Functions | |
FLA_Error | FLA_Chol_l_blk_var3 (FLA_Obj A, fla_chol_t *cntl) |
FLA_Error FLA_Chol_l_blk_var3 | ( | 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().
00036 { 00037 FLA_Obj ATL, ATR, A00, A01, A02, 00038 ABL, ABR, A10, A11, A12, 00039 A20, A21, A22; 00040 00041 dim_t b; 00042 00043 int value = 0; 00044 00045 FLA_Part_2x2( A, &ATL, &ATR, 00046 &ABL, &ABR, 0, 0, FLA_TL ); 00047 00048 while ( FLA_Obj_length( ATL ) < FLA_Obj_length( A ) ){ 00049 00050 b = FLA_Determine_blocksize( ABR, FLA_BR, FLA_Cntl_blocksize( cntl ) ); 00051 00052 FLA_Repart_2x2_to_3x3( ATL, /**/ ATR, &A00, /**/ &A01, &A02, 00053 /* ************* */ /* ******************** */ 00054 &A10, /**/ &A11, &A12, 00055 ABL, /**/ ABR, &A20, /**/ &A21, &A22, 00056 b, b, FLA_BR ); 00057 00058 /*------------------------------------------------------------*/ 00059 00060 if ( FLA_Obj_is_real( A ) ) 00061 { 00062 /* A11 = chol( A11 ); */ 00063 value = FLA_Chol_internal( FLA_LOWER_TRIANGULAR, A11, 00064 FLA_Cntl_sub_chol( cntl ) ); 00065 00066 if ( value != FLA_SUCCESS ) 00067 return ( FLA_Obj_length( A00 ) + value ); 00068 00069 /* A21 = A21 * inv( tril( A11 )' ); */ 00070 FLA_Trsm_internal( FLA_RIGHT, FLA_LOWER_TRIANGULAR, 00071 FLA_TRANSPOSE, FLA_NONUNIT_DIAG, 00072 FLA_ONE, A11, A21, 00073 FLA_Cntl_sub_trsm( cntl ) ); 00074 00075 /* A22 = A22 - A21 * A21'; */ 00076 FLA_Syrk_internal( FLA_LOWER_TRIANGULAR, FLA_NO_TRANSPOSE, 00077 FLA_MINUS_ONE, A21, FLA_ONE, A22, 00078 FLA_Cntl_sub_syrk( cntl ) ); 00079 } 00080 else 00081 { 00082 /* A11 = chol( A11 ); */ 00083 value = FLA_Chol_internal( FLA_LOWER_TRIANGULAR, A11, 00084 FLA_Cntl_sub_chol( cntl ) ); 00085 00086 if ( value != FLA_SUCCESS ) 00087 return ( FLA_Obj_length( A00 ) + value ); 00088 00089 /* A21 = A21 * inv( tril( A11 )' ); */ 00090 FLA_Trsm_internal( FLA_RIGHT, FLA_LOWER_TRIANGULAR, 00091 FLA_CONJ_TRANSPOSE, FLA_NONUNIT_DIAG, 00092 FLA_ONE, A11, A21, 00093 FLA_Cntl_sub_trsm( cntl ) ); 00094 00095 /* A22 = A22 - A21 * A21'; */ 00096 FLA_Herk_internal( FLA_LOWER_TRIANGULAR, FLA_NO_TRANSPOSE, 00097 FLA_MINUS_ONE, A21, FLA_ONE, A22, 00098 FLA_Cntl_sub_herk( cntl ) ); 00099 } 00100 00101 /*------------------------------------------------------------*/ 00102 00103 FLA_Cont_with_3x3_to_2x2( &ATL, /**/ &ATR, A00, A01, /**/ A02, 00104 A10, A11, /**/ A12, 00105 /* ************** */ /* ****************** */ 00106 &ABL, /**/ &ABR, A20, A21, /**/ A22, 00107 FLA_TL ); 00108 } 00109 00110 return value; 00111 }