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923 lines
28 KiB
Fortran
923 lines
28 KiB
Fortran
!
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! Parallel Sparse BLAS version 3.5
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! (C) Copyright 2006-2018
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! Salvatore Filippone
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! Alfredo Buttari
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!
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! Redistribution and use in source and binary forms, with or without
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! modification, are permitted provided that the following conditions
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! are met:
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! 1. Redistributions of source code must retain the above copyright
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! notice, this list of conditions and the following disclaimer.
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! 2. Redistributions in binary form must reproduce the above copyright
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! notice, this list of conditions, and the following disclaimer in the
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! documentation and/or other materials provided with the distribution.
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! 3. The name of the PSBLAS group or the names of its contributors may
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! not be used to endorse or promote products derived from this
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! software without specific written permission.
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!
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! THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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! ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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! TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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! PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PSBLAS GROUP OR ITS CONTRIBUTORS
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! BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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! CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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! SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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! INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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! CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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! ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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! POSSIBILITY OF SUCH DAMAGE.
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!
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!
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! File: psb_sspmm.f90
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!
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!
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! Subroutine: psb_sspm_vect
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! Performs one of the distributed matrix-vector operations
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!
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! Y := alpha * Pr * A * Pc * X + beta * Y, or
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!
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! Y := alpha * Pr * A' * Pr * X + beta * Y,
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!
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! alpha and beta are scalars, X and Y are distributed
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! vectors and A is a M-by-N distributed matrix.
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!
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! Arguments:
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! alpha - real The scalar alpha.
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! a - type(psb_sspmat_type). The sparse matrix containing A.
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! x - type(psb_s_vect_type) The input vector containing the entries of ( X ).
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! beta - real The scalar beta.
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! y - type(psb_s_vect_type) The input vector containing the entries of ( Y ).
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! desc_a - type(psb_desc_type). The communication descriptor.
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! info - integer. Return code
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! trans - character(optional). Whether A or A'. Default: 'N'
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! work(:) - real,(optional). Working area.
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! doswap - logical(optional). Whether to performe halo updates.
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!
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subroutine psb_sspmv_vect(alpha,a,x,beta,y,desc_a,info,&
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& trans, work, doswap)
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use psb_base_mod, psb_protect_name => psb_sspmv_vect
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use psi_mod
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implicit none
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real(psb_spk_), intent(in) :: alpha, beta
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type(psb_s_vect_type), intent(inout) :: x
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type(psb_s_vect_type), intent(inout) :: y
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type(psb_sspmat_type), intent(in) :: a
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type(psb_desc_type), intent(in) :: desc_a
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integer(psb_ipk_), intent(out) :: info
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real(psb_spk_), optional, target, intent(inout) :: work(:)
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character, intent(in), optional :: trans
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logical, intent(in), optional :: doswap
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! locals
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type(psb_ctxt_type) :: ctxt
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integer(psb_ipk_) :: np, me,&
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& err_act, iix, jjx, iia, jja, nrow, ncol, lldx, lldy, &
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& liwork, iiy, jjy, ib, ip, idx
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integer(psb_lpk_) :: ix, ijx, iy, ijy, m, n, ia, ja
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integer(psb_ipk_), parameter :: nb=4
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real(psb_spk_), pointer :: iwork(:), xp(:), yp(:)
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real(psb_spk_), allocatable :: xvsave(:)
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character :: trans_
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character(len=20) :: name, ch_err
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logical :: aliw, doswap_
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integer(psb_ipk_) :: debug_level, debug_unit
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name='psb_sspmv'
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info=psb_success_
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call psb_erractionsave(err_act)
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if (psb_errstatus_fatal()) then
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info = psb_err_internal_error_ ; goto 9999
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end if
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debug_unit = psb_get_debug_unit()
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debug_level = psb_get_debug_level()
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ctxt=desc_a%get_context()
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call psb_info(ctxt, me, np)
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if (np == -1) then
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info = psb_err_context_error_
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call psb_errpush(info,name)
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goto 9999
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endif
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if (.not.allocated(x%v)) then
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info = psb_err_invalid_vect_state_
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call psb_errpush(info,name)
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goto 9999
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endif
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if (.not.allocated(y%v)) then
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info = psb_err_invalid_vect_state_
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call psb_errpush(info,name)
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goto 9999
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endif
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if (present(doswap)) then
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doswap_ = doswap
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else
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doswap_ = .true.
