FLA_Gemv_t_blk_var2.c File Reference

(r)


Functions

FLA_Error FLA_Gemv_t_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_t_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_1x3_to_1x2(), FLA_Cont_with_3x1_to_2x1(), FLA_Determine_blocksize(), FLA_Gemv_internal(), FLA_Obj_width(), FLA_Part_1x2(), FLA_Part_2x1(), FLA_Repart_1x2_to_1x3(), and FLA_Repart_2x1_to_3x1().

Referenced by FLA_Gemv_t().

00038 {
00039   FLA_Obj AL,    AR,       A0,  A1,  A2;
00040 
00041   FLA_Obj yT,              y0,
00042           yB,              y1,
00043                            y2;
00044 
00045   dim_t b;
00046 
00047   FLA_Part_1x2( A,    &AL,  &AR,      0, FLA_RIGHT );
00048 
00049   FLA_Part_2x1( y,    &yT, 
00050                       &yB,            0, FLA_BOTTOM );
00051 
00052   while ( FLA_Obj_width( AR ) < FLA_Obj_width( A ) ){
00053 
00054     b = FLA_Determine_blocksize( AL, FLA_LEFT, FLA_Cntl_blocksize( cntl ) );
00055 
00056     FLA_Repart_1x2_to_1x3( AL,  /**/ AR,        &A0, &A1, /**/ &A2,
00057                            b, FLA_LEFT );
00058 
00059     FLA_Repart_2x1_to_3x1( yT,                &y0, 
00060                                               &y1, 
00061                         /* ** */            /* ** */
00062                            yB,                &y2,        b, FLA_TOP );
00063 
00064     /*------------------------------------------------------------*/
00065 
00066     /* y1 = alpha * A1' * x + y1 */
00067     FLA_Gemv_internal( FLA_TRANSPOSE, 
00068                        alpha, A1, x, beta, y1,
00069                        FLA_Cntl_sub_gemv( cntl ) );
00070 
00071     /*------------------------------------------------------------*/
00072 
00073     FLA_Cont_with_1x3_to_1x2( &AL,  /**/ &AR,        A0, /**/ A1, A2,
00074                               FLA_RIGHT );
00075 
00076     FLA_Cont_with_3x1_to_2x1( &yT,                y0, 
00077                             /* ** */           /* ** */
00078                                                   y1, 
00079                               &yB,                y2,     FLA_BOTTOM );
00080 
00081   }
00082 
00083   return FLA_SUCCESS;
00084 }


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