FLA_Error FLA_Check_equal_vector_dims( FLA_Obj x, FLA_Obj y )
{
FLA_Error e_val = FLA_SUCCESS;
if ( FLA_Obj_vector_dim( x ) != FLA_Obj_vector_dim( y ) )
e_val = FLA_UNEQUAL_VECTOR_DIMS;
return e_val;
}
int FLAME_invert_ztau( FLA_Obj t )
{
dim_t m = FLA_Obj_vector_dim( t );
dim_t inc = FLA_Obj_vector_inc( t );
dcomplex* buff = FLA_Obj_buffer_at_view( t );
double one = 1.0;
double conjsign = one; // if conjugate -one;
double zero = 0.0;
double temp, s, xr_s, xi_s;
dcomplex* chi;
int i;
for ( i = 0; i < m; ++i )
{
chi = buff + i*inc;
s = bl1_fmaxabs( chi->real, chi->imag );
if ( s != zero )
{
xr_s = chi->real / s;
xi_s = chi->imag / s;
temp = xr_s * chi->real + xi_s * chi->imag;
chi->real = xr_s / temp;
chi->imag = conjsign * xi_s / temp;
}
}
return 0;
}
FLA_Error FLA_Tevd_eigval_v_opt_var1( FLA_Obj G, FLA_Obj d, FLA_Obj e, FLA_Obj k )
{
FLA_Datatype datatype;
int m_A, n_G;
int rs_G, cs_G;
int inc_d;
int inc_e;
datatype = FLA_Obj_datatype( d );
m_A = FLA_Obj_vector_dim( d );
n_G = FLA_Obj_width( G );
rs_G = FLA_Obj_row_stride( G );
cs_G = FLA_Obj_col_stride( G );
inc_d = FLA_Obj_vector_inc( d );
inc_e = FLA_Obj_vector_inc( e );
switch ( datatype )
{
case FLA_FLOAT:
{
scomplex* buff_G = FLA_COMPLEX_PTR( G );
float* buff_d = FLA_FLOAT_PTR( d );
float* buff_e = FLA_FLOAT_PTR( e );
int* buff_k = FLA_INT_PTR( k );
FLA_Tevd_eigval_v_ops_var1( m_A,
n_G,
buff_G, rs_G, cs_G,
buff_d, inc_d,
buff_e, inc_e,
buff_k );
break;
}
case FLA_DOUBLE:
{
dcomplex* buff_G = FLA_DOUBLE_COMPLEX_PTR( G );
double* buff_d = FLA_DOUBLE_PTR( d );
double* buff_e = FLA_DOUBLE_PTR( e );
int* buff_k = FLA_INT_PTR( k );
FLA_Tevd_eigval_v_opd_var1( m_A,
n_G,
buff_G, rs_G, cs_G,
buff_d, inc_d,
buff_e, inc_e,
buff_k );
break;
}
}
return FLA_SUCCESS;
}
FLA_Error FLA_Check_vector_dim( FLA_Obj x, dim_t expected_length )
{
FLA_Error e_val = FLA_SUCCESS;
if ( FLA_Obj_vector_dim( x ) != expected_length )
e_val = FLA_INVALID_VECTOR_DIM;
return e_val;
}
FLA_Error FLA_Check_vector_dim_min( FLA_Obj x, dim_t min_dim )
{
FLA_Error e_val = FLA_SUCCESS;
if ( FLA_Obj_vector_dim( x ) < min_dim )
e_val = FLA_VECTOR_DIM_BELOW_MIN;
return e_val;
}
FLA_Error FLA_Check_matrix_vector_dims( FLA_Trans trans, FLA_Obj A, FLA_Obj x, FLA_Obj y )
{
FLA_Error e_val = FLA_SUCCESS;
if ( trans == FLA_NO_TRANSPOSE || trans == FLA_CONJ_NO_TRANSPOSE )
{
if ( FLA_Obj_width( A ) != FLA_Obj_vector_dim( x ) )
e_val = FLA_NONCONFORMAL_DIMENSIONS;
if ( FLA_Obj_length( A ) != FLA_Obj_vector_dim( y ) )
e_val = FLA_NONCONFORMAL_DIMENSIONS;
}
else
{
if ( FLA_Obj_length( A ) != FLA_Obj_vector_dim( x ) )
e_val = FLA_NONCONFORMAL_DIMENSIONS;
if ( FLA_Obj_width( A ) != FLA_Obj_vector_dim( y ) )
e_val = FLA_NONCONFORMAL_DIMENSIONS;
}
return e_val;
}
// Transform tau.
