FLA_Bsvd.c File Reference

(r)

Functions
FLA_Error	FLA_Bsvd (FLA_Uplo uplo, FLA_Obj d, FLA_Obj e, FLA_Obj G, FLA_Obj H, FLA_Svd_type jobu, FLA_Obj U, FLA_Svd_type jobv, FLA_Obj V)

---

Function Documentation

FLA_Error FLA_Bsvd	(	FLA_Uplo	uplo,
		FLA_Obj	d,
		FLA_Obj	e,
		FLA_Obj	G,
		FLA_Obj	H,
		FLA_Svd_type	jobu,
		FLA_Obj	U,
		FLA_Svd_type	jobv,
		FLA_Obj	V
	)

References FLA_Bsvd_check(), FLA_Bsvd_ext_opt_var1(), FLA_Check_error_level(), FLA_Obj_vector_dim(), and FLA_Part_1x2().

{
  FLA_Error r_val      = FLA_SUCCESS;
  dim_t     n_iter_max = 30;
  dim_t     b_alg      = 512;
  dim_t     m_d        = FLA_Obj_vector_dim( d );
  FLA_Obj   C; // dummy variable

  // Check parameters.
  if ( FLA_Check_error_level() >= FLA_MIN_ERROR_CHECKING )
    FLA_Bsvd_check( uplo, d, e, G, H, jobu, U, jobv, V );

  // Partition U and V properly to account for the diagonal dimension.
  if ( jobu == FLA_SVD_VECTORS_MIN_COPY || 
       jobu == FLA_SVD_VECTORS_MIN_OVERWRITE )
    FLA_Part_1x2( U, &U, &C, m_d, FLA_LEFT );
  
  if ( jobv == FLA_SVD_VECTORS_MIN_COPY || 
       jobv == FLA_SVD_VECTORS_MIN_OVERWRITE )
    FLA_Part_1x2( V, &V, &C, m_d, FLA_LEFT );

  // The current Bsvd is implemented for the upper triangular matrix only.
  // If uplo is lower triangular, swap U and V.
  if ( uplo == FLA_LOWER_TRIANGULAR )
    exchange( U, V, C );
  
  r_val = FLA_Bsvd_ext_opt_var1 ( n_iter_max, d, e, G, H, 
                                  jobu, U, jobv, V, 
                                  FALSE, C,
                                  b_alg );

  return r_val;
}