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373 lines
9.4 KiB
Fortran
373 lines
9.4 KiB
Fortran
1 year ago
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! Parallel Sparse BLAS GPU plugin
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! (C) Copyright 2013
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!
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! Salvatore Filippone
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! Alessandro Fanfarillo
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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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subroutine psb_z_ell_cssv(alpha,a,x,beta,y,info,trans)
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use psb_base_mod
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use psb_z_ell_mat_mod, psb_protect_name => psb_z_ell_cssv
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implicit none
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class(psb_z_ell_sparse_mat), intent(in) :: a
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complex(psb_dpk_), intent(in) :: alpha, beta, x(:)
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complex(psb_dpk_), intent(inout) :: y(:)
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integer(psb_ipk_), intent(out) :: info
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character, optional, intent(in) :: trans
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character :: trans_
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integer(psb_ipk_) :: i,j,k,m,n, nnz, ir, jc
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complex(psb_dpk_) :: acc
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complex(psb_dpk_), allocatable :: tmp(:)
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logical :: tra, ctra
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Integer(Psb_ipk_) :: err_act
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character(len=20) :: name='z_ell_cssv'
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logical, parameter :: debug=.false.
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info = psb_success_
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call psb_erractionsave(err_act)
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if (present(trans)) then
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trans_ = trans
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else
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trans_ = 'N'
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end if
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if (.not.a%is_asb()) then
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info = psb_err_invalid_mat_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 (a%is_dev()) call a%sync()
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tra = (psb_toupper(trans_) == 'T')
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ctra = (psb_toupper(trans_) == 'C')
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m = a%get_nrows()
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if (.not. (a%is_triangle().and.a%is_sorted())) then
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info = psb_err_invalid_mat_state_
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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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if (size(x,1)<m) then
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info = 36
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call psb_errpush(info,name,i_err=(/3*ione,m/))
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goto 9999
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end if
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if (size(y,1)<m) then
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info = 36
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call psb_errpush(info,name,i_err=(/5*ione,m/))
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goto 9999
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end if
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if (alpha == zzero) then
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if (beta == zzero) then
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do i = 1, m
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y(i) = zzero
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enddo
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else
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do i = 1, m
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y(i) = beta*y(i)
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end do
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endif
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return
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end if
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if (beta == zzero) then
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!!$ write(0,*) 'Into ell_sv',tra,a%is_lower(),a%is_unit(),x(1:m)
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call inner_ellsv(tra,ctra,a%is_lower(),a%is_unit(),a%get_nrows(),&
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& size(a%ja,2,kind=psb_ipk_),a%irn,a%idiag,&
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& a%ja,size(a%ja,1,kind=psb_ipk_),a%val,size(a%val,1,kind=psb_ipk_),&
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& x,y,info)
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if (info /= 0) then
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info = psb_err_invalid_mat_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 (alpha == zone) then
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! do nothing
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else if (alpha == -zone) then
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do i = 1, m
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y(i) = -y(i)
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end do
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else
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do i = 1, m
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y(i) = alpha*y(i)
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end do
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end if
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!!$ write(0,*) 'Out from ell_sv',tra,a%is_lower(),a%is_unit(),y(1:m)
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else
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allocate(tmp(m), stat=info)
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if (info /= psb_success_) then
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info = psb_err_alloc_dealloc_
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call psb_errpush(info,name)
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goto 9999
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endif
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call inner_ellsv(tra,ctra,a%is_lower(),a%is_unit(),a%get_nrows(),&
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& size(a%ja,2,kind=psb_ipk_),a%irn,a%idiag,&
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& a%ja,size(a%ja,1,kind=psb_ipk_),a%val,size(a%val,1,kind=psb_ipk_),&
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& x,tmp,info)
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if (info == 0) &
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& call psb_geaxpby(m,alpha,tmp,beta,y,info)
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if (info /= 0) then
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info = psb_err_invalid_mat_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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end if
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call psb_erractionrestore(err_act)
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return
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9999 call psb_error_handler(err_act)
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return
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contains
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subroutine inner_ellsv(tra,ctra,lower,unit,n,nc,irn,idiag,ja,ldj,val,ldv,x,y,info)
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implicit none
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logical, intent(in) :: tra,ctra,lower,unit
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integer(psb_ipk_), intent(in) :: n,nc,ldj,ldv
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integer(psb_ipk_), intent(in) :: irn(*),idiag(*), ja(ldj,*)
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complex(psb_dpk_), intent(in) :: val(ldv,*)
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complex(psb_dpk_), intent(in) :: x(*)
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complex(psb_dpk_), intent(out) :: y(*)
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integer(psb_ipk_), intent(out) :: info
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integer(psb_ipk_) :: i,j,k,m, ir, jc
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complex(psb_dpk_) :: acc
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!
