mod_compute_hh_trafo_real.F90 52.1 KB
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!    This file is part of ELPA.
!
!    The ELPA library was originally created by the ELPA consortium,
!    consisting of the following organizations:
!
!    - Rechenzentrum Garching der Max-Planck-Gesellschaft (RZG),
!    - Bergische Universität Wuppertal, Lehrstuhl für angewandte
!      Informatik,
!    - Technische Universität München, Lehrstuhl für Informatik mit
!      Schwerpunkt Wissenschaftliches Rechnen ,
!    - Fritz-Haber-Institut, Berlin, Abt. Theorie,
!    - Max-Plack-Institut für Mathematik in den Naturwissenschaftrn,
!      Leipzig, Abt. Komplexe Strukutren in Biologie und Kognition,
!      and
!    - IBM Deutschland GmbH
!
!
!    More information can be found here:
!    http://elpa.rzg.mpg.de/
!
!    ELPA is free software: you can redistribute it and/or modify
!    it under the terms of the version 3 of the license of the
!    GNU Lesser General Public License as published by the Free
!    Software Foundation.
!
!    ELPA is distributed in the hope that it will be useful,
!    but WITHOUT ANY WARRANTY; without even the implied warranty of
!    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
!    GNU Lesser General Public License for more details.
!
!    You should have received a copy of the GNU Lesser General Public License
!    along with ELPA.  If not, see <http://www.gnu.org/licenses/>
!
!    ELPA reflects a substantial effort on the part of the original
!    ELPA consortium, and we ask you to respect the spirit of the
!    license that we chose: i.e., please contribute any changes you
!    may have back to the original ELPA library distribution, and keep
!    any derivatives of ELPA under the same license that we chose for
!    the original distribution, the GNU Lesser General Public License.
!
! This file was written by A. Marek, MPCDF



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module compute_hh_trafo_real
#include "config-f90.h"
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  use elpa_mpi
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  implicit none

#ifdef WITH_OPENMP
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  public compute_hh_trafo_real_cpu_openmp_double
#else
  public compute_hh_trafo_real_cpu_double
#endif

#ifdef WANT_SINGLE_PRECISION_REAL
#ifdef WITH_OPENMP
  public compute_hh_trafo_real_cpu_openmp_single
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#else
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  public compute_hh_trafo_real_cpu_single
#endif


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#endif

  contains

#ifdef WITH_OPENMP
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       subroutine compute_hh_trafo_real_cpu_openmp_double(a, a_dev, stripe_width, a_dim2, stripe_count, max_threads, l_nev, &
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                                                   a_off, nbw, max_blk_size, bcast_buffer, bcast_buffer_dev, hh_dot_dev,    &
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                                                   hh_tau_dev, kernel_flops, kernel_time, off, ncols, istripe,              &
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                                                   my_thread, thread_width, THIS_REAL_ELPA_KERNEL)
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#else
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       subroutine compute_hh_trafo_real_cpu_double       (a, a_dev, stripe_width, a_dim2, stripe_count,                       &
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                                                   a_off, nbw, max_blk_size, bcast_buffer,  bcast_buffer_dev, hh_dot_dev,     &
                                                   hh_tau_dev, kernel_flops, kernel_time, off, ncols, istripe,                &
                                                   last_stripe_width, THIS_REAL_ELPA_KERNEL)
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#endif


         use precision
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         use iso_c_binding
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         use elpa2_utilities
         use single_hh_trafo_real
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         use cuda_c_kernel
         use cuda_functions

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#if defined(WITH_REAL_GENERIC_SIMPLE_KERNEL)
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         use real_generic_simple_kernel !, only : double_hh_trafo_generic_simple
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#endif

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#if defined(WITH_REAL_GENERIC_KERNEL) && !(defined(DESPERATELY_WANT_ASSUMED_SIZE))
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        use real_generic_kernel !, only : double_hh_trafo_generic
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#endif
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#if defined(WITH_REAL_BGP_KERNEL)
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         use real_bgp_kernel !, only : double_hh_trafo_bgp
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#endif

#if defined(WITH_REAL_BGQ_KERNEL)
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         use real_bgq_kernel !, only : double_hh_trafo_bgq
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#endif
#ifdef HAVE_DETAILED_TIMINGS
         use timings
#endif
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#if defined(HAVE_AVX) || defined(HAVE_SSE_INTRINSICS) || defined(HAVE_SSE_ASSEMBLY)
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         use kernel_interfaces
#endif
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         implicit none
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         real(kind=c_double), intent(inout) :: kernel_time  ! MPI_WTIME always needs double
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         integer(kind=lik)            :: kernel_flops
         integer(kind=ik), intent(in) :: nbw, max_blk_size
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         real(kind=rk8)                :: bcast_buffer(nbw,max_blk_size)
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         integer(kind=ik), intent(in) :: a_off

         integer(kind=ik), intent(in) :: stripe_width,a_dim2,stripe_count

#ifndef WITH_OPENMP
         integer(kind=ik), intent(in) :: last_stripe_width
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!         real(kind=rk8)                :: a(stripe_width,a_dim2,stripe_count)
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         real(kind=rk8), pointer      :: a(:,:,:)
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#else
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         integer(kind=ik), intent(in) :: max_threads, l_nev, thread_width
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!         real(kind=rk8)                :: a(stripe_width,a_dim2,stripe_count,max_threads)
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         real(kind=rk8), pointer      :: a(:,:,:,:)
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#endif
         integer(kind=ik), intent(in) :: THIS_REAL_ELPA_KERNEL

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         integer(kind=c_intptr_t)     :: a_dev
         integer(kind=c_intptr_t)     :: bcast_buffer_dev
         integer(kind=c_size_t)       :: dev_offset
         integer(kind=c_intptr_t)     :: hh_dot_dev
         integer(kind=c_intptr_t)     :: hh_tau_dev
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         ! Private variables in OMP regions (my_thread) should better be in the argument list!
         integer(kind=ik)             :: off, ncols, istripe
#ifdef WITH_OPENMP
         integer(kind=ik)             :: my_thread, noff
#endif
         integer(kind=ik)             :: j, nl, jj, jjj
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         real(kind=rk8)                :: w(nbw,6)
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         real(kind=c_double)          :: ttt ! MPI_WTIME always needs double
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         if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_GPU) then
           ! ncols - indicates the number of HH reflectors to apply; at least 1 must be available
           if (ncols < 1) return
         endif

