add cpu strided slice

mindspore/ccsrc/kernel/cpu/cpu_kernel.h

@@ -47,6 +47,7 @@ const char TRANSPOSE_NO = 'N';
 const char TRANSPOSE_YES = 'T';
 const char AXIS[] = "axis";
 const char BEGIN[] = "begin";
+const char END[] = "end";
 const char SIZE[] = "size";
 
 class CPUKernel : public kernel::KernelMod {

mindspore/ccsrc/kernel/cpu/slice_cpu_kernel.cc

@@ -21,31 +21,53 @@ namespace mindspore {
 namespace kernel {
 void SliceCPUKernel::InitKernel(const CNodePtr &kernel_node) {
   CheckParam(kernel_node);
-
-  begin_ = AnfAlgo::GetNodeAttr<std::vector<int>>(kernel_node, BEGIN);
-  size_ = AnfAlgo::GetNodeAttr<std::vector<int>>(kernel_node, SIZE);
-
   input_shape_ = AnfAlgo::GetPrevNodeOutputInferShape(kernel_node, 0);
-  if (input_shape_.size() < 4) {
-    for (size_t i = 0; i < 4 - input_shape_.size(); ++i) {
-      input_shape_.insert(input_shape_.begin(), 1);
-      begin_.insert(begin_.begin(), 0);
-      size_.insert(size_.begin(), 1);
-    }
-  }
-
   output_shape_ = AnfAlgo::GetOutputInferShape(kernel_node, 0);
   CPUKernelUtils::ExpandDimsTo4(&output_shape_);
 
+  begin_ = AnfAlgo::GetNodeAttr<std::vector<int>>(kernel_node, BEGIN);
   for (size_t i = 0; i < begin_.size(); i++) {
     if (begin_[i] < 0) {
       begin_[i] = begin_[i] + input_shape_[i];
     }
   }
-
-  for (size_t i = 0; i < size_.size(); i++) {
-    if (size_[i] < 0) {
-      size_[i] = (size_[i] + input_shape_[i]) > 0 ? (size_[i] + input_shape_[i]) : 0;
+  auto prim = AnfAlgo::GetCNodePrimitive(kernel_node);
+  MS_EXCEPTION_IF_NULL(prim);
+  auto strides = prim->GetAttr(STRIDES);
+  if (strides != nullptr) {
+    strides_ = AnfAlgo::GetNodeAttr<std::vector<int>>(kernel_node, STRIDES);
+    end_ = AnfAlgo::GetNodeAttr<std::vector<int>>(kernel_node, END);
+    if (strides_.size() != end_.size() || strides_.size() != input_shape_.size()) {
+      MS_LOG(EXCEPTION) << "stride|end|input size must be equal";
+    }
+    for (size_t i = 0; i < strides_.size(); ++i) {
+      if (strides_[i] < 0) {
+        strides_[i] = (strides_[i] + input_shape_[i]) > 0 ? (strides_[i] + input_shape_[i]) : 0;
+      }
+      if (end_[i] < 0) {
+        end_[i] = (end_[i] + input_shape_[i]) > 0 ? (end_[i] + input_shape_[i]) : 0;
+      }
+    }
+  } else {
+    auto sizes = AnfAlgo::GetNodeAttr<std::vector<int>>(kernel_node, SIZE);
+    if (sizes.size() != input_shape_.size() || begin_.size() != input_shape_.size()) {
+      MS_LOG(EXCEPTION) << "begin|size|input size must be equal";
+    }
+    for (size_t i = 0; i < sizes.size(); ++i) {
+      if (sizes[i] < 0) {
+        sizes[i] = (sizes[i] + input_shape_[i]) > 0 ? (sizes[i] + input_shape_[i]) : 0;
+      }
+      strides_.emplace_back(1);
+      end_.emplace_back(begin_[i] + sizes[i]);
+    }
+  }
+  auto input_len = input_shape_.size();
+  if (input_len < 4) {
+    for (size_t i = 0; i < 4 - input_len; ++i) {
+      input_shape_.insert(input_shape_.begin(), 1);
+      begin_.insert(begin_.begin(), 0);
+      strides_.insert(strides_.begin(), 1);
+      end_.insert(end_.begin(), 1);
     }
   }
 }
@@ -56,10 +78,10 @@ bool SliceCPUKernel::Launch(const std::vector<kernel::AddressPtr> &inputs,
   auto input_addr = reinterpret_cast<float *>(inputs[0]->addr);
   auto output_addr = reinterpret_cast<float *>(outputs[0]->addr);
 
