FLA_Gemv_n_blk_var6.c File Reference

(r12600)

Functions
FLA_Error	FLA_Gemv_n_blk_var6 (FLA_Obj alpha, FLA_Obj A, FLA_Obj x, FLA_Obj beta, FLA_Obj y, fla_gemv_t *cntl)

---

Function Documentation

FLA_Error FLA_Gemv_n_blk_var6	(	FLA_Obj	alpha,
		FLA_Obj	A,
		FLA_Obj	x,
		FLA_Obj	beta,
		FLA_Obj	y,
		fla_gemv_t *	cntl
	)

References FLA_Cont_with_1x3_to_1x2(), FLA_Cont_with_3x1_to_2x1(), FLA_Determine_blocksize(), FLA_Gemv_internal(), FLA_Obj_width(), FLA_ONE, FLA_Part_1x2(), FLA_Part_2x1(), FLA_Repart_1x2_to_1x3(), FLA_Repart_2x1_to_3x1(), and FLA_Scal_internal().

Referenced by FLA_Gemv_n().

{
  FLA_Obj AL,    AR,       A0,  A1,  A2;

  FLA_Obj xT,              x0,
          xB,              x1,
                           x2;

  dim_t b;

  FLA_Scal_internal( beta, y,
                     FLA_Cntl_sub_scal( cntl ) );

  FLA_Part_1x2( A,    &AL,  &AR,      0, FLA_RIGHT );

  FLA_Part_2x1( x,    &xT, 
                      &xB,            0, FLA_BOTTOM );

  while ( FLA_Obj_width( AR ) < FLA_Obj_width( A ) ){

    b = FLA_Determine_blocksize( AL, FLA_LEFT, FLA_Cntl_blocksize( cntl ) );

    FLA_Repart_1x2_to_1x3( AL,  /**/ AR,        &A0, &A1, /**/ &A2,
                           b, FLA_LEFT );

    FLA_Repart_2x1_to_3x1( xT,                &x0, 
                                              &x1, 
                        /* ** */            /* ** */
                           xB,                &x2,        b, FLA_TOP );

    /*------------------------------------------------------------*/

    /*   y = alpha * A1 * x1 + y;   */
    FLA_Gemv_internal( FLA_NO_TRANSPOSE, 
                       alpha, A1, x1, FLA_ONE, y, 
                       FLA_Cntl_sub_gemv( cntl ) );

    /*------------------------------------------------------------*/

    FLA_Cont_with_1x3_to_1x2( &AL,  /**/ &AR,        A0, /**/ A1, A2,
                              FLA_RIGHT );

    FLA_Cont_with_3x1_to_2x1( &xT,                x0, 
                            /* ** */           /* ** */
                                                  x1, 
                              &xB,                x2,     FLA_BOTTOM );

  }

  return FLA_SUCCESS;
}