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#include <stdio.h>
#include <time.h>
#include <sys/types.h>
#include <sys/time.h>
#include "../gpu.h"
#include "../gpu-complex.h"
#ifndef GPU_USE_COMPLEX
# define BLOCK (16)
# define BLOCK_X (32)
# define BLOCK_Y (8)
# define ACACHE_X (2 * BLOCK_X + 1)
# define ACACHE_Y (2 * BLOCK_Y + 1)
#endif
__global__ void Zgpu(restrict_kernel)(const Tgpu* a, const int3 n,
Tgpu* b, const int3 b_n,
int xdiv, int blocks)
{
int i2, i1;
int i2_x2, i1_x2;
int xlen;
Tgpu *acache12p;
Tgpu *acache12p_2x;
Tgpu b_old;
__shared__ Tgpu Zgpu(acache12)[ACACHE_X * ACACHE_Y];
{
int xx = gridDim.x / xdiv;
int xind = blockIdx.x / xx;
int base = (blockIdx.x - xind * xx) * BLOCK_X;
i2 = base + threadIdx.x;
i2_x2 = 2 * base + threadIdx.x;
int yy = gridDim.y / blocks;
int blocksi = blockIdx.y / yy;
base = (blockIdx.y - blocksi * yy) * BLOCK_Y;
i1 = base + threadIdx.y;
i1_x2 = 2 * base + threadIdx.y;
xlen = (b_n.x + xdiv - 1) / xdiv;
int xstart = xind * xlen;
if ((b_n.x - xstart) < xlen)
xlen = b_n.x - xstart;
a += n.x * n.y * n.z * blocksi + 2 * xstart * n.y * n.z
+ i1_x2 * n.z + i2_x2;
b += b_n.x * b_n.y * b_n.z * blocksi + xstart * b_n.y * b_n.z
+ i1 * b_n.z + i2;
}
acache12p = Zgpu(acache12) + ACACHE_X * threadIdx.y + threadIdx.x;
acache12p_2x = Zgpu(acache12) + ACACHE_X * (2 * threadIdx.y)
+ 2 * threadIdx.x;
acache12p[0] = a[0];
acache12p[BLOCK_X] = a[BLOCK_X];
if (threadIdx.x < 1) {
acache12p[2 * BLOCK_X] = a[2 * BLOCK_X];
acache12p[BLOCK_Y * ACACHE_X + 2 * BLOCK_X]
= a[BLOCK_Y * n.z + 2 * BLOCK_X];
}
acache12p[BLOCK_Y * ACACHE_X + 0] = a[BLOCK_Y * n.z];
acache12p[BLOCK_Y * ACACHE_X + BLOCK_X] = a[BLOCK_Y * n.z + BLOCK_X];
if (threadIdx.y < 1) {
acache12p[2 * BLOCK_Y * ACACHE_X] = a[2 * BLOCK_Y * n.z];
acache12p[2 * BLOCK_Y * ACACHE_X + BLOCK_X]
= a[2 * BLOCK_Y * n.z + BLOCK_X];
if (threadIdx.x < 1)
acache12p[2 * BLOCK_Y * ACACHE_X + 2 * BLOCK_X]
= a[2 * BLOCK_Y * n.z + 2 * BLOCK_X];
}
__syncthreads();
b_old = ADD3(MULTD(acache12p_2x[ACACHE_X * 1 + 1], 0.0625),
MULTD(ADD4(acache12p_2x[ACACHE_X * 1 + 0],
acache12p_2x[ACACHE_X * 1 + 2],
acache12p_2x[ACACHE_X * 0 + 1],
acache12p_2x[ACACHE_X * 2 + 1]),
0.03125),
MULTD(ADD4(acache12p_2x[ACACHE_X * 0 + 0],
acache12p_2x[ACACHE_X * 0 + 2],
acache12p_2x[ACACHE_X * 2 + 0],
acache12p_2x[ACACHE_X * 2 + 2]),
0.015625));
__syncthreads();
for (int i0=0; i0 < xlen; i0++) {
a += n.y * n.z;
acache12p[0] = a[0];
acache12p[BLOCK_X] = a[BLOCK_X];
if (threadIdx.x < 1) {
acache12p[2 * BLOCK_X] = a[2 * BLOCK_X];
