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psblas3/base/psblas/psb_sspmm.f90

923 lines
28 KiB
Fortran

!
! Parallel Sparse BLAS version 3.5
! (C) Copyright 2006-2018
! Salvatore Filippone
! 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.
!
!
! File: psb_sspmm.f90
!
!
! Subroutine: psb_sspm_vect
! 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, 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 - type(psb_s_vect_type) The input vector containing the entries of ( X ).
! beta - real The scalar beta.
! y - type(psb_s_vect_type) 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_vect(alpha,a,x,beta,y,desc_a,info,&
& trans, work, doswap)
use psb_base_mod, psb_protect_name => psb_sspmv_vect
use psi_mod
implicit none
real(psb_spk_), intent(in) :: alpha, beta
type(psb_s_vect_type), intent(inout) :: x
type(psb_s_vect_type), intent(inout) :: 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
integer(psb_lpk_) :: ix, ijx, iy, ijy, m, n, ia, ja
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
if (.not.allocated(x%v)) then
info = psb_err_invalid_vect_state_
call psb_errpush(info,name)
goto 9999
endif
if (.not.allocated(y%v)) then
info = psb_err_invalid_vect_state_
call psb_errpush(info,name)
goto 9999
endif
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 = x%get_nrows()
lldy = y%get_nrows()
if ((info == 0).and.(lldx<ncol)) call x%reall(ncol,info)
if ((info == 0).and.(lldy<ncol)) call y%reall(ncol,info)
if (psb_errstatus_fatal()) then
info=psb_err_from_subroutine_
ch_err='reall'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
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
if (trans_ == 'N') then
! Matrix is not transposed
if (allocated(a%ad)) then
block
logical, parameter :: do_timings=.true.
real(psb_dpk_) :: t1, t2, t3, t4, t5
if (do_timings) call psb_barrier(ctxt)
if (do_timings) t1= psb_wtime()
if (doswap_) call psi_swapdata(psb_swap_send_,&
& szero,x%v,desc_a,iwork,info,data=psb_comm_halo_)
if (do_timings) t2= psb_wtime()
call a%ad%spmm(alpha,x%v,beta,y%v,info)
if (do_timings) t3= psb_wtime()
if (doswap_) call psi_swapdata(psb_swap_recv_,&
& szero,x%v,desc_a,iwork,info,data=psb_comm_halo_)
if (do_timings) t4= psb_wtime()
call a%and%spmm(alpha,x%v,sone,y%v,info)
if (do_timings) t5= psb_wtime()
if (do_timings) write(0,*) me,' SPMM:',t2-t1,t3-t2,t4-t3,t5-t4
end block
else
if (doswap_) then
call psi_swapdata(ior(psb_swap_send_,psb_swap_recv_),&
& szero,x%v,desc_a,iwork,info,data=psb_comm_halo_)
end if
call psb_csmm(alpha,a,x,beta,y,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
!
! 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%v,xvsave,desc_a,info)
if (info == psb_success_) call psi_ovrl_upd(x%v,desc_a,psb_avg_,info)
if (beta /= szero) call y%set(szero,nrow+1,ncol)
! 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%v,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,y%v,desc_a,iwork,info)
if (info == psb_success_) call psi_swapdata(ior(psb_swap_send_,psb_swap_recv_),&
& sone,y%v,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_SwapTran'
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
return
9999 call psb_error_handler(ctxt,err_act)
return
end subroutine psb_sspmv_vect
!
! Subroutine: psb_sspmm
! Performs one of the distributed matrix-vector operations
!
! sub( Y ) := alpha * Pr * A * Pc * sub( X ) + beta * sub( Y ), or
!
! sub( Y ) := alpha * Pr * A' * Pr * sub( X ) + beta * sub( Y ),
!
! where:
!
! sub( X ) denotes: X(1:N,JX:JX+K-1),
!
! sub( Y ) denotes: Y(1:M,JY:JY+K-1),
!
! alpha and beta are scalars, and sub( X ) and sub( 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'
! k - integer(optional). The number of right-hand sides.
! jx - integer(optional). The column offset for ( X ). Default: 1
! jy - integer(optional). The column offset for ( Y ). Default: 1
! work(:) - real,(optional). Working area.
! doswap - logical(optional). Whether to performe halo updates.
!
subroutine psb_sspmm(alpha,a,x,beta,y,desc_a,info,&
& 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(:,:)
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
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
return
9999 call psb_error_handler(ctxt,err_act)
return
end subroutine psb_sspmv