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#ifdef HAVE_DETAILED_TIMINGS
#ifdef WITH_OPENMP
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         call timer%start("compute_hh_trafo_real_cpu_openmp_double")
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#else
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         call timer%start("compute_hh_trafo_real_cpu_double")
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#endif
#endif
         ttt = mpi_wtime()

#ifndef WITH_OPENMP
         nl = merge(stripe_width, last_stripe_width, istripe<stripe_count)
#else
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         if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_GPU) then
           print *,"compute_hh_trafo_real GPU OPENMP: not yet implemented"
           stop
         endif
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         if (istripe<stripe_count) then
           nl = stripe_width
         else
           noff = (my_thread-1)*thread_width + (istripe-1)*stripe_width
           nl = min(my_thread*thread_width-noff, l_nev-noff)
           if (nl<=0) then
#ifdef HAVE_DETAILED_TIMINGS
#ifdef WITH_OPENMP
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             call timer%stop("compute_hh_trafo_real_cpu_openmp_double")
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#else
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             call timer%stop("compute_hh_trafo_real_cpu_double")
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#endif
#endif
             return
           endif
         endif
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#endif /* not WITH_OPENMP */

         if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_GPU) then
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           dev_offset = (0 + (a_off * stripe_width) + ( (istripe - 1) * stripe_width *a_dim2 )) *size_of_double_real_datatype
           call launch_compute_hh_trafo_c_kernel_real_double(a_dev + dev_offset, bcast_buffer_dev, hh_dot_dev, &
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                                                      hh_tau_dev, nl, nbw, stripe_width, off, ncols)
         else ! not CUDA kernel
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#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
         if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_AVX_BLOCK2 .or. &
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             THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_AVX2_BLOCK2 .or. &
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             THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_SSE_BLOCK2 .or. &
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             THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_GENERIC    .or. &
             THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_GENERIC_SIMPLE .or. &
             THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_SSE .or.        &
             THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_BGP .or.        &
             THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_BGQ) then
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */

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             !FORTRAN CODE / X86 INRINISIC CODE / BG ASSEMBLER USING 2 HOUSEHOLDER VECTORS
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#if defined(WITH_REAL_GENERIC_KERNEL)
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
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             if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_GENERIC) then
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#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */

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               do j = ncols, 2, -2
                 w(:,1) = bcast_buffer(1:nbw,j+off)
                 w(:,2) = bcast_buffer(1:nbw,j+off-1)
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#ifdef WITH_OPENMP
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#ifdef DESPERATELY_WANT_ASSUMED_SIZE
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                 call double_hh_trafo_generic_double(a(1,j+off+a_off-1,istripe,my_thread), w, &
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                                            nbw, nl, stripe_width, nbw)

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#else
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                 call double_hh_trafo_generic_double(a(1:stripe_width,j+off+a_off-1:j+off+a_off+nbw-1, &
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                                              istripe,my_thread), w(1:nbw,1:6), &
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                                              nbw, nl, stripe_width, nbw)
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#endif

#else /* WITH_OPENMP */

#ifdef DESPERATELY_WANT_ASSUMED_SIZE
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                 call double_hh_trafo_generic_double(a(1,j+off+a_off-1,istripe),w, &
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                                            nbw, nl, stripe_width, nbw)

#else
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                 call double_hh_trafo_generic_double(a(1:stripe_width,j+off+a_off-1:j+off+a_off+nbw-1,istripe),w(1:nbw,1:6), &
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                                            nbw, nl, stripe_width, nbw)
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#endif
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#endif /* WITH_OPENMP */

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               enddo
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#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
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             endif
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#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
#endif /* WITH_REAL_GENERIC_KERNEL */


#if defined(WITH_REAL_GENERIC_SIMPLE_KERNEL)
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
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             if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_GENERIC_SIMPLE) then
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#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
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               do j = ncols, 2, -2
                 w(:,1) = bcast_buffer(1:nbw,j+off)
                 w(:,2) = bcast_buffer(1:nbw,j+off-1)
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#ifdef WITH_OPENMP
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#ifdef DESPERATELY_WANT_ASSUMED_SIZE
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                 call double_hh_trafo_generic_simple_double(a(1,j+off+a_off-1,istripe,my_thread), &
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                                                       w, nbw, nl, stripe_width, nbw)
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#else
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                 call double_hh_trafo_generic_simple_double(a(1:stripe_width,j+off+a_off-1:j+off+a_off-1+nbw,istripe,my_thread), &
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                                                     w, nbw, nl, stripe_width, nbw)

#endif

#else /* WITH_OPENMP */
#ifdef DESPERATELY_WANT_ASSUMED_SIZE
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                 call double_hh_trafo_generic_simple_double(a(1,j+off+a_off-1,istripe), &
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                                                       w, nbw, nl, stripe_width, nbw)
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#else
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                 call double_hh_trafo_generic_simple_double(a(1:stripe_width,j+off+a_off-1:j+off+a_off-1+nbw,istripe), &
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                                                     w, nbw, nl, stripe_width, nbw)

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#endif
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#endif /* WITH_OPENMP */

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               enddo
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#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
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             endif
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#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
#endif /* WITH_REAL_GENERIC_SIMPLE_KERNEL */


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#if defined(WITH_REAL_SSE_ASSEMBLY_KERNEL)
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#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
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             if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_SSE) then
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#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
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               do j = ncols, 2, -2
                 w(:,1) = bcast_buffer(1:nbw,j+off)
                 w(:,2) = bcast_buffer(1:nbw,j+off-1)
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#ifdef WITH_OPENMP
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                 call double_hh_trafo_double(a(1,j+off+a_off-1,istripe,my_thread), w, nbw, nl, &
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                                      stripe_width, nbw)
#else
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                 call double_hh_trafo_double(a(1,j+off+a_off-1,istripe), w, nbw, nl, &
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                                      stripe_width, nbw)
#endif
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               enddo
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#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
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             endif
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#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
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#endif /* WITH_REAL_SSE_ASSEMBLY_KERNEL */
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#if defined(WITH_REAL_SSE_BLOCK2_KERNEL)
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
           if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_SSE_BLOCK2) then
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
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#if defined(WITH_NO_SPECIFIC_REAL_KERNEL) || (defined(WITH_ONE_SPECIFIC_REAL_KERNEL) && !defined(WITH_REAL_SSE_BLOCK6_KERNEL) && !defined(WITH_REAL_SSE_BLOCK4_KERNEL))
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             do j = ncols, 2, -2
               w(:,1) = bcast_buffer(1:nbw,j+off)
               w(:,2) = bcast_buffer(1:nbw,j+off-1)
#ifdef WITH_OPENMP
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               call double_hh_trafo_real_sse_2hv_double(c_loc(a(1,j+off+a_off-1,istripe,my_thread)), &
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                                                       w, nbw, nl, stripe_width, nbw)
#else
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               call double_hh_trafo_real_sse_2hv_double(c_loc(a(1,j+off+a_off-1,istripe)), &
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                                                       w, nbw, nl, stripe_width, nbw)
#endif
             enddo
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#endif /* defined(WITH_NO_SPECIFIC_REAL_KERNEL) || (defined(WITH_ONE_SPECIFIC_REAL_KERNEL) && !defined(WITH_REAL_SSE_BLOCK6_KERNEL) && !defined(WITH_REAL_SSE_BLOCK4_KERNEL)) */

