FLA_Syrk_un_unb_var2.c File Reference

(r)


Functions

FLA_Error FLA_Syrk_un_unb_var2 (FLA_Obj alpha, FLA_Obj A, FLA_Obj beta, FLA_Obj C)

Function Documentation

FLA_Error FLA_Syrk_un_unb_var2 ( FLA_Obj  alpha,
FLA_Obj  A,
FLA_Obj  beta,
FLA_Obj  C 
)

References FLA_Cont_with_3x1_to_2x1(), FLA_Cont_with_3x3_to_2x2(), FLA_Dots_external(), FLA_Gemv_external(), FLA_Obj_length(), FLA_ONE, FLA_Part_2x1(), FLA_Part_2x2(), FLA_Repart_2x1_to_3x1(), FLA_Repart_2x2_to_3x3(), and FLA_Scalr_external().

00038 {
00039   FLA_Obj AT,              A0,
00040           AB,              a1t,
00041                            A2;
00042 
00043   FLA_Obj CTL,   CTR,      C00,  c01,     C02, 
00044           CBL,   CBR,      c10t, gamma11, c12t,
00045                            C20,  c21,     C22;
00046 
00047   FLA_Scalr_external( FLA_UPPER_TRIANGULAR, beta, C );
00048 
00049   FLA_Part_2x1( A,    &AT, 
00050                       &AB,            0, FLA_TOP );
00051 
00052   FLA_Part_2x2( C,    &CTL, &CTR,
00053                       &CBL, &CBR,     0, 0, FLA_TL );
00054 
00055   while ( FLA_Obj_length( AT ) < FLA_Obj_length( A ) ){
00056 
00057     FLA_Repart_2x1_to_3x1( AT,                &A0, 
00058                         /* ** */            /* *** */
00059                                               &a1t, 
00060                            AB,                &A2,        1, FLA_BOTTOM );
00061 
00062     FLA_Repart_2x2_to_3x3( CTL, /**/ CTR,       &C00,  /**/ &c01,     &C02,
00063                         /* ************* */   /* ************************** */
00064                                                 &c10t, /**/ &gamma11, &c12t,
00065                            CBL, /**/ CBR,       &C20,  /**/ &c21,     &C22,
00066                            1, 1, FLA_BR );
00067 
00068     /*------------------------------------------------------------*/
00069 
00070     /* c01     = c01     + A0  * a1t' */
00071     FLA_Gemv_external( FLA_NO_TRANSPOSE, alpha, A0, a1t, FLA_ONE, c01 );
00072 
00073     /* gamma11 = gamma11 + a1t * a1t' */
00074     FLA_Dots_external( alpha, a1t, a1t, FLA_ONE, gamma11 );
00075 
00076     /*------------------------------------------------------------*/
00077 
00078     FLA_Cont_with_3x1_to_2x1( &AT,                A0, 
00079                                                   a1t, 
00080                             /* ** */           /* *** */
00081                               &AB,                A2,     FLA_TOP );
00082 
00083     FLA_Cont_with_3x3_to_2x2( &CTL, /**/ &CTR,       C00,  c01,     /**/ C02,
00084                                                      c10t, gamma11, /**/ c12t,
00085                             /* ************** */  /* ************************ */
00086                               &CBL, /**/ &CBR,       C20,  c21,     /**/ C22,
00087                               FLA_TL );
00088 
00089   }
00090 
00091   return FLA_SUCCESS;
00092 }


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