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endif
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if (present(trans)) then
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trans_ = psb_toupper(trans)
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else
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trans_ = 'N'
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endif
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if ( (trans_ == 'N').or.(trans_ == 'T')&
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& .or.(trans_ == 'C')) then
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else
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info = psb_err_iarg_invalid_value_
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call psb_errpush(info,name)
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goto 9999
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end if
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m = desc_a%get_global_rows()
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n = desc_a%get_global_cols()
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nrow = desc_a%get_local_rows()
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ncol = desc_a%get_local_cols()
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lldx = x%get_nrows()
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lldy = y%get_nrows()
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if ((info == 0).and.(lldx<ncol)) call x%reall(ncol,info)
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if ((info == 0).and.(lldy<ncol)) call y%reall(ncol,info)
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if (psb_errstatus_fatal()) then
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info=psb_err_from_subroutine_
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ch_err='reall'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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iwork => null()
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! check for presence/size of a work area
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liwork= 2*ncol
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if (present(work)) then
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if (size(work) >= liwork) then
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aliw =.false.
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else
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aliw=.true.
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endif
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else
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aliw=.true.
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end if
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if (aliw) then
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allocate(iwork(liwork),stat=info)
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if(info /= psb_success_) then
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info=psb_err_from_subroutine_
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ch_err='Allocate'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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else
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iwork => work
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endif
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if (debug_level >= psb_debug_comp_) &
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& write(debug_unit,*) me,' ',trim(name),' Allocated work ', info
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if (trans_ == 'N') then
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! Matrix is not transposed
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if (allocated(a%ad)) then
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block
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logical, parameter :: do_timings=.true.
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real(psb_dpk_) :: t1, t2, t3, t4, t5
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if (do_timings) call psb_barrier(ctxt)
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if (do_timings) t1= psb_wtime()
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if (doswap_) call psi_swapdata(psb_swap_send_,&
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& szero,x%v,desc_a,iwork,info,data=psb_comm_halo_)
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if (do_timings) t2= psb_wtime()
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call a%ad%spmm(alpha,x%v,beta,y%v,info)
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if (do_timings) t3= psb_wtime()
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if (doswap_) call psi_swapdata(psb_swap_recv_,&
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& szero,x%v,desc_a,iwork,info,data=psb_comm_halo_)
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if (do_timings) t4= psb_wtime()
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call a%and%spmm(alpha,x%v,sone,y%v,info)
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if (do_timings) t5= psb_wtime()
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if (do_timings) write(0,*) me,' SPMM:',t2-t1,t3-t2,t4-t3,t5-t4
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end block
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else
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if (doswap_) then
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call psi_swapdata(ior(psb_swap_send_,psb_swap_recv_),&
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& szero,x%v,desc_a,iwork,info,data=psb_comm_halo_)
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end if
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call psb_csmm(alpha,a,x,beta,y,info)
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end if
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if(info /= psb_success_) then
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info = psb_err_from_subroutine_non_
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call psb_errpush(info,name)
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goto 9999
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end if
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else
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! Matrix is transposed
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!
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! Non-empty overlap, need a buffer to hold
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! the entries updated with average operator.
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! Why the average? because in this way they will contribute
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! with a proper scale factor (1/np) to the overall product.
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!
