FLA_Syr2k_lt_blk_var9.c File Reference

(r)

Functions
FLA_Error	FLA_Syr2k_lt_blk_var9 (FLA_Obj alpha, FLA_Obj A, FLA_Obj B, FLA_Obj beta, FLA_Obj C, fla_syr2k_t *cntl)

Function Documentation

FLA_Syr2k_lt_blk_var9()

FLA_Error FLA_Syr2k_lt_blk_var9	(	FLA_Obj	alpha,
		FLA_Obj	A,
		FLA_Obj	B,
		FLA_Obj	beta,
		FLA_Obj	C,
		fla_syr2k_t *	cntl )

{
  FLA_Obj AT,              A0,
          AB,              A1,
                           A2;
 
  FLA_Obj BT,              B0,
          BB,              B1,
                           B2;
 
  dim_t b;
 
  FLA_Scalr_internal( FLA_LOWER_TRIANGULAR, beta, C,
                      FLA_Cntl_sub_scalr( cntl ) );
 
  FLA_Part_2x1( A,    &AT, 
                      &AB,            0, FLA_TOP );
 
  FLA_Part_2x1( B,    &BT, 
                      &BB,            0, FLA_TOP );
 
  while ( FLA_Obj_length( AT ) < FLA_Obj_length( A ) ){
 
    b = FLA_Determine_blocksize( AB, FLA_BOTTOM, FLA_Cntl_blocksize( cntl ) );
 
    FLA_Repart_2x1_to_3x1( AT,                &A0, 
                        /* ** */            /* ** */
                                              &A1, 
                           AB,                &A2,        b, FLA_BOTTOM );
 
    FLA_Repart_2x1_to_3x1( BT,                &B0, 
                        /* ** */            /* ** */
                                              &B1, 
                           BB,                &B2,        b, FLA_BOTTOM );
 
    /*------------------------------------------------------------*/
 
    /* C = C + A1' * B1 + B1' * A1 */             
    FLA_Syr2k_internal( FLA_LOWER_TRIANGULAR, FLA_TRANSPOSE, 
                        alpha, A1, B1, FLA_ONE, C,
                        FLA_Cntl_sub_syr2k( cntl ) );
 
    /*------------------------------------------------------------*/
 
    FLA_Cont_with_3x1_to_2x1( &AT,                A0, 
                                                  A1, 
                            /* ** */           /* ** */
                              &AB,                A2,     FLA_TOP );
 
    FLA_Cont_with_3x1_to_2x1( &BT,                B0, 
                                                  B1, 
                            /* ** */           /* ** */
                              &BB,                B2,     FLA_TOP );
 
  }
 
  return FLA_SUCCESS;
}

References FLA_Cont_with_3x1_to_2x1(), FLA_Determine_blocksize(), FLA_Obj_length(), FLA_ONE, FLA_Part_2x1(), FLA_Repart_2x1_to_3x1(), FLA_Scalr_internal(), and FLA_Syr2k_internal().

Referenced by FLA_Syr2k_lt().