-  for (int i = begin_[0]; i < begin_[0] + size_[0]; ++i) {
-    for (int j = begin_[1]; j < begin_[1] + size_[1]; ++j) {
-      for (int k = begin_[2]; k < begin_[2] + size_[2]; ++k) {
-        for (int m = begin_[3]; m < begin_[3] + size_[3]; ++m) {
+  for (int i = begin_[0]; i < end_[0]; i += strides_[0]) {
+    for (int j = begin_[1]; j < end_[1]; j += strides_[1]) {
+      for (int k = begin_[2]; k < end_[2]; k += strides_[2]) {
+        for (int m = begin_[3]; m < end_[3]; m += strides_[3]) {
           auto offset = CPUKernelUtils::CalcOffset(input_shape_, i, j, k, m);
           *output_addr++ = input_addr[offset];
         }

mindspore/ccsrc/kernel/cpu/slice_cpu_kernel.h

@@ -35,13 +35,16 @@ class SliceCPUKernel : public CPUKernel {
  private:
   void CheckParam(const CNodePtr &kernel_node);
   std::vector<int> begin_;
-  std::vector<int> size_;
+  std::vector<int> end_;
+  std::vector<int> strides_;
   std::vector<size_t> input_shape_;
   std::vector<size_t> output_shape_;
 };
 
 MS_REG_CPU_KERNEL(Slice, KernelAttr().AddInputAttr(kNumberTypeFloat32).AddOutputAttr(kNumberTypeFloat32),
                   SliceCPUKernel);
+MS_REG_CPU_KERNEL(StridedSlice, KernelAttr().AddInputAttr(kNumberTypeFloat32).AddOutputAttr(kNumberTypeFloat32),
+                  SliceCPUKernel);
 }  // namespace kernel
 }  // namespace mindspore
 

mindspore/ccsrc/kernel/cpu/slice_grad_cpu_kernel.cc

@@ -21,33 +21,54 @@ namespace mindspore {
 namespace kernel {
 void SliceGradCPUKernel::InitKernel(const CNodePtr &kernel_node) {
   CheckParam(kernel_node);
-
-  begin_ = AnfAlgo::GetNodeAttr<std::vector<int>>(kernel_node, BEGIN);
-  size_ = AnfAlgo::GetNodeAttr<std::vector<int>>(kernel_node, SIZE);
-
-  input_dy_shape_ = AnfAlgo::GetPrevNodeOutputInferShape(kernel_node, 0);
-  if (input_dy_shape_.size() < 4) {
-    for (size_t i = 0; i < 4 - input_dy_shape_.size(); ++i) {
-      input_dy_shape_.insert(input_dy_shape_.begin(), 1);
-      begin_.insert(begin_.begin(), 0);
-      size_.insert(size_.begin(), 1);
-    }
-  }
-
-  input_x_shape_ = AnfAlgo::GetPrevNodeOutputInferShape(kernel_node, 1);
   output_dx_shape_ = AnfAlgo::GetOutputInferShape(kernel_node, 0);
-  CPUKernelUtils::ExpandDimsTo4(&input_x_shape_);
-  CPUKernelUtils::ExpandDimsTo4(&output_dx_shape_);
+  input_dy_shape_ = AnfAlgo::GetPrevNodeOutputInferShape(kernel_node, 0);
 
