FLA_Syrk_lt_unb_var6.c File Reference

(r)


Functions

FLA_Error FLA_Syrk_lt_unb_var6 (FLA_Obj alpha, FLA_Obj A, FLA_Obj beta, FLA_Obj C)

Function Documentation

FLA_Error FLA_Syrk_lt_unb_var6 ( FLA_Obj  alpha,
FLA_Obj  A,
FLA_Obj  beta,
FLA_Obj  C 
)

References FLA_Cont_with_3x1_to_2x1(), FLA_Obj_length(), FLA_Part_2x1(), FLA_Repart_2x1_to_3x1(), FLA_Scalr_external(), and FLA_Syr_external().

00038 {
00039   FLA_Obj AT,              A0,
00040           AB,              a1t,
00041                            A2;
00042 
00043   FLA_Scalr_external( FLA_LOWER_TRIANGULAR, beta, C );
00044 
00045   FLA_Part_2x1( A,    &AT, 
00046                       &AB,            0, FLA_BOTTOM );
00047 
00048   while ( FLA_Obj_length( AB ) < FLA_Obj_length( A ) ){
00049 
00050     FLA_Repart_2x1_to_3x1( AT,                &A0, 
00051                                               &a1t, 
00052                         /* ** */            /* *** */
00053                            AB,                &A2,        1, FLA_TOP );
00054 
00055     /*------------------------------------------------------------*/
00056 
00057     /* C := C + a1t' * a1t */
00058     FLA_Syr_external( FLA_LOWER_TRIANGULAR, alpha, a1t, C );
00059 
00060     /*------------------------------------------------------------*/
00061 
00062     FLA_Cont_with_3x1_to_2x1( &AT,                A0, 
00063                             /* ** */           /* *** */
00064                                                   a1t, 
00065                               &AB,                A2,     FLA_BOTTOM );
00066 
00067   }
00068 
00069   return FLA_SUCCESS;
00070 }


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