From 1578ec70d751231218c869d345404ea68be9e5e8 Mon Sep 17 00:00:00 2001
From: Joseph Redmon <pjreddie@gmail.com>
Date: Mon, 18 Jan 2016 23:40:14 +0000
Subject: [PATCH] idk
---
src/blas_kernels.cu | 37 +++++++++++++++++++++++++++++++++++++
1 files changed, 37 insertions(+), 0 deletions(-)
diff --git a/src/blas_kernels.cu b/src/blas_kernels.cu
index 17955e4..49406db 100644
--- a/src/blas_kernels.cu
+++ b/src/blas_kernels.cu
@@ -1,6 +1,7 @@
#include "cuda_runtime.h"
#include "curand.h"
#include "cublas_v2.h"
+#include <assert.h>
extern "C" {
#include "blas.h"
@@ -228,6 +229,7 @@
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 +374,38 @@
fill_kernel<<<cuda_gridsize(N), BLOCK>>>(N, ALPHA, X, INCX);
check_error(cudaPeekAtLastError());
}
+
+__global__ void shortcut_kernel(int size, int minw, int minh, int minc, int stride, int sample, int batch, int w1, int h1, int c1, float *add, int w2, int h2, int c2, float *out)
+{
+ int id = (blockIdx.x + blockIdx.y*gridDim.x) * blockDim.x + threadIdx.x;
+ if (id >= size) return;
+ int i = id % minw;
+ id /= minw;
+ int j = id % minh;
+ id /= minh;
+ int k = id % minc;
+ id /= minc;
+ int b = id % batch;
+
+ int out_index = i*sample + w2*(j*sample + h2*(k + c2*b));
+ int add_index = i*stride + w1*(j*stride + h1*(k + c1*b));
+ out[out_index] += add[add_index];
+}
+
+extern "C" void shortcut_gpu(int batch, int w1, int h1, int c1, float *add, int w2, int h2, int c2, float *out)
+{
+ int minw = (w1 < w2) ? w1 : w2;
+ int minh = (h1 < h2) ? h1 : h2;
+ int minc = (c1 < c2) ? c1 : c2;
+
+ int stride = w1/w2;
+ int sample = w2/w1;
+ assert(stride == h1/h2);
+ assert(sample == h2/h1);
+ if(stride < 1) stride = 1;
+ if(sample < 1) sample = 1;
+
+ int size = batch * minw * minh * minc;
+ shortcut_kernel<<<cuda_gridsize(size), BLOCK>>>(size, minw, minh, minc, stride, sample, batch, w1, h1, c1, add, w2, h2, c2, out);
+ check_error(cudaPeekAtLastError());
+}
--
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