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call psi_ovrl_save(x%v,xvsave,desc_a,info)
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if (info == psb_success_) call psi_ovrl_upd(x%v,desc_a,psb_avg_,info)
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if (beta /= szero) call y%set(szero,nrow+1,ncol)
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! local Matrix-vector product
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if (info == psb_success_) call psb_csmm(alpha,a,x,beta,y,info,trans=trans_)
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if (debug_level >= psb_debug_comp_) &
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& write(debug_unit,*) me,' ',trim(name),' csmm ', info
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if (info == psb_success_) call psi_ovrl_restore(x%v,xvsave,desc_a,info)
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if (info /= psb_success_) then
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info = psb_err_from_subroutine_
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ch_err='psb_csmm'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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if (doswap_) then
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call psi_swaptran(ior(psb_swap_send_,psb_swap_recv_),&
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& sone,y%v,desc_a,iwork,info)
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if (info == psb_success_) call psi_swapdata(ior(psb_swap_send_,psb_swap_recv_),&
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& sone,y%v,desc_a,iwork,info,data=psb_comm_ovr_)
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if (debug_level >= psb_debug_comp_) &
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& write(debug_unit,*) me,' ',trim(name),' swaptran ', info
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if(info /= psb_success_) then
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info = psb_err_from_subroutine_
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ch_err='PSI_SwapTran'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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end if
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end if
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if (aliw) deallocate(iwork,stat=info)
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if (debug_level >= psb_debug_comp_) &
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& write(debug_unit,*) me,' ',trim(name),' deallocat ',aliw, info
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if(info /= psb_success_) then
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info = psb_err_from_subroutine_
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ch_err='Deallocate iwork'
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call psb_errpush(info,name,a_err=ch_err)
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goto 9999
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end if
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nullify(iwork)
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call psb_erractionrestore(err_act)
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if (debug_level >= psb_debug_comp_) then
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call psb_barrier(ctxt)
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write(debug_unit,*) me,' ',trim(name),' Returning '
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endif
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return
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9999 call psb_error_handler(ctxt,err_act)
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return
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end subroutine psb_sspmv_vect
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!
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! Subroutine: psb_sspmm
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! Performs one of the distributed matrix-vector operations
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!
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! sub( Y ) := alpha * Pr * A * Pc * sub( X ) + beta * sub( Y ), or
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!
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! sub( Y ) := alpha * Pr * A' * Pr * sub( X ) + beta * sub( Y ),
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!
|
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! where:
|
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!
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! sub( X ) denotes: X(1:N,JX:JX+K-1),
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!
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! sub( Y ) denotes: Y(1:M,JY:JY+K-1),
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!
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! alpha and beta are scalars, and sub( X ) and sub( Y ) are distributed
|
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! vectors and A is a M-by-N distributed matrix.
