FLA_Syr2k_lt_unb_var10.c File Reference

(r)

Functions
FLA_Error	FLA_Syr2k_lt_unb_var10 (FLA_Obj alpha, FLA_Obj A, FLA_Obj B, FLA_Obj beta, FLA_Obj C)

Function Documentation

FLA_Syr2k_lt_unb_var10()

FLA_Error FLA_Syr2k_lt_unb_var10	(	FLA_Obj	alpha,
		FLA_Obj	A,
		FLA_Obj	B,
		FLA_Obj	beta,
		FLA_Obj	C )

{
  FLA_Obj AT,              A0,
          AB,              a1t,
                           A2;
 
  FLA_Obj BT,              B0,
          BB,              b1t,
                           B2;
 
  FLA_Scalr_external( FLA_LOWER_TRIANGULAR, beta, C );
 
  FLA_Part_2x1( A,    &AT, 
                      &AB,            0, FLA_BOTTOM );
 
  FLA_Part_2x1( B,    &BT, 
                      &BB,            0, FLA_BOTTOM );
 
  while ( FLA_Obj_length( AB ) < FLA_Obj_length( A ) ){
 
 
    FLA_Repart_2x1_to_3x1( AT,                &A0, 
                                              &a1t, 
                        /* ** */            /* ** */
                           AB,                &A2,        1, FLA_TOP );
 
    FLA_Repart_2x1_to_3x1( BT,                &B0, 
                                              &b1t, 
                        /* ** */            /* ** */
                           BB,                &B2,        1, FLA_TOP );
 
    /*------------------------------------------------------------*/
 
    /* C = C + a1t' * b1t + b1t' * a1t */
    FLA_Syr2_external( FLA_LOWER_TRIANGULAR, alpha, a1t, b1t, C );
 
    /*------------------------------------------------------------*/
 
    FLA_Cont_with_3x1_to_2x1( &AT,                A0, 
                            /* ** */           /* ** */
                                                  a1t, 
                              &AB,                A2,     FLA_BOTTOM );
 
    FLA_Cont_with_3x1_to_2x1( &BT,                B0, 
                            /* ** */           /* ** */
                                                  b1t, 
                              &BB,                B2,     FLA_BOTTOM );
 
  }
 
  return FLA_SUCCESS;
}

References FLA_Cont_with_3x1_to_2x1(), FLA_Obj_length(), FLA_Part_2x1(), FLA_Repart_2x1_to_3x1(), FLA_Scalr_external(), and FLA_Syr2_external().

Referenced by FLA_Syr2k_lt().