Gpu support BroadcastTo kernel

mindspore/ccsrc/backend/kernel_compiler/gpu/arrays/broadcast_to_gpu_kernel.cc

@@ -0,0 +1,26 @@
+/**
+ * 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.
+ */
+
+#include "backend/kernel_compiler/gpu/arrays/broadcast_to_gpu_kernel.h"
+
+namespace mindspore {
+namespace kernel {
+MS_REG_GPU_KERNEL_ONE(BroadcastTo, KernelAttr().AddInputAttr(kNumberTypeFloat32).AddOutputAttr(kNumberTypeFloat32),
+                      BroadcastToGpuKernel, float)
+MS_REG_GPU_KERNEL_ONE(BroadcastTo, KernelAttr().AddInputAttr(kNumberTypeFloat16).AddOutputAttr(kNumberTypeFloat16),
+                      BroadcastToGpuKernel, half)
+}  // namespace kernel
+}  // namespace mindspore

mindspore/ccsrc/backend/kernel_compiler/gpu/arrays/broadcast_to_gpu_kernel.h

@@ -0,0 +1,83 @@
+/**
+ * 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.
+ */
+
+#ifndef MINDSPORE_CCSRC_KERNEL_GPU_BROADCAST_TO_GPU_KERNEL_H_
+#define MINDSPORE_CCSRC_KERNEL_GPU_BROADCAST_TO_GPU_KERNEL_H_
+
+#include <vector>
+#include "backend/kernel_compiler/gpu/gpu_kernel.h"
+#include "backend/kernel_compiler/gpu/gpu_kernel_factory.h"
+#include "backend/kernel_compiler/gpu/cuda_impl/broadcast_impl.cuh"
+
+namespace mindspore {
+namespace kernel {
+template <typename T>
+class BroadcastToGpuKernel : public GpuKernel {
+ public:
+  BroadcastToGpuKernel() {}
+  ~BroadcastToGpuKernel() = default;
+
+  const std::vector<size_t> &GetInputSizeList() const override { return input_size_list_; }
+  const std::vector<size_t> &GetOutputSizeList() const override { return output_size_list_; }
+  const std::vector<size_t> &GetWorkspaceSizeList() const override { return workspace_size_list_; }
+
+  bool Launch(const std::vector<AddressPtr> &inputs, const std::vector<AddressPtr> &,
+              const std::vector<AddressPtr> &outputs, void *stream_ptr) override {
+    T *input_addr = GetDeviceAddress<T>(inputs, 0);
+    T *output_addr = GetDeviceAddress<T>(outputs, 0);
+
+    BroadcastTo(input_shape_[0], input_shape_[1], input_shape_[2], input_shape_[3], output_shape_[0], output_shape_[1],
+                output_shape_[2], output_shape_[3], input_addr, output_addr,
+                reinterpret_cast<cudaStream_t>(stream_ptr));
+    return true;
+  }
+  bool Init(const CNodePtr &kernel_node) override {
+    auto input_shapes = AnfAlgo::GetPrevNodeOutputInferShape(kernel_node, 0);
+    auto output_shapes = AnfAlgo::GetOutputInferShape(kernel_node, 0);
+    if (input_shapes.size() > 4 || output_shapes.size() > 4) {
+      MS_LOG(EXCEPTION) << "BroadcastTo operation not support dim greater than 4";
+    }
+
+    for (int i = input_shapes.size() - 1; i >= 0; i--) {
+      input_shape_[i] = input_shapes[i];
+    }
+
+    for (int j = output_shapes.size() - 1; j >= 0; j--) {
+      output_shape_[j] = output_shapes[j];
+    }
+
+    InitSizeLists();
+    return true;
+  }
+
+ protected:
+  void InitSizeLists() override {
+    input_size_list_.push_back(input_shape_[0] * input_shape_[1] * input_shape_[2] * input_shape_[3] * sizeof(T));
+    output_size_list_.push_back(output_shape_[0] * output_shape_[1] * output_shape_[2] * output_shape_[3] * sizeof(T));
+  }
+
+ private:
+  int input_shape_[4] = {1, 1, 1, 1};
+  int output_shape_[4] = {1, 1, 1, 1};
+
+  std::vector<size_t> input_size_list_;
+  std::vector<size_t> output_size_list_;
+  std::vector<size_t> workspace_size_list_;
+};
+}  // namespace kernel
+}  // namespace mindspore
+
+#endif  // MINDSPORE_CCSRC_KERNEL_GPU_BROADCAST_TO_GPU_KERNEL_H_

mindspore/ccsrc/backend/kernel_compiler/gpu/cuda_impl/broadcast_impl.cu

@@ -176,6 +176,28 @@ void NoBroadcast(const int &nums, enum BroadcastOpType op, const T *input0, cons
   NoBroadcastKernel<<<GET_BLOCKS(nums), GET_THREADS, 0, stream>>>(nums, op, input0, input1, output);
 }
 
