mirror of
https://github.com/Steffo99/unimore-hpc-assignments.git
synced 2024-11-24 17:14:23 +00:00
96 lines
2.3 KiB
C
96 lines
2.3 KiB
C
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <string.h>
|
|
#include <math.h>
|
|
|
|
/* Include polybench common header. */
|
|
#include <polybench.h>
|
|
|
|
/* Include benchmark-specific header. */
|
|
/* Default data type is double, default size is 4000. */
|
|
#include "trisolv.h"
|
|
|
|
/* Array initialization. */
|
|
static void init_array(int n,
|
|
DATA_TYPE POLYBENCH_2D(A, N, N, n, n),
|
|
DATA_TYPE POLYBENCH_1D(x, N, n),
|
|
DATA_TYPE POLYBENCH_1D(c, N, n))
|
|
{
|
|
int i, j;
|
|
|
|
for (i = 0; i < n; i++)
|
|
{
|
|
c[i] = x[i] = ((DATA_TYPE)i) / n;
|
|
for (j = 0; j < n; j++)
|
|
A[i][j] = ((DATA_TYPE)i * j) / n;
|
|
}
|
|
}
|
|
|
|
/* DCE code. Must scan the entire live-out data.
|
|
Can be used also to check the correctness of the output. */
|
|
static void print_array(int n,
|
|
DATA_TYPE POLYBENCH_1D(x, N, n))
|
|
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < n; i++)
|
|
{
|
|
fprintf(stderr, DATA_PRINTF_MODIFIER, x[i]);
|
|
if (i % 20 == 0)
|
|
fprintf(stderr, "\n");
|
|
}
|
|
}
|
|
|
|
/* Main computational kernel. The whole function will be timed,
|
|
including the call and return. */
|
|
static void kernel_trisolv(int n,
|
|
DATA_TYPE POLYBENCH_2D(A, N, N, n, n),
|
|
DATA_TYPE POLYBENCH_1D(x, N, n),
|
|
DATA_TYPE POLYBENCH_1D(c, N, n))
|
|
{
|
|
int i, j;
|
|
|
|
for (i = 0; i < _PB_N; i++)
|
|
{
|
|
x[i] = c[i];
|
|
for (j = 0; j <= i - 1; j++)
|
|
x[i] = x[i] - A[i][j] * x[j];
|
|
x[i] = x[i] / A[i][i];
|
|
}
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
/* Retrieve problem size. */
|
|
int n = N;
|
|
|
|
/* Variable declaration/allocation. */
|
|
POLYBENCH_2D_ARRAY_DECL(A, DATA_TYPE, N, N, n, n);
|
|
POLYBENCH_1D_ARRAY_DECL(x, DATA_TYPE, N, n);
|
|
POLYBENCH_1D_ARRAY_DECL(c, DATA_TYPE, N, n);
|
|
|
|
/* Initialize array(s). */
|
|
init_array(n, POLYBENCH_ARRAY(A), POLYBENCH_ARRAY(x), POLYBENCH_ARRAY(c));
|
|
|
|
/* Start timer. */
|
|
polybench_start_instruments;
|
|
|
|
/* Run kernel. */
|
|
kernel_trisolv(n, POLYBENCH_ARRAY(A), POLYBENCH_ARRAY(x), POLYBENCH_ARRAY(c));
|
|
|
|
/* Stop and print timer. */
|
|
polybench_stop_instruments;
|
|
polybench_print_instruments;
|
|
|
|
/* Prevent dead-code elimination. All live-out data must be printed
|
|
by the function call in argument. */
|
|
polybench_prevent_dce(print_array(n, POLYBENCH_ARRAY(x)));
|
|
|
|
/* Be clean. */
|
|
POLYBENCH_FREE_ARRAY(A);
|
|
POLYBENCH_FREE_ARRAY(x);
|
|
POLYBENCH_FREE_ARRAY(c);
|
|
|
|
return 0;
|
|
}
|