|
|
!
|
|
! Arguments:
|
|
! alpha - real The scalar alpha.
|
|
! a - type(psb_sspmat_type). The sparse matrix containing A.
|
|
! x(:,:) - real The input vector containing the entries of ( X ).
|
|
! beta - real The scalar beta.
|
|
! y(:,:) - real The input vector containing the entries of ( Y ).
|
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! desc_a - type(psb_desc_type). The communication descriptor.
|
|
! info - integer. Return code
|
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! trans - character(optional). Whether A or A'. Default: 'N'
|
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! k - integer(optional). The number of right-hand sides.
|
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! jx - integer(optional). The column offset for ( X ). Default: 1
|
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! jy - integer(optional). The column offset for ( Y ). Default: 1
|
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! work(:) - real,(optional). Working area.
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! doswap - logical(optional). Whether to performe halo updates.
|
|
!
|
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subroutine psb_sspmm(alpha,a,x,beta,y,desc_a,info,&
|
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& trans, k, jx, jy, work, doswap)
|
|
use psb_base_mod, psb_protect_name => psb_sspmm
|
|
use psi_mod
|
|
implicit none
|
|
|
|
real(psb_spk_), intent(in) :: alpha, beta
|
|
real(psb_spk_), intent(inout), target :: x(:,:)
|
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real(psb_spk_), intent(inout), target :: y(:,:)
|
|
type(psb_sspmat_type), intent(in) :: a
|
|
type(psb_desc_type), intent(in) :: desc_a
|
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integer(psb_ipk_), intent(out) :: info
|
|
real(psb_spk_), optional, target, intent(inout) :: work(:)
|
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character, intent(in), optional :: trans
|
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integer(psb_ipk_), intent(in), optional :: k, jx, jy
|
|
logical, intent(in), optional :: doswap
|
|
|
|
! locals
|
|
type(psb_ctxt_type) :: ctxt
|
|
integer(psb_ipk_) :: np, me,&
|
|
& err_act, iix, jjx, iia, jja, nrow, ncol, lldx, lldy, &
|
|
& liwork, iiy, jjy, i, ib, ib1, ip, idx, ik
|
|
integer(psb_lpk_) :: ix, ijx, iy, ijy, m, n, ia, ja, lik
|
|
integer(psb_ipk_), parameter :: nb=4
|
|
real(psb_spk_), pointer :: xp(:,:), yp(:,:), iwork(:)
|
|
real(psb_spk_), allocatable :: xvsave(:,:)
|
|
character :: trans_
|
|
character(len=20) :: name, ch_err
|
|
logical :: aliw, doswap_
|
|
integer(psb_ipk_) :: debug_level, debug_unit
|
|
|
|
name='psb_sspmm'
|
|
info=psb_success_
|
|
call psb_erractionsave(err_act)
|
|
if (psb_errstatus_fatal()) then
|
|
info = psb_err_internal_error_ ; goto 9999
|
|
end if
|
|
debug_unit = psb_get_debug_unit()
|
|
debug_level = psb_get_debug_level()
|
|
|
|
ctxt=desc_a%get_context()
|
|
|
|
call psb_info(ctxt, me, np)
|
|
if (np == -1) then
|
|
info = psb_err_context_error_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
endif
|
|
|
|
ia = 1
|
|
ja = 1
|
|
|
|
ix = 1
|
|
if (present(jx)) then
|
|
ijx = jx
|
|
else
|
|
ijx = 1
|
|
endif
|
|
|
|
iy = 1
|
|
if (present(jy)) then
|
|
ijy = jy
|
|
else
|
|
ijy = 1
|
|
endif
|
|
|
|
if (present(doswap)) then
|
|
doswap_ = doswap
|
|
else
|
|
doswap_ = .true.
|
|
endif
|
|
|
|
if (present(k)) then
|
|
lik = min(k,size(x,2)-ijx+1)
|
|
lik = min(lik,size(y,2)-ijy+1)
|
|
else
|
|
lik = min(size(x,2)-ijx+1,size(y,2)-ijy+1)
|
|
endif
|
|
|
|
if (present(trans)) then
|
|
trans_ = psb_toupper(trans)
|
|
else
|
|
trans_ = 'N'
|
|
endif
|
|
if ( (trans_ == 'N').or.(trans_ == 'T')&
|
|
& .or.(trans_ == 'C')) then
|
|
else
|
|
info = psb_err_iarg_invalid_value_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
m = desc_a%get_global_rows()
|
|
n = desc_a%get_global_cols()
|
|
nrow = desc_a%get_local_rows()
|
|
ncol = desc_a%get_local_cols()
|
|
lldx = size(x,1)
|
|
lldy = size(y,1)
|
|
|
|
! check for presence/size of a work area
|
|
liwork= 2*ncol
|
|
|
|
if (present(work)) then
|
|
if (size(work) >= liwork) then
|
|
aliw =.false.
|
|
else
|
|
aliw=.true.
|
|
endif
|
|
else
|
|
aliw=.true.
|
|
end if
|
|
|
|
if (aliw) then
|
|
allocate(iwork(liwork),stat=info)
|
|
if(info /= psb_success_) then
|
|
info=psb_err_from_subroutine_
|
|
ch_err='psb_realloc'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
else
|
|
iwork => work
|
|
endif
|
|
|
|
iwork(1)=szero
|
|
|
|
! checking for matrix correctness
|
|
call psb_chkmat(m,n,ia,ja,desc_a,info,iia,jja)
|
|
if(info /= psb_success_) then
|
|
info=psb_err_from_subroutine_
|
|
ch_err='psb_chkmat'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
|
|
|
|
if (trans_ == 'N') then
|
|
! Matrix is not transposed
|
|
if((ja /= ix).or.(ia /= iy)) then
|
|
! this case is not yet implemented
|
|
info = psb_err_ja_nix_ia_niy_unsupported_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
! checking for vectors correctness
|
|
call psb_chkvect(n,lik,lldx,ix,ijx,desc_a,info,iix,jjx,check_halo=.true.)
