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#include <stdio.h>
#include <math.h>
#include <stdlib.h>
#include <sys/times.h>
#include <unistd.h>

//-- setup and print matrices --------------------------------------------------

void
initGeMatrix(int m, int n, double *A, int incRowA, int incColA)
{
    int i, j;

    for (i=0; i<m; ++i) {
        for (j=0; j<n; ++j) {
            A[i*incRowA+j*incColA] = i*n + j + 1;
        }
    }
}

void
printGeMatrix(int m, int n, const double *A, int incRowA, int incColA)
{
    int i, j;

    for (i=0; i<m; ++i) {
        for (j=0; j<n; ++j) {
            printf("%10.4lf ", A[i*incRowA+j*incColA]);
        }
        printf("\n");
    }
    printf("\n\n");
}

//------------------------------------------------------------------------------

#ifndef DGEMM_MC
#define DGEMM_MC 8
#endif

#ifndef DGEMM_NC
#define DGEMM_NC 9
#endif

#ifndef DGEMM_KC
#define DGEMM_KC 10
#endif

#ifndef DGEMM_MR
#define DGEMM_MR 4
#endif

#ifndef DGEMM_NR
#define DGEMM_NR 3
#endif



//------------------------------------------------------------------------------

void
dpack_A(int m, int k, const double *A, int incRowA, int incColA, double *p)
{
    int i, i0, j, l, nu;
    int mp = (m+DGEMM_MR-1) / DGEMM_MR;

    printf("m=%d, k=%d, mp=%d\n", m, k, mp);

    for (j=0; j<k; ++j) {
        for (l=0; l<mp; ++l) {
            for (i0=0; i0<DGEMM_MR; ++i0) {
                i     = l*DGEMM_MR + i0;
                nu    = l*DGEMM_MR*k + j*DGEMM_MR + i0;
                p[nu] = (i<m) ? A[i*incRowA+j*incColA]
                              : 0;
            }
        }
    }
}

//------------------------------------------------------------------------------

#ifndef DIM_M
#define DIM_M 10
#endif

#ifndef DIM_K
#define DIM_K 12
#endif

#ifndef ROWMAJOR
#define INCROW_A 1
#define INCCOL_A DIM_M
#else
#define INCROW_A DIM_N
#define INCCOL_A 1
#endif

double A[DIM_M*DIM_K];
double A_buffer[DGEMM_MC*DGEMM_KC];

int
main()
{
    initGeMatrix(DIM_M, DIM_K, A, INCROW_A, INCCOL_A);

    printf("A=\n");
    printGeMatrix(DIM_M, DIM_K, A, INCROW_A, INCCOL_A);

    printf("Nach packen von Block links oben\n");
    dpack_A(DGEMM_MC, DGEMM_KC, A, INCROW_A, INCCOL_A, A_buffer);

    printf("A_buffer=\n");
    printGeMatrix(1, DGEMM_MC*DGEMM_KC, A_buffer, 0, 1);

    printf("Nach packen von Block rechts oben\n");
    // ... your code here ...

    printf("A_buffer=\n");
    printGeMatrix(1, DGEMM_MC*DGEMM_KC, A_buffer, 0, 1);

    printf("Nach packen von Block links unten\n");
    // ... your code here ...

    printf("A_buffer=\n");
    printGeMatrix(1, DGEMM_MC*DGEMM_KC, A_buffer, 0, 1);

    printf("Nach packen von Block rechts unten\n");
    // ... your code here ...

    printf("A_buffer=\n");
    printGeMatrix(1, DGEMM_MC*DGEMM_KC, A_buffer, 0, 1);

    return 0;
}





































































































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