int FLAME_invert_stau( FLA_Obj t )
{
dim_t m = FLA_Obj_vector_dim( t );
dim_t inc = FLA_Obj_vector_inc( t );
float* buff = FLA_Obj_buffer_at_view( t );
float one = 1.0F;
float zero = 0.0F;
float* chi;
int i;
for ( i = 0; i < m; ++i )
{
chi = buff + i*inc;
if ( *chi != zero )
*chi = ( one / *chi );
}
return 0;
}
FLA_Error FLA_Obj_extract_imag_part_check( FLA_Obj a, FLA_Obj b )
{
FLA_Error e_val;
e_val = FLA_Check_floating_object( a );
FLA_Check_error_code( e_val );
e_val = FLA_Check_real_object( b );
FLA_Check_error_code( e_val );
e_val = FLA_Check_nonconstant_object( b );
FLA_Check_error_code( e_val );
e_val = FLA_Check_identical_object_precision( a, b );
FLA_Check_error_code( e_val );
e_val = FLA_Check_vector_dim( a, FLA_Obj_vector_dim( b ) );
FLA_Check_error_code( e_val );
return FLA_SUCCESS;
}
FLA_Error FLA_Sort( FLA_Direct direct, FLA_Obj x )
{
FLA_Datatype datatype;
FLA_Obj x_use;
dim_t m_x;
dim_t inc_x;
if ( FLA_Check_error_level() >= FLA_MIN_ERROR_CHECKING )
FLA_Sort_check( direct, x );
datatype = FLA_Obj_datatype( x );
m_x = FLA_Obj_vector_dim( x );
inc_x = FLA_Obj_vector_inc( x );
// If the vector does not have unit stride, copy it to a temporary vector
// that does have unit stride.
if ( inc_x != 1 )
{
FLA_Obj_create_copy_of( FLA_NO_TRANSPOSE, x, &x_use );
inc_x = FLA_Obj_vector_inc( x_use );
}
else
{
x_use = x;
}
switch ( datatype )
{
case FLA_FLOAT:
{
float* x_p = ( float* ) FLA_FLOAT_PTR( x_use );
if ( direct == FLA_FORWARD )
FLA_Sort_f_ops( m_x,
x_p, inc_x );
else // if ( direct == FLA_BACKWARD )
FLA_Sort_b_ops( m_x,
x_p, inc_x );
break;
}
case FLA_DOUBLE:
{
double* x_p = ( double* ) FLA_DOUBLE_PTR( x_use );
if ( direct == FLA_FORWARD )
FLA_Sort_f_opd( m_x,
x_p, inc_x );
else // if ( direct == FLA_BACKWARD )
FLA_Sort_b_opd( m_x,
x_p, inc_x );
break;
}
}
if ( inc_x != 1 )
{
FLA_Copy( x_use, x );
FLA_Obj_free( &x_use );
}
return FLA_SUCCESS;
}
FLA_Error FLA_Tevd_v_opt_var2( dim_t n_iter_max, FLA_Obj d, FLA_Obj e, FLA_Obj G, FLA_Obj R, FLA_Obj W, FLA_Obj U, dim_t b_alg )
{
FLA_Error r_val = FLA_SUCCESS;
FLA_Datatype datatype;
int m_A, m_U, n_G;
int inc_d;
int inc_e;
int rs_G, cs_G;
int rs_R, cs_R;
int rs_U, cs_U;
int rs_W, cs_W;
datatype = FLA_Obj_datatype( U );
m_A = FLA_Obj_vector_dim( d );
m_U = FLA_Obj_length( U );
n_G = FLA_Obj_width( G );
inc_d = FLA_Obj_vector_inc( d );
inc_e = FLA_Obj_vector_inc( e );
rs_G = FLA_Obj_row_stride( G );
cs_G = FLA_Obj_col_stride( G );
rs_R = FLA_Obj_row_stride( R );
cs_R = FLA_Obj_col_stride( R );
rs_W = FLA_Obj_row_stride( W );
cs_W = FLA_Obj_col_stride( W );
rs_U = FLA_Obj_row_stride( U );
cs_U = FLA_Obj_col_stride( U );
switch ( datatype )
{
case FLA_FLOAT:
{
float* buff_d = FLA_FLOAT_PTR( d );
float* buff_e = FLA_FLOAT_PTR( e );
scomplex* buff_G = FLA_COMPLEX_PTR( G );
float* buff_R = FLA_FLOAT_PTR( R );
float* buff_W = FLA_FLOAT_PTR( W );
float* buff_U = FLA_FLOAT_PTR( U );
r_val = FLA_Tevd_v_ops_var2( m_A,
m_U,
n_G,
n_iter_max,
buff_d, inc_d,
buff_e, inc_e,
buff_G, rs_G, cs_G,
buff_R, rs_R, cs_R,
buff_W, rs_W, cs_W,
buff_U, rs_U, cs_U,
b_alg );
break;
}
case FLA_DOUBLE:
{
double* buff_d = FLA_DOUBLE_PTR( d );
double* buff_e = FLA_DOUBLE_PTR( e );
dcomplex* buff_G = FLA_DOUBLE_COMPLEX_PTR( G );
double* buff_R = FLA_DOUBLE_PTR( R );
double* buff_W = FLA_DOUBLE_PTR( W );
double* buff_U = FLA_DOUBLE_PTR( U );
r_val = FLA_Tevd_v_opd_var2( m_A,
m_U,
n_G,
n_iter_max,
buff_d, inc_d,
buff_e, inc_e,
buff_G, rs_G, cs_G,
buff_R, rs_R, cs_R,
buff_W, rs_W, cs_W,
buff_U, rs_U, cs_U,
b_alg );
break;
}
case FLA_COMPLEX:
{
float* buff_d = FLA_FLOAT_PTR( d );
float* buff_e = FLA_FLOAT_PTR( e );
scomplex* buff_G = FLA_COMPLEX_PTR( G );
float* buff_R = FLA_FLOAT_PTR( R );
scomplex* buff_W = FLA_COMPLEX_PTR( W );
scomplex* buff_U = FLA_COMPLEX_PTR( U );
r_val = FLA_Tevd_v_opc_var2( m_A,
m_U,
n_G,
n_iter_max,
buff_d, inc_d,
buff_e, inc_e,
buff_G, rs_G, cs_G,
buff_R, rs_R, cs_R,
buff_W, rs_W, cs_W,
buff_U, rs_U, cs_U,
b_alg );
break;
}
case FLA_DOUBLE_COMPLEX:
{
double* buff_d = FLA_DOUBLE_PTR( d );
double* buff_e = FLA_DOUBLE_PTR( e );
dcomplex* buff_G = FLA_DOUBLE_COMPLEX_PTR( G );
double* buff_R = FLA_DOUBLE_PTR( R );
dcomplex* buff_W = FLA_DOUBLE_COMPLEX_PTR( W );
dcomplex* buff_U = FLA_DOUBLE_COMPLEX_PTR( U );
r_val = FLA_Tevd_v_opz_var2( m_A,
m_U,
n_G,
n_iter_max,
buff_d, inc_d,
buff_e, inc_e,
buff_G, rs_G, cs_G,
buff_R, rs_R, cs_R,
buff_W, rs_W, cs_W,
buff_U, rs_U, cs_U,
b_alg );
break;
}
}
return r_val;
}
// According to the sorted order of a given vector s,
// U and V are reordered in columns while C is reordered
// in rows when they need to be applied.