|
|
if (info == psb_success_) &
|
|
& call psb_chkvect(m,lik,lldy,iy,ijy,desc_a,info,iiy,jjy)
|
|
if(info /= psb_success_) then
|
|
info=psb_err_from_subroutine_
|
|
ch_err='psb_chkvect'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
|
|
if((iix /= 1).or.(iiy /= 1)) then
|
|
! this case is not yet implemented
|
|
info = psb_err_ix_n1_iy_n1_unsupported_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
|
|
if (doswap_.and.(np>1)) then
|
|
ib1=min(nb,lik)
|
|
xp => x(iix:lldx,jjx:jjx+ib1-1)
|
|
if (doswap_)&
|
|
& call psi_swapdata(ior(psb_swap_send_,psb_swap_recv_),&
|
|
& ib1,szero,xp,desc_a,iwork,info)
|
|
|
|
|
|
blk: do i=1, lik, nb
|
|
ib=ib1
|
|
ib1 = max(0,min(nb,(lik)-(i-1+ib)))
|
|
xp => x(iix:lldx,jjx+i-1+ib:jjx+i-1+ib+ib1-1)
|
|
if ((ib1 > 0).and.(doswap_)) &
|
|
& call psi_swapdata(psb_swap_send_,ib1,&
|
|
& szero,xp,desc_a,iwork,info)
|
|
|
|
if(info /= psb_success_) exit blk
|
|
|
|
! local Matrix-vector product
|
|
call psb_csmm(alpha,a,x(:,jjx+i-1:jjx+i-1+ib-1),&
|
|
& beta,y(:,jjy+i-1:jjy+i-1+ib-1),info,trans=trans_)
|
|
|
|
if(info /= psb_success_) exit blk
|
|
|
|
if((ib1 > 0).and.(doswap_))&
|
|
& call psi_swapdata(psb_swap_recv_,ib1,&
|
|
& szero,xp,desc_a,iwork,info)
|
|
|
|
if(info /= psb_success_) exit blk
|
|
end do blk
|
|
else
|
|
if (doswap_)&
|
|
& call psi_swapdata(ior(psb_swap_send_,psb_swap_recv_),&
|
|
& ib1,szero,x(:,1:lik),desc_a,iwork,info)
|
|
if (info == psb_success_) call psb_csmm(alpha,a,x(:,1:lik),beta,y(:,1:lik),info)
|
|
end if
|
|
if(info /= psb_success_) then
|
|
info = psb_err_from_subroutine_non_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
else
|
|
|
|
! Matrix is transposed
|
|
if((ja /= iy).or.(ia /= ix)) then
|
|
! this case is not yet implemented
|
|
info = psb_err_ja_nix_ia_niy_unsupported_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
|
|
! checking for vectors correctness
|
|
call psb_chkvect(m,lik,lldx,ix,ijx,desc_a,info,iix,jjx,check_halo=.true.)
|
|
if (info == psb_success_) &
|
|
& call psb_chkvect(n,lik,lldy,iy,ijy,desc_a,info,iiy,jjy,check_halo=.true.)
|
|
if(info /= psb_success_) then
|
|
info=psb_err_from_subroutine_
|
|
ch_err='psb_chkvect'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
|
|
if((iix /= 1).or.(iiy /= 1)) then
|
|
! this case is not yet implemented
|
|
info = psb_err_ix_n1_iy_n1_unsupported_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
!
|
|
! Non-empty overlap, need a buffer to hold
|
|
! the entries updated with average operator.
|
|
! Why the average? because in this way they will contribute
|
|
! with a proper scale factor (1/np) to the overall product.
|
|
!
|
|
call psi_ovrl_save(x(:,1:lik),xvsave,desc_a,info)
|
|
if (info == psb_success_) call psi_ovrl_upd(x,desc_a,psb_avg_,info)
|
|
y(nrow+1:ncol,1:lik) = szero
|
|
|
|
if (info == psb_success_) &
|
|
& call psb_csmm(alpha,a,x(:,1:lik),beta,y(:,1:lik),info,trans=trans_)
|
|
if (debug_level >= psb_debug_comp_) &
|
|
& write(debug_unit,*) me,' ',trim(name),' csmm ', info
|
|
if (info /= psb_success_) then
|
|
info = psb_err_from_subroutine_
|
|
ch_err='psb_csmm'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
if (info == psb_success_) call psi_ovrl_restore(x,xvsave,desc_a,info)
|
|
|
|
if (doswap_)then
|
|
ik = lik ! This should not be an issue, we are expecting the values
|
|
! to be small, within IPK
|
|
call psi_swaptran(ior(psb_swap_send_,psb_swap_recv_),&
|
|
& ik,sone,y(:,1:ik),desc_a,iwork,info)
