis_v + 1:]
+        if reduce_scatter_flag:
+            # partition the tensor along the dimension 0.
+            if out_shape[0] % split_num['value'] != 0:
+                raise ValueError("The dimension 0 of the shape: %d, is not divisible by split_num: %d." %
+                                 (out_shape[0], split_num['value']))
+            out_shape[0] = out_shape[0] // split_num['value']
+        out = {'shape': out_shape,
+               'dtype': params['dtype'],
+               'value': None}
+        return out
+
+
 class Split(PrimitiveWithInfer):
     """
     Splits input tensor into output_num of tensors along the given axis and output numbers.

tests/ut/python/parallel/test_embeddinglookup.py

@@ -0,0 +1,79 @@
+# Copyright 2019 Huawei Technologies Co., Ltd
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+# ============================================================================
+import numpy as np
+
+import mindspore as ms
+import mindspore.nn as nn
+from mindspore import Tensor
+from mindspore import context
+from mindspore.common.api import _executor
+from mindspore.ops import composite as C
+from mindspore.ops import operations as P
+from tests.ut.python.ops.test_math_ops import VirtualLoss
+
+
+class NetWithLoss(nn.Cell):
+    def __init__(self, network):
+        super(NetWithLoss, self).__init__()
+        self.loss = VirtualLoss()
+        self.network = network
+
+    def construct(self, x, y):
+        predict = self.network(x, y)
+        return self.loss(predict)
+
+class Net(nn.Cell):
+    def __init__(self, shape, axis, offset, reduce_scatter_flag, split_num):
+        super().__init__()
+        self.index = Tensor(np.ones(shape), dtype=ms.int32)
+        self.axis = axis
+        self.offset = offset
+        self.reduce_scatter_flag = reduce_scatter_flag
+        self.split_num = split_num
+        self.elu = P.EmbeddingLookup()
+        self.mm = P.BatchMatMul()
+
+    def construct(self, x, y):
+        out = self.elu(x, self.index, self.axis, self.offset, self.reduce_scatter_flag, self.split_num)
+        out = self.mm(out, y)
+        return out
+
+
+def test_embeddinglookup_reducescatter_false():
+    shape = [8, 8]
+    axis = 0
+    offset = 8
+    reduce_scatter_flag = False
+    split_num = 1
+    net = NetWithLoss(Net(shape, axis, offset, reduce_scatter_flag, split_num))
+    net.set_auto_parallel()
+
+    x = Tensor(np.ones([64, 32]), dtype=ms.float32)
+    y = Tensor(np.ones([8, 32, 8]), dtype=ms.float32)
+    _executor.compile(net, x, y)
+
+
+def test_embeddinglookup_reducescatter_true():
+    shape = [8, 8]
+    axis = 0
+    offset = 8
+    reduce_scatter_flag = True
+    split_num = 8
+    net = NetWithLoss(Net(shape, axis, offset, reduce_scatter_flag, split_num))
+    net.set_auto_parallel()
+
+    x = Tensor(np.ones([64, 32]), dtype=ms.float32)
+    y = Tensor(np.ones([1, 32, 8]), dtype=ms.float32)
+    _executor.compile(net, x, y)