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#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
           endif
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
#endif /* WITH_REAL_SSE_BLOCK2_KERNEL */
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#if defined(WITH_REAL_AVX_BLOCK2_KERNEL) || defined(WITH_REAL_AVX2_BLOCK2_KERNEL)
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#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
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           if ((THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_AVX_BLOCK2) .or. &
               (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_AVX2_BLOCK2))  then
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#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
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#if defined(WITH_NO_SPECIFIC_REAL_KERNEL) || (defined(WITH_ONE_SPECIFIC_REAL_KERNEL) && !defined(WITH_REAL_AVX_BLOCK6_KERNEL) && !defined(WITH_REAL_AVX_BLOCK4_KERNEL) && !defined(WITH_REAL_AVX2_BLOCK6_KERNEL) && !defined(WITH_REAL_AVX2_BLOCK4_KERNEL))
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               do j = ncols, 2, -2
                 w(:,1) = bcast_buffer(1:nbw,j+off)
                 w(:,2) = bcast_buffer(1:nbw,j+off-1)
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#ifdef WITH_OPENMP
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               call double_hh_trafo_real_avx_avx2_2hv_double(c_loc(a(1,j+off+a_off-1,istripe,my_thread)), &
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                                                       w, nbw, nl, stripe_width, nbw)
#else
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               call double_hh_trafo_real_avx_avx2_2hv_double(c_loc(a(1,j+off+a_off-1,istripe)), &
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                                                       w, nbw, nl, stripe_width, nbw)
#endif
               enddo
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#endif /* defined(WITH_NO_SPECIFIC_REAL_KERNEL) || (defined(WITH_ONE_SPECIFIC_REAL_KERNEL) ... */

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#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
             endif
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
#endif /* WITH_REAL_AVX_BLOCK2_KERNEL */

#if defined(WITH_REAL_BGP_KERNEL)
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
             if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_BGP) then
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
               do j = ncols, 2, -2
                 w(:,1) = bcast_buffer(1:nbw,j+off)
                 w(:,2) = bcast_buffer(1:nbw,j+off-1)
#ifdef WITH_OPENMP
                 call double_hh_trafo_bgp_double(a(1,j+off+a_off-1,istripe,my_thread), w, nbw, nl, &
                                          stripe_width, nbw)
#else
                 call double_hh_trafo_bgp_double(a(1,j+off+a_off-1,istripe), w, nbw, nl, &
                                          stripe_width, nbw)
#endif
               enddo
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
             endif
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
#endif /* WITH_REAL_BGP_KERNEL */

#if defined(WITH_REAL_BGQ_KERNEL)
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
             if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_BGQ) then
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
               do j = ncols, 2, -2
                 w(:,1) = bcast_buffer(1:nbw,j+off)
                 w(:,2) = bcast_buffer(1:nbw,j+off-1)
#ifdef WITH_OPENMP
                 call double_hh_trafo_bgq_double(a(1,j+off+a_off-1,istripe,my_thread), w, nbw, nl, &
                                          stripe_width, nbw)
#else
                 call double_hh_trafo_bgq_double(a(1,j+off+a_off-1,istripe), w, nbw, nl, &
                                          stripe_width, nbw)
#endif
               enddo
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
             endif
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
#endif /* WITH_REAL_BGQ_KERNEL */


!#if defined(WITH_AVX_SANDYBRIDGE)
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!              call double_hh_trafo_real_avx_avx2_2hv(a(1,j+off+a_off-1,istripe), w, nbw, nl, stripe_width, nbw)
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!#endif

#ifdef WITH_OPENMP
             if (j==1) call single_hh_trafo_real_cpu_openmp_double(a(1:stripe_width, &
                                      1+off+a_off:1+off+a_off+nbw-1,istripe,my_thread), &
                                      bcast_buffer(1:nbw,off+1), nbw, nl,     &
                                      stripe_width)
#else
             if (j==1) call single_hh_trafo_real_cpu_double(a(1:stripe_width,1+off+a_off:1+off+a_off+nbw-1,istripe),           &
                                      bcast_buffer(1:nbw,off+1), nbw, nl,     &
                                      stripe_width)
#endif


#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
           endif !
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */

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#if defined(WITH_REAL_SSE_BLOCK4_KERNEL)
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
           if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_SSE_BLOCK4) then
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
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#if defined(WITH_NO_SPECIFIC_REAL_KERNEL) || (defined(WITH_ONE_SPECIFIC_REAL_KERNEL) && !defined(WITH_REAL_SSE_BLOCK6_KERNEL))
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             ! X86 INTRINSIC CODE, USING 4 HOUSEHOLDER VECTORS
             do j = ncols, 4, -4
               w(:,1) = bcast_buffer(1:nbw,j+off)
               w(:,2) = bcast_buffer(1:nbw,j+off-1)
               w(:,3) = bcast_buffer(1:nbw,j+off-2)
               w(:,4) = bcast_buffer(1:nbw,j+off-3)
#ifdef WITH_OPENMP
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               call quad_hh_trafo_real_sse_4hv_double(c_loc(a(1,j+off+a_off-3,istripe,my_thread)), w, &
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                                                  nbw, nl, stripe_width, nbw)
#else
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               call quad_hh_trafo_real_sse_4hv_double(c_loc(a(1,j+off+a_off-3,istripe)), w, &
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                                                  nbw, nl, stripe_width, nbw)
#endif
             enddo
             do jj = j, 2, -2
               w(:,1) = bcast_buffer(1:nbw,jj+off)
               w(:,2) = bcast_buffer(1:nbw,jj+off-1)
#ifdef WITH_OPENMP
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               call double_hh_trafo_real_sse_2hv_double(c_loc(a(1,jj+off+a_off-1,istripe,my_thread)), &
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                                                    w, nbw, nl, stripe_width, nbw)
#else
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               call double_hh_trafo_real_sse_2hv_double(c_loc(a(1,jj+off+a_off-1,istripe)), &
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                                                    w, nbw, nl, stripe_width, nbw)
#endif
             enddo
#ifdef WITH_OPENMP
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             if (jj==1) call single_hh_trafo_real_cpu_openmp_double(a(1:stripe_width,1+off+a_off:1+off+a_off+nbw-1, &
                                                                     istripe,my_thread), &
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                                          bcast_buffer(1:nbw,off+1), nbw, nl, stripe_width)
#else
             if (jj==1) call single_hh_trafo_real_cpu_double(a(1:stripe_width,1+off+a_off:1+off+a_off+nbw-1,istripe), &
                                          bcast_buffer(1:nbw,off+1), nbw, nl, stripe_width)
#endif
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#endif /* defined(WITH_NO_SPECIFIC_REAL_KERNEL) || (defined(WITH_ONE_SPECIFIC_REAL_KERNEL) && !defined(WITH_REAL_SSE_BLOCK6_KERNEL)) */

