/
deblockboxes.c
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/
deblockboxes.c
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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <math.h>
#include <assert.h>
#include <time.h>
#include "C4SNet.h"
#include "memfun.h"
typedef double *tile;
static struct timespec begin;
static char* outfile;
static double delta_time(struct timespec t0, struct timespec t1)
{
return t1.tv_sec - t0.tv_sec + t1.tv_nsec * 1e-9 - t0.tv_nsec * 1e-9;
}
// compute_s1
void * compute_s1 (void *hnd, c4snet_data_t * atiles, c4snet_data_t * ltiles,
int bs, int p, int k)
{
int k_b, j_b, j, i_b, j_bb;
tile * a_tiles = *((tile **) C4SNetGetData (atiles));
tile * l_tiles = *((tile **) C4SNetGetData (ltiles));
for (k_b = 0; k_b < bs; k_b++) {
l_tiles[k * p + k][k_b * bs + k_b] =
sqrt (a_tiles[k * p + k][k_b * bs + k_b]);
for (j_b = k_b + 1; j_b < bs; j_b++)
l_tiles[k * p + k][k_b * bs + j_b] =
a_tiles[k * p + k][k_b * bs + j_b]
/ l_tiles[k * p + k][k_b * bs + k_b];
for (j_bb = k_b + 1; j_bb < bs; j_bb++)
for (i_b = j_bb; i_b < bs; i_b++)
a_tiles[k * p + k][i_b * bs + j_bb] =
a_tiles[k * p + k][i_b * bs + j_bb]
- l_tiles[k * p + k][k_b * bs + i_b]
* l_tiles[k * p + k][k_b * bs + j_bb];
}
if (k + 1 < p)
for (j = k + 1; j < p; j++)
C4SNetOut (hnd, 1, atiles, ltiles, bs, p, k, j);
else {
int i, j;
C4SNetOut (hnd, 2, ltiles, bs, p);
/* deallocate a_tiles array and remove atiles field. */
for (i = 0; i < p; i++)
for (j = 0; j <= i; j++)
free (a_tiles[j * p + i]);
free (a_tiles);
C4SNetFree (atiles);
}
return hnd;
}
// compute_s2
void * solve_s2 (void *hnd, c4snet_data_t * atiles, c4snet_data_t * ltiles,
int bs, int p, int k, int j)
{
int k_b, j_b, i_b;
tile * a_tiles = *((tile **) C4SNetGetData (atiles));
tile * l_tiles = *((tile **) C4SNetGetData (ltiles));
memset (l_tiles[k * p + j], 0, sizeof (double) * bs * bs);
assert (j != k);
for (k_b = 0; k_b < bs; k_b++) {
for (i_b = 0; i_b < bs; i_b++)
l_tiles[k * p + j][k_b * bs + i_b] =
a_tiles[k * p + j][k_b * bs + i_b]
/ l_tiles[k * p + k][k_b * bs + k_b];
for (j_b = k_b + 1; j_b < bs; j_b++)
for (i_b = 0; i_b < bs; i_b++)
a_tiles[k * p + j][j_b * bs + i_b] =
a_tiles[k * p + j][j_b * bs + i_b]
- l_tiles[k * p + k][k_b * bs + j_b]
* l_tiles[k * p + j][k_b * bs + i_b];
}
C4SNetOut (hnd, 1, atiles, ltiles, bs, p, k);
return hnd;
}
// compute_s3
void * distribute (void *hnd, c4snet_data_t * fatiles, c4snet_data_t * fltiles,
int bs, int p, int k)
{
int i, j;
for (j = k + 1; j < p; j++)
for (i = k + 1; i <= j; i++)
C4SNetOut (hnd, 1, fatiles, fltiles, bs, p, k, i * p + j);
return hnd;
}
void * update (void *hnd, c4snet_data_t * fatiles, c4snet_data_t * fltiles,
int bs, int p, int k, int index)
{
tile * a_tiles = *((tile **) C4SNetGetData (fatiles));
tile * l_tiles = *((tile **) C4SNetGetData (fltiles));
int j_b, k_b, i_b;
int i = index % p, j = index / p;
tile l1_block = NULL, l2_block = NULL;
// Diagonal tile
if (i == j)
l2_block = l_tiles[k * p + j];
else {
l1_block = l_tiles[k * p + i];
l2_block = l_tiles[k * p + j];
}
for (j_b = 0; j_b < bs; j_b++)
for (k_b = 0; k_b < bs; k_b++) {
double temp = -1 * l2_block[k_b * bs + j_b];
if (i != j)
for (i_b = 0; i_b < bs; i_b++)
a_tiles[j * p + i][j_b * bs + i_b] =
a_tiles[j * p + i][j_b * bs + i_b]
+ temp * l1_block[k_b * bs + i_b];
else
for (i_b = j_b; i_b < bs; i_b++)
a_tiles[j * p + i][j_b * bs + i_b] =
a_tiles[j * p + i][j_b * bs + i_b]
+ temp * l2_block[k_b * bs + i_b];
}
C4SNetOut (hnd, 1, fatiles, fltiles, bs, p, k);
return hnd;
}
// decompose
/* Convert an array of chars to a nul-terminated string. */
static char* chars_to_string(c4snet_data_t *c4data)
{
size_t size = C4SNetArraySize(c4data);
char* str = SNetMemAlloc(size + 1);
memcpy(str, C4SNetGetData(c4data), size);
str[size] = '\0';
return str;
}
/* Print an error message and terminate. */
static void pexit(const char *msg)
{
perror(msg);