+  begin_ = AnfAlgo::GetNodeAttr<std::vector<int>>(kernel_node, BEGIN);
   for (size_t i = 0; i < begin_.size(); i++) {
     if (begin_[i] < 0) {
-      begin_[i] = begin_[i] + input_x_shape_[i];
+      begin_[i] = begin_[i] + output_dx_shape_[i];
     }
   }
 
-  for (size_t i = 0; i < size_.size(); i++) {
-    if (size_[i] < 0) {
-      size_[i] = (size_[i] + input_x_shape_[i]) > 0 ? (size_[i] + input_x_shape_[i]) : 0;
+  auto prim = AnfAlgo::GetCNodePrimitive(kernel_node);
+  MS_EXCEPTION_IF_NULL(prim);
+  auto strides = prim->GetAttr(STRIDES);
+  if (strides != nullptr) {
+    strides_ = AnfAlgo::GetNodeAttr<std::vector<int>>(kernel_node, STRIDES);
+    end_ = AnfAlgo::GetNodeAttr<std::vector<int>>(kernel_node, END);
+    if (strides_.size() != end_.size() || strides_.size() != output_dx_shape_.size()) {
+      MS_LOG(EXCEPTION) << "stride|end|input size must be equal";
+    }
+    for (size_t i = 0; i < strides_.size(); ++i) {
+      if (strides_[i] < 0) {
+        strides_[i] = (strides_[i] + output_dx_shape_[i]) > 0 ? (strides_[i] + output_dx_shape_[i]) : 0;
+      }
+      if (end_[i] < 0) {
+        end_[i] = (end_[i] + output_dx_shape_[i]) > 0 ? (end_[i] + output_dx_shape_[i]) : 0;
+      }
+    }
+  } else {
+    auto sizes = AnfAlgo::GetNodeAttr<std::vector<int>>(kernel_node, SIZE);
+    if (sizes.size() != output_dx_shape_.size() || begin_.size() != output_dx_shape_.size()) {
+      MS_LOG(EXCEPTION) << "begin|size|input size must be equal";
+    }
+    for (size_t i = 0; i < sizes.size(); ++i) {
+      if (sizes[i] < 0) {
+        sizes[i] = (sizes[i] + output_dx_shape_[i]) > 0 ? (sizes[i] + output_dx_shape_[i]) : 0;
+      }
+      strides_.emplace_back(1);
+      end_.emplace_back(begin_[i] + sizes[i]);
+    }
+  }
+  CPUKernelUtils::ExpandDimsTo4(&output_dx_shape_);
+  auto input_len = input_dy_shape_.size();
+  if (input_len < 4) {
+    for (size_t i = 0; i < 4 - input_len; ++i) {
+      input_dy_shape_.insert(input_dy_shape_.begin(), 1);
+      begin_.insert(begin_.begin(), 0);
+      strides_.insert(strides_.begin(), 1);
+      end_.insert(end_.begin(), 1);
     }
   }
 }
@@ -65,10 +86,10 @@ bool SliceGradCPUKernel::Launch(const std::vector<kernel::AddressPtr> &inputs,
     return false;
   }
 
-  for (int i = begin_[0]; i < begin_[0] + size_[0]; ++i) {
-    for (int j = begin_[1]; j < begin_[1] + size_[1]; ++j) {
-      for (int k = begin_[2]; k < begin_[2] + size_[2]; ++k) {
-        for (int m = begin_[3]; m < begin_[3] + size_[3]; ++m) {
+  for (int i = begin_[0]; i < end_[0]; i += strides_[0]) {
+    for (int j = begin_[1]; j < end_[1]; j += strides_[1]) {
+      for (int k = begin_[2]; k < end_[2]; k += strides_[2]) {
+        for (int m = begin_[3]; m < end_[3]; m += strides_[3]) {
           auto offset = CPUKernelUtils::CalcOffset(output_dx_shape_, i, j, k, m);
           output_dx_addr[offset] = *input_dy_addr++;
         }

mindspore/ccsrc/kernel/cpu/slice_grad_cpu_kernel.h

@@ -35,9 +35,9 @@ class SliceGradCPUKernel : public CPUKernel {
  private:
   void CheckParam(const CNodePtr &kernel_node);
   std::vector<int> begin_;
-  std::vector<int> size_;
+  std::vector<int> end_;
+  std::vector<int> strides_;
   std::vector<size_t> input_dy_shape_;
-  std::vector<size_t> input_x_shape_;
   std::vector<size_t> output_dx_shape_;
 };
 
