FLA_Gemv_n_blk_var2.c File Reference

(r)


Functions

FLA_Error FLA_Gemv_n_blk_var2 (FLA_Obj alpha, FLA_Obj A, FLA_Obj x, FLA_Obj beta, FLA_Obj y, fla_gemv_t *cntl)

Function Documentation

FLA_Error FLA_Gemv_n_blk_var2 ( FLA_Obj  alpha,
FLA_Obj  A,
FLA_Obj  x,
FLA_Obj  beta,
FLA_Obj  y,
fla_gemv_t cntl 
)

References FLA_Cont_with_3x1_to_2x1(), FLA_Determine_blocksize(), FLA_Gemv_internal(), FLA_Obj_length(), FLA_Part_2x1(), and FLA_Repart_2x1_to_3x1().

Referenced by FLA_Gemv_n().

00038 {
00039   FLA_Obj AT,              A0,
00040           AB,              A1,
00041                            A2;
00042 
00043   FLA_Obj yT,              y0,
00044           yB,              y1,
00045                            y2;
00046 
00047   dim_t b;
00048 
00049   FLA_Part_2x1( A,    &AT, 
00050                       &AB,            0, FLA_BOTTOM );
00051 
00052   FLA_Part_2x1( y,    &yT, 
00053                       &yB,            0, FLA_BOTTOM );
00054 
00055   while ( FLA_Obj_length( AB ) < FLA_Obj_length( A ) ){
00056 
00057     b = FLA_Determine_blocksize( AT, FLA_TOP, FLA_Cntl_blocksize( cntl ) );
00058 
00059     FLA_Repart_2x1_to_3x1( AT,                &A0, 
00060                                               &A1, 
00061                         /* ** */            /* ** */
00062                            AB,                &A2,        b, FLA_TOP );
00063 
00064     FLA_Repart_2x1_to_3x1( yT,                &y0, 
00065                                               &y1, 
00066                         /* ** */            /* ** */
00067                            yB,                &y2,        b, FLA_TOP );
00068 
00069     /*------------------------------------------------------------*/
00070 
00071     /*   y1 = alpha * A1 * x + y1;   */
00072     FLA_Gemv_internal( FLA_NO_TRANSPOSE, 
00073                        alpha, A1, x, beta, y1, 
00074                        FLA_Cntl_sub_gemv( cntl ) );
00075 
00076     /*------------------------------------------------------------*/
00077 
00078     FLA_Cont_with_3x1_to_2x1( &AT,                A0, 
00079                             /* ** */           /* ** */
00080                                                   A1, 
00081                               &AB,                A2,     FLA_BOTTOM );
00082 
00083     FLA_Cont_with_3x1_to_2x1( &yT,                y0, 
00084                             /* ** */           /* ** */
00085                                                   y1, 
00086                               &yB,                y2,     FLA_BOTTOM );
00087 
00088   }
00089 
00090   return FLA_SUCCESS;
00091 }


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