FLA_Trsm_lun_blk_var1.c File Reference

(r)


Functions

FLA_Error FLA_Trsm_lun_blk_var1 (FLA_Diag diagA, FLA_Obj alpha, FLA_Obj A, FLA_Obj B, fla_trsm_t *cntl)

Function Documentation

FLA_Error FLA_Trsm_lun_blk_var1 ( FLA_Diag  diagA,
FLA_Obj  alpha,
FLA_Obj  A,
FLA_Obj  B,
fla_trsm_t cntl 
)

References FLA_Cont_with_3x1_to_2x1(), FLA_Cont_with_3x3_to_2x2(), FLA_Determine_blocksize(), FLA_Gemm_internal(), FLA_MINUS_ONE, FLA_Obj_length(), FLA_ONE, FLA_Part_2x1(), FLA_Part_2x2(), FLA_Repart_2x1_to_3x1(), FLA_Repart_2x2_to_3x3(), and FLA_Trsm_internal().

Referenced by FLA_Trsm_lun().

00038 {
00039   FLA_Obj ATL,   ATR,      A00, A01, A02, 
00040           ABL,   ABR,      A10, A11, A12,
00041                            A20, A21, A22;
00042 
00043   FLA_Obj BT,              B0,
00044           BB,              B1,
00045                            B2;
00046 
00047   dim_t b;
00048 
00049   FLA_Part_2x2( A,    &ATL, &ATR,
00050                       &ABL, &ABR,     0, 0, FLA_BR );
00051 
00052   FLA_Part_2x1( B,    &BT, 
00053                       &BB,            0, FLA_BOTTOM );
00054 
00055   while ( FLA_Obj_length( ABR ) < FLA_Obj_length( A ) ){
00056 
00057     b = FLA_Determine_blocksize( ATL, FLA_TL, FLA_Cntl_blocksize( cntl ) );
00058 
00059     FLA_Repart_2x2_to_3x3( ATL, /**/ ATR,       &A00, &A01, /**/ &A02,
00060                                                 &A10, &A11, /**/ &A12,
00061                         /* ************* */   /* ******************** */
00062                            ABL, /**/ ABR,       &A20, &A21, /**/ &A22,
00063                            b, b, FLA_TL );
00064 
00065     FLA_Repart_2x1_to_3x1( BT,                &B0, 
00066                                               &B1, 
00067                         /* ** */            /* ** */
00068                            BB,                &B2,        b, FLA_TOP );
00069 
00070     /*------------------------------------------------------------*/
00071 
00072     /* B1 = B1 - A12 * B2; */
00073     FLA_Gemm_internal( FLA_NO_TRANSPOSE, FLA_NO_TRANSPOSE, 
00074                        FLA_MINUS_ONE, A12, B2, FLA_ONE, B1,
00075                        FLA_Cntl_sub_gemm( cntl ) );
00076 
00077     /* B1 = triu( A11 ) \ B1; */
00078     FLA_Trsm_internal( FLA_LEFT, FLA_UPPER_TRIANGULAR, FLA_NO_TRANSPOSE, diagA,
00079                        alpha, A11, B1,
00080                        FLA_Cntl_sub_trsm( cntl ) );
00081 
00082     /*------------------------------------------------------------*/
00083 
00084     FLA_Cont_with_3x3_to_2x2( &ATL, /**/ &ATR,       A00, /**/ A01, A02,
00085                             /* ************** */  /* ****************** */
00086                                                      A10, /**/ A11, A12,
00087                               &ABL, /**/ &ABR,       A20, /**/ A21, A22,
00088                               FLA_BR );
00089 
00090     FLA_Cont_with_3x1_to_2x1( &BT,                B0, 
00091                             /* ** */           /* ** */
00092                                                   B1, 
00093                               &BB,                B2,     FLA_BOTTOM );
00094 
00095   }
00096 
00097   return FLA_SUCCESS;
00098 }


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