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#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
           endif
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
#endif /* WITH_REAL_SSE_BLOCK4_KERNEL */


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#if defined(WITH_REAL_AVX_BLOCK4_KERNEL)
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
           if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_AVX_BLOCK4) then
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
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#if defined(WITH_NO_SPECIFIC_REAL_KERNEL) || (defined(WITH_ONE_SPECIFIC_REAL_KERNEL) && !defined(WITH_REAL_AVX_BLOCK6_KERNEL) && !defined(WITH_REAL_AVX2_BLOCK6_KERNEL))
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             ! X86 INTRINSIC CODE, USING 4 HOUSEHOLDER VECTORS
             do j = ncols, 4, -4
               w(:,1) = bcast_buffer(1:nbw,j+off)
               w(:,2) = bcast_buffer(1:nbw,j+off-1)
               w(:,3) = bcast_buffer(1:nbw,j+off-2)
               w(:,4) = bcast_buffer(1:nbw,j+off-3)
#ifdef WITH_OPENMP
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               call quad_hh_trafo_real_avx_avx2_4hv_double(c_loc(a(1,j+off+a_off-3,istripe,my_thread)), w, &
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                                                  nbw, nl, stripe_width, nbw)
#else
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               call quad_hh_trafo_real_avx_avx2_4hv_double(c_loc(a(1,j+off+a_off-3,istripe)), w, &
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                                                  nbw, nl, stripe_width, nbw)
#endif
             enddo
             do jj = j, 2, -2
               w(:,1) = bcast_buffer(1:nbw,jj+off)
               w(:,2) = bcast_buffer(1:nbw,jj+off-1)
#ifdef WITH_OPENMP
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               call double_hh_trafo_real_avx_avx2_2hv_double(c_loc(a(1,jj+off+a_off-1,istripe,my_thread)), &
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                                                    w, nbw, nl, stripe_width, nbw)
#else
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               call double_hh_trafo_real_avx_avx2_2hv_double(c_loc(a(1,jj+off+a_off-1,istripe)), &
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                                                    w, nbw, nl, stripe_width, nbw)
#endif
             enddo
#ifdef WITH_OPENMP
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             if (jj==1) call single_hh_trafo_real_cpu_openmp_double(a(1:stripe_width,1+off+a_off:1+off+a_off+nbw-1, &
                                                                      istripe,my_thread), &
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                                          bcast_buffer(1:nbw,off+1), nbw, nl, stripe_width)
#else
             if (jj==1) call single_hh_trafo_real_cpu_double(a(1:stripe_width,1+off+a_off:1+off+a_off+nbw-1,istripe), &
                                          bcast_buffer(1:nbw,off+1), nbw, nl, stripe_width)
#endif
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#endif /* defined(WITH_NO_SPECIFIC_REAL_KERNEL) || (defined(WITH_ONE_SPECIFIC_REAL_KERNEL) && !defined(WITH_REAL_AVX_BLOCK6_KERNEL) && !defined(WITH_REAL_AVX2_BLOCK6_KERNEL)) */

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#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
           endif
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
#endif /* WITH_REAL_AVX_BLOCK4_KERNEL */

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#if defined(WITH_REAL_SSE_BLOCK6_KERNEL)
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
           if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_SSE_BLOCK6) then
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
             ! X86 INTRINSIC CODE, USING 6 HOUSEHOLDER VECTORS
             do j = ncols, 6, -6
               w(:,1) = bcast_buffer(1:nbw,j+off)
               w(:,2) = bcast_buffer(1:nbw,j+off-1)
               w(:,3) = bcast_buffer(1:nbw,j+off-2)
               w(:,4) = bcast_buffer(1:nbw,j+off-3)
               w(:,5) = bcast_buffer(1:nbw,j+off-4)
               w(:,6) = bcast_buffer(1:nbw,j+off-5)
#ifdef WITH_OPENMP
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               call hexa_hh_trafo_real_sse_6hv_double(c_loc(a(1,j+off+a_off-5,istripe,my_thread)), w, &
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                                                  nbw, nl, stripe_width, nbw)
#else
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               call hexa_hh_trafo_real_sse_6hv_double(c_loc(a(1,j+off+a_off-5,istripe)), w, &
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                                                  nbw, nl, stripe_width, nbw)
#endif
             enddo
             do jj = j, 4, -4
               w(:,1) = bcast_buffer(1:nbw,jj+off)
               w(:,2) = bcast_buffer(1:nbw,jj+off-1)
               w(:,3) = bcast_buffer(1:nbw,jj+off-2)
               w(:,4) = bcast_buffer(1:nbw,jj+off-3)
#ifdef WITH_OPENMP
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               call quad_hh_trafo_real_sse_4hv_double(c_loc(a(1,jj+off+a_off-3,istripe,my_thread)), w, &
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                                                  nbw, nl, stripe_width, nbw)
#else
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               call quad_hh_trafo_real_sse_4hv_double(c_loc(a(1,jj+off+a_off-3,istripe)), w, &
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                                                  nbw, nl, stripe_width, nbw)
#endif
             enddo
             do jjj = jj, 2, -2
               w(:,1) = bcast_buffer(1:nbw,jjj+off)
               w(:,2) = bcast_buffer(1:nbw,jjj+off-1)
#ifdef WITH_OPENMP
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               call double_hh_trafo_real_sse_2hv_double(c_loc(a(1,jjj+off+a_off-1,istripe,my_thread)), &
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                                                    w, nbw, nl, stripe_width, nbw)
#else
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               call double_hh_trafo_real_sse_2hv_double(c_loc(a(1,jjj+off+a_off-1,istripe)), &
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                                                    w, nbw, nl, stripe_width, nbw)
#endif
             enddo
#ifdef WITH_OPENMP
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             if (jjj==1) call single_hh_trafo_real_cpu_openmp_double(a(1:stripe_width,1+off+a_off:1+off+a_off+nbw-1, &
                                                                        istripe,my_thread), &
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                                           bcast_buffer(1:nbw,off+1), nbw, nl, stripe_width)
#else
             if (jjj==1) call single_hh_trafo_real_cpu_double(a(1:stripe_width,1+off+a_off:1+off+a_off+nbw-1,istripe), &
                                           bcast_buffer(1:nbw,off+1), nbw, nl, stripe_width)
#endif
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
           endif
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
#endif /* WITH_REAL_SSE_BLOCK4_KERNEL */

