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136 lines
4.2 KiB
Fortran
136 lines
4.2 KiB
Fortran
!!$
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!!$ Parallel Sparse BLAS version 2.2
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!!$ (C) Copyright 2006/2007/2008
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!!$ Salvatore Filippone University of Rome Tor Vergata
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!!$ Alfredo Buttari University of Rome Tor Vergata
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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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subroutine psb_dgprec_aply(alpha,prec,x,beta,y,desc_data,trans,work,info)
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!
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! Compute Y <- beta*Y + alpha*K^-1 X
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! where K is a a basic preconditioner stored in prec
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!
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use psb_base_mod
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use psb_prec_mod, psb_protect_name => psb_dgprec_aply
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implicit none
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type(psb_desc_type),intent(in) :: desc_data
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type(psb_dprec_type), intent(in) :: prec
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real(kind(0.d0)),intent(in) :: x(:)
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real(kind(0.d0)),intent(inout) :: y(:)
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real(kind(0.d0)),intent(in) :: alpha,beta
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character(len=1) :: trans
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