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Functions
bli_maxabsmr.c File Reference

(r)

Functions

void bli_smaxabsmr (uplo_t uplo, int m, int n, float *a, int a_rs, int a_cs, float *maxabs)
void bli_dmaxabsmr (uplo_t uplo, int m, int n, double *a, int a_rs, int a_cs, double *maxabs)
void bli_cmaxabsmr (uplo_t uplo, int m, int n, scomplex *a, int a_rs, int a_cs, float *maxabs)
void bli_zmaxabsmr (uplo_t uplo, int m, int n, dcomplex *a, int a_rs, int a_cs, double *maxabs)

Function Documentation

void bli_cmaxabsmr ( uplo_t  uplo,
int  m,
int  n,
scomplex a,
int  a_rs,
int  a_cs,
float *  maxabs 
)

References bli_cmaxabsv(), bli_d0(), bli_is_row_storage(), bli_is_upper(), and bli_zero_dim2().

Referenced by FLA_Max_abs_value_herm().

{
    float     zero = bli_d0();
    scomplex* a_begin;
    float     maxabs_cand;
    float     maxabs_temp;
    int       inca, lda;
    int       n_iter;
    int       n_elem_max;
    int       n_elem;
    int       j;

    // Return early if possible.
    if ( bli_zero_dim2( m, n ) ) { *maxabs = zero; return; }

    // Initialize with optimal values for column-major storage.
    n_iter     = n;
    n_elem_max = m;
    lda        = a_cs;
    inca       = a_rs;

    // An optimization: if A is row-major, then let's access the matrix by
    // rows instead of by columns for increased spatial locality.
    if ( bli_is_row_storage( a_rs, a_cs ) )
    {
        bli_swap_ints( n_iter, n_elem_max );
        bli_swap_ints( lda, inca );
        bli_toggle_uplo( uplo );
    }

    // Initialize the maximum absolute value candidate to the first element.
    bli_csabsval2( a, &maxabs_cand );

    if ( bli_is_upper( uplo ) )
    {
        for ( j = 0; j < n_iter; j++ )
        {
            n_elem  = bli_min( j + 1, n_elem_max );
            a_begin = a + j*lda;

            bli_cmaxabsv( n_elem,
                          a_begin, inca,
                          &maxabs_temp );

            if ( maxabs_temp > maxabs_cand ) maxabs_cand = maxabs_temp;
        }
    }
    else // if ( bli_is_lower( uplo ) )
    {
        for ( j = 0; j < n_iter; j++ )
        {
            n_elem  = bli_max( 0, n_elem_max - j );
            a_begin = a + j*lda + j*inca;

            bli_cmaxabsv( n_elem,
                          a_begin, inca,
                          &maxabs_temp );

            if ( maxabs_temp > maxabs_cand ) maxabs_cand = maxabs_temp;
        }
    }

    *maxabs = maxabs_cand;
}
void bli_dmaxabsmr ( uplo_t  uplo,
int  m,
int  n,
double *  a,
int  a_rs,
int  a_cs,
double *  maxabs 
)

References bli_d0(), bli_dmaxabsv(), bli_is_row_storage(), bli_is_upper(), and bli_zero_dim2().

Referenced by FLA_Max_abs_value_herm().

{
    double    zero = bli_d0();
    double*   a_begin;
    double    maxabs_cand;
    double    maxabs_temp;
    int       inca, lda;
    int       n_iter;
    int       n_elem_max;
    int       n_elem;
    int       j;

    // Return early if possible.
    if ( bli_zero_dim2( m, n ) ) { *maxabs = zero; return; }

    // Initialize with optimal values for column-major storage.
    n_iter     = n;
    n_elem_max = m;
    lda        = a_cs;
    inca       = a_rs;

    // An optimization: if A is row-major, then let's access the matrix by
    // rows instead of by columns for increased spatial locality.
    if ( bli_is_row_storage( a_rs, a_cs ) )
    {
        bli_swap_ints( n_iter, n_elem_max );
        bli_swap_ints( lda, inca );
        bli_toggle_uplo( uplo );
    }

    // Initialize the maximum absolute value candidate to the first element.
    bli_dabsval2( a, &maxabs_cand );

    if ( bli_is_upper( uplo ) )
    {
        for ( j = 0; j < n_iter; j++ )
        {
            n_elem  = bli_min( j + 1, n_elem_max );
            a_begin = a + j*lda;

            bli_dmaxabsv( n_elem,
                          a_begin, inca,
                          &maxabs_temp );

            if ( maxabs_temp > maxabs_cand ) maxabs_cand = maxabs_temp;
        }
    }
    else // if ( bli_is_lower( uplo ) )
    {
        for ( j = 0; j < n_iter; j++ )
        {
            n_elem  = bli_max( 0, n_elem_max - j );
            a_begin = a + j*lda + j*inca;

            bli_dmaxabsv( n_elem,
                          a_begin, inca,
                          &maxabs_temp );

            if ( maxabs_temp > maxabs_cand ) maxabs_cand = maxabs_temp;
        }
    }

    *maxabs = maxabs_cand;
}
void bli_smaxabsmr ( uplo_t  uplo,
int  m,
int  n,
float *  a,
int  a_rs,
int  a_cs,
float *  maxabs 
)

References bli_is_row_storage(), bli_is_upper(), bli_s0(), bli_smaxabsv(), and bli_zero_dim2().

