bl1_maxabsmr.c File Reference

(r)

Functions
void	bl1_smaxabsmr (uplo1_t uplo, int m, int n, float *a, int a_rs, int a_cs, float *maxabs)
void	bl1_dmaxabsmr (uplo1_t uplo, int m, int n, double *a, int a_rs, int a_cs, double *maxabs)
void	bl1_cmaxabsmr (uplo1_t uplo, int m, int n, scomplex *a, int a_rs, int a_cs, float *maxabs)
void	bl1_zmaxabsmr (uplo1_t uplo, int m, int n, dcomplex *a, int a_rs, int a_cs, double *maxabs)

Function Documentation

bl1_cmaxabsmr()

void bl1_cmaxabsmr	(	uplo1_t	uplo,
		int	m,
		int	n,
		scomplex *	a,
		int	a_rs,
		int	a_cs,
		float *	maxabs )

{
    float     zero = bl1_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 ( bl1_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 ( bl1_is_row_storage( a_rs, a_cs ) )
    {
        bl1_swap_ints( n_iter, n_elem_max );
        bl1_swap_ints( lda, inca );
        bl1_toggle_uplo( uplo );
    }
 
    // Initialize the maximum absolute value candidate to the first element.
    bl1_csabsval2( a, &maxabs_cand );
 
    if ( bl1_is_upper( uplo ) )
    {
        for ( j = 0; j < n_iter; j++ )
        {
            n_elem  = bl1_min( j + 1, n_elem_max );
            a_begin = a + j*lda;
 
            bl1_cmaxabsv( n_elem,
                          a_begin, inca,
                          &maxabs_temp );
 
            if ( maxabs_temp > maxabs_cand ) maxabs_cand = maxabs_temp;
        }
    }
    else // if ( bl1_is_lower( uplo ) )
    {
        for ( j = 0; j < n_iter; j++ )
        {
            n_elem  = bl1_max( 0, n_elem_max - j );
            a_begin = a + j*lda + j*inca;
 
            bl1_cmaxabsv( n_elem,
                          a_begin, inca,
                          &maxabs_temp );
 
            if ( maxabs_temp > maxabs_cand ) maxabs_cand = maxabs_temp;
        }
    }
 
    *maxabs = maxabs_cand;
}

References bl1_cmaxabsv(), bl1_d0(), bl1_is_row_storage(), bl1_is_upper(), and bl1_zero_dim2().

Referenced by FLA_Max_abs_value_herm().

bl1_dmaxabsmr()

void bl1_dmaxabsmr	(	uplo1_t	uplo,
		int	m,
		int	n,
		double *	a,
		int	a_rs,
		int	a_cs,
		double *	maxabs )

{
    double    zero = bl1_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 ( bl1_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 ( bl1_is_row_storage( a_rs, a_cs ) )
    {
        bl1_swap_ints( n_iter, n_elem_max );
        bl1_swap_ints( lda, inca );
        bl1_toggle_uplo( uplo );
    }
 
    // Initialize the maximum absolute value candidate to the first element.
    bl1_dabsval2( a, &maxabs_cand );
 
    if ( bl1_is_upper( uplo ) )
    {
        for ( j = 0; j < n_iter; j++ )
        {
            n_elem  = bl1_min( j + 1, n_elem_max );
            a_begin = a + j*lda;
 
            bl1_dmaxabsv( n_elem,
                          a_begin, inca,
                          &maxabs_temp );
 
            if ( maxabs_temp > maxabs_cand ) maxabs_cand = maxabs_temp;
        }
    }
    else // if ( bl1_is_lower( uplo ) )
    {
        for ( j = 0; j < n_iter; j++ )
        {
            n_elem  = bl1_max( 0, n_elem_max - j );
            a_begin = a + j*lda + j*inca;
 
            bl1_dmaxabsv( n_elem,
                          a_begin, inca,
                          &maxabs_temp );
 
            if ( maxabs_temp > maxabs_cand ) maxabs_cand = maxabs_temp;
        }
    }
 
    *maxabs = maxabs_cand;
}

References bl1_d0(), bl1_dmaxabsv(), bl1_is_row_storage(), bl1_is_upper(), and bl1_zero_dim2().