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#if defined(WITH_REAL_AVX_BLOCK6_KERNEL)
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
           if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_AVX_BLOCK6) then
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
             ! X86 INTRINSIC CODE, USING 6 HOUSEHOLDER VECTORS
             do j = ncols, 6, -6
               w(:,1) = bcast_buffer(1:nbw,j+off)
               w(:,2) = bcast_buffer(1:nbw,j+off-1)
               w(:,3) = bcast_buffer(1:nbw,j+off-2)
               w(:,4) = bcast_buffer(1:nbw,j+off-3)
               w(:,5) = bcast_buffer(1:nbw,j+off-4)
               w(:,6) = bcast_buffer(1:nbw,j+off-5)
#ifdef WITH_OPENMP
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               call hexa_hh_trafo_real_avx_avx2_6hv_double(c_loc(a(1,j+off+a_off-5,istripe,my_thread)), w, &
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                                                  nbw, nl, stripe_width, nbw)
#else
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               call hexa_hh_trafo_real_avx_avx2_6hv_double(c_loc(a(1,j+off+a_off-5,istripe)), w, &
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                                                  nbw, nl, stripe_width, nbw)
#endif
             enddo
             do jj = j, 4, -4
               w(:,1) = bcast_buffer(1:nbw,jj+off)
               w(:,2) = bcast_buffer(1:nbw,jj+off-1)
               w(:,3) = bcast_buffer(1:nbw,jj+off-2)
               w(:,4) = bcast_buffer(1:nbw,jj+off-3)
#ifdef WITH_OPENMP
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               call quad_hh_trafo_real_avx_avx2_4hv_double(c_loc(a(1,jj+off+a_off-3,istripe,my_thread)), w, &
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                                                  nbw, nl, stripe_width, nbw)
#else
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               call quad_hh_trafo_real_avx_avx2_4hv_double(c_loc(a(1,jj+off+a_off-3,istripe)), w, &
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                                                  nbw, nl, stripe_width, nbw)
#endif
             enddo
             do jjj = jj, 2, -2
               w(:,1) = bcast_buffer(1:nbw,jjj+off)
               w(:,2) = bcast_buffer(1:nbw,jjj+off-1)
#ifdef WITH_OPENMP
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               call double_hh_trafo_real_avx_avx2_2hv_double(c_loc(a(1,jjj+off+a_off-1,istripe,my_thread)), &
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                                                    w, nbw, nl, stripe_width, nbw)
#else
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               call double_hh_trafo_real_avx_avx2_2hv_double(c_loc(a(1,jjj+off+a_off-1,istripe)), &
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                                                    w, nbw, nl, stripe_width, nbw)
#endif
             enddo
#ifdef WITH_OPENMP
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             if (jjj==1) call single_hh_trafo_real_cpu_openmp_double(a(1:stripe_width,1+off+a_off:1+off+a_off+nbw-1, &
                                                                       istripe,my_thread), &
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                                           bcast_buffer(1:nbw,off+1), nbw, nl, stripe_width)
#else
             if (jjj==1) call single_hh_trafo_real_cpu_double(a(1:stripe_width,1+off+a_off:1+off+a_off+nbw-1,istripe), &
                                           bcast_buffer(1:nbw,off+1), nbw, nl, stripe_width)
#endif
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
           endif
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
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#endif /* WITH_REAL_AVX_BLOCK6_KERNEL */
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         endif ! GPU_KERNEL

#ifdef WITH_OPENMP
         if (my_thread==1) then
#endif
           kernel_flops = kernel_flops + 4*int(nl,8)*int(ncols,8)*int(nbw,8)
           kernel_time = kernel_time + mpi_wtime()-ttt
#ifdef WITH_OPENMP
         endif
#endif
#ifdef HAVE_DETAILED_TIMINGS
#ifdef WITH_OPENMP
         call timer%stop("compute_hh_trafo_real_cpu_openmp_double")
#else
         call timer%stop("compute_hh_trafo_real_cpu_double")
#endif
#endif

#ifdef WITH_OPENMP
       end subroutine compute_hh_trafo_real_cpu_openmp_double
#else
       end subroutine compute_hh_trafo_real_cpu_double
#endif

#ifdef WANT_SINGLE_PRECISION_REAL
! SINGLE PRECISION IMPLEMENTATION AT THE MOMENT DUPLICATED !!!

#ifdef WITH_OPENMP
       subroutine compute_hh_trafo_real_cpu_openmp_single(a, a_dev, stripe_width, a_dim2, stripe_count, max_threads, l_nev, &
                                                   a_off, nbw, max_blk_size, bcast_buffer, bcast_buffer_dev, hh_dot_dev,    &
                                                   hh_tau_dev, kernel_flops, kernel_time, off, ncols, istripe,              &
                                                   my_thread, thread_width, THIS_REAL_ELPA_KERNEL)
#else
       subroutine compute_hh_trafo_real_cpu_single       (a, a_dev, stripe_width, a_dim2, stripe_count,                      &
                                                   a_off, nbw, max_blk_size, bcast_buffer,  bcast_buffer_dev, hh_dot_dev,     &
                                                   hh_tau_dev, kernel_flops, kernel_time, off, ncols, istripe,                &
                                                   last_stripe_width, THIS_REAL_ELPA_KERNEL)
#endif


         use precision
         use iso_c_binding
         use elpa2_utilities
         use single_hh_trafo_real
         use cuda_c_kernel
         use cuda_functions

