{
FLA_Obj ATL, ATR, A00, a01, A02,
ABL, ABR, a10t, alpha11, a12t,
A20, a21, A22;
FLA_Obj pT, p0,
pB, pi1,
p2;
FLA_Obj AB0, aB1, AB2;
FLA_Part_2x2( A, &ATL, &ATR,
&ABL, &ABR, 0, 0, FLA_TL );
FLA_Part_2x1( p, &pT,
&pB, 0, FLA_TOP );
while ( FLA_Obj_length( ATL ) < FLA_Obj_length( A ) &&
FLA_Obj_width( ATL ) < FLA_Obj_width( A )){
FLA_Repart_2x2_to_3x3( ATL, ATR, &A00, &a01, &A02,
&a10t, &alpha11, &a12t,
ABL, ABR, &A20, &a21, &A22,
1, 1, FLA_BR );
FLA_Repart_2x1_to_3x1( pT, &p0,
&pi1,
pB, &p2, 1, FLA_BOTTOM );
FLA_Trsv_external( FLA_LOWER_TRIANGULAR, FLA_NO_TRANSPOSE, FLA_UNIT_DIAG, A00, a01 );
FLA_Dots_external( FLA_MINUS_ONE, a10t, a01, FLA_ONE, alpha11 );
FLA_Gemv_external( FLA_NO_TRANSPOSE, FLA_MINUS_ONE, A20, a01, FLA_ONE, a21 );
FLA_Merge_2x1( alpha11,
a21, &aB1 );
FLA_Amax_external( aB1, pi1 );
FLA_Apply_pivots( FLA_LEFT, FLA_NO_TRANSPOSE, pi1, aB1 );
FLA_Merge_2x1( a10t,
A20, &AB0 );
FLA_Merge_2x1( a12t,
A22, &AB2 );
FLA_Apply_pivots( FLA_LEFT, FLA_NO_TRANSPOSE, pi1, AB0 );
FLA_Apply_pivots( FLA_LEFT, FLA_NO_TRANSPOSE, pi1, AB2 );
FLA_Inv_scal_external( alpha11, a21 );
FLA_Cont_with_3x3_to_2x2( &ATL, &ATR, A00, a01, A02,
a10t, alpha11, a12t,
&ABL, &ABR, A20, a21, A22,
FLA_TL );
FLA_Cont_with_3x1_to_2x1( &pT, p0,
pi1,
&pB, p2, FLA_TOP );
}
if ( FLA_Obj_width( ATR ) > 0 )
{
FLA_Trsm_external( FLA_LEFT, FLA_LOWER_TRIANGULAR,
FLA_NO_TRANSPOSE, FLA_UNIT_DIAG,
FLA_ONE, ATL, ATR );
}
return FLA_SUCCESS;
}