Referenced by FLA_Max_abs_value_herm().

bl1_smaxabsmr()

void bl1_smaxabsmr	(	uplo1_t	uplo,
		int	m,
		int	n,
		float *	a,
		int	a_rs,
		int	a_cs,
		float *	maxabs )

{
    float     zero = bl1_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 ( bl1_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 ( bl1_is_row_storage( a_rs, a_cs ) )
    {
        bl1_swap_ints( n_iter, n_elem_max );
        bl1_swap_ints( lda, inca );
        bl1_toggle_uplo( uplo );
    }
 
    // Initialize the maximum absolute value candidate to the first element.
    bl1_sabsval2( a, &maxabs_cand );
 
    if ( bl1_is_upper( uplo ) )
    {
        for ( j = 0; j < n_iter; j++ )
        {
            n_elem  = bl1_min( j + 1, n_elem_max );
            a_begin = a + j*lda;
 
            bl1_smaxabsv( n_elem,
                          a_begin, inca,
                          &maxabs_temp );
 
            if ( maxabs_temp > maxabs_cand ) maxabs_cand = maxabs_temp;
        }
    }
    else // if ( bl1_is_lower( uplo ) )
    {
        for ( j = 0; j < n_iter; j++ )
        {
            n_elem  = bl1_max( 0, n_elem_max - j );
            a_begin = a + j*lda + j*inca;
 
            bl1_smaxabsv( n_elem,
                          a_begin, inca,
                          &maxabs_temp );
 
            if ( maxabs_temp > maxabs_cand ) maxabs_cand = maxabs_temp;
        }
    }
 
    *maxabs = maxabs_cand;
}

References bl1_is_row_storage(), bl1_is_upper(), bl1_s0(), bl1_smaxabsv(), and bl1_zero_dim2().

Referenced by FLA_Max_abs_value_herm().

bl1_zmaxabsmr()

void bl1_zmaxabsmr	(	uplo1_t	uplo,
		int	m,
		int	n,
		dcomplex *	a,
		int	a_rs,
		int	a_cs,
		double *	maxabs )

{
    double    zero = bl1_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 ( bl1_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 ( bl1_is_row_storage( a_rs, a_cs ) )
    {
        bl1_swap_ints( n_iter, n_elem_max );
        bl1_swap_ints( lda, inca );
        bl1_toggle_uplo( uplo );
    }
 
    // Initialize the maximum absolute value candidate to the first element.
    bl1_zdabsval2( a, &maxabs_cand );
 
    if ( bl1_is_upper( uplo ) )
    {
        for ( j = 0; j < n_iter; j++ )
        {
            n_elem  = bl1_min( j + 1, n_elem_max );
            a_begin = a + j*lda;
 
            bl1_zmaxabsv( n_elem,
                          a_begin, inca,
                          &maxabs_temp );
 
            if ( maxabs_temp > maxabs_cand ) maxabs_cand = maxabs_temp;
        }
    }
    else // if ( bl1_is_lower( uplo ) )
    {
        for ( j = 0; j < n_iter; j++ )
        {
            n_elem  = bl1_max( 0, n_elem_max - j );
            a_begin = a + j*lda + j*inca;
 
            bl1_zmaxabsv( n_elem,
                          a_begin, inca,
                          &maxabs_temp );
 
            if ( maxabs_temp > maxabs_cand ) maxabs_cand = maxabs_temp;
        }
    }
 
    *maxabs = maxabs_cand;
}

References bl1_d0(), bl1_is_row_storage(), bl1_is_upper(), bl1_zero_dim2(), and bl1_zmaxabsv().

Referenced by FLA_Max_abs_value_herm().