FLA_Error FLA_Sort_bsvd_ext( FLA_Direct direct, FLA_Obj s,
FLA_Bool apply_U, FLA_Obj U,
FLA_Bool apply_V, FLA_Obj V,
FLA_Bool apply_C, FLA_Obj C )
{
FLA_Datatype datatype;
dim_t m_U, rs_U, cs_U;
dim_t m_V, rs_V, cs_V;
dim_t n_C, rs_C, cs_C;
dim_t m_s, inc_s;
//if ( FLA_Check_error_level() >= FLA_MIN_ERROR_CHECKING )
// FLA_Sort_bsvd_check( direct, s,
// apply_U, U,
// apply_V, V,
// apply_C, C );
// Sort singular values only; quick sort
if ( apply_U == FALSE && apply_V == FALSE )
return FLA_Sort( direct, s );
// s dimensions must be provided.
m_s = FLA_Obj_vector_dim( s );
inc_s = FLA_Obj_vector_inc( s );
// Datatype of U, V and C must be consistent and must be defined from one of them.
FLA_SORT_BSVD_EXT_DEFINE_OBJ_VARIABLES( U, apply_U, datatype, m_U, FLA_Obj_length, rs_U, cs_U );
FLA_SORT_BSVD_EXT_DEFINE_OBJ_VARIABLES( V, apply_V, datatype, m_V, FLA_Obj_length, rs_V, cs_V );
FLA_SORT_BSVD_EXT_DEFINE_OBJ_VARIABLES( C, apply_C, datatype, n_C, FLA_Obj_width, rs_C, cs_C );
switch ( datatype )
{
case FLA_FLOAT:
{
float* s_p = ( float* ) FLA_FLOAT_PTR( s );
float* U_p = ( apply_U == TRUE ? ( float* ) FLA_FLOAT_PTR( U ) : NULL );
float* V_p = ( apply_V == TRUE ? ( float* ) FLA_FLOAT_PTR( V ) : NULL );
float* C_p = ( apply_C == TRUE ? ( float* ) FLA_FLOAT_PTR( C ) : NULL );
if ( direct == FLA_FORWARD )
FLA_Sort_bsvd_ext_f_ops( m_s, s_p, inc_s,
m_U, U_p, rs_U, cs_U,
m_V, V_p, rs_V, cs_V,
n_C, C_p, rs_C, cs_C );
else // if ( direct == FLA_BACKWARD )
FLA_Sort_bsvd_ext_b_ops( m_s, s_p, inc_s,
m_U, U_p, rs_U, cs_U,
m_V, V_p, rs_V, cs_V,
n_C, C_p, rs_C, cs_C );
break;
}
case FLA_DOUBLE:
{
double* s_p = ( double* ) FLA_DOUBLE_PTR( s );
double* U_p = ( apply_U == TRUE ? ( double* ) FLA_DOUBLE_PTR( U ) : NULL );
double* V_p = ( apply_V == TRUE ? ( double* ) FLA_DOUBLE_PTR( V ) : NULL );
double* C_p = ( apply_C == TRUE ? ( double* ) FLA_DOUBLE_PTR( C ) : NULL );
if ( direct == FLA_FORWARD )
FLA_Sort_bsvd_ext_f_opd( m_s, s_p, inc_s,
m_U, U_p, rs_U, cs_U,
m_V, V_p, rs_V, cs_V,
n_C, C_p, rs_C, cs_C );
else // if ( direct == FLA_BACKWARD )
FLA_Sort_bsvd_ext_b_opd( m_s, s_p, inc_s,
m_U, U_p, rs_U, cs_U,
m_V, V_p, rs_V, cs_V,
n_C, C_p, rs_C, cs_C );
break;
}
case FLA_COMPLEX:
{
float* s_p = ( float* ) FLA_FLOAT_PTR( s );
scomplex* U_p = ( apply_U == TRUE ? ( scomplex* ) FLA_COMPLEX_PTR( U ) : NULL );
scomplex* V_p = ( apply_V == TRUE ? ( scomplex* ) FLA_COMPLEX_PTR( V ) : NULL );
scomplex* C_p = ( apply_C == TRUE ? ( scomplex* ) FLA_COMPLEX_PTR( C ) : NULL );
if ( direct == FLA_FORWARD )
FLA_Sort_bsvd_ext_f_opc( m_s, s_p, inc_s,
m_U, U_p, rs_U, cs_U,
m_V, V_p, rs_V, cs_V,
n_C, C_p, rs_C, cs_C );
else // if ( direct == FLA_BACKWARD )
FLA_Sort_bsvd_ext_b_opc( m_s, s_p, inc_s,
m_U, U_p, rs_U, cs_U,
m_V, V_p, rs_V, cs_V,
n_C, C_p, rs_C, cs_C );
break;
}
case FLA_DOUBLE_COMPLEX:
{
double* s_p = ( double* ) FLA_DOUBLE_PTR( s );
dcomplex* U_p = ( apply_U == TRUE ? ( dcomplex* ) FLA_DOUBLE_COMPLEX_PTR( U ) : NULL );
dcomplex* V_p = ( apply_V == TRUE ? ( dcomplex* ) FLA_DOUBLE_COMPLEX_PTR( V ) : NULL );
dcomplex* C_p = ( apply_C == TRUE ? ( dcomplex* ) FLA_DOUBLE_COMPLEX_PTR( C ) : NULL );
if ( direct == FLA_FORWARD )
FLA_Sort_bsvd_ext_f_opz( m_s, s_p, inc_s,
m_U, U_p, rs_U, cs_U,
m_V, V_p, rs_V, cs_V,
n_C, C_p, rs_C, cs_C );
else // if ( direct == FLA_BACKWARD )
FLA_Sort_bsvd_ext_b_opz( m_s, s_p, inc_s,
m_U, U_p, rs_U, cs_U,
m_V, V_p, rs_V, cs_V,
n_C, C_p, rs_C, cs_C );
break;
}
}
return FLA_SUCCESS;
}
FLA_Error FLA_Bidiag_UT_realify_diagonals_opt( FLA_Obj a, FLA_Obj b, FLA_Obj d, FLA_Obj e )
{
FLA_Datatype datatype;
int i, m, inc_a, inc_b, inc_d, inc_e;
datatype = FLA_Obj_datatype( a );
m = FLA_Obj_vector_dim( a );
inc_a = FLA_Obj_vector_inc( a );
inc_b = ( m > 1 ? FLA_Obj_vector_inc( b ) : 0 );
inc_d = FLA_Obj_vector_inc( d );
inc_e = FLA_Obj_vector_inc( e );
switch ( datatype )
{
case FLA_FLOAT:
{
float* buff_d = FLA_FLOAT_PTR( d );
float* buff_e = FLA_FLOAT_PTR( e );
float* buff_1 = FLA_FLOAT_PTR( FLA_ONE );
bl1_ssetv( m,
buff_1,
buff_d, inc_d );
bl1_ssetv( m,
buff_1,
buff_e, inc_e );
break;
}
case FLA_DOUBLE:
{
double* buff_d = FLA_DOUBLE_PTR( d );
double* buff_e = FLA_DOUBLE_PTR( e );
double* buff_1 = FLA_DOUBLE_PTR( FLA_ONE );
bl1_dsetv( m,
buff_1,
buff_d, inc_d );
bl1_dsetv( m,
buff_1,
buff_e, inc_e );
break;
}
case FLA_COMPLEX:
{
scomplex* buff_a = FLA_COMPLEX_PTR( a );
scomplex* buff_b = ( m > 1 ? FLA_COMPLEX_PTR( b ) : NULL );
scomplex* buff_d = FLA_COMPLEX_PTR( d );
scomplex* buff_e = FLA_COMPLEX_PTR( e );
scomplex* buff_1 = FLA_COMPLEX_PTR( FLA_ONE );
float* buff_0 = FLA_FLOAT_PTR( FLA_ZERO );
for ( i = 0; i < m; ++i )
{
scomplex* alpha1 = buff_a + (i )*inc_a;
scomplex* delta1 = buff_d + (i )*inc_d;
scomplex* epsilon1 = buff_e + (i )*inc_e;
scomplex absv;
if ( i == 0 )
{
*delta1 = *buff_1;
}
else
{
scomplex* beta1 = buff_b + (i-1)*inc_b;
if ( beta1->imag == 0.0F )
*delta1 = *buff_1;
else
{
bl1_ccopys( BLIS1_CONJUGATE, beta1, delta1 );
bl1_cabsval2( beta1, &absv );
bl1_cinvscals( &absv, delta1 );
bl1_cscals( delta1, beta1 );
beta1->imag = *buff_0;
bl1_cscals( delta1, alpha1 );
}
}
if ( alpha1->imag == 0.0F )
*epsilon1 = *buff_1;
else
{
bl1_ccopys( BLIS1_CONJUGATE, alpha1, epsilon1 );
bl1_cabsval2( alpha1, &absv );
bl1_cinvscals( &absv, epsilon1 );
bl1_cscals( epsilon1, alpha1 );
alpha1->imag = *buff_0;
}
if ( i < ( m - 1 ) )
{
scomplex* beta2 = buff_b + (i )*inc_b;
bl1_cscals( epsilon1, beta2 );
}
}
break;
}
case FLA_DOUBLE_COMPLEX:
{
dcomplex* buff_a = FLA_DOUBLE_COMPLEX_PTR( a );
dcomplex* buff_b = ( m > 1 ? FLA_DOUBLE_COMPLEX_PTR( b ) : NULL );
dcomplex* buff_d = FLA_DOUBLE_COMPLEX_PTR( d );
