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Functions | |
FLA_Error | FLA_Chol_u_blk_var2 (FLA_Obj A, fla_chol_t *cntl) |
FLA_Error FLA_Chol_u_blk_var2 | ( | FLA_Obj | A, |
fla_chol_t * | cntl | ||
) |
References FLA_Chol_internal(), FLA_Cont_with_3x3_to_2x2(), FLA_Determine_blocksize(), FLA_Gemm_internal(), FLA_Herk_internal(), FLA_MINUS_ONE, FLA_Obj_length(), FLA_ONE, FLA_Part_2x2(), FLA_Repart_2x2_to_3x3(), and FLA_Trsm_internal().
Referenced by FLA_Chol_u().
{ FLA_Obj ATL, ATR, A00, A01, A02, ABL, ABR, A10, A11, A12, A20, A21, A22; dim_t b; int r_val = FLA_SUCCESS; FLA_Part_2x2( A, &ATL, &ATR, &ABL, &ABR, 0, 0, FLA_TL ); while ( FLA_Obj_length( ATL ) < FLA_Obj_length( A ) ){ b = FLA_Determine_blocksize( ABR, FLA_BR, FLA_Cntl_blocksize( cntl ) ); FLA_Repart_2x2_to_3x3( ATL, /**/ ATR, &A00, /**/ &A01, &A02, /* ************* */ /* ******************** */ &A10, /**/ &A11, &A12, ABL, /**/ ABR, &A20, /**/ &A21, &A22, b, b, FLA_BR ); /*------------------------------------------------------------*/ // A11 = A11 - A01' * A01 FLA_Herk_internal( FLA_UPPER_TRIANGULAR, FLA_CONJ_TRANSPOSE, FLA_MINUS_ONE, A01, FLA_ONE, A11, FLA_Cntl_sub_herk( cntl ) ); // A12 = A12 - A02' * A01 FLA_Gemm_internal( FLA_CONJ_TRANSPOSE, FLA_NO_TRANSPOSE, FLA_MINUS_ONE, A01, A02, FLA_ONE, A12, FLA_Cntl_sub_gemm( cntl ) ); // A11 = chol( A11 ) r_val = FLA_Chol_internal( FLA_UPPER_TRIANGULAR, A11, FLA_Cntl_sub_chol( cntl ) ); if ( r_val != FLA_SUCCESS ) return ( FLA_Obj_length( A00 ) + r_val ); // A12 = inv( triu( A11 )' ) * A12 FLA_Trsm_internal( FLA_LEFT, FLA_UPPER_TRIANGULAR, FLA_CONJ_TRANSPOSE, FLA_NONUNIT_DIAG, FLA_ONE, A11, A12, FLA_Cntl_sub_trsm( cntl ) ); /*------------------------------------------------------------*/ FLA_Cont_with_3x3_to_2x2( &ATL, /**/ &ATR, A00, A01, /**/ A02, A10, A11, /**/ A12, /* ************** */ /* ****************** */ &ABL, /**/ &ABR, A20, A21, /**/ A22, FLA_TL ); } return r_val; }