Referenced by FLA_Max_abs_value_herm().

{
    float     zero = bli_s0();
    float*    a_begin;
    float     maxabs_cand;
    float     maxabs_temp;
    int       inca, lda;
    int       n_iter;
    int       n_elem_max;
    int       n_elem;
    int       j;

    // Return early if possible.
    if ( bli_zero_dim2( m, n ) ) { *maxabs = zero; return; }

    // Initialize with optimal values for column-major storage.
    n_iter     = n;
    n_elem_max = m;
    lda        = a_cs;
    inca       = a_rs;

    // An optimization: if A is row-major, then let's access the matrix by
    // rows instead of by columns for increased spatial locality.
    if ( bli_is_row_storage( a_rs, a_cs ) )
    {
        bli_swap_ints( n_iter, n_elem_max );
        bli_swap_ints( lda, inca );
        bli_toggle_uplo( uplo );
    }

    // Initialize the maximum absolute value candidate to the first element.
    bli_sabsval2( a, &maxabs_cand );

    if ( bli_is_upper( uplo ) )
    {
        for ( j = 0; j < n_iter; j++ )
        {
            n_elem  = bli_min( j + 1, n_elem_max );
            a_begin = a + j*lda;

            bli_smaxabsv( n_elem,
                          a_begin, inca,
                          &maxabs_temp );

            if ( maxabs_temp > maxabs_cand ) maxabs_cand = maxabs_temp;
        }
    }
    else // if ( bli_is_lower( uplo ) )
    {
        for ( j = 0; j < n_iter; j++ )
        {
            n_elem  = bli_max( 0, n_elem_max - j );
            a_begin = a + j*lda + j*inca;

            bli_smaxabsv( n_elem,
                          a_begin, inca,
                          &maxabs_temp );

            if ( maxabs_temp > maxabs_cand ) maxabs_cand = maxabs_temp;
        }
    }

    *maxabs = maxabs_cand;
}
void bli_zmaxabsmr ( uplo_t  uplo,
int  m,
int  n,
dcomplex a,
int  a_rs,
int  a_cs,
double *  maxabs 
)

References bli_d0(), bli_is_row_storage(), bli_is_upper(), bli_zero_dim2(), and bli_zmaxabsv().

Referenced by FLA_Max_abs_value_herm().

{
    double    zero = bli_d0();
    dcomplex* a_begin;
    double    maxabs_cand;
    double    maxabs_temp;
    int       inca, lda;
    int       n_iter;
    int       n_elem_max;
    int       n_elem;
    int       j;

    // Return early if possible.
    if ( bli_zero_dim2( m, n ) ) { *maxabs = zero; return; }

    // Initialize with optimal values for column-major storage.
    n_iter     = n;
    n_elem_max = m;
    lda        = a_cs;
    inca       = a_rs;

    // An optimization: if A is row-major, then let's access the matrix by
    // rows instead of by columns for increased spatial locality.
    if ( bli_is_row_storage( a_rs, a_cs ) )
    {
        bli_swap_ints( n_iter, n_elem_max );
        bli_swap_ints( lda, inca );
        bli_toggle_uplo( uplo );
    }

    // Initialize the maximum absolute value candidate to the first element.
    bli_zdabsval2( a, &maxabs_cand );

    if ( bli_is_upper( uplo ) )
    {
        for ( j = 0; j < n_iter; j++ )
        {
            n_elem  = bli_min( j + 1, n_elem_max );
            a_begin = a + j*lda;

            bli_zmaxabsv( n_elem,
                          a_begin, inca,
                          &maxabs_temp );

            if ( maxabs_temp > maxabs_cand ) maxabs_cand = maxabs_temp;
        }
    }
    else // if ( bli_is_lower( uplo ) )
    {
        for ( j = 0; j < n_iter; j++ )
        {
            n_elem  = bli_max( 0, n_elem_max - j );
            a_begin = a + j*lda + j*inca;

            bli_zmaxabsv( n_elem,
                          a_begin, inca,
                          &maxabs_temp );

            if ( maxabs_temp > maxabs_cand ) maxabs_cand = maxabs_temp;
        }
    }

    *maxabs = maxabs_cand;
}