From a392bbd0c957a00e3782c96e7ced84a29ff9dd88 Mon Sep 17 00:00:00 2001
From: Joseph Redmon <pjreddie@gmail.com>
Date: Tue, 15 Mar 2016 05:33:02 +0000
Subject: [PATCH] Play along w/ alphago

---
 src/maxpool_layer_kernels.cu |   14 +++++++++-----
 1 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/src/maxpool_layer_kernels.cu b/src/maxpool_layer_kernels.cu
index a5c8209..331a5e2 100644
--- a/src/maxpool_layer_kernels.cu
+++ b/src/maxpool_layer_kernels.cu
@@ -1,3 +1,7 @@
+#include "cuda_runtime.h"
+#include "curand.h"
+#include "cublas_v2.h"
+
 extern "C" {
 #include "maxpool_layer.h"
 #include "cuda.h"
@@ -77,10 +81,10 @@
             d += (valid && indexes[out_index] == index) ? delta[out_index] : 0;
         }
     }
-    prev_delta[index] = d;
+    prev_delta[index] += d;
 }
 
-extern "C" void forward_maxpool_layer_gpu(maxpool_layer layer, float *input)
+extern "C" void forward_maxpool_layer_gpu(maxpool_layer layer, network_state state)
 {
     int h = (layer.h-1)/layer.stride + 1;
     int w = (layer.w-1)/layer.stride + 1;
@@ -88,15 +92,15 @@
 
     size_t n = h*w*c*layer.batch;
 
-    forward_maxpool_layer_kernel<<<cuda_gridsize(n), BLOCK>>>(n, layer.h, layer.w, layer.c, layer.stride, layer.size, input, layer.output_gpu, layer.indexes_gpu);
+    forward_maxpool_layer_kernel<<<cuda_gridsize(n), BLOCK>>>(n, layer.h, layer.w, layer.c, layer.stride, layer.size, state.input, layer.output_gpu, layer.indexes_gpu);
     check_error(cudaPeekAtLastError());
 }
 
-extern "C" void backward_maxpool_layer_gpu(maxpool_layer layer, float * delta)
+extern "C" void backward_maxpool_layer_gpu(maxpool_layer layer, network_state state)
 {
     size_t n = layer.h*layer.w*layer.c*layer.batch;
 
-    backward_maxpool_layer_kernel<<<cuda_gridsize(n), BLOCK>>>(n, layer.h, layer.w, layer.c, layer.stride, layer.size, layer.delta_gpu, delta, layer.indexes_gpu);
+    backward_maxpool_layer_kernel<<<cuda_gridsize(n), BLOCK>>>(n, layer.h, layer.w, layer.c, layer.stride, layer.size, layer.delta_gpu, state.delta, layer.indexes_gpu);
     check_error(cudaPeekAtLastError());
 }
 

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