ported old paddle gpu bilinear_interp

paddle/fluid/operators/bilinear_interp_op.cu

@@ -9,7 +9,7 @@
    See the License for the specific language governing permissions and
    limitations under the License. */
 
-#include "hl_cnn.h"
+#include "paddle/fluid/operators/bilinear_interp_op.cu.h"
 #include "paddle/fluid/operators/bilinear_interp_op.h"
 
 namespace paddle {
@@ -44,9 +44,13 @@ class BilinearInterpOpCUDAKernel : public framework::OpKernel<T> {
     if (in_h == out_h && in_w == out_w) {
       memcpy(output, input, input_t->numel() * sizeof(T));
     } else {
-      hl_bilinear_forward(input, in_h, in_w, batch_size, in_chw, output, out_h,
-                          out_w, batch_size, out_chw, channels, ratio_h,
-                          ratio_w);
+      int threadNum = batch_size * out_chw;
+      int blocks = (threadNum + 1024 - 1) / 1024;
+
+      KeBilinearInterpFw<
+          T><<<blocks, 1024, 0, ctx.cuda_device_context().stream()>>>(
+          input, in_h, in_w, batch_size, in_chw, output, out_h, out_w,
+          batch_size, out_chw, channels, ratio_h, ratio_w);
     }
   }
 };
@@ -78,9 +82,13 @@ class BilinearInterpGradOpCUDAKernel : public framework::OpKernel<T> {
     if (in_h == out_h && in_w == out_w) {
       memcpy(d_input, d_output, d_input_t->numel() * sizeof(T));
     } else {
-      hl_bilinear_backward(d_input, in_h, in_w, batch_size, in_chw, d_output,
-                           out_h, out_w, batch_size, out_chw, channels, ratio_h,
-                           ratio_w);
+      int threadNum = batch_size * out_chw;
+      int blocks = (threadNum + 1024 - 1) / 1024;
+
+      KeBilinearInterpBw<
+          T><<<blocks, 1024, 0, ctx.cuda_device_context().stream()>>>(
+          d_input, in_h, in_w, batch_size, in_chw, d_output, out_h, out_w,
+          batch_size, out_chw, channels, ratio_h, ratio_w);
     }
   }
 };

paddle/fluid/operators/bilinear_interp_op.cu.h

+/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved.
+
+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. */
+
+#pragma once
+#include "paddle/fluid/framework/tensor.h"
+#include "paddle/fluid/platform/cuda_helper.h"
+#include "paddle/fluid/platform/place.h"
+
+namespace paddle {
+namespace operators {
+
+using Tensor = framework::Tensor;
+
+template <typename T>
+__global__ void KeBilinearInterpFw(const T* in, const size_t inImgH,
+                                   const size_t inImgW, const size_t inputH,
+                                   const size_t inputW, T* out,
+                                   const size_t outImgH, const size_t outImgW,
+                                   const size_t outputH, const size_t outputW,
+                                   const size_t numChannels, const T ratioH,
+                                   const T ratioW) {
+  int nthreads = outputH * outputW;
+  int tid = blockIdx.x * blockDim.x + threadIdx.x;
+  if (tid < nthreads) {
+    int outIdH = tid / outputW;
+    int outIdW = tid % outputW;
+    int inImgSize = inputW / numChannels;
+    int outImgSize = outputW / numChannels;
+    int channelId = outIdW / outImgSize;
+
+    int outImgIdy = (outIdW % outImgSize) / outImgW;
+    int inImgIdy = ratioH * outImgIdy;
+    int hId = (inImgIdy < inImgH - 1) ? 1 : 0;
+    T h1lambda = ratioH * outImgIdy - inImgIdy;
+    T h2lambda = 1.f - h1lambda;
+
+    int outImgIdx = tid % outImgW;
+    int inImgIdx = ratioW * outImgIdx;
+    int wId = (inImgIdx < inImgW - 1) ? 1 : 0;
+    T w1lambda = ratioW * outImgIdx - inImgIdx;
+    T w2lambda = 1.f - w1lambda;
+
+    const T* inPos = &in[outIdH * inputW + channelId * inImgSize +
+                         inImgIdy * inImgW + inImgIdx];
+
+    // bilinear interpolation
+    out[outIdH * outputW + outIdW] =
+        h2lambda * (w2lambda * inPos[0] + w1lambda * inPos[wId]) +
+        h1lambda * (w2lambda * inPos[hId * inImgW] +
+                    w1lambda * inPos[hId * inImgW + wId]);
+  }
+}
+
+template <typename T>
+__global__ void KeBilinearInterpBw(T* in, const size_t inImgH,
+                                   const size_t inImgW, const size_t inputH,
+                                   const size_t inputW, const T* out,
+                                   const size_t outImgH, const size_t outImgW,
+                                   const size_t outputH, const size_t outputW,
+                                   const size_t numChannels, const T ratioH,
+                                   const T ratioW) {
+  int nthreads = outputH * outputW;
+  int tid = blockIdx.x * blockDim.x + threadIdx.x;
+  if (tid < nthreads) {
+    int outIdH = tid / outputW;
+    int outIdW = tid % outputW;
+    int inImgSize = inputW / numChannels;
+    int outImgSize = outputW / numChannels;
+    int channelId = outIdW / outImgSize;
+
+    int outImgIdy = (outIdW % outImgSize) / outImgW;
+    int inImgIdy = ratioH * outImgIdy;
+    int hId = (inImgIdy < inImgH - 1) ? 1 : 0;
+    T h1lambda = ratioH * outImgIdy - inImgIdy;
+    T h2lambda = 1.f - h1lambda;
+
+    int outImgIdx = tid % outImgW;
+    int inImgIdx = ratioW * outImgIdx;
+    int wId = (inImgIdx < inImgW - 1) ? 1 : 0;
+    T w1lambda = ratioW * outImgIdx - inImgIdx;
+    T w2lambda = 1.f - w1lambda;
+
+    T* inPos = &in[outIdH * inputW + channelId * inImgSize + inImgIdy * inImgW +
+                   inImgIdx];
+    const T* outPos = &out[outIdH * outputW + outIdW];
+    atomicAdd(&inPos[0], h2lambda * w2lambda * outPos[0]);
+    atomicAdd(&inPos[wId], h2lambda * w1lambda * outPos[0]);
+    atomicAdd(&inPos[hId * inImgW], h1lambda * w2lambda * outPos[0]);
+    atomicAdd(&inPos[hId * inImgW + wId], h1lambda * w1lambda * outPos[0]);
+  }
+}
+
+}  // namespace operators
+}  // namespace paddle