#if defined(WITH_REAL_GENERIC_SIMPLE_KERNEL)
         use real_generic_simple_kernel !, only : double_hh_trafo_generic_simple
#endif

#if defined(WITH_REAL_GENERIC_KERNEL) && !(defined(DESPERATELY_WANT_ASSUMED_SIZE))
        use real_generic_kernel !, only : double_hh_trafo_generic
#endif

#if defined(WITH_REAL_BGP_KERNEL)
         use real_bgp_kernel !, only : double_hh_trafo_bgp
#endif

#if defined(WITH_REAL_BGQ_KERNEL)
         use real_bgq_kernel !, only : double_hh_trafo_bgq
#endif
#ifdef HAVE_DETAILED_TIMINGS
         use timings
#endif
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#if defined(HAVE_AVX) || defined(HAVE_SSE_INTRINSICS) || defined(HAVE_SSE_ASSEMBLY)
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         use kernel_interfaces
#endif
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         implicit none
         real(kind=c_double), intent(inout) :: kernel_time  ! MPI_WTIME always needs double
         integer(kind=lik)            :: kernel_flops
         integer(kind=ik), intent(in) :: nbw, max_blk_size
         real(kind=rk4)                :: bcast_buffer(nbw,max_blk_size)
         integer(kind=ik), intent(in) :: a_off

         integer(kind=ik), intent(in) :: stripe_width,a_dim2,stripe_count

#ifndef WITH_OPENMP
         integer(kind=ik), intent(in) :: last_stripe_width
!         real(kind=rk4)                :: a(stripe_width,a_dim2,stripe_count)
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         real(kind=rk4), pointer      :: a(:,:,:)
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#else
         integer(kind=ik), intent(in) :: max_threads, l_nev, thread_width
!         real(kind=rk8)                :: a(stripe_width,a_dim2,stripe_count,max_threads)
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         real(kind=rk4), pointer      :: a(:,:,:,:)
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#endif
         integer(kind=ik), intent(in) :: THIS_REAL_ELPA_KERNEL

         integer(kind=c_intptr_t)     :: a_dev
         integer(kind=c_intptr_t)     :: bcast_buffer_dev
         integer(kind=c_size_t)       :: dev_offset
         integer(kind=c_intptr_t)     :: hh_dot_dev
         integer(kind=c_intptr_t)     :: hh_tau_dev
         ! Private variables in OMP regions (my_thread) should better be in the argument list!
         integer(kind=ik)             :: off, ncols, istripe
#ifdef WITH_OPENMP
         integer(kind=ik)             :: my_thread, noff
#endif
         integer(kind=ik)             :: j, nl, jj, jjj
         real(kind=rk4)                :: w(nbw,6)
         real(kind=c_double)          :: ttt ! MPI_WTIME always needs double

         if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_GPU) then
           ! ncols - indicates the number of HH reflectors to apply; at least 1 must be available
           if (ncols < 1) return
         endif

#ifdef HAVE_DETAILED_TIMINGS
#ifdef WITH_OPENMP
         call timer%start("compute_hh_trafo_real_cpu_openmp_single")
#else
         call timer%start("compute_hh_trafo_real_cpu_single")
#endif
#endif
         ttt = mpi_wtime()

#ifndef WITH_OPENMP
         nl = merge(stripe_width, last_stripe_width, istripe<stripe_count)
#else
         if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_GPU) then
           print *,"compute_hh_trafo_real GPU OPENMP: not yet implemented"
           stop
         endif

         if (istripe<stripe_count) then
           nl = stripe_width
         else
           noff = (my_thread-1)*thread_width + (istripe-1)*stripe_width
           nl = min(my_thread*thread_width-noff, l_nev-noff)
           if (nl<=0) then
#ifdef HAVE_DETAILED_TIMINGS
#ifdef WITH_OPENMP
             call timer%stop("compute_hh_trafo_real_cpu_openmp_single")
#else
             call timer%stop("compute_hh_trafo_real_cpu_single")
#endif
#endif
             return
           endif
         endif
#endif /* not WITH_OPENMP */

         if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_GPU) then
           dev_offset = (0 + (a_off * stripe_width) + ( (istripe - 1) * stripe_width *a_dim2 )) *size_of_single_real_datatype
           call launch_compute_hh_trafo_c_kernel_real_single(a_dev + dev_offset, bcast_buffer_dev, hh_dot_dev, &
                                                      hh_tau_dev, nl, nbw, stripe_width, off, ncols)
         else ! not CUDA kernel

#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
           if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_AVX_BLOCK2 .or. &
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               THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_SSE_BLOCK2 .or. &
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               THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_GENERIC    .or. &
               THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_GENERIC_SIMPLE .or. &
               THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_SSE .or.        &
               THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_BGP .or.        &
               THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_BGQ) then
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */

             !FORTRAN CODE / X86 INRINISIC CODE / BG ASSEMBLER USING 2 HOUSEHOLDER VECTORS
#if defined(WITH_REAL_GENERIC_KERNEL)
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
             if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_GENERIC) then
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */

               do j = ncols, 2, -2
                 w(:,1) = bcast_buffer(1:nbw,j+off)
                 w(:,2) = bcast_buffer(1:nbw,j+off-1)

#ifdef WITH_OPENMP
#ifdef DESPERATELY_WANT_ASSUMED_SIZE
                 call double_hh_trafo_generic_single(a(1,j+off+a_off-1,istripe,my_thread), w, &
                                            nbw, nl, stripe_width, nbw)

#else
                 call double_hh_trafo_generic_single(a(1:stripe_width,j+off+a_off-1:j+off+a_off+nbw-1, &
                                              istripe,my_thread), w(1:nbw,1:6), &
                                              nbw, nl, stripe_width, nbw)
#endif

#else /* WITH_OPENMP */

#ifdef DESPERATELY_WANT_ASSUMED_SIZE
                 call double_hh_trafo_generic_single(a(1,j+off+a_off-1,istripe),w, &
                                            nbw, nl, stripe_width, nbw)

#else
                 call double_hh_trafo_generic_single(a(1:stripe_width,j+off+a_off-1:j+off+a_off+nbw-1,istripe),w(1:nbw,1:6), &
                                            nbw, nl, stripe_width, nbw)
#endif
#endif /* WITH_OPENMP */

               enddo

#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
             endif
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
#endif /* WITH_REAL_GENERIC_KERNEL */