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! The only error condition here is if
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! the matrix is non-unit and some idiag value is illegal.
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!
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info = 0
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if (.not.(tra.or.ctra)) then
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if (lower) then
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if (unit) then
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do i=1, n
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acc = zzero
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do j=1,irn(i)
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acc = acc + val(i,j)*y(ja(i,j))
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end do
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y(i) = x(i) - acc
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end do
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else if (.not.unit) then
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do i=1, n
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acc = zzero
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do j=1,idiag(i)-1
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acc = acc + val(i,j)*y(ja(i,j))
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end do
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if (idiag(i) <= 0) then
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info = -1
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return
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endif
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y(i) = (x(i) - acc)/val(i,idiag(i))
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end do
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end if
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else if (.not.lower) then
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if (unit) then
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do i=n, 1, -1
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acc = zzero
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do j=1,irn(i)
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acc = acc + val(i,j)*y(ja(i,j))
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end do
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y(i) = x(i) - acc
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end do
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else if (.not.unit) then
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do i=n, 1, -1
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acc = zzero
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do j=idiag(i)+1, irn(i)
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acc = acc + val(i,j)*y(ja(i,j))
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end do
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if (idiag(i) <= 0) then
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info = -1
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return
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endif
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y(i) = (x(i) - acc)/val(i,idiag(i))
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end do
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end if
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end if
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else if (tra) then
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do i=1, n
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y(i) = x(i)
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end do
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if (lower) then
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if (unit) then
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do i=n, 1, -1
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acc = y(i)
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do j=1,irn(i)
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jc = ja(i,j)
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y(jc) = y(jc) - val(i,j)*acc
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end do
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end do
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else if (.not.unit) then
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do i=n, 1, -1
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if (idiag(i) <= 0) then
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info = -1
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return
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endif
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y(i) = y(i)/val(i,idiag(i))
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acc = y(i)
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do j=1,idiag(i)-1
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jc = ja(i,j)
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y(jc) = y(jc) - val(i,j)*acc
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end do
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end do
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end if
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else if (.not.lower) then
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if (unit) then
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do i=1, n
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acc = y(i)
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do j=1, irn(i)
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jc = ja(i,j)
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y(jc) = y(jc) - val(i,j)*acc
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end do
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end do
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else if (.not.unit) then
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do i=1, n
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if (idiag(i) <= 0) then
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info = -1
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return
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endif
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y(i) = y(i)/val(i,idiag(i))
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acc = y(i)
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do j=idiag(i)+1, irn(i)
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jc = ja(i,j)
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y(jc) = y(jc) - val(i,j)*acc
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end do
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end do
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end if
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end if
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else if (ctra) then
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do i=1, n
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y(i) = x(i)
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end do
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if (lower) then
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if (unit) then
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do i=n, 1, -1
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acc = y(i)
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do j=1,irn(i)
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jc = ja(i,j)
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y(jc) = y(jc) - conjg(val(i,j))*acc
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end do
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end do
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else if (.not.unit) then
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do i=n, 1, -1
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if (idiag(i) <= 0) then
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info = -1
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return
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endif
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y(i) = y(i)/conjg(val(i,idiag(i)))
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acc = y(i)
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do j=1,idiag(i)-1
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jc = ja(i,j)
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y(jc) = y(jc) - conjg(val(i,j))*acc
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end do
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end do
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end if
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else if (.not.lower) then
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if (unit) then
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do i=1, n
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acc = y(i)
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do j=1, irn(i)
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jc = ja(i,j)
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y(jc) = y(jc) - conjg(val(i,j))*acc
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end do
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end do
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else if (.not.unit) then
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do i=1, n
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if (idiag(i) <= 0) then
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info = -1
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return
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endif
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y(i) = y(i)/conjg(val(i,idiag(i)))
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acc = y(i)
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do j=idiag(i)+1, irn(i)
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jc = ja(i,j)
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y(jc) = y(jc) - conjg(val(i,j))*acc
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end do
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end do
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end if
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end if
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end if
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end subroutine inner_ellsv
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end subroutine psb_z_ell_cssv
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