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174 lines (125 loc) · 5.76 KB
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#ifndef _KERNEL_2D_H_
#define _KERNEL_2D_H_
#include <stdio.h>
#include "shmem_operations_2D.cu"
#include "prng.cu"
#include "reduce.cu"
#include "config.h"
__device__ float E(volatile data sdata[][NCOLUMNS], data node, float n,
float gamma, float lambda, unsigned int x, unsigned int y) {
float c = 0.0f;
float d = 0.0f;
float corona = 0.0f;
float newcorona = 0.0f;
float sum = 0.0f;
for (int i = 0; i < N; i++) {
c += (sdata[x][y].vector[i] * sdata[x][y].vector[i]);
d += (node.vector[i] * node.vector[i]);
corona += (sdata[x + 1][y].vector[i] + sdata[x - 1][y].vector[i] +
sdata[x][y + 1].vector[i] + sdata[x][y - 1].vector[i]);
newcorona +=
-lambda * ((sdata[x - 2][y].vector[i] + sdata[x + 2][y].vector[i] +
sdata[x][y + 2].vector[i] + sdata[x][y - 2].vector[i]) -
8.0f * corona + 2.0f * (sdata[x - 1][y + 1].vector[i] +
sdata[x + 1][y + 1].vector[i] +
sdata[x - 1][y - 1].vector[i] +
sdata[x + 1][y - 1].vector[i]));
sum = -node.vector[i] + sdata[x][y].vector[i];
}
float e = (d - c) * (2.0f + 0.5f * n + 0.0416666f * gamma * (d + c) +
10.0f * lambda) +
(sum) * (corona + newcorona);
return e;
}
__device__ void shmem_metropolis_2D(data sdata[][SIZE_Y], unsigned int location,
unsigned int *seed, unsigned int size,
float n, float gamma, float lambda,
unsigned int x, unsigned int y) {
register data node;
for (int i = 0; i < N; i++) {
node.vector[i] = sdata[x][y].vector[i] +
0.4f * HybridTaus(seed[0], seed[1], seed[2], seed[3]) -
0.2f;
}
register float dE = E(sdata, node, n, gamma, lambda, x, y);
if (HybridTaus(seed[0], seed[1], seed[2], seed[3]) < __expf(-dE)) {
sdata[x][y] = node;
}
}
__global__ void Phi_2D(data *g_idata, unsigned int *seed, int iteration,
unsigned int size, float n, float gamma, float lambda,
unsigned int offsetx, unsigned int offsety) {
unsigned int location;
int row, col;
row = blockIdx.x * 4 * blockDim.x + 2 * threadIdx.x +
offsetx * 16; //+ 8*((blockIdx.x+offsetx)&1);// +
//((blockIdx.x+offsetx)&1)*size;
col = 2 * blockIdx.y * 16 + 4 * threadIdx.y +
2 * ((offsety) & 1) * BLOCK; // 2*((blockIdx.x+offsety)&1)*BLOCK;
__shared__ data sdata[20][20];
location = row * size + col;
int second_location = (row + 1) * size + col;
unsigned int register_seed[4];
// int index = 4*((blockIdx.x * blockDim.x + threadIdx.x)*(size/32) +
// __mul24(blockIdx.y,blockDim.y) + threadIdx.y ); //
// ((__mul24(blockIdx.x,blockDim.x) + threadIdx.x)*(size/32) +
// __mul24(__mul24(blockIdx.y,blockDim.y)) + threadIdx.y );
unsigned int seed_location =
((blockIdx.x) * blockDim.x + threadIdx.x) * blockDim.y +
((blockIdx.y) * blockDim.y + threadIdx.y);
register_seed[0] = seed[4 * seed_location];
register_seed[1] = seed[4 * seed_location + 1];
register_seed[2] = seed[4 * seed_location + 2];
register_seed[3] = seed[4 * seed_location + 3];
//---------------------------- SHARED MEMORY
//-------------------------------------//
globmem_to_shmem_2D(sdata, g_idata, row, col, location, second_location,
size);
__syncthreads();
int x = (2 * threadIdx.x) + 2;
int z = (4 * threadIdx.y) + 2;
int z1 = (((x) & 3 ? z : z + 2));
int z2 = (((x + 2) & 3 ? z + 2 : z));
int z3 = (((x) & 3 ? z + 2 : z));
int z4 = (((x + 2) & 3 ? z : z + 2));
#pragma unroll 10
for (int i = 0; i < LOCAL_SWEEPS; i++) {
shmem_metropolis_2D(sdata, location, register_seed, size, n, gamma, lambda,
(2 * threadIdx.x) + 2, z1);
__syncthreads();
shmem_metropolis_2D(sdata, location, register_seed, size, n, gamma, lambda,
(2 * threadIdx.x) + 3, z2);
__syncthreads();
shmem_metropolis_2D(sdata, location, register_seed, size, n, gamma, lambda,
(2 * threadIdx.x) + 2, z3);
__syncthreads();
shmem_metropolis_2D(sdata, location, register_seed, size, n, gamma, lambda,
(2 * threadIdx.x) + 3, z4);
__syncthreads();
shmem_metropolis_2D(sdata, location, register_seed, size, n, gamma, lambda,
(2 * threadIdx.x) + 2, z1 + 1);
__syncthreads();
shmem_metropolis_2D(sdata, location, register_seed, size, n, gamma, lambda,
(2 * threadIdx.x) + 3, z1 + 1);
__syncthreads();
shmem_metropolis_2D(sdata, location, register_seed, size, n, gamma, lambda,
(2 * threadIdx.x) + 2, z3 + 1);
__syncthreads();
shmem_metropolis_2D(sdata, location, register_seed, size, n, gamma, lambda,
(2 * threadIdx.x) + 3, z4 + 1);
__syncthreads();
}
seed[4 * seed_location] = register_seed[0];
seed[4 * seed_location + 1] = register_seed[1];
seed[4 * seed_location + 2] = register_seed[2];
seed[4 * seed_location + 3] = register_seed[3];
g_idata[row * size + col] = sdata[2 * threadIdx.x + 2][z];
g_idata[row * size + col + 1] = sdata[2 * threadIdx.x + 2][z + 1];
g_idata[row * size + col + 2] = sdata[2 * threadIdx.x + 2][z + 2];
g_idata[row * size + col + 3] = sdata[2 * threadIdx.x + 2][z + 3];
g_idata[(row + 1) * size + col] = sdata[2 * threadIdx.x + 3][z];
g_idata[(row + 1) * size + col + 1] = sdata[2 * threadIdx.x + 3][z + 1];
g_idata[(row + 1) * size + col + 2] = sdata[2 * threadIdx.x + 3][z + 2];
g_idata[(row + 1) * size + col + 3] = sdata[2 * threadIdx.x + 3][z + 3];
}
#endif