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/* StarPU --- Runtime system for heterogeneous multicore architectures.
*
* Copyright (C) 2010 Université de Bordeaux 1
*
* StarPU is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at
* your option) any later version.
*
* StarPU is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* See the GNU Lesser General Public License in COPYING.LGPL for more details.
*/
#define _externC extern "C"
#include "stencil.h"
#include <starpu_cuda.h>
/* Perform replication of data on X and Y edges, to fold the domain on
itself through mere replication of the source state. */
extern "C" __global__ void
cuda_shadow( int bz, TYPE *ptr, int nx, int ny, int nz, int ldy, int ldz, int i)
{
unsigned idx = threadIdx.x + blockIdx.x * blockDim.x;
unsigned idy = threadIdx.y + blockIdx.y * blockDim.y;
//unsigned idz = threadIdx.z + blockIdx.z * blockDim.z;
unsigned idz = 0;
unsigned stepx = blockDim.x * gridDim.x;
unsigned stepy = blockDim.y * gridDim.y;
//unsigned stepz = blockDim.z * gridDim.z;
unsigned stepz = 1;
unsigned x, y, z;
#include "shadow.h"
}
extern "C" void
cuda_shadow_host(int bz, TYPE *ptr, int nx, int ny, int nz, int ldy, int ldz, int i)
{
unsigned max_parallelism = 512;
unsigned threads_per_dim_x = max_parallelism;
while (threads_per_dim_x / 2 >= nx)
threads_per_dim_x /= 2;
unsigned threads_per_dim_y = max_parallelism / threads_per_dim_x;
while (threads_per_dim_y / 2 >= ny)
threads_per_dim_y /= 2;
#if 0
unsigned threads_per_dim_z = 4;
dim3 dimBlock(threads_per_dim_x, threads_per_dim_y, threads_per_dim_z);
dim3 dimGrid(nx / threads_per_dim_x, ny / threads_per_dim_y, nz / threads_per_dim_z);
#else
dim3 dimBlock(threads_per_dim_x, threads_per_dim_y);
dim3 dimGrid((nx + threads_per_dim_x-1) / threads_per_dim_x, (ny + threads_per_dim_y-1) / threads_per_dim_y);
#endif
cuda_shadow <<<dimGrid, dimBlock, 0, starpu_cuda_get_local_stream()>>> (bz, ptr, nx, ny, nz, ldy, ldz, i);
}
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