dcomplex* buff_e = FLA_DOUBLE_COMPLEX_PTR( e );
dcomplex* buff_1 = FLA_DOUBLE_COMPLEX_PTR( FLA_ONE );
double* buff_0 = FLA_DOUBLE_PTR( FLA_ZERO );
for ( i = 0; i < m; ++i )
{
dcomplex* alpha1 = buff_a + (i )*inc_a;
dcomplex* delta1 = buff_d + (i )*inc_d;
dcomplex* epsilon1 = buff_e + (i )*inc_e;
dcomplex absv;
if ( i == 0 )
{
*delta1 = *buff_1;
}
else
{
dcomplex* beta1 = buff_b + (i-1)*inc_b;
bl1_zcopys( BLIS1_CONJUGATE, beta1, delta1 );
bl1_zabsval2( beta1, &absv );
bl1_zinvscals( &absv, delta1 );
bl1_zscals( delta1, beta1 );
beta1->imag = *buff_0;
bl1_zscals( delta1, alpha1 );
}
bl1_zcopys( BLIS1_CONJUGATE, alpha1, epsilon1 );
bl1_zabsval2( alpha1, &absv );
bl1_zinvscals( &absv, epsilon1 );
bl1_zscals( epsilon1, alpha1 );
alpha1->imag = *buff_0;
if ( i < ( m - 1 ) )
{
dcomplex* beta2 = buff_b + (i )*inc_b;
bl1_zscals( epsilon1, beta2 );
}
}
break;
}
}
return FLA_SUCCESS;
}
FLA_Error FLA_Nrm2_external( FLA_Obj x, FLA_Obj norm_x )
{
FLA_Datatype datatype;
int num_elem;
int inc_x;
if ( FLA_Check_error_level() == FLA_FULL_ERROR_CHECKING )
FLA_Nrm2_check( x, norm_x );
if ( FLA_Obj_has_zero_dim( x ) )
{
FLA_Set( FLA_ZERO, norm_x );
return FLA_SUCCESS;
}
datatype = FLA_Obj_datatype( x );
inc_x = FLA_Obj_vector_inc( x );
num_elem = FLA_Obj_vector_dim( x );
switch ( datatype ){
case FLA_FLOAT:
{
float *buff_x = ( float * ) FLA_FLOAT_PTR( x );
float *buff_norm_x = ( float * ) FLA_FLOAT_PTR( norm_x );
bli_snrm2( num_elem,
buff_x, inc_x,
buff_norm_x );
break;
}
case FLA_DOUBLE:
{
double *buff_x = ( double * ) FLA_DOUBLE_PTR( x );
double *buff_norm_x = ( double * ) FLA_DOUBLE_PTR( norm_x );
bli_dnrm2( num_elem,
buff_x, inc_x,
buff_norm_x );
break;
}
case FLA_COMPLEX:
{
scomplex *buff_x = ( scomplex * ) FLA_COMPLEX_PTR( x );
float *buff_norm_x = ( float * ) FLA_COMPLEX_PTR( norm_x );
bli_cnrm2( num_elem,
buff_x, inc_x,
buff_norm_x );
break;
}
case FLA_DOUBLE_COMPLEX:
{
dcomplex *buff_x = ( dcomplex * ) FLA_DOUBLE_COMPLEX_PTR( x );
double *buff_norm_x = ( double * ) FLA_DOUBLE_COMPLEX_PTR( norm_x );
bli_znrm2( num_elem,
buff_x, inc_x,
buff_norm_x );
break;
}
}
return FLA_SUCCESS;
}
FLA_Error FLA_Househ3UD_UT( FLA_Obj chi_0, FLA_Obj x1, FLA_Obj y2, FLA_Obj tau )
/*
Compute an up-and-downdating UT Householder transformation
/ / 1 0 0 \ / 1 0 0 \ / 1 \ ( 1 u1' v2' ) \
H = | | 0 I 0 | - inv(tau) | 0 I 0 | | u1 | |
\ \ 0 0 I / \ 0 0 -I / \ v2 / /
by computing tau, u1, and v2 such that the following is satisfied:
/ chi_0 \ / alpha \
H | x1 | = | 0 |
\ y2 / \ 0 /
where
alpha = - lambda * chi_0 / | chi_0 |
lambda = sqrt( conj(chi0) chi0 + x1' x1 - y2' y2 )
/ chi_0 \
x = | x1 |
\ y2 /
tau = ( 1 + u1' u1 - v2' v2 ) / 2
u1 = x1 / ( chi_0 - alpha )
v2 = -y2 / ( chi_0 - alpha )
Upon completion, alpha, u1, and v2 have overwritten objects chi_0, x1,
and y2, respectively.