@@ -45,6 +45,8 @@ MS_REG_CPU_KERNEL(
   SliceGrad,
   KernelAttr().AddInputAttr(kNumberTypeFloat32).AddInputAttr(kNumberTypeFloat32).AddOutputAttr(kNumberTypeFloat32),
   SliceGradCPUKernel);
+MS_REG_CPU_KERNEL(StridedSliceGrad, KernelAttr().AddInputAttr(kNumberTypeFloat32).AddOutputAttr(kNumberTypeFloat32),
+                  SliceGradCPUKernel);
 }  // namespace kernel
 }  // namespace mindspore
 

tests/st/ops/cpu/test_stridedslice_grad_op.py

@@ -0,0 +1,49 @@
+# Copyright 2020 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 pytest
+
+import mindspore.context as context
+import mindspore.nn as nn
+from mindspore import Tensor
+from mindspore.common.api import ms_function
+from mindspore.ops import operations as P
+from mindspore.ops.operations import _grad_ops as G
+
+context.set_context(mode=context.GRAPH_MODE, device_target='CPU')
+
+
+class StridedSliceGrad(nn.Cell):
+    def __init__(self):
+        super(StridedSliceGrad, self).__init__()
+        self.ssg = G.StridedSliceGrad()
+        self.shape = P.Shape()
+
+    @ms_function
+    def construct(self, dy, x):
+        return self.ssg(dy, self.shape(x), (2, 0, 0), (3, 2, 3), (1, 1, 1))
+
+
+@pytest.mark.level0
+@pytest.mark.platform_x86_cpu_training
+@pytest.mark.env_onecard
+def test_slice():
+    x = Tensor(np.array([[[1., 1., 1.], [2, 2, 2]], [[3, 3, 3], [4, 4, 4]], [[5, 5, 5], [6, 7, 8]]]).astype(np.float32))
+    dy = Tensor(np.array([[[5., 1., 5.], [6., 1., 8.]]]).astype(np.float32))
+    ssg = StridedSliceGrad()
+    output = ssg(dy, x)
+    expect = [[[0, 0, 0], [0, 0, 0]], [[0, 0, 0], [0, 0, 0]], [[5, 1, 5], [6, 1, 8]]]
+    assert (output.asnumpy() == expect).all()

tests/st/ops/cpu/test_stridedslice_op.py

@@ -0,0 +1,45 @@
+# Copyright 2020 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 pytest
+
+import mindspore.context as context
+import mindspore.nn as nn
+from mindspore import Tensor
+from mindspore.ops import operations as P
+
+context.set_context(mode=context.GRAPH_MODE, device_target='CPU')
+
+
+class StridedSlice(nn.Cell):
+    def __init__(self):
+        super(StridedSlice, self).__init__()
+        self.stridedslice = P.StridedSlice()
+
+    def construct(self, x):
+        return self.stridedslice(x, (2, 0, 0), (3, 2, 3), (1, 1, 1))
+
+
+@pytest.mark.level0
+@pytest.mark.platform_x86_cpu_training
+@pytest.mark.env_onecard
+def test_slice():
+    x = Tensor(np.array([[[1., 1., 1.], [2, 2, 2]], [[3, 3, 3], [4, 4, 4]], [[5, 5, 5], [6, 7, 8]]]).astype(np.float32))
+    stridedslice = StridedSlice()
+    output = stridedslice(x)
+    expect = [[[5., 5., 5.],
+               [6., 7., 8.]]]
+    assert (output.asnumpy() == expect).all()