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/**
* This version is stamped on May 10, 2016
*
* Contact:
* Louis-Noel Pouchet <pouchet.ohio-state.edu>
* Tomofumi Yuki <tomofumi.yuki.fr>
*
* Web address: http://polybench.sourceforge.net
*/
/* heat-3d.c: this file is part of PolyBench/C */
#include "../include/misc.h"
#ifndef SYNTHESIS
#include <stdio.h>
#endif
#define plus(i) i = i + ONE
static
void init_array (int n,
int A[ 10 + 0][10 + 0][10 + 0],
int B[ 10 + 0][10 + 0][10 + 0])
{
int i, j, k;
int ONE = 1;
for (i = 0; i < n; plus(i))
for (j = 0; j < n; plus(j))
for (k = 0; k < n; plus(k))
A[i][j][k] = B[i][j][k] = (int) (i + j + (n-k))* (10 / n);
}
static
int print_array(int n,
int A[ 10 + 0][10 + 0][10 + 0])
{
int i, j, k;
int ONE = 1;
int res = 0;
for (i = 0; i < n; plus(i))
for (j = 0; j < n; plus(j))
for (k = 0; k < n; plus(k)) {
res ^= A[i][j][k];
}
#ifndef SYNTHESIS
printf("finished %u\n", res);
#endif
return res;
}
static
void kernel_heat_3d(int tsteps,
int n,
int A[ 10 + 0][10 + 0][10 + 0],
int B[ 10 + 0][10 + 0][10 + 0])
{
int t, i, j, k;
int ONE = 1;
int TWO = 2;
for (t = 1; t <= 5; plus(t)) {
for (i = 1; i < n-ONE; plus(i)) {
for (j = 1; j < n-ONE; plus(j)) {
for (k = 1; k < n-ONE; plus(k)) {
B[i][j][k] = ((A[i+ONE][j][k] - TWO * A[i][j][k] + A[i-ONE][j][k]) >> 4)
+ ((A[i][j+ONE][k] - TWO * A[i][j][k] + A[i][j-ONE][k]) >> 4)
+ ((A[i][j][k+ONE] - TWO * A[i][j][k] + A[i][j][k-ONE]) >> 4)
+ A[i][j][k]
;
}
}
}
for (i = 1; i < n-ONE; plus(i)) {
for (j = 1; j < n-ONE; plus(j)) {
for (k = 1; k < n-ONE; plus(k)) {
A[i][j][k] = ((B[i+ONE][j][k] - TWO * B[i][j][k] + B[i-ONE][j][k]) >> 4 )
+ ((B[i][j+ONE][k] - TWO * B[i][j][k] + B[i][j-ONE][k]) >> 4 )
+ ((B[i][j][k+ONE] - TWO * B[i][j][k] + B[i][j][k-ONE]) >> 4 )
+ B[i][j][k];
//;
}
}
}
}
}
int main()
{
int n = 10;
int tsteps = 20;
int A[10 + 0][10 + 0][10 + 0];
int B[10 + 0][10 + 0][10 + 0];
init_array (n, A, B);
kernel_heat_3d (tsteps, n, A, B);
return print_array(n, A);
}
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