-FGVZ
*/
{
FLA_Datatype datatype;
int m_x1;
int m_y2;
int inc_x1;
int inc_y2;
datatype = FLA_Obj_datatype( x1 );
m_x1 = FLA_Obj_vector_dim( x1 );
m_y2 = FLA_Obj_vector_dim( y2 );
inc_x1 = FLA_Obj_vector_inc( x1 );
inc_y2 = FLA_Obj_vector_inc( y2 );
if ( FLA_Check_error_level() >= FLA_MIN_ERROR_CHECKING )
FLA_Househ3UD_UT_check( chi_0, x1, y2, tau );
switch ( datatype )
{
case FLA_FLOAT:
{
float* chi_0_p = ( float* ) FLA_FLOAT_PTR( chi_0 );
float* x1_p = ( float* ) FLA_FLOAT_PTR( x1 );
float* y2_p = ( float* ) FLA_FLOAT_PTR( y2 );
float* tau_p = ( float* ) FLA_FLOAT_PTR( tau );
FLA_Househ3UD_UT_ops( m_x1,
m_y2,
chi_0_p,
x1_p, inc_x1,
y2_p, inc_y2,
tau_p );
break;
}
case FLA_DOUBLE:
{
double* chi_0_p = ( double* ) FLA_DOUBLE_PTR( chi_0 );
double* x1_p = ( double* ) FLA_DOUBLE_PTR( x1 );
double* y2_p = ( double* ) FLA_DOUBLE_PTR( y2 );
double* tau_p = ( double* ) FLA_DOUBLE_PTR( tau );
FLA_Househ3UD_UT_opd( m_x1,
m_y2,
chi_0_p,
x1_p, inc_x1,
y2_p, inc_y2,
tau_p );
break;
}
case FLA_COMPLEX:
{
scomplex* chi_0_p = ( scomplex* ) FLA_COMPLEX_PTR( chi_0 );
scomplex* x1_p = ( scomplex* ) FLA_COMPLEX_PTR( x1 );
scomplex* y2_p = ( scomplex* ) FLA_COMPLEX_PTR( y2 );
scomplex* tau_p = ( scomplex* ) FLA_COMPLEX_PTR( tau );
FLA_Househ3UD_UT_opc( m_x1,
m_y2,
chi_0_p,
x1_p, inc_x1,
y2_p, inc_y2,
tau_p );
break;
}
case FLA_DOUBLE_COMPLEX:
{
dcomplex* chi_0_p = ( dcomplex* ) FLA_DOUBLE_COMPLEX_PTR( chi_0 );
dcomplex* x1_p = ( dcomplex* ) FLA_DOUBLE_COMPLEX_PTR( x1 );
dcomplex* y2_p = ( dcomplex* ) FLA_DOUBLE_COMPLEX_PTR( y2 );
dcomplex* tau_p = ( dcomplex* ) FLA_DOUBLE_COMPLEX_PTR( tau );
FLA_Househ3UD_UT_opz( m_x1,
m_y2,
chi_0_p,
x1_p, inc_x1,
y2_p, inc_y2,
tau_p );
break;
}
}
return FLA_SUCCESS;
}
FLA_Error FLA_Apply_pivots_rt_opt_var1( FLA_Obj p, FLA_Obj A )
{
FLA_Datatype datatype;
int m_A;
int rs_A, cs_A;
int inc_p;
int k1_0, k2_0;
datatype = FLA_Obj_datatype( A );
m_A = FLA_Obj_length( A );
// Swap the stride; FLA_Apply_pivots_ln_ops_var1 already consider the memory access pattern.
cs_A = FLA_Obj_row_stride( A );
rs_A = FLA_Obj_col_stride( A );
// Use minus increment of the ln version.
inc_p = FLA_Obj_vector_inc( p );
// Use zero-based indices.