acache12p[BLOCK_Y * ACACHE_X + 2 * BLOCK_X]
= a[BLOCK_Y * n.z + 2 * BLOCK_X];
}
acache12p[BLOCK_Y * ACACHE_X + 0] = a[BLOCK_Y * n.z];
acache12p[BLOCK_Y * ACACHE_X + BLOCK_X] = a[BLOCK_Y * n.z + BLOCK_X];
if (threadIdx.y < 1) {
acache12p[2 * BLOCK_Y * ACACHE_X] = a[2 * BLOCK_Y * n.z];
acache12p[2 * BLOCK_Y * ACACHE_X + BLOCK_X]
= a[2 * BLOCK_Y * n.z + BLOCK_X];
if (threadIdx.x < 1)
acache12p[2 * BLOCK_Y * ACACHE_X + 2 * BLOCK_X]
= a[2 * BLOCK_Y * n.z + 2 * BLOCK_X];
}
__syncthreads();
IADD(b_old, ADD3(MULTD(acache12p_2x[ACACHE_X * 1 + 1], 0.125),
MULTD(ADD4(acache12p_2x[ACACHE_X * 1 + 0],
acache12p_2x[ACACHE_X * 1 + 2],
acache12p_2x[ACACHE_X * 0 + 1],
acache12p_2x[ACACHE_X * 2 + 1]),
0.0625),
MULTD(ADD4(acache12p_2x[ACACHE_X * 0 + 0],
acache12p_2x[ACACHE_X * 0 + 2],
acache12p_2x[ACACHE_X * 2 + 0],
acache12p_2x[ACACHE_X * 2 + 2]),
0.03125)));
__syncthreads();
a += n.y * n.z;
if (i0 == b_n.x - 1) {
if (i1_x2 < n.y) {
if (i2_x2 < n.z) {
acache12p[0] = a[0];
if (i2_x2 + BLOCK_X < n.z) {
acache12p[BLOCK_X] = a[BLOCK_X];
if (threadIdx.x < 1) {
if (i2_x2 + 2 * BLOCK_X < n.z)
acache12p[2 * BLOCK_X] = a[2 * BLOCK_X];
}
}
}
}
if (i1_x2 + BLOCK_Y < n.y) {
if (i2_x2 < n.z) {
acache12p[BLOCK_Y * ACACHE_X + 0] = a[BLOCK_Y * n.z];
if (i2_x2 + BLOCK_X < n.z) {
acache12p[BLOCK_Y * ACACHE_X + BLOCK_X]
= a[BLOCK_Y * n.z + BLOCK_X];
if (threadIdx.x < 1) {
if (i2_x2 + 2 * BLOCK_X < n.z)
acache12p[BLOCK_Y * ACACHE_X + 2 * BLOCK_X]
=a[BLOCK_Y * n.z + 2 * BLOCK_X];
}
}
}
}
if (threadIdx.y < 1) {
if (i1_x2 + 2 * BLOCK_Y < n.y) {
if (i2_x2 < n.z) {
acache12p[2 * BLOCK_Y * ACACHE_X]
= a[2 * BLOCK_Y * n.z];
if (i2_x2 + BLOCK_X < n.z) {
acache12p[2 * BLOCK_Y * ACACHE_X + BLOCK_X]
= a[2 * BLOCK_Y * n.z + BLOCK_X];
if (threadIdx.x < 1)
if (i2_x2 + 2 * BLOCK_X < n.z)
acache12p[2 * BLOCK_Y * ACACHE_X
+ 2 * BLOCK_X]
= a[2 * BLOCK_Y * n.z + 2 * BLOCK_X];
}
}
}
}
} else {
acache12p[0] = a[0];
acache12p[BLOCK_X] = a[BLOCK_X];
if (threadIdx.x < 1) {
acache12p[2 * BLOCK_X] = a[2 * BLOCK_X];
acache12p[BLOCK_Y * ACACHE_X + 2 * BLOCK_X]
= a[BLOCK_Y * n.z + 2 * BLOCK_X];
}
acache12p[BLOCK_Y * ACACHE_X + 0] = a[BLOCK_Y * n.z];
acache12p[BLOCK_Y * ACACHE_X + BLOCK_X]
= a[BLOCK_Y * n.z + BLOCK_X];
if (threadIdx.y < 1) {
acache12p[2 * BLOCK_Y * ACACHE_X] = a[2 * BLOCK_Y * n.z];
acache12p[2 * BLOCK_Y * ACACHE_X + BLOCK_X]
= a[2 * BLOCK_Y * n.z + BLOCK_X];
if (threadIdx.x < 1)
acache12p[2 * BLOCK_Y * ACACHE_X + 2 * BLOCK_X]
=a[2 * BLOCK_Y * n.z + 2 * BLOCK_X];
}
}