exit(1);
}
/* Open a file or terminate. */
static FILE* xfopen(const char *fname, const char *mode)
{
FILE *fp;
if (!strcmp(fname, "-")) {
fp = (*mode == 'r') ? stdin : stdout;
}
else if ((fp = fopen(fname, mode)) == NULL) {
pexit(fname);
}
return fp;
}
static void xfclose(FILE *fp)
{
if (fp != stdin && fp != stdout) fclose(fp);
}
/* Read the lower triangle of a matrix from file and copy to upper triangle. */
static void read_matrix(int n, double *A, const char *infile)
{
FILE *fp = xfopen(infile, "r");
int r, c;
for (r = 0; r < n; ++r) {
for (c = 0; c <= r; ++c) {
if (fscanf(fp, " %lf", &A[r * n + c]) != 1) {
fprintf(stderr, "Failed to read array from %s\n", infile);
exit(1);
}
A[c * n + r] = A[r * n + c];
}
}
xfclose(fp);
}
void * decompose (void *hnd, c4snet_data_t *InFile, c4snet_data_t *OutFile,
int a_size, int bs)
{
int p, i, j;
double *array;
tile *atiles, *ltiles;
char *infile;
if (bs <= 0) {
fprintf (stderr, "A block size must be greater than 0\n");
exit (1);
}
if (a_size <= 0) {
fprintf (stderr, "The dimension of matrix must be greater than 0\n");
exit (1);
}
if (a_size % bs) {
fprintf(stderr,
"matrix size %d is not a multiple of the block size %d\n",
a_size, bs);
exit(1);
}
p = a_size / bs;
/* Get the input filename as a string. */
infile = chars_to_string(InFile);
outfile = chars_to_string(OutFile);
C4SNetFree(InFile);
C4SNetFree(OutFile);
array = SNetMemAlloc(a_size * a_size * sizeof(double));
read_matrix(a_size, array, infile);
free(infile);
if (clock_gettime(CLOCK_REALTIME, &begin)) {
pexit("clock_gettime");
}
atiles = (tile *) malloc (sizeof (tile) * p * p);
ltiles = (tile *) malloc (sizeof (tile) * p * p);
memset (atiles, 0, sizeof (tile) * p * p);
memset (ltiles, 0, sizeof (tile) * p * p);
for (i = 0; i < p; i++)
for (j = 0; j <= i; j++) {
atiles[j * p + i] = (double *) malloc (sizeof (double) * bs * bs);
ltiles[j * p + i] = (double *) malloc (sizeof (double) * bs * bs);
int ai, aj, ti, tj;
for (ai = i * bs, ti = 0; ti < bs; ai++, ti++)
for (aj = j * bs, tj = 0; tj < bs; aj++, tj++)
atiles[j * p + i][tj * bs + ti] = array[aj * a_size + ai];
}
C4SNetOut (hnd, 1, C4SNetCreate (CTYPE_char, sizeof (void *), &atiles),
C4SNetCreate (CTYPE_char, sizeof (void *), <iles), bs, p, 0);
free(array);
return hnd;
}
// merger
void * gen_counter (void *hnd)
{
C4SNetOut (hnd, 1, 0);
return hnd;
}
void * merge (void *hnd, c4snet_data_t * atiles, c4snet_data_t * ltiles,
int counter, int bs, int p, int k)
{
if (++counter < p - k - 1)
C4SNetOut (hnd, 1, counter);
else
C4SNetOut (hnd, 2, atiles, ltiles, bs, p, k);
return hnd;
}
static void write_matrix(tile *tiles, int p, int bs)
{
FILE *fp = xfopen(outfile, "w");
int size = p * bs;
int i, j;
double *array = (double *) malloc (sizeof (double) * size * size);
memset (array, 0.0, sizeof (double) * sizeof (size * size));
for (i = 0; i < p; i++) {
for (j = 0; j <= i; j++) {
int k;
for (k = 0; k < bs * bs; k++) {
int px = j * bs + (k / bs);
int py = i * bs + (k % bs);
array[py * size + px] = tiles[j * p + i][k];
}
free (tiles[j * p + i]);
}
}
for (i = 0; i < size; i++) {
for(j = 0; j <= i; j++)
fprintf(fp, "%lf ", array[i * size + j]);
fprintf(fp, "\n");
}
xfclose(fp);
free (outfile);
free (array);
free (tiles);
}
void *
finalize (void *hnd, c4snet_data_t * fltiles, int bs, int p)
{
struct timespec end;
tile * tiles = *((tile **) C4SNetGetData (fltiles));
if (clock_gettime(CLOCK_REALTIME, &end)) {
pexit("clock_gettime");
}
printf("Time for size %d x %d : %lf sec\n", bs * p, bs * p, delta_time(begin, end));
write_matrix(tiles, p, bs);
C4SNetOut (hnd, 1, C4SNetCreate (CTYPE_char, 5, "Done."));
C4SNetFree (fltiles);
return hnd;
}
void * sync (void *hnd, c4snet_data_t * fatiles, c4snet_data_t * fltiles,
int counter, int bs, int p, int k)
{
if (++counter < (p - k) * (p - k - 1) / 2)
C4SNetOut (hnd, 1, counter);
else
C4SNetOut (hnd, 2, fatiles, fltiles, bs, p, k);
return hnd;
}