FLA_Apply_Q_UT_inc_lhfc_blk_var1.c File Reference

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Functions
FLA_Error	FLA_Apply_Q_UT_inc_lhfc_blk_var1 (FLA_Obj A, FLA_Obj TW, FLA_Obj W1, FLA_Obj B, fla_apqutinc_t *cntl)

---

Function Documentation

FLA_Error FLA_Apply_Q_UT_inc_lhfc_blk_var1	(	FLA_Obj	A,
		FLA_Obj	TW,
		FLA_Obj	W1,
		FLA_Obj	B,
		fla_apqutinc_t *	cntl
	)

References FLA_Apply_Q2_UT_internal(), FLA_Apply_Q_UT_internal(), FLA_Cont_with_3x1_to_2x1(), FLA_Cont_with_3x3_to_2x2(), FLA_Determine_blocksize(), FLA_Obj_min_dim(), FLA_Part_2x1(), FLA_Part_2x2(), FLA_Repart_2x1_to_3x1(), and FLA_Repart_2x2_to_3x3().

Referenced by FLA_Apply_Q_UT_inc_lhfc().

{
  FLA_Obj ATL,   ATR,      A00, A01, A02, 
          ABL,   ABR,      A10, A11, A12,
                           A20, A21, A22;

  FLA_Obj TTL,   WTR,      T00, W01, W02, 
          TBL,   TBR,      T10, T11, W12,
                           T20, T21, T22;

  FLA_Obj BT,              B0,
          BB,              B1,
                           B2;

  dim_t   b;

  FLA_Part_2x2( A,    &ATL, &ATR,
                      &ABL, &ABR,     0, 0, FLA_TL );

  FLA_Part_2x2( TW,   &TTL, &WTR,
                      &TBL, &TBR,     0, 0, FLA_TL );

  FLA_Part_2x1( B,    &BT,
                      &BB,            0, FLA_TOP );

  while ( FLA_Obj_min_dim( ABR ) > 0 ){

    b = FLA_Determine_blocksize( ABR, FLA_BR, FLA_Cntl_blocksize( cntl ) );

    FLA_Repart_2x2_to_3x3( ATL, /**/ ATR,       &A00, /**/ &A01, &A02,
                        /* ************* */   /* ******************** */
                                                &A10, /**/ &A11, &A12,
                           ABL, /**/ ABR,       &A20, /**/ &A21, &A22,
                           b, b, FLA_BR );

    FLA_Repart_2x2_to_3x3( TTL, /**/ WTR,       &T00, /**/ &W01, &W02,
                        /* ************* */   /* ******************** */
                                                &T10, /**/ &T11, &W12,
                           TBL, /**/ TBR,       &T20, /**/ &T21, &T22,
                           b, b, FLA_BR );

    FLA_Repart_2x1_to_3x1( BT,                &B0,
                        /* ** */            /* ** */
                                              &B1,
                           BB,                &B2,        b, FLA_BOTTOM );

    /*------------------------------------------------------------*/

    /*
        Apply Q^H to B1 from the left:
      
          B1 = Q^H * B1
      
        where Q is formed from A11 and T11. Note that W1 refers
        to a row-panel of blocks where each block refers to an
        nb_alg-by-b row-panel of workspace.
    */

    FLA_Apply_Q_UT_internal( FLA_LEFT, FLA_CONJ_TRANSPOSE, FLA_FORWARD, FLA_COLUMNWISE,
                             A11, T11, W1, B1,
                             FLA_Cntl_sub_apqut( cntl ) );

    /*
        Apply Q^H to B1 and B2 from the left:
      
            / B1 \ = Q^H * / B1 \
            \ B2 /         \ B2 / 
      
        where Q is formed from A21 and T21.
    */

    FLA_Apply_Q2_UT_internal( FLA_LEFT, FLA_CONJ_TRANSPOSE, FLA_FORWARD, FLA_COLUMNWISE,
                              A21, T21, W1, B1,
                                            B2,
                              FLA_Cntl_sub_apq2ut( cntl ) );

    /*------------------------------------------------------------*/

    FLA_Cont_with_3x3_to_2x2( &ATL, /**/ &ATR,       A00, A01, /**/ A02,
                                                     A10, A11, /**/ A12,
                            /* ************** */  /* ****************** */
                              &ABL, /**/ &ABR,       A20, A21, /**/ A22,
                              FLA_TL );

    FLA_Cont_with_3x3_to_2x2( &TTL, /**/ &WTR,       T00, W01, /**/ W02,
                                                     T10, T11, /**/ W12,
                            /* ************** */  /* ****************** */
                              &TBL, /**/ &TBR,       T20, T21, /**/ T22,
                              FLA_TL );

    FLA_Cont_with_3x1_to_2x1( &BT,                B0,
                                                  B1,
                            /* ** */           /* ** */
                              &BB,                B2,     FLA_TOP );

  }

  return FLA_SUCCESS;
}