FLA_Trsm_rlt_unb_var1.c File Reference

(r)

Functions
FLA_Error	FLA_Trsm_rlt_unb_var1 (FLA_Diag diagA, FLA_Obj alpha, FLA_Obj A, FLA_Obj B)

Function Documentation

FLA_Trsm_rlt_unb_var1()

FLA_Error FLA_Trsm_rlt_unb_var1	(	FLA_Diag	diagA,
		FLA_Obj	alpha,
		FLA_Obj	A,
		FLA_Obj	B )

{
  FLA_Obj ATL,   ATR,      A00,  a01,     A02, 
          ABL,   ABR,      a10t, alpha11, a12t,
                           A20,  a21,     A22;
 
  FLA_Obj BL,    BR,       B0,  b1,  B2;
 
  FLA_Scal_external( alpha, B );
 
  FLA_Part_2x2( A,    &ATL, &ATR,
                      &ABL, &ABR,     0, 0, FLA_TL );
 
  FLA_Part_1x2( B,    &BL,  &BR,      0, FLA_LEFT );
 
  while ( FLA_Obj_length( ATL ) < FLA_Obj_length( A ) ){
 
    FLA_Repart_2x2_to_3x3( ATL, /**/ ATR,       &A00,  /**/ &a01,     &A02,
                        /* ************* */   /* ************************** */
                                                &a10t, /**/ &alpha11, &a12t,
                           ABL, /**/ ABR,       &A20,  /**/ &a21,     &A22,
                           1, 1, FLA_BR );
 
    FLA_Repart_1x2_to_1x3( BL,  /**/ BR,        &B0, /**/ &b1, &B2,
                           1, FLA_RIGHT );
 
    /*------------------------------------------------------------*/
 
    /* b1 = b1 - B0 * a10t'; */
    FLA_Gemv_external( FLA_NO_TRANSPOSE, FLA_MINUS_ONE, B0, a10t, FLA_ONE, b1 );
 
    /* b1 = b1 / alpha11; */
    if ( diagA != FLA_UNIT_DIAG )
      FLA_Inv_scal_external( alpha11, b1 );
 
    /*------------------------------------------------------------*/
 
    FLA_Cont_with_3x3_to_2x2( &ATL, /**/ &ATR,       A00,  a01,     /**/ A02,
                                                     a10t, alpha11, /**/ a12t,
                            /* ************** */  /* ************************ */
                              &ABL, /**/ &ABR,       A20,  a21,     /**/ A22,
                              FLA_TL );
 
    FLA_Cont_with_1x3_to_1x2( &BL,  /**/ &BR,        B0, b1, /**/ B2,
                              FLA_LEFT );
 
  }
 
  return FLA_SUCCESS;
}

References FLA_Cont_with_1x3_to_1x2(), FLA_Cont_with_3x3_to_2x2(), FLA_Gemv_external(), FLA_Inv_scal_external(), FLA_MINUS_ONE, FLA_Obj_length(), FLA_ONE, FLA_Part_1x2(), FLA_Part_2x2(), FLA_Repart_1x2_to_1x3(), FLA_Repart_2x2_to_3x3(), and FLA_Scal_external().

Referenced by FLA_Trsm_rlt().