__syncthreads();
Tgpu b_new=ADD3(MULTD(acache12p_2x[ACACHE_X * 1 + 1], 0.0625),
MULTD(ADD4(acache12p_2x[ACACHE_X * 1 + 0],
acache12p_2x[ACACHE_X * 1 + 2],
acache12p_2x[ACACHE_X * 0 + 1],
acache12p_2x[ACACHE_X * 2 + 1]),
0.03125),
MULTD(ADD4(acache12p_2x[ACACHE_X * 0 + 0],
acache12p_2x[ACACHE_X * 0 + 2],
acache12p_2x[ACACHE_X * 2 + 0],
acache12p_2x[ACACHE_X * 2 + 2]),
0.015625));
if (i1 < b_n.y && i2 < b_n.z)
b[0] = ADD(b_old, b_new);
b_old = b_new;
__syncthreads();
b += b_n.y * b_n.z;
}
}
extern "C"
void Zgpu(bmgs_restrict_gpu)(int k, const Tgpu* a, const int size[3],
Tgpu* b, const int sizeb[3], int blocks)
{
if (k != 2)
assert(0);
dim3 dimBlock(BLOCK_X, BLOCK_Y);
int xdiv = MIN(MAX(sizeb[0] / 2, 1),
MAX((4 + blocks - 1) / blocks, 1));
int gridy = blocks * ((sizeb[1] + dimBlock.y - 1) / dimBlock.y);
int gridx = xdiv * ((sizeb[2] + dimBlock.x - 1) / dimBlock.x);
dim3 dimGrid(gridx, gridy);
int3 n = {size[0], size[1], size[2]};
int3 b_n = {sizeb[0], sizeb[1], sizeb[2]};
gpuLaunchKernel(
Zgpu(restrict_kernel), dimGrid, dimBlock, 0, 0,
a, n ,b, b_n, xdiv, blocks);
gpuCheckLastError();
}
#define K 2
#define RST1D Zgpu(restrict1D2)
#define RST1D_kernel Zgpu(restrict1D2_kernel)
#include "restrict-stencil.cpp"
#undef RST1D
#undef RST1D_kernel
#undef K
#define K 4
#define RST1D Zgpu(restrict1D4)
#define RST1D_kernel Zgpu(restrict1D4_kernel)
#include "restrict-stencil.cpp"
#undef RST1D
#undef RST1D_kernel
#undef K
#define K 6
#define RST1D Zgpu(restrict1D6)
#define RST1D_kernel Zgpu(restrict1D6_kernel)
#include "restrict-stencil.cpp"
#undef RST1D
#undef RST1D_kernel
#undef K
#define K 8
#define RST1D Zgpu(restrict1D8)
#define RST1D_kernel Zgpu(restrict1D8_kernel)
#include "restrict-stencil.cpp"
#undef RST1D
#undef RST1D_kernel
#undef K
extern "C"
void Zgpu(bmgs_restrict_stencil_gpu)(int k, Tgpu* a, const int na[3],
Tgpu* b, const int nb[3],
Tgpu* w, int blocks)
{
void (*func)(const Tgpu*, int, int, Tgpu*, int, int, int);
int ang = na[0] * na[1] * na[2];
int bng = nb[0] * nb[1] * nb[2];
if (k == 2)
func = Zgpu(restrict1D2);
else if (k == 4)
func = Zgpu(restrict1D4);
else if (k == 6)
func = Zgpu(restrict1D6);
else
func = Zgpu(restrict1D8);
int e = k * 2 - 3;
func(a, (na[2] - e) / 2, na[0] * na[1], w, ang, ang, blocks);
func(w, (na[1] - e) / 2, na[0] * (na[2] - e) / 2, a, ang, ang, blocks);
func(a, (na[0] - e) / 2, (na[1] - e) * (na[2] - e) / 4, b, ang, bng,
blocks);
}
#ifndef GPU_USE_COMPLEX
#define GPU_USE_COMPLEX
#include "restrict.cpp"
#endif
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