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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
*/
/* symm.c: this file is part of PolyBench/C */
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <math.h>
/* Include polybench common header. */
#include <polybench.h>
/* Include benchmark-specific header. */
#include "symm.h"
/* Array initialization. */
static
void init_array(int m, int n,
DATA_TYPE *alpha,
DATA_TYPE *beta,
DATA_TYPE POLYBENCH_2D(C,M,N,m,n),
DATA_TYPE POLYBENCH_2D(A,M,M,m,m),
DATA_TYPE POLYBENCH_2D(B,M,N,m,n))
{
int i, j;
*alpha = 1.5;
*beta = 1.2;
for (i = 0; i < m; i++)
for (j = 0; j < n; j++) {
C[i][j] = (DATA_TYPE) ((i+j) % 100) / m;
B[i][j] = (DATA_TYPE) ((n+i-j) % 100) / m;
}
for (i = 0; i < m; i++) {
for (j = 0; j <=i; j++)
A[i][j] = (DATA_TYPE) ((i+j) % 100) / m;
for (j = i+1; j < m; j++)
A[i][j] = -999; //regions of arrays that should not be used
}
}
/* 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 m, int n,
DATA_TYPE POLYBENCH_2D(C,M,N,m,n))
{
int i, j;
POLYBENCH_DUMP_START;
POLYBENCH_DUMP_BEGIN("C");
for (i = 0; i < m; i++)
for (j = 0; j < n; j++) {
if ((i * m + j) % 20 == 0) fprintf (POLYBENCH_DUMP_TARGET, "\n");
fprintf (POLYBENCH_DUMP_TARGET, DATA_PRINTF_MODIFIER, C[i][j]);
}
POLYBENCH_DUMP_END("C");
POLYBENCH_DUMP_FINISH;
}
/* Main computational kernel. The whole function will be timed,
including the call and return. */
static
void kernel_symm(int m, int n,
DATA_TYPE alpha,
DATA_TYPE beta,
DATA_TYPE POLYBENCH_2D(C,M,N,m,n),
DATA_TYPE POLYBENCH_2D(A,M,M,m,m),
DATA_TYPE POLYBENCH_2D(B,M,N,m,n))
{
int i, j, k;
DATA_TYPE temp2;
//BLAS PARAMS
//SIDE = 'L'
//UPLO = 'L'
// => Form C := alpha*A*B + beta*C
// A is MxM
// B is MxN
// C is MxN
//note that due to Fortran array layout, the code below more closely resembles upper triangular case in BLAS
#pragma scop
for (i = 0; i < _PB_M; i++){
#pragma omp parallel for
for (k = 0; k < i; k++)
C[k][j] += alpha*B[i][j] * A[i][k];
for (j = 0; j < _PB_N; j++ ){
temp2 = 0;
for (k = 0; k < i; k++) {
temp2 += B[k][j] * A[i][k];
}
C[i][j] = beta * C[i][j] + alpha*B[i][j] * A[i][i] + alpha * temp2;
}
}
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#pragma endscop
}
int main(int argc, char** argv)
{
/* Retrieve problem size. */
int m = M;
int n = N;
/* Variable declaration/allocation. */
DATA_TYPE alpha;
DATA_TYPE beta;
POLYBENCH_2D_ARRAY_DECL(C,DATA_TYPE,M,N,m,n);
POLYBENCH_2D_ARRAY_DECL(A,DATA_TYPE,M,M,m,m);
POLYBENCH_2D_ARRAY_DECL(B,DATA_TYPE,M,N,m,n);
/* Initialize array(s). */
init_array (m, n, &alpha, &beta,
POLYBENCH_ARRAY(C),
POLYBENCH_ARRAY(A),
POLYBENCH_ARRAY(B));
/* Start timer. */
polybench_start_instruments;
/* Run kernel. */
kernel_symm (m, n,
alpha, beta,
POLYBENCH_ARRAY(C),
POLYBENCH_ARRAY(A),
POLYBENCH_ARRAY(B));
/* 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(m, n, POLYBENCH_ARRAY(C)));
/* Be clean. */
POLYBENCH_FREE_ARRAY(C);
POLYBENCH_FREE_ARRAY(A);
POLYBENCH_FREE_ARRAY(B);
return 0;
}