From 5a9dd8ae5a5154a4e2a96becc057621a6221ca55 Mon Sep 17 00:00:00 2001
From: gongweibao <weibao.gong@gmail.com>
Date: Tue, 17 Oct 2017 03:48:34 +0000
Subject: [PATCH] add gpu

---
 paddle/operators/block_expand_op.cc | 15 ++++++++--
 paddle/operators/block_expand_op.cu | 24 +++++++++++++++
 paddle/operators/block_expand_op.h  | 46 +++++++++++++++++++++++++----
 3 files changed, 77 insertions(+), 8 deletions(-)

diff --git a/paddle/operators/block_expand_op.cc b/paddle/operators/block_expand_op.cc
index b3fad3c81f..49c7011fe1 100644
--- a/paddle/operators/block_expand_op.cc
+++ b/paddle/operators/block_expand_op.cc
@@ -109,7 +109,18 @@ class BlockExpandGradOp : public framework::OperatorWithKernel {
   using framework::OperatorWithKernel::OperatorWithKernel;
 
  protected:
-  void InferShape(framework::InferShapeContext* ctx) const override {}
+  void InferShape(framework::InferShapeContext* ctx) const override {
+    using namespace framework;
+    PADDLE_ENFORCE(ctx->HasInput("X"), "Input(X) should not be null");
+    PADDLE_ENFORCE(ctx->HasOutput("Out"),
+                   "Output of BlockExpandOp op should not be null.");
+    PADDLE_ENFORCE(ctx->HasInput(framework::GradVarName("Out")),
+                   "Input(Out@GRAD) should not be null");
+
+    auto in_dim = ctx->GetInputDim("X");
+
+    ctx->SetOutputDim(GradVarName("Out"), in_dim);
+  }
 };
 
 }  // namespace operators
@@ -117,7 +128,7 @@ class BlockExpandGradOp : public framework::OperatorWithKernel {
 
 namespace ops = paddle::operators;
 REGISTER_OP(block_expand, ops::BlockExpandOp, ops::BlockExpandOpMaker,
-            block_expand_grad, ops::BlockExpandOpGrad);
+            block_expand_grad, ops::BlockExpandGradOp);
 REGISTER_OP_CPU_KERNEL(
     block_expand, ops::BlockExpandKernel<paddle::platform::CPUPlace, float>);
 REGISTER_OP_CPU_KERNEL(
diff --git a/paddle/operators/block_expand_op.cu b/paddle/operators/block_expand_op.cu
index e69de29bb2..492ac0c9b2 100644
--- a/paddle/operators/block_expand_op.cu
+++ b/paddle/operators/block_expand_op.cu
@@ -0,0 +1,24 @@
+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserve.
+
+   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. */
+
+#define EIGEN_USE_GPU
+#include "paddle/operators/block_expand_op.h"
+
+namespace ops = paddle::operators;
+
+REGISTER_OP_GPU_KERNEL(
+    block_expand, ops::BlockExpandKernel<paddle::platform::GPUPlace, float>);
+REGISTER_OP_GPU_KERNEL(
+    block_expand_grad,
+    ops::BlockExpandGradKernel<paddle::platform::GPUPlace, float>);
diff --git a/paddle/operators/block_expand_op.h b/paddle/operators/block_expand_op.h
index bd6b307852..b272582883 100644
--- a/paddle/operators/block_expand_op.h
+++ b/paddle/operators/block_expand_op.h
@@ -69,12 +69,12 @@ class BlockExpandKernel : public framework::OpKernel<T> {
         stride_width, padding_height, padding_width, outputHeight, outputWidth);
 
     for (int i = 0; i < N; i++) {
-      Tensor src = in->Slice<T>(i, i + 1).Resize(C, img_height, img_width);
-      Tensor dst = out->Slice<T>(i, i + 1).Resize(outputHeight, outputWidth, C,
-                                                  block_height, block_width);
-      math::Im2ColFunctor<math::ColFormat::kOCF, Place, T>(
-          ctx, src, dst, stride_height, stride_width, padding_height,
-          padding_width);
+      Tensor src = in->Slice<T>(i, i + 1).Resize({C, img_height, img_width});
+      Tensor dst = out->Slice<T>(i, i + 1).Resize(
+          {outputHeight, outputWidth, C, block_height, block_width});
+      math::Im2ColFunctor<math::ColFormat::kOCF, Place, T> f;
+      f(ctx.device_context(), src, dst, stride_height, stride_width,
+        padding_height, padding_width);
     }
   }
 };
@@ -84,6 +84,40 @@ class BlockExpandGradKernel : public framework::OpKernel<T> {
  public:
   void Compute(const framework::ExecutionContext& ctx) const override {
     using namespace framework;
+    auto* in = ctx.Input<Tensor>("X");
+    auto* out = ctx.Input<Tensor>("Out");
+    auto* out_grad = ctx.Output<Tensor>(GradVarName("Out"));
+    out_grad->mutable_data<T>(ctx.GetPlace());
+
+    auto in_dim = in->dims();
+    int N = in_dim[0];
+    int C = in_dim[1];
+    int img_height = in_dim[2];
+    int img_width = in_dim[3];
+
+    int block_height = ctx.Attr<int>("blockHeight");
+    int block_width = ctx.Attr<int>("blockWidth");
+    int stride_height = ctx.Attr<int>("strideHeight");
+    int stride_width = ctx.Attr<int>("strideWidth");
+    int padding_height = ctx.Attr<int>("paddingHeight");
+    int padding_width = ctx.Attr<int>("paddingWidth");
+
+    int outputHeight = 0;
+    int outputWidth = 0;
+
+    get_blockexpand_output_shape(
+        img_height, img_width, block_height, block_width, stride_height,
+        stride_width, padding_height, padding_width, outputHeight, outputWidth);
+
+    for (int i = 0; i < N; i++) {
+      Tensor dst =
+          out_grad->Slice<T>(i, i + 1).Resize({C, img_height, img_width});
+      Tensor src = out->Slice<T>(i, i + 1).Resize(
+          {outputHeight, outputWidth, C, block_height, block_width});
+      math::Im2ColFunctor<math::ColFormat::kOCF, Place, T> f;
+      f(ctx.device_context(), src, dst, stride_height, stride_width,
+        padding_height, padding_width);
+    }
   }
 };
 
-- 
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