#if defined(WITH_REAL_GENERIC_SIMPLE_KERNEL)
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
             if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_GENERIC_SIMPLE) then
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
               do j = ncols, 2, -2
                 w(:,1) = bcast_buffer(1:nbw,j+off)
                 w(:,2) = bcast_buffer(1:nbw,j+off-1)
#ifdef WITH_OPENMP
#ifdef DESPERATELY_WANT_ASSUMED_SIZE
                 call double_hh_trafo_generic_simple_single(a(1,j+off+a_off-1,istripe,my_thread), &
                                                       w, nbw, nl, stripe_width, nbw)
#else
                 call double_hh_trafo_generic_simple_single(a(1:stripe_width,j+off+a_off-1:j+off+a_off-1+nbw,istripe,my_thread), &
                                                     w, nbw, nl, stripe_width, nbw)

#endif

#else /* WITH_OPENMP */
#ifdef DESPERATELY_WANT_ASSUMED_SIZE
                 call double_hh_trafo_generic_simple_single(a(1,j+off+a_off-1,istripe), &
                                                       w, nbw, nl, stripe_width, nbw)
#else
                 call double_hh_trafo_generic_simple_single(a(1:stripe_width,j+off+a_off-1:j+off+a_off-1+nbw,istripe), &
                                                     w, nbw, nl, stripe_width, nbw)

#endif

#endif /* WITH_OPENMP */

               enddo
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
             endif
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
#endif /* WITH_REAL_GENERIC_SIMPLE_KERNEL */


856
#if defined(WITH_REAL_SSE_ASSEMBLY_KERNEL)
857
858
859
860
861
862
863
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
             if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_SSE) then
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
               do j = ncols, 2, -2
                 w(:,1) = bcast_buffer(1:nbw,j+off)
                 w(:,2) = bcast_buffer(1:nbw,j+off-1)
#ifdef WITH_OPENMP
864
865
                 call double_hh_trafo_single(a(1,j+off+a_off-1,istripe,my_thread), w, nbw, nl, &
                                      stripe_width, nbw)
866
#else
867
868
                 call double_hh_trafo_single(a(1,j+off+a_off-1,istripe), w, nbw, nl, &
                                      stripe_width, nbw)
869
870
871
872
873
#endif
               enddo
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
             endif
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
874
#endif /* WITH_REAL_SSE_ASSEMBLY_KERNEL */
875

876
877
878
879
880
881
882
883
#if defined(WITH_REAL_SSE_BLOCK2_KERNEL)
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
             if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_SSE_BLOCK2) then
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
               do j = ncols, 2, -2
                 w(:,1) = bcast_buffer(1:nbw,j+off)
                 w(:,2) = bcast_buffer(1:nbw,j+off-1)
#ifdef WITH_OPENMP
884
                 call double_hh_trafo_real_sse_2hv_single(c_loc(a(1,j+off+a_off-1,istripe,my_thread)), &
885
886
                                                       w, nbw, nl, stripe_width, nbw)
#else
887
                 call double_hh_trafo_real_sse_2hv_single(c_loc(a(1,j+off+a_off-1,istripe)), &
888
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890
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893
894
895
                                                       w, nbw, nl, stripe_width, nbw)
#endif
               enddo
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
             endif
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
#endif /* WITH_REAL_SSE_BLOCK2_KERNEL */

896
897
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899
900
901
902
903
#if defined(WITH_REAL_AVX_BLOCK2_KERNEL)
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
             if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_AVX_BLOCK2) then
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
               do j = ncols, 2, -2
                 w(:,1) = bcast_buffer(1:nbw,j+off)
                 w(:,2) = bcast_buffer(1:nbw,j+off-1)
#ifdef WITH_OPENMP
904
                 call double_hh_trafo_real_avx_avx2_2hv_single(c_loc(a(1,j+off+a_off-1,istripe,my_thread)), &
905
906
                                                       w, nbw, nl, stripe_width, nbw)
#else
907
                 call double_hh_trafo_real_avx_avx2_2hv_single(c_loc(a(1,j+off+a_off-1,istripe)), &
908
909
                                                       w, nbw, nl, stripe_width, nbw)
#endif
910
               enddo
911
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
912
             endif
913
914
915
916
917
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
#endif /* WITH_REAL_AVX_BLOCK2_KERNEL */

#if defined(WITH_REAL_BGP_KERNEL)
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
918
             if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_BGP) then
919
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
920
921
922
               do j = ncols, 2, -2
                 w(:,1) = bcast_buffer(1:nbw,j+off)
                 w(:,2) = bcast_buffer(1:nbw,j+off-1)
923
#ifdef WITH_OPENMP
924
                 call double_hh_trafo_bgp_single(a(1,j+off+a_off-1,istripe,my_thread), w, nbw, nl, &
925
926
                                          stripe_width, nbw)
#else
927
                 call double_hh_trafo_bgp_single(a(1,j+off+a_off-1,istripe), w, nbw, nl, &
928
929
                                          stripe_width, nbw)
#endif
930
               enddo
931
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
932
             endif
933
934
935
936
937
938
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
#endif /* WITH_REAL_BGP_KERNEL */


#if defined(WITH_REAL_BGQ_KERNEL)
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
939
             if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_BGQ) then
940
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
941
942
943
               do j = ncols, 2, -2
                 w(:,1) = bcast_buffer(1:nbw,j+off)
                 w(:,2) = bcast_buffer(1:nbw,j+off-1)
944
#ifdef WITH_OPENMP
945
                 call double_hh_trafo_bgq_single(a(1,j+off+a_off-1,istripe,my_thread), w, nbw, nl, &
946
947
                                          stripe_width, nbw)
#else
948
                 call double_hh_trafo_bgq_single(a(1,j+off+a_off-1,istripe), w, nbw, nl, &
949
950
                                          stripe_width, nbw)
#endif
951
               enddo
952
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
953
             endif
954
955
956
957
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
#endif /* WITH_REAL_BGQ_KERNEL */

#ifdef WITH_OPENMP
958
959
             if (j==1) call single_hh_trafo_real_cpu_openmp_single(a(1:stripe_width, &
                                   1+off+a_off:1+off+a_off+nbw-1,istripe,my_thread), &
960
961
962
                                      bcast_buffer(1:nbw,off+1), nbw, nl,     &
                                      stripe_width)
#else
963
964
             if (j==1) call single_hh_trafo_real_cpu_single(a(1:stripe_width, &
                                    1+off+a_off:1+off+a_off+nbw-1,istripe),           &
965
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967
968
969
970
                                      bcast_buffer(1:nbw,off+1), nbw, nl,     &
                                      stripe_width)
#endif


