FLA_Sylv_nt_blk_var16.c File Reference

(r)


Functions

FLA_Error FLA_Sylv_nt_blk_var16 (FLA_Obj isgn, FLA_Obj A, FLA_Obj B, FLA_Obj C, FLA_Obj scale, fla_sylv_t *cntl)

Function Documentation

FLA_Error FLA_Sylv_nt_blk_var16 ( FLA_Obj  isgn,
FLA_Obj  A,
FLA_Obj  B,
FLA_Obj  C,
FLA_Obj  scale,
fla_sylv_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_Sylv_internal().

Referenced by FLA_Sylv_nt().

00038 {
00039   FLA_Obj ATL,   ATR,      A00, A01, A02, 
00040           ABL,   ABR,      A10, A11, A12,
00041                            A20, A21, A22;
00042 
00043   FLA_Obj CT,              C0,
00044           CB,              C1,
00045                            C2;
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( C,    &CT, 
00053                       &CB,            0, FLA_BOTTOM );
00054 
00055   while ( FLA_Obj_length( ABR ) < FLA_Obj_length( A ) ){
00056 
00057     b = FLA_Determine_blocksize( CT, FLA_TOP, 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( CT,                &C0, 
00066                                               &C1, 
00067                         /* ** */            /* ** */
00068                            CB,                &C2,        b, FLA_TOP );
00069 
00070     // Loop Invariant:
00071     // CT = CT - ATR * sylv( ABR, B', CB )
00072     // CB = sylv( ABR, B', CB )
00073 
00074     /*------------------------------------------------------------*/
00075 
00076     // C1 = sylv( A11, B', C1 );
00077     FLA_Sylv_internal( FLA_NO_TRANSPOSE, FLA_TRANSPOSE, 
00078                        isgn, A11, B, C1, scale,
00079                        FLA_Cntl_sub_sylv1( cntl ) );
00080 
00081     // C0 = C0 - A01 * C1;
00082     FLA_Gemm_internal( FLA_NO_TRANSPOSE, FLA_NO_TRANSPOSE,
00083                        FLA_MINUS_ONE, A01, C1, FLA_ONE, C0,
00084                        FLA_Cntl_sub_gemm1( cntl ) );
00085 
00086     /*------------------------------------------------------------*/
00087 
00088     FLA_Cont_with_3x3_to_2x2( &ATL, /**/ &ATR,       A00, /**/ A01, A02,
00089                             /* ************** */  /* ****************** */
00090                                                      A10, /**/ A11, A12,
00091                               &ABL, /**/ &ABR,       A20, /**/ A21, A22,
00092                               FLA_BR );
00093 
00094     FLA_Cont_with_3x1_to_2x1( &CT,                C0, 
00095                             /* ** */           /* ** */
00096                                                   C1, 
00097                               &CB,                C2,     FLA_BOTTOM );
00098 
00099   }
00100 
00101   return FLA_SUCCESS;
00102 }


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