k1_0 = 0;
k2_0 = ( int ) FLA_Obj_vector_dim( p ) - 1;
switch ( datatype )
{
case FLA_INT:
{
int* buff_A = FLA_INT_PTR( A );
int* buff_p = FLA_INT_PTR( p );
FLA_Apply_pivots_ln_opi_var1( m_A,
buff_A, rs_A, cs_A,
k1_0,
k2_0,
buff_p, inc_p );
break;
}
case FLA_FLOAT:
{
float* buff_A = FLA_FLOAT_PTR( A );
int* buff_p = FLA_INT_PTR( p );
FLA_Apply_pivots_ln_ops_var1( m_A,
buff_A, rs_A, cs_A,
k1_0,
k2_0,
buff_p, inc_p );
break;
}
case FLA_DOUBLE:
{
double* buff_A = FLA_DOUBLE_PTR( A );
int* buff_p = FLA_INT_PTR( p );
FLA_Apply_pivots_ln_opd_var1( m_A,
buff_A, rs_A, cs_A,
k1_0,
k2_0,
buff_p, inc_p );
break;
}
case FLA_COMPLEX:
{
scomplex* buff_A = FLA_COMPLEX_PTR( A );
int* buff_p = FLA_INT_PTR( p );
FLA_Apply_pivots_ln_opc_var1( m_A,
buff_A, rs_A, cs_A,
k1_0,
k2_0,
buff_p, inc_p );
break;
}
case FLA_DOUBLE_COMPLEX:
{
dcomplex* buff_A = FLA_DOUBLE_COMPLEX_PTR( A );
int* buff_p = FLA_INT_PTR( p );
FLA_Apply_pivots_ln_opz_var1( m_A,
buff_A, rs_A, cs_A,
k1_0,
k2_0,
buff_p, inc_p );
break;
}
}
return FLA_SUCCESS;
}
FLA_Error FLA_Bidiag_apply_V_external( FLA_Side side, FLA_Trans trans, FLA_Obj A, FLA_Obj t, FLA_Obj B )
{
int info = 0;
#ifdef FLA_ENABLE_EXTERNAL_LAPACK_INTERFACES
FLA_Datatype datatype;
// int m_A, n_A;
int m_B, n_B;
int cs_A;
int cs_B;
int k_t;
int lwork;
FLA_Obj work;
char blas_side;
char blas_vect = 'P';
char blas_trans;
int i;
//if ( FLA_Check_error_level() == FLA_FULL_ERROR_CHECKING )
// FLA_Apply_Q_check( side, trans, storev, A, t, B );
if ( FLA_Obj_has_zero_dim( A ) ) return FLA_SUCCESS;
datatype = FLA_Obj_datatype( A );
// m_A = FLA_Obj_length( A );
// n_A = FLA_Obj_width( A );
cs_A = FLA_Obj_col_stride( A );
m_B = FLA_Obj_length( B );
n_B = FLA_Obj_width( B );
cs_B = FLA_Obj_col_stride( B );
if ( blas_vect == 'Q' ) k_t = FLA_Obj_vector_dim( t );
else k_t = FLA_Obj_vector_dim( t ) + 1;
if ( FLA_Obj_is_real( A ) && trans == FLA_CONJ_TRANSPOSE )
trans = FLA_TRANSPOSE;
FLA_Param_map_flame_to_netlib_side( side, &blas_side );
FLA_Param_map_flame_to_netlib_trans( trans, &blas_trans );
// Make a workspace query the first time through. This will provide us with
// and ideal workspace size based on an internal block size.
lwork = -1;
FLA_Obj_create( datatype, 1, 1, 0, 0, &work );
for ( i = 0; i < 2; ++i )
{
if ( i == 1 )
{
// Grab the queried ideal workspace size from the work array, free the
// work object, and then re-allocate the workspace with the ideal size.
if ( datatype == FLA_FLOAT || datatype == FLA_COMPLEX )
lwork = ( int ) *FLA_FLOAT_PTR( work );
else if ( datatype == FLA_DOUBLE || datatype == FLA_DOUBLE_COMPLEX )
lwork = ( int ) *FLA_DOUBLE_PTR( work );
FLA_Obj_free( &work );
FLA_Obj_create( datatype, lwork, 1, 0, 0, &work );
}
switch( datatype ){
case FLA_FLOAT:
{
float *buff_A = ( float * ) FLA_FLOAT_PTR( A );
float *buff_t = ( float * ) FLA_FLOAT_PTR( t );
float *buff_B = ( float * ) FLA_FLOAT_PTR( B );
float *buff_work = ( float * ) FLA_FLOAT_PTR( work );
F77_sormbr( &blas_vect,
&blas_side,
&blas_trans,
&m_B,
&n_B,
&k_t,
buff_A, &cs_A,
buff_t,
buff_B, &cs_B,
buff_work, &lwork,
&info );
break;
}
case FLA_DOUBLE:
{
double *buff_A = ( double * ) FLA_DOUBLE_PTR( A );
double *buff_t = ( double * ) FLA_DOUBLE_PTR( t );
double *buff_B = ( double * ) FLA_DOUBLE_PTR( B );
double *buff_work = ( double * ) FLA_DOUBLE_PTR( work );
F77_dormbr( &blas_vect,
&blas_side,
&blas_trans,
&m_B,
&n_B,
&k_t,
buff_A, &cs_A,
buff_t,
buff_B, &cs_B,
buff_work, &lwork,
&info );
break;
}
case FLA_COMPLEX:
{
scomplex *buff_A = ( scomplex * ) FLA_COMPLEX_PTR( A );
scomplex *buff_t = ( scomplex * ) FLA_COMPLEX_PTR( t );
scomplex *buff_B = ( scomplex * ) FLA_COMPLEX_PTR( B );
scomplex *buff_work = ( scomplex * ) FLA_COMPLEX_PTR( work );
F77_cunmbr( &blas_vect,
&blas_side,
&blas_trans,
&m_B,
&n_B,
&k_t,
buff_A, &cs_A,