+template <typename T>
+__global__ void BroadcastToKernel(const int i0, const int i1, const int i2, const int i3, const int o0,
+                                  const int o1, const int o2, const int o3, const T *input_addr, T *output_addr) {
+  for (size_t pos = blockIdx.x * blockDim.x + threadIdx.x; pos < o0 * o1 * o2 * o3; pos += blockDim.x * gridDim.x) {
+    int i = pos / (o1 * o2 * o3) % o0;
+    int j = pos / (o2 * o3) % o1;
+    int k = pos / o3 % o2;
+    int l = pos % o3;
+
+    int input_idx = Index(i, i0) * i1 * i2 * i3 + Index(j, i1) * i2 * i3 + Index(k, i2) * i3 + Index(l, i3);
+    output_addr[pos] = input_addr[input_idx];
+  }
+}
+
+template <typename T>
+void BroadcastTo(const int &i0, const int &i1, const int &i2, const int &i3, const int &o0, const int &o1,
+                 const int &o2, const int &o3, const T *input_addr, T *output_addr, cudaStream_t stream) {
+  int nums = o0 * o1 * o2 * o3;
+  BroadcastToKernel<<<GET_BLOCKS(nums), GET_THREADS, 0, stream>>>(i0, i1, i2, i3, o0, o1, o2, o3, input_addr,
+                                                                  output_addr);
+}
+
 template void Broadcast(const int &l0, const int &l1, const int &l2, const int &l3, const int &r0, const int &r1,
                         const int &r2, const int &r3, const int &d0, const int &d1, const int &d2, const int &d3,
                         enum BroadcastOpType op, const float *input0, const float *input1, bool *output,
@@ -204,5 +226,11 @@ template void NoBroadcast(const int &nums, enum BroadcastOpType op, const half *
                           bool *output, cudaStream_t stream);
 template void NoBroadcast(const int &nums, enum BroadcastOpType op, const half *input0, const half *input1,
                           half *output, cudaStream_t stream);
-template void NoBroadcast(const int &nums, enum BroadcastOpType op, const int *input0, const int *input1,
+template void NoBroadcast(const int &nums, enum BroadcastOpType op, const int *input0, const int *input1, int *output,
-                          int *output, cudaStream_t stream);
+                          cudaStream_t stream);
+
+template void BroadcastTo(const int &i0, const int &i1, const int &i2, const int &i3, const int &o0, const int &o1,
+                          const int &o2, const int &o3, const float *input_addr, float *output_addr,
+                          cudaStream_t stream);
+template void BroadcastTo(const int &i0, const int &i1, const int &i2, const int &i3, const int &o0, const int &o1,
+                          const int &o2, const int &o3, const half *input_addr, half *output_addr, cudaStream_t stream);

mindspore/ccsrc/backend/kernel_compiler/gpu/cuda_impl/broadcast_impl.cuh

@@ -41,4 +41,8 @@ template <typename T, typename S>
 void NoBroadcast(const int &size, enum BroadcastOpType op, const T *input0, const T *input1, S *output,
                  cudaStream_t stream);
 
+template <typename T>
+void BroadcastTo(const int &i0, const int &i1, const int &i2, const int &i3, const int &o0, const int &o1,
+                 const int &o2, const int &o3, const T *input_addr, T *output_addr, cudaStream_t stream);
+
 #endif  // MINDSPORE_CCSRC_KERNEL_GPU_CUDA_IMPL_BROADCAST_H_

tests/st/ops/gpu/test_broadcast_to_ops.py

@@ -0,0 +1,40 @@
+# 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
+from mindspore.common.tensor import Tensor
+from mindspore.ops import operations as P
+
+
+@pytest.mark.level0
+@pytest.mark.platform_x86_gpu_training
+@pytest.mark.env_onecard
+def test_broadcast():
+    context.set_context(mode=context.GRAPH_MODE, device_target='GPU')
+
+    x_np = np.random.rand(3, 1, 5, 1).astype(np.float32)
+    shape = (3, 4, 5, 6)
+
+    output = P.BroadcastTo(shape)(Tensor(x_np))
+    expect = np.broadcast_to(x_np, shape)
+    assert np.allclose(output.asnumpy(), expect)
+
+    x1_np = np.random.rand(3, 1, 5, 1).astype(np.float16)
+    output = P.BroadcastTo(shape)(Tensor(x1_np))
+    expect = np.broadcast_to(x1_np, shape)
+    assert np.allclose(output.asnumpy(), expect)