#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
971
           endif !
972
973
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */

974
#if defined(WITH_REAL_SSE_BLOCK4_KERNEL)
975
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
976
977
978
979
980
981
982
983
984
         if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_SSE_BLOCK4) then
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
           ! X86 INTRINSIC CODE, USING 4 HOUSEHOLDER VECTORS
           do j = ncols, 4, -4
             w(:,1) = bcast_buffer(1:nbw,j+off)
             w(:,2) = bcast_buffer(1:nbw,j+off-1)
             w(:,3) = bcast_buffer(1:nbw,j+off-2)
             w(:,4) = bcast_buffer(1:nbw,j+off-3)
#ifdef WITH_OPENMP
985
             call quad_hh_trafo_real_sse_4hv_single(c_loc(a(1,j+off+a_off-3,istripe,my_thread)), w, &
986
987
                                                  nbw, nl, stripe_width, nbw)
#else
988
             call quad_hh_trafo_real_sse_4hv_single(c_loc(a(1,j+off+a_off-3,istripe)), w, &
989
990
991
992
993
994
995
                                                  nbw, nl, stripe_width, nbw)
#endif
           enddo
           do jj = j, 2, -2
             w(:,1) = bcast_buffer(1:nbw,jj+off)
             w(:,2) = bcast_buffer(1:nbw,jj+off-1)
#ifdef WITH_OPENMP
996
             call double_hh_trafo_real_sse_2hv_single(c_loc(a(1,jj+off+a_off-1,istripe,my_thread)), &
997
998
                                                    w, nbw, nl, stripe_width, nbw)
#else
999
             call double_hh_trafo_real_sse_2hv_single(c_loc(a(1,jj+off+a_off-1,istripe)), &
1000
1001
1002
1003
                                                    w, nbw, nl, stripe_width, nbw)
#endif
           enddo
#ifdef WITH_OPENMP
1004
1005
           if (jj==1) call single_hh_trafo_real_cpu_openmp_single(a(1:stripe_width,1+off+a_off:1+off+a_off+nbw-1, &
                                                                    istripe,my_thread), &
1006
1007
                                          bcast_buffer(1:nbw,off+1), nbw, nl, stripe_width)
#else
1008
           if (jj==1) call single_hh_trafo_real_cpu_single(a(1:stripe_width,1+off+a_off:1+off+a_off+nbw-1,istripe), &
1009
1010
1011
1012
1013
1014
1015
                                          bcast_buffer(1:nbw,off+1), nbw, nl, stripe_width)
#endif
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
         endif
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
#endif /* WITH_REAL_SSE_BLOCK4_KERNEL */

1016
#if defined(WITH_REAL_AVX_BLOCK4_KERNEL) || defined(WITH_REAL_AVX2_BLOCK4_KERNEL)
1017
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
1018
1019
         if ((THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_AVX_BLOCK4) .or. &
             (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_AVX2_BLOCK4)) then
1020
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
1021
1022
1023
1024
1025
1026
             ! X86 INTRINSIC CODE, USING 4 HOUSEHOLDER VECTORS
             do j = ncols, 4, -4
               w(:,1) = bcast_buffer(1:nbw,j+off)
               w(:,2) = bcast_buffer(1:nbw,j+off-1)
               w(:,3) = bcast_buffer(1:nbw,j+off-2)
               w(:,4) = bcast_buffer(1:nbw,j+off-3)
1027
#ifdef WITH_OPENMP
1028

1029
             call quad_hh_trafo_real_avx_avx2_4hv_single(c_loc(a(1,j+off+a_off-3,istripe,my_thread)), w, &
1030
1031
                                                  nbw, nl, stripe_width, nbw)
#else
1032
             call quad_hh_trafo_real_avx_avx2_4hv_single(c_loc(a(1,j+off+a_off-3,istripe)), w, &
1033
1034
                                                  nbw, nl, stripe_width, nbw)
#endif
1035
1036
1037
1038
             enddo
             do jj = j, 2, -2
               w(:,1) = bcast_buffer(1:nbw,jj+off)
               w(:,2) = bcast_buffer(1:nbw,jj+off-1)
1039
#ifdef WITH_OPENMP
1040

1041
             call double_hh_trafo_real_avx_avx2_2hv_single(c_loc(a(1,jj+off+a_off-1,istripe,my_thread)), &
1042
1043
                                                    w, nbw, nl, stripe_width, nbw)
#else
1044
             call double_hh_trafo_real_avx_avx2_2hv_single(c_loc(a(1,jj+off+a_off-1,istripe)), &
1045
1046
                                                    w, nbw, nl, stripe_width, nbw)
#endif
1047
             enddo
1048
#ifdef WITH_OPENMP
1049
1050
             if (jj==1) call single_hh_trafo_real_cpu_openmp_single(a(1:stripe_width,1+off+a_off:1+off+a_off+nbw-1, &
                                                                      istripe,my_thread), &
1051
1052
                                          bcast_buffer(1:nbw,off+1), nbw, nl, stripe_width)
#else
1053
             if (jj==1) call single_hh_trafo_real_cpu_single(a(1:stripe_width,1+off+a_off:1+off+a_off+nbw-1,istripe), &
1054
1055
1056
                                          bcast_buffer(1:nbw,off+1), nbw, nl, stripe_width)
#endif
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
1057
           endif
1058
1059
1060
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
#endif /* WITH_REAL_AVX_BLOCK4_KERNEL */

1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
#if defined(WITH_REAL_SSE_BLOCK6_KERNEL)
#if defined(WITH_NO_SPECIFIC_REAL_KERNEL)
         if (THIS_REAL_ELPA_KERNEL .eq. REAL_ELPA_KERNEL_SSE_BLOCK6) then
#endif /* WITH_NO_SPECIFIC_REAL_KERNEL */
           ! X86 INTRINSIC CODE, USING 6 HOUSEHOLDER VECTORS
           do j = ncols, 6, -6
             w(:,1) = bcast_buffer(1:nbw,j+off)
             w(:,2) = bcast_buffer(1:nbw,j+off-1)
             w(:,3) = bcast_buffer(1:nbw,j+off-2)
             w(:,4) = bcast_buffer(1:nbw,j+off-3)
             w(:,5) = bcast_buffer(1:nbw,j+off-4)
             w(:,6) = bcast_buffer(1:nbw,j+off-5)
#ifdef WITH_OPENMP