From db0397cfaaf488364e3d2e1669dfefae2ee6ea73 Mon Sep 17 00:00:00 2001
From: Joseph Redmon <pjreddie@gmail.com>
Date: Mon, 14 Dec 2015 19:57:10 +0000
Subject: [PATCH] shortcut layers, msr networks
---
src/blas_kernels.cu | 25 +++++++++++++++++++++++++
1 files changed, 25 insertions(+), 0 deletions(-)
diff --git a/src/blas_kernels.cu b/src/blas_kernels.cu
index 17955e4..8f05eb9 100644
--- a/src/blas_kernels.cu
+++ b/src/blas_kernels.cu
@@ -228,6 +228,7 @@
if(i < N) Y[i*INCY] *= X[i*INCX];
}
+
extern "C" void normalize_gpu(float *x, float *mean, float *variance, int batch, int filters, int spatial)
{
size_t N = batch*filters*spatial;
@@ -372,3 +373,27 @@
fill_kernel<<<cuda_gridsize(N), BLOCK>>>(N, ALPHA, X, INCX);
check_error(cudaPeekAtLastError());
}
+
+__global__ void shortcut_kernel(int size, float *out, int w, int h, int c, int batch, int sample, float *add, int stride, int c2, int min_c)
+{
+ int id = (blockIdx.x + blockIdx.y*gridDim.x) * blockDim.x + threadIdx.x;
+ if (id >= size) return;
+ int i = id % (w/sample);
+ id /= (w/sample);
+ int j = id % (h/sample);
+ id /= (h/sample);
+ int k = id % min_c;
+ id /= min_c;
+ int b = id;
+ int out_index = i*sample + w*(j*sample + h*(k + c*b));
+ int add_index = b*w*stride/sample*h*stride/sample*c2 + i*stride + w*stride/sample*(j*stride + h*stride/sample*k);
+ out[out_index] += add[add_index];
+}
+
+extern "C" void shortcut_gpu(float *out, int w, int h, int c, int batch, int sample, float *add, int stride, int c2)
+{
+ int min_c = (c < c2) ? c : c2;
+ int size = batch * w/sample * h/sample * min_c;
+ shortcut_kernel<<<cuda_gridsize(size), BLOCK>>>(size, out, w, h, c, batch, sample, add, stride, c2, min_c);
+ check_error(cudaPeekAtLastError());
+}
--
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