FLA_Syr2k_ln_blk_var2.c File Reference

(r)


Functions

FLA_Error FLA_Syr2k_ln_blk_var2 (FLA_Obj alpha, FLA_Obj A, FLA_Obj B, FLA_Obj beta, FLA_Obj C, fla_syr2k_t *cntl)

Function Documentation

FLA_Error FLA_Syr2k_ln_blk_var2 ( FLA_Obj  alpha,
FLA_Obj  A,
FLA_Obj  B,
FLA_Obj  beta,
FLA_Obj  C,
fla_syr2k_t cntl 
)

References FLA_Cont_with_3x1_to_2x1(), FLA_Cont_with_3x3_to_2x2(), FLA_Determine_blocksize(), FLA_Gemm_internal(), FLA_Obj_length(), FLA_ONE, FLA_Part_2x1(), FLA_Part_2x2(), FLA_Repart_2x1_to_3x1(), FLA_Repart_2x2_to_3x3(), and FLA_Syr2k_internal().

Referenced by FLA_Syr2k_ln().

00038 {
00039   FLA_Obj AT,              A0,
00040           AB,              A1,
00041                            A2;
00042 
00043   FLA_Obj BT,              B0,
00044           BB,              B1,
00045                            B2;
00046 
00047   FLA_Obj CTL,   CTR,      C00, C01, C02, 
00048           CBL,   CBR,      C10, C11, C12,
00049                            C20, C21, C22;
00050 
00051   dim_t b;
00052 
00053   FLA_Part_2x1( A,    &AT, 
00054                       &AB,            0, FLA_TOP );
00055 
00056   FLA_Part_2x1( B,    &BT, 
00057                       &BB,            0, FLA_TOP );
00058 
00059   FLA_Part_2x2( C,    &CTL, &CTR,
00060                       &CBL, &CBR,     0, 0, FLA_TL );
00061 
00062   while ( FLA_Obj_length( AT ) < FLA_Obj_length( A ) ){
00063 
00064     b = FLA_Determine_blocksize( AB, FLA_BOTTOM, FLA_Cntl_blocksize( cntl ) );
00065 
00066     FLA_Repart_2x1_to_3x1( AT,                &A0, 
00067                         /* ** */            /* ** */
00068                                               &A1, 
00069                            AB,                &A2,        b, FLA_BOTTOM );
00070 
00071     FLA_Repart_2x1_to_3x1( BT,                &B0, 
00072                         /* ** */            /* ** */
00073                                               &B1, 
00074                            BB,                &B2,        b, FLA_BOTTOM );
00075 
00076     FLA_Repart_2x2_to_3x3( CTL, /**/ CTR,       &C00, /**/ &C01, &C02,
00077                         /* ************* */   /* ******************** */
00078                                                 &C10, /**/ &C11, &C12,
00079                            CBL, /**/ CBR,       &C20, /**/ &C21, &C22,
00080                            b, b, FLA_BR );
00081 
00082     /*------------------------------------------------------------*/
00083 
00084     /* C10 = C10 + B1 * A0' */
00085     FLA_Gemm_internal( FLA_NO_TRANSPOSE, FLA_TRANSPOSE, 
00086                        alpha, B1, A0, beta, C10,
00087                        FLA_Cntl_sub_gemm1( cntl ) );
00088 
00089     /* C21 = C21 + A2 * B1' */
00090     FLA_Gemm_internal( FLA_NO_TRANSPOSE, FLA_TRANSPOSE, 
00091                        alpha, A2, B1, FLA_ONE, C21,
00092                        FLA_Cntl_sub_gemm2( cntl ) );
00093 
00094     /* C11 = C11 + A1 * B1' + B1 * A1' */
00095     FLA_Syr2k_internal( FLA_LOWER_TRIANGULAR, FLA_NO_TRANSPOSE, 
00096                         alpha, A1, B1, beta, C11,
00097                         FLA_Cntl_sub_syr2k( cntl ) );
00098 
00099     /*------------------------------------------------------------*/
00100 
00101     FLA_Cont_with_3x1_to_2x1( &AT,                A0, 
00102                                                   A1, 
00103                             /* ** */           /* ** */
00104                               &AB,                A2,     FLA_TOP );
00105 
00106     FLA_Cont_with_3x1_to_2x1( &BT,                B0, 
00107                                                   B1, 
00108                             /* ** */           /* ** */
00109                               &BB,                B2,     FLA_TOP );
00110 
00111     FLA_Cont_with_3x3_to_2x2( &CTL, /**/ &CTR,       C00, C01, /**/ C02,
00112                                                      C10, C11, /**/ C12,
00113                             /* ************** */  /* ****************** */
00114                               &CBL, /**/ &CBR,       C20, C21, /**/ C22,
00115                               FLA_TL );
00116 
00117   }
00118 
00119   return FLA_SUCCESS;
00120 }


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