buff_t,
buff_B, &cs_B,
buff_work, &lwork,
&info );
break;
}
case FLA_DOUBLE_COMPLEX:
{
dcomplex *buff_A = ( dcomplex * ) FLA_DOUBLE_COMPLEX_PTR( A );
dcomplex *buff_t = ( dcomplex * ) FLA_DOUBLE_COMPLEX_PTR( t );
dcomplex *buff_B = ( dcomplex * ) FLA_DOUBLE_COMPLEX_PTR( B );
dcomplex *buff_work = ( dcomplex * ) FLA_DOUBLE_COMPLEX_PTR( work );
F77_zunmbr( &blas_vect,
&blas_side,
&blas_trans,
&m_B,
&n_B,
&k_t,
buff_A, &cs_A,
buff_t,
buff_B, &cs_B,
buff_work, &lwork,
&info );
break;
}
}
}
FLA_Obj_free( &work );
#else
FLA_Check_error_code( FLA_EXTERNAL_LAPACK_NOT_IMPLEMENTED );
#endif
return info;
}
FLA_Error FLA_Bsvd_sinval_v_opt_var1( FLA_Obj tol, FLA_Obj thresh,
FLA_Obj G, FLA_Obj H,
FLA_Obj d, FLA_Obj e,
FLA_Obj k )
{
FLA_Datatype datatype;
int m_A, n_GH;
int rs_G, cs_G;
int rs_H, cs_H;
int inc_d;
int inc_e;
datatype = FLA_Obj_datatype( d );
m_A = FLA_Obj_vector_dim( d );
n_GH = FLA_Obj_width( G );
rs_G = FLA_Obj_row_stride( G );
cs_G = FLA_Obj_col_stride( G );
rs_H = FLA_Obj_row_stride( H );
cs_H = FLA_Obj_col_stride( H );
inc_d = FLA_Obj_vector_inc( d );
inc_e = FLA_Obj_vector_inc( e );
switch ( datatype )
{
case FLA_FLOAT:
{
float* buff_tol = FLA_FLOAT_PTR( tol );
float* buff_thresh = FLA_FLOAT_PTR( thresh );
scomplex* buff_G = FLA_COMPLEX_PTR( G );
scomplex* buff_H = FLA_COMPLEX_PTR( H );
float* buff_d = FLA_FLOAT_PTR( d );
float* buff_e = FLA_FLOAT_PTR( e );
int* buff_k = FLA_INT_PTR( k );
FLA_Bsvd_sinval_v_ops_var1( m_A,
n_GH,
9,
*buff_tol,
*buff_thresh,
buff_G, rs_G, cs_G,
buff_H, rs_H, cs_H,
buff_d, inc_d,
buff_e, inc_e,
buff_k );
break;
}
case FLA_DOUBLE:
{
double* buff_tol = FLA_DOUBLE_PTR( tol );
double* buff_thresh = FLA_DOUBLE_PTR( thresh );
dcomplex* buff_G = FLA_DOUBLE_COMPLEX_PTR( G );
dcomplex* buff_H = FLA_DOUBLE_COMPLEX_PTR( H );
double* buff_d = FLA_DOUBLE_PTR( d );
double* buff_e = FLA_DOUBLE_PTR( e );
int* buff_k = FLA_INT_PTR( k );
FLA_Bsvd_sinval_v_opd_var1( m_A,
n_GH,
9,
*buff_tol,
*buff_thresh,
buff_G, rs_G, cs_G,
buff_H, rs_H, cs_H,
buff_d, inc_d,
buff_e, inc_e,
buff_k );
break;
}
}
return FLA_SUCCESS;
}
FLA_Error FLA_Fill_with_logarithmic_dist( FLA_Obj alpha, FLA_Obj x )
{
FLA_Obj lT, l0,
lB, lambda1,
l2;
FLA_Obj l, k, alpha2;
FLA_Datatype dt_real;
dim_t n_x;
if ( FLA_Check_error_level() >= FLA_MIN_ERROR_CHECKING )
FLA_Fill_with_logarithmic_dist_check( alpha, x );
dt_real = FLA_Obj_datatype_proj_to_real( x );
n_x = FLA_Obj_vector_dim( x );
// Create a local counter to increment as we create the distribution.
FLA_Obj_create( dt_real, 1, 1, 0, 0, &k );
// Create a local vector l. We will work with this vector, which is
// the same length as x, so that we can use vertical partitioning.
FLA_Obj_create( dt_real, n_x, 1, 0, 0, &l );
// Create a local real scalar alpha2 of the same precision as
// alpha. Then copy alpha to alpha2, which will convert the
// complex value to real, if necessary (ie: if alpha is complex).
FLA_Obj_create( dt_real, 1, 1, 0, 0, &alpha2 );
FLA_Copy( alpha, alpha2 );
// Initialize k to 0.
FLA_Set( FLA_ZERO, k );
FLA_Part_2x1( l, &lT,
&lB, 0, FLA_TOP );
while ( FLA_Obj_length( lB ) > 0 )
{
FLA_Repart_2x1_to_3x1( lT, &l0,
/* ** */ /* ******* */
&lambda1,
lB, &l2, 1, FLA_BOTTOM );
/*------------------------------------------------------------*/
// lambda1 = alpha^k;
FLA_Pow( alpha2, k, lambda1 );
// k = k + 1;
FLA_Mult_add( FLA_ONE, FLA_ONE, k );
/*------------------------------------------------------------*/
FLA_Cont_with_3x1_to_2x1( &lT, l0,
lambda1,
/* ** */ /* ******* */
&lB, l2, FLA_TOP );
}
// Normalize by last element.
FLA_Part_2x1( l, &lT,
&lB, 1, FLA_BOTTOM );
FLA_Inv_scal( lB, l );
// Overwrite x with the distribution we created in l.
FLA_Copy( l, x );
FLA_Obj_free( &l );
FLA_Obj_free( &k );
FLA_Obj_free( &alpha2 );
return FLA_SUCCESS;
}
