FLA_Syrk_lt_unb_var3.c File Reference

(r)


Functions

FLA_Error FLA_Syrk_lt_unb_var3 (FLA_Obj alpha, FLA_Obj A, FLA_Obj beta, FLA_Obj C)

Function Documentation

FLA_Error FLA_Syrk_lt_unb_var3 ( FLA_Obj  alpha,
FLA_Obj  A,
FLA_Obj  beta,
FLA_Obj  C 
)

References FLA_Cont_with_1x3_to_1x2(), FLA_Cont_with_3x3_to_2x2(), FLA_Dots_external(), FLA_Gemv_external(), FLA_Obj_width(), FLA_ONE, FLA_Part_1x2(), FLA_Part_2x2(), FLA_Repart_1x2_to_1x3(), FLA_Repart_2x2_to_3x3(), and FLA_Scalr_external().

00038 {
00039   FLA_Obj AL,    AR,       A0,  a1,  A2;
00040 
00041   FLA_Obj CTL,   CTR,      C00,  c01,     C02, 
00042           CBL,   CBR,      c10t, gamma11, c12t,
00043                            C20,  c21,     C22;
00044 
00045   FLA_Scalr_external( FLA_LOWER_TRIANGULAR, beta, C );
00046 
00047   FLA_Part_1x2( A,    &AL,  &AR,      0, FLA_RIGHT );
00048 
00049   FLA_Part_2x2( C,    &CTL, &CTR,
00050                       &CBL, &CBR,     0, 0, FLA_BR );
00051 
00052   while ( FLA_Obj_width( AR ) < FLA_Obj_width( A ) ){
00053 
00054     FLA_Repart_1x2_to_1x3( AL,  /**/ AR,        &A0, &a1, /**/ &A2,
00055                            1, FLA_LEFT );
00056 
00057     FLA_Repart_2x2_to_3x3( CTL, /**/ CTR,       &C00,  &c01,     /**/ &C02,
00058                                                 &c10t, &gamma11, /**/ &c12t,
00059                         /* ************* */   /* ************************** */
00060                            CBL, /**/ CBR,       &C20,  &c21,     /**/ &C22,
00061                            1, 1, FLA_TL );
00062 
00063     /*------------------------------------------------------------*/
00064 
00065     /* c21     = c21     + A2' * a1 */
00066     FLA_Gemv_external( FLA_TRANSPOSE, alpha, A2, a1, FLA_ONE, c21 );
00067 
00068     /* gamma11 = gamma11 + a1' * a1 */
00069     FLA_Dots_external( alpha, a1, a1, FLA_ONE, gamma11 );
00070 
00071     /*------------------------------------------------------------*/
00072 
00073     FLA_Cont_with_1x3_to_1x2( &AL,  /**/ &AR,        A0, /**/ a1, A2,
00074                               FLA_RIGHT );
00075 
00076     FLA_Cont_with_3x3_to_2x2( &CTL, /**/ &CTR,       C00,  /**/ c01,     C02,
00077                             /* ************** */  /* ************************ */
00078                                                      c10t, /**/ gamma11, c12t,
00079                               &CBL, /**/ &CBR,       C20,  /**/ c21,     C22,
00080                               FLA_BR );
00081 
00082   }
00083 
00084   return FLA_SUCCESS;
00085 }


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