|
|
if (info == psb_success_) call psi_swapdata(ior(psb_swap_send_,psb_swap_recv_),&
|
|
& ik,sone,y(:,1:ik),desc_a,iwork,info,data=psb_comm_ovr_)
|
|
|
|
if (debug_level >= psb_debug_comp_) &
|
|
& write(debug_unit,*) me,' ',trim(name),' swaptran ', info
|
|
if(info /= psb_success_) then
|
|
info = psb_err_from_subroutine_
|
|
ch_err='PSI_dSwapTran'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
end if
|
|
|
|
end if
|
|
|
|
if (aliw) deallocate(iwork,stat=info)
|
|
if (debug_level >= psb_debug_comp_) &
|
|
& write(debug_unit,*) me,' ',trim(name),' deallocat ',aliw, info
|
|
if(info /= psb_success_) then
|
|
info = psb_err_from_subroutine_
|
|
ch_err='Deallocate iwork'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
nullify(iwork)
|
|
|
|
call psb_erractionrestore(err_act)
|
|
return
|
|
|
|
9999 call psb_error_handler(ctxt,err_act)
|
|
|
|
return
|
|
end subroutine psb_sspmm
|
|
!!$
|
|
!!$ Parallel Sparse BLAS version 3.5
|
|
!!$ (C) Copyright 2006-2018
|
|
!!$ Salvatore Filippone University of Rome Tor Vergata
|
|
!!$ Alfredo Buttari
|
|
!!$
|
|
!!$ Redistribution and use in source and binary forms, with or without
|
|
!!$ modification, are permitted provided that the following conditions
|
|
!!$ are met:
|
|
!!$ 1. Redistributions of source code must retain the above copyright
|
|
!!$ notice, this list of conditions and the following disclaimer.
|
|
!!$ 2. Redistributions in binary form must reproduce the above copyright
|
|
!!$ notice, this list of conditions, and the following disclaimer in the
|
|
!!$ documentation and/or other materials provided with the distribution.
|
|
!!$ 3. The name of the PSBLAS group or the names of its contributors may
|
|
!!$ not be used to endorse or promote products derived from this
|
|
!!$ software without specific written permission.
|
|
!!$
|
|
!!$ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
!!$ ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
|
|
!!$ TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
|
|
!!$ PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PSBLAS GROUP OR ITS CONTRIBUTORS
|
|
!!$ BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
|
|
!!$ CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
|
|
!!$ SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
|
|
!!$ INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
|
|
!!$ CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
|
|
!!$ ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
!!$ POSSIBILITY OF SUCH DAMAGE.
|
|
!!$
|
|
!!$
|
|
!
|
|
! Subroutine: psb_sspmv
|
|
! Performs one of the distributed matrix-vector operations
|
|
!
|
|
! Y := alpha * Pr * A * Pc * X + beta * Y, or
|
|
!
|
|
! Y := alpha * Pr * A' * Pr * X + beta * Y,
|
|
!
|
|
! alpha and beta are scalars, and X and Y are distributed
|
|
! vectors and A is a M-by-N distributed matrix.
|
|
!
|
|
! Arguments:
|
|
! alpha - real The scalar alpha.
|
|
! a - type(psb_sspmat_type). The sparse matrix containing A.
|
|
! x(:) - real The input vector containing the entries of ( X ).
|
|
! beta - real The scalar beta.
|
|
! y(:) - real The input vector containing the entries of ( Y ).
|
|
! desc_a - type(psb_desc_type). The communication descriptor.
|
|
! info - integer. Return code
|
|
! trans - character(optional). Whether A or A'. Default: 'N'
|
|
! work(:) - real,(optional). Working area.
|
|
! doswap - logical(optional). Whether to performe halo updates.
|
|
!
