FLA_Syr2k_un_unb_var3.c File Reference

(r)


Functions

FLA_Error FLA_Syr2k_un_unb_var3 (FLA_Obj alpha, FLA_Obj A, FLA_Obj B, FLA_Obj beta, FLA_Obj C)

Function Documentation

FLA_Error FLA_Syr2k_un_unb_var3 ( FLA_Obj  alpha,
FLA_Obj  A,
FLA_Obj  B,
FLA_Obj  beta,
FLA_Obj  C 
)

References FLA_Cont_with_3x1_to_2x1(), FLA_Cont_with_3x3_to_2x2(), FLA_Dot2s_external(), FLA_Gemv_external(), FLA_Obj_length(), FLA_ONE, FLA_Part_2x1(), FLA_Part_2x2(), FLA_Repart_2x1_to_3x1(), and FLA_Repart_2x2_to_3x3().

00036 {
00037   FLA_Obj AT,              A0,
00038           AB,              a1t,
00039                            A2;
00040 
00041   FLA_Obj BT,              B0,
00042           BB,              b1t,
00043                            B2;
00044 
00045   FLA_Obj CTL,   CTR,      C00,  c01,     C02, 
00046           CBL,   CBR,      c10t, gamma11, c12t,
00047                            C20,  c21,     C22;
00048 
00049 
00050   FLA_Part_2x1( A,    &AT, 
00051                       &AB,            0, FLA_TOP );
00052 
00053   FLA_Part_2x1( B,    &BT, 
00054                       &BB,            0, FLA_TOP );
00055 
00056   FLA_Part_2x2( C,    &CTL, &CTR,
00057                       &CBL, &CBR,     0, 0, FLA_TL );
00058 
00059   while ( FLA_Obj_length( AT ) < FLA_Obj_length( A ) ){
00060 
00061 
00062     FLA_Repart_2x1_to_3x1( AT,                &A0, 
00063                         /* ** */            /* ** */
00064                                               &a1t, 
00065                            AB,                &A2,        1, FLA_BOTTOM );
00066 
00067     FLA_Repart_2x1_to_3x1( BT,                &B0, 
00068                         /* ** */            /* ** */
00069                                               &b1t, 
00070                            BB,                &B2,        1, FLA_BOTTOM );
00071 
00072     FLA_Repart_2x2_to_3x3( CTL, /**/ CTR,       &C00,  /**/ &c01,     &C02,
00073                         /* ************* */   /* ************************** */
00074                                                 &c10t, /**/ &gamma11, &c12t,
00075                            CBL, /**/ CBR,       &C20,  /**/ &c21,     &C22,
00076                            1, 1, FLA_BR );
00077 
00078     /*------------------------------------------------------------*/
00079 
00080     /* c01 = c01 + A0 * b1t' */
00081     FLA_Gemv_external( FLA_NO_TRANSPOSE, alpha, A0, b1t, beta, c01 );    
00082 
00083     /* c12t = c12t + b1t * A2' */
00084     FLA_Gemv_external( FLA_NO_TRANSPOSE, alpha, A2, b1t, FLA_ONE, c12t );
00085 
00086     /* gamma11 = gamma11 + a1t * b1t' + b1t * a1t' */
00087     FLA_Dot2s_external( alpha, a1t, b1t, beta, gamma11 );
00088 
00089     /*------------------------------------------------------------*/
00090 
00091     FLA_Cont_with_3x1_to_2x1( &AT,                A0, 
00092                                                   a1t, 
00093                             /* ** */           /* ** */
00094                               &AB,                A2,     FLA_TOP );
00095 
00096     FLA_Cont_with_3x1_to_2x1( &BT,                B0, 
00097                                                   b1t, 
00098                             /* ** */           /* ** */
00099                               &BB,                B2,     FLA_TOP );
00100 
00101     FLA_Cont_with_3x3_to_2x2( &CTL, /**/ &CTR,       C00,  c01,     /**/ C02,
00102                                                      c10t, gamma11, /**/ c12t,
00103                             /* ************** */  /* ************************ */
00104                               &CBL, /**/ &CBR,       C20,  c21,     /**/ C22,
00105                               FLA_TL );
00106 
00107   }
00108 
00109   return FLA_SUCCESS;
00110 }


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