FLA_Ttmm_u_unb_var3.c File Reference

(r)


Functions

FLA_Error FLA_Ttmm_u_unb_var3 (FLA_Obj A)

Function Documentation

FLA_Error FLA_Ttmm_u_unb_var3 ( FLA_Obj  A  ) 

References FLA_Absolute_square(), FLA_Cont_with_3x3_to_2x2(), FLA_Dotcs_external(), FLA_Dots_external(), FLA_Obj_is_real(), FLA_Obj_length(), FLA_ONE, FLA_Part_2x2(), FLA_Repart_2x2_to_3x3(), and FLA_Trmv_external().

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 
00048     FLA_Repart_2x2_to_3x3( ATL, /**/ ATR,       &A00,  /**/ &a01,     &A02,
00049                         /* ************* */   /* ************************** */
00050                                                 &a10t, /**/ &alpha11, &a12t,
00051                            ABL, /**/ ABR,       &A20,  /**/ &a21,     &A22,
00052                            1, 1, FLA_BR );
00053 
00054     /*------------------------------------------------------------*/
00055 
00056     if ( FLA_Obj_is_real( A ) )
00057     {
00058       /* alpha11 = alpha11 * alpha11; */
00059       FLA_Absolute_square( alpha11 );
00060 
00061       /* alpha11 = alpha11 + a12t * a12t' */
00062       FLA_Dots_external( FLA_ONE, a12t, a12t, FLA_ONE, alpha11 );
00063 
00064       /* a12t  = a12t * triu( A22 )'; */
00065       /* a12t' = triu( A22 ) * a12t'; */
00066       FLA_Trmv_external( FLA_UPPER_TRIANGULAR, FLA_NO_TRANSPOSE, FLA_NONUNIT_DIAG,
00067                 A22, a12t );
00068     }
00069     else
00070     {
00071       /* alpha11 = alpha11 * alpha11'; */
00072       FLA_Absolute_square( alpha11 );
00073 
00074       /* alpha11 = alpha11 + a12t * a12t'; */
00075       FLA_Dotcs_external( FLA_CONJUGATE, FLA_ONE, a12t, a12t, FLA_ONE, alpha11 );
00076 
00077       /* a12t  = a12t * triu( A22 )'; */
00078       /* a12t' = triu( A22 ) * a12t'; */
00079       FLA_Trmv_external( FLA_UPPER_TRIANGULAR, FLA_CONJ_NO_TRANSPOSE, FLA_NONUNIT_DIAG,
00080                 A22, a12t );
00081     }
00082 
00083     /*------------------------------------------------------------*/
00084 
00085     FLA_Cont_with_3x3_to_2x2( &ATL, /**/ &ATR,       A00,  a01,     /**/ A02,
00086                                                      a10t, alpha11, /**/ a12t,
00087                             /* ************** */  /* ************************ */
00088                               &ABL, /**/ &ABR,       A20,  a21,     /**/ A22,
00089                               FLA_TL );
00090 
00091   }
00092 
00093   return FLA_SUCCESS;
00094 }


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