|
|
subroutine psb_sspmv(alpha,a,x,beta,y,desc_a,info,&
|
|
& trans, work, doswap)
|
|
use psb_base_mod, psb_protect_name => psb_sspmv
|
|
use psi_mod
|
|
implicit none
|
|
|
|
real(psb_spk_), intent(in) :: alpha, beta
|
|
real(psb_spk_), intent(inout), target :: x(:)
|
|
real(psb_spk_), intent(inout), target :: y(:)
|
|
type(psb_sspmat_type), intent(in) :: a
|
|
type(psb_desc_type), intent(in) :: desc_a
|
|
integer(psb_ipk_), intent(out) :: info
|
|
real(psb_spk_), optional, target, intent(inout) :: work(:)
|
|
character, intent(in), optional :: trans
|
|
logical, intent(in), optional :: doswap
|
|
|
|
! locals
|
|
type(psb_ctxt_type) :: ctxt
|
|
integer(psb_ipk_) :: np, me,&
|
|
& err_act, iix, jjx, iia, jja, nrow, ncol, lldx, lldy, &
|
|
& liwork, iiy, jjy, ib, ip, idx, ik
|
|
integer(psb_lpk_) :: ix, ijx, iy, ijy, m, n, ia, ja, lik, jx, jy
|
|
integer(psb_ipk_), parameter :: nb=4
|
|
real(psb_spk_), pointer :: iwork(:), xp(:), yp(:)
|
|
real(psb_spk_), allocatable :: xvsave(:)
|
|
character :: trans_
|
|
character(len=20) :: name, ch_err
|
|
logical :: aliw, doswap_
|
|
integer(psb_ipk_) :: debug_level, debug_unit
|
|
|
|
name='psb_sspmv'
|
|
info=psb_success_
|
|
call psb_erractionsave(err_act)
|
|
if (psb_errstatus_fatal()) then
|
|
info = psb_err_internal_error_ ; goto 9999
|
|
end if
|
|
debug_unit = psb_get_debug_unit()
|
|
debug_level = psb_get_debug_level()
|
|
|
|
ctxt=desc_a%get_context()
|
|
call psb_info(ctxt, me, np)
|
|
if (np == -1) then
|
|
info = psb_err_context_error_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
endif
|
|
|
|
ia = 1
|
|
ja = 1
|
|
ix = 1
|
|
jx = 1
|
|
iy = 1
|
|
jy = 1
|
|
ik = 1
|
|
lik = 1
|
|
ib = 1
|
|
|
|
if (present(doswap)) then
|
|
doswap_ = doswap
|
|
else
|
|
doswap_ = .true.
|
|
endif
|
|
|
|
if (present(trans)) then
|
|
trans_ = psb_toupper(trans)
|
|
else
|
|
trans_ = 'N'
|
|
endif
|
|
if ( (trans_ == 'N').or.(trans_ == 'T')&
|
|
& .or.(trans_ == 'C')) then
|
|
else
|
|
info = psb_err_iarg_invalid_value_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
m = desc_a%get_global_rows()
|
|
n = desc_a%get_global_cols()
|
|
nrow = desc_a%get_local_rows()
|
|
ncol = desc_a%get_local_cols()
|
|
lldx = size(x)
|
|
lldy = size(y)
|
|
|
|
iwork => null()
|
|
! check for presence/size of a work area
|
|
liwork= 2*ncol
|
|
|
|
if (present(work)) then
|
|
if (size(work) >= liwork) then
|
|
aliw =.false.
|
|
else
|
|
aliw=.true.
|
|
endif
|
|
else
|
|
aliw=.true.
|
|
end if
|
|
|
|
if (aliw) then
|
|
allocate(iwork(liwork),stat=info)
|
|
if(info /= psb_success_) then
|
|
info=psb_err_from_subroutine_
|
|
ch_err='Allocate'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
else
|
|
iwork => work
|
|
endif
|
|
|
|
if (debug_level >= psb_debug_comp_) &
|
|
& write(debug_unit,*) me,' ',trim(name),' Allocated work ', info
|
|
! checking for matrix correctness
|
|
call psb_chkmat(m,n,ia,ja,desc_a,info,iia,jja)
|
|
if(info /= psb_success_) then
|
|
info=psb_err_from_subroutine_
|
|
ch_err='psb_chkmat'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
|
|
if (debug_level >= psb_debug_comp_) &
|
|
& write(debug_unit,*) me,' ',trim(name),' Checkmat ', info
|
|
if (trans_ == 'N') then
|
|
! Matrix is not transposed
|
|
if((ja /= ix).or.(ia /= iy)) then
|
|
! this case is not yet implemented
|
|
info = psb_err_ja_nix_ia_niy_unsupported_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
! checking for vectors correctness
|
|
call psb_chkvect(n,lik,lldx,ix,jx,desc_a,info,iix,jjx,check_halo=.true.)
