FLA_LU_nopiv_unb_var5.c File Reference

(r)


Functions

FLA_Error FLA_LU_nopiv_unb_var5 (FLA_Obj A)

Function Documentation

FLA_Error FLA_LU_nopiv_unb_var5 ( FLA_Obj  A  ) 

References FLA_Cont_with_3x3_to_2x2(), FLA_Ger_external(), FLA_Inv_scal_external(), FLA_MINUS_ONE, FLA_Obj_length(), FLA_Obj_width(), FLA_Part_2x2(), and FLA_Repart_2x2_to_3x3().

00038 {
00039   FLA_Obj ATL,   ATR,      A00,  a01,     A02, 
00040           ABL,   ABR,      a10t, alpha11, a12t,
00041                            A20,  a21,     A22;
00042 
00043   FLA_Part_2x2( A,    &ATL, &ATR,
00044                       &ABL, &ABR,     0, 0, FLA_TL );
00045 
00046   while ( FLA_Obj_length( ATL ) < FLA_Obj_length( A ) &&
00047           FLA_Obj_width( ATL ) < FLA_Obj_width( A )){
00048 
00049     FLA_Repart_2x2_to_3x3( ATL, /**/ ATR,       &A00,  /**/ &a01,     &A02,
00050                         /* ************* */   /* ************************** */
00051                                                 &a10t, /**/ &alpha11, &a12t,
00052                            ABL, /**/ ABR,       &A20,  /**/ &a21,     &A22,
00053                            1, 1, FLA_BR );
00054 
00055     /*------------------------------------------------------------*/
00056 
00057     /* a21 = a21 / alpha11 */ 
00058     FLA_Inv_scal_external( alpha11, a21 );
00059 
00060     /* A22 = A22 - a21 * a12t */
00061     FLA_Ger_external( FLA_MINUS_ONE, a21, a12t, A22 );
00062 
00063     /*------------------------------------------------------------*/
00064 
00065     FLA_Cont_with_3x3_to_2x2( &ATL, /**/ &ATR,       A00,  a01,     /**/ A02,
00066                                                      a10t, alpha11, /**/ a12t,
00067                             /* ************** */  /* ************************ */
00068                               &ABL, /**/ &ABR,       A20,  a21,     /**/ A22,
00069                               FLA_TL );
00070 
00071   }
00072 
00073   return FLA_SUCCESS;
00074 }


Generated on Mon Jul 6 05:45:56 2009 for libflame by  doxygen 1.5.9