Functions | |
FLA_Error | FLA_Chol_l_blk_var1 (FLA_Obj A, fla_chol_t *cntl) |
FLA_Error FLA_Chol_l_blk_var1 | ( | FLA_Obj | A, | |
fla_chol_t * | cntl | |||
) |
References FLA_Chol_internal(), FLA_Cont_with_3x3_to_2x2(), FLA_Determine_blocksize(), FLA_Herk_internal(), FLA_MINUS_ONE, FLA_Obj_is_real(), FLA_Obj_length(), FLA_ONE, FLA_Part_2x2(), FLA_Repart_2x2_to_3x3(), FLA_Syrk_internal(), and FLA_Trsm_internal().
Referenced by FLA_Chol_l().
00038 { 00039 FLA_Obj ATL, ATR, A00, A01, A02, 00040 ABL, ABR, A10, A11, A12, 00041 A20, A21, A22; 00042 00043 dim_t b; 00044 00045 int value = 0; 00046 00047 FLA_Part_2x2( A, &ATL, &ATR, 00048 &ABL, &ABR, 0, 0, FLA_TL ); 00049 00050 while ( FLA_Obj_length( ATL ) < FLA_Obj_length( A ) ){ 00051 00052 b = FLA_Determine_blocksize( ABR, FLA_BR, FLA_Cntl_blocksize( cntl ) ); 00053 00054 FLA_Repart_2x2_to_3x3( ATL, /**/ ATR, &A00, /**/ &A01, &A02, 00055 /* ************* */ /* ******************** */ 00056 &A10, /**/ &A11, &A12, 00057 ABL, /**/ ABR, &A20, /**/ &A21, &A22, 00058 b, b, FLA_BR ); 00059 00060 /*------------------------------------------------------------*/ 00061 00062 if ( FLA_Obj_is_real( A ) ) 00063 { 00064 /* A10 = A10 * inv( tril( A00 )' ); */ 00065 FLA_Trsm_internal( FLA_RIGHT, FLA_LOWER_TRIANGULAR, 00066 FLA_TRANSPOSE, FLA_NONUNIT_DIAG, 00067 FLA_ONE, A00, A10, 00068 FLA_Cntl_sub_trsm( cntl ) ); 00069 00070 /* A11 = A11 - A10 * A10'; */ 00071 FLA_Syrk_internal( FLA_LOWER_TRIANGULAR, FLA_NO_TRANSPOSE, 00072 FLA_MINUS_ONE, A10, FLA_ONE, A11, 00073 FLA_Cntl_sub_syrk( cntl ) ); 00074 00075 /* A11 = chol( A11 ); */ 00076 value = FLA_Chol_internal( FLA_LOWER_TRIANGULAR, A11, 00077 FLA_Cntl_sub_chol( cntl ) ); 00078 00079 if ( value != FLA_SUCCESS ) 00080 return ( FLA_Obj_length( A00 ) + value ); 00081 } 00082 else 00083 { 00084 /* A10 = A10 * inv( tril( A00 )' ); */ 00085 FLA_Trsm_internal( FLA_RIGHT, FLA_LOWER_TRIANGULAR, 00086 FLA_CONJ_TRANSPOSE, FLA_NONUNIT_DIAG, 00087 FLA_ONE, A00, A10, 00088 FLA_Cntl_sub_trsm( cntl ) ); 00089 00090 /* A11 = A11 - A10 * A10'; */ 00091 FLA_Herk_internal( FLA_LOWER_TRIANGULAR, FLA_NO_TRANSPOSE, 00092 FLA_MINUS_ONE, A10, FLA_ONE, A11, 00093 FLA_Cntl_sub_herk( cntl ) ); 00094 00095 /* A11 = chol( A11 ); */ 00096 value = FLA_Chol_internal( FLA_LOWER_TRIANGULAR, A11, 00097 FLA_Cntl_sub_chol( cntl ) ); 00098 00099 if ( value != FLA_SUCCESS ) 00100 return ( FLA_Obj_length( A00 ) + value ); 00101 } 00102 00103 /*------------------------------------------------------------*/ 00104 00105 FLA_Cont_with_3x3_to_2x2( &ATL, /**/ &ATR, A00, A01, /**/ A02, 00106 A10, A11, /**/ A12, 00107 /* ************** */ /* ****************** */ 00108 &ABL, /**/ &ABR, A20, A21, /**/ A22, 00109 FLA_TL ); 00110 } 00111 00112 return value; 00113 }