|
|
if (info == psb_success_) &
|
|
& call psb_chkvect(m,lik,lldy,iy,jy,desc_a,info,iiy,jjy)
|
|
if(info /= psb_success_) then
|
|
info=psb_err_from_subroutine_
|
|
ch_err='psb_chkvect'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
|
|
if((iix /= 1).or.(iiy /= 1)) then
|
|
! this case is not yet implemented
|
|
info = psb_err_ix_n1_iy_n1_unsupported_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
if (doswap_) then
|
|
call psi_swapdata(ior(psb_swap_send_,psb_swap_recv_),&
|
|
& szero,x,desc_a,iwork,info,data=psb_comm_halo_)
|
|
end if
|
|
|
|
call psb_csmm(alpha,a,x,beta,y,info)
|
|
|
|
if(info /= psb_success_) then
|
|
info = psb_err_from_subroutine_non_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
else
|
|
! Matrix is transposed
|
|
if((ja /= iy).or.(ia /= ix)) then
|
|
! this case is not yet implemented
|
|
info = psb_err_ja_nix_ia_niy_unsupported_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
! checking for vectors correctness
|
|
call psb_chkvect(m,lik,lldx,ix,jx,desc_a,info,iix,jjx,check_halo=.true.)
|
|
if (info == psb_success_)&
|
|
& call psb_chkvect(n,lik,lldy,iy,jy,desc_a,info,iiy,jjy,check_halo=.true.)
|
|
if(info /= psb_success_) then
|
|
info=psb_err_from_subroutine_
|
|
ch_err='psb_chkvect'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
|
|
if((iix /= 1).or.(iiy /= 1)) then
|
|
! this case is not yet implemented
|
|
info = psb_err_ix_n1_iy_n1_unsupported_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
xp => x(1:lldx)
|
|
yp => y(1:lldy)
|
|
|
|
!
|
|
! Non-empty overlap, need a buffer to hold
|
|
! the entries updated with average operator.
|
|
! Why the average? because in this way they will contribute
|
|
! with a proper scale factor (1/np) to the overall product.
|
|
!
|
|
call psi_ovrl_save(x,xvsave,desc_a,info)
|
|
if (info == psb_success_) call psi_ovrl_upd(x,desc_a,psb_avg_,info)
|
|
yp(nrow+1:ncol) = szero
|
|
|
|
! local Matrix-vector product
|
|
if (info == psb_success_) call psb_csmm(alpha,a,x,beta,y,info,trans=trans_)
|
|
|
|
if (debug_level >= psb_debug_comp_) &
|
|
& write(debug_unit,*) me,' ',trim(name),' csmm ', info
|
|
|
|
if (info == psb_success_) call psi_ovrl_restore(x,xvsave,desc_a,info)
|
|
if (info /= psb_success_) then
|
|
info = psb_err_from_subroutine_
|
|
ch_err='psb_csmm'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
|
|
if (doswap_) then
|
|
call psi_swaptran(ior(psb_swap_send_,psb_swap_recv_),&
|
|
& sone,yp,desc_a,iwork,info)
|
|
if (info == psb_success_) call psi_swapdata(ior(psb_swap_send_,psb_swap_recv_),&
|
|
& sone,yp,desc_a,iwork,info,data=psb_comm_ovr_)
|
|
|
|
if (debug_level >= psb_debug_comp_) &
|
|
& write(debug_unit,*) me,' ',trim(name),' swaptran ', info
|
|
if(info /= psb_success_) then
|
|
info = psb_err_from_subroutine_
|
|
ch_err='PSI_dSwapTran'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
end if
|
|
|
|
end if
|
|
|
|
if (aliw) deallocate(iwork,stat=info)
|
|
if (debug_level >= psb_debug_comp_) &
|
|
& write(debug_unit,*) me,' ',trim(name),' deallocat ',aliw, info
|
|
if(info /= psb_success_) then
|
|
info = psb_err_from_subroutine_
|
|
ch_err='Deallocate iwork'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
|
|
nullify(iwork)
|
|
|
|
call psb_erractionrestore(err_act)
|
|
if (debug_level >= psb_debug_comp_) then
|
|
call psb_barrier(ctxt)
|
|
write(debug_unit,*) me,' ',trim(name),' Returning '
|
|
endif
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return
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9999 call psb_error_handler(ctxt,err_act)
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return
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end subroutine psb_sspmv
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