FLA_Trinv_l_blk_var3.c File Reference

(r)


Functions

FLA_Error FLA_Trinv_l_blk_var3 (FLA_Diag diag, FLA_Obj A, fla_trinv_t *cntl)

Function Documentation

FLA_Error FLA_Trinv_l_blk_var3 ( FLA_Diag  diag,
FLA_Obj  A,
fla_trinv_t cntl 
)

References FLA_Cont_with_3x3_to_2x2(), FLA_Determine_blocksize(), FLA_Gemm_internal(), FLA_MINUS_ONE, FLA_Obj_length(), FLA_ONE, FLA_Part_2x2(), FLA_Repart_2x2_to_3x3(), FLA_Trinv_internal(), and FLA_Trsm_internal().

Referenced by FLA_Trinv_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   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     b = FLA_Determine_blocksize( ABR, FLA_BR, FLA_Cntl_blocksize( cntl ) );
00049 
00050     FLA_Repart_2x2_to_3x3( ATL, /**/ ATR,       &A00, /**/ &A01, &A02,
00051                         /* ************* */   /* ******************** */
00052                                                 &A10, /**/ &A11, &A12,
00053                            ABL, /**/ ABR,       &A20, /**/ &A21, &A22,
00054                            b, b, FLA_BR );
00055 
00056     /*------------------------------------------------------------*/
00057 
00058     /* A21 = -A21 / triu( A11 ) */
00059     FLA_Trsm_internal( FLA_RIGHT, FLA_LOWER_TRIANGULAR, FLA_NO_TRANSPOSE, diag, 
00060                        FLA_MINUS_ONE, A11, A21, 
00061                        FLA_Cntl_sub_trsm1( cntl ) );
00062 
00063     /* A20 = A21 * A10 + A20 */
00064     FLA_Gemm_internal( FLA_NO_TRANSPOSE, FLA_NO_TRANSPOSE,
00065                        FLA_ONE, A21, A10, FLA_ONE, A20, 
00066                        FLA_Cntl_sub_gemm( cntl ) );
00067 
00068     /* A10 = triu( A11 ) \ A10 */
00069     FLA_Trsm_internal( FLA_LEFT, FLA_LOWER_TRIANGULAR, FLA_NO_TRANSPOSE, diag, 
00070                        FLA_ONE, A11, A10, 
00071                        FLA_Cntl_sub_trsm2( cntl ) );
00072 
00073     /* A11 = inv( A11 ) */
00074     FLA_Trinv_internal( FLA_LOWER_TRIANGULAR, diag, A11,
00075                         FLA_Cntl_sub_trinv( cntl ) );
00076 
00077     /*------------------------------------------------------------*/
00078 
00079     FLA_Cont_with_3x3_to_2x2( &ATL, /**/ &ATR,       A00, A01, /**/ A02,
00080                                                      A10, A11, /**/ A12,
00081                             /* ************** */  /* ****************** */
00082                               &ABL, /**/ &ABR,       A20, A21, /**/ A22,
00083                               FLA_TL );
00084 
00085   }
00086 
00087   return FLA_SUCCESS;
00088 }


Generated on Mon Jul 6 05:45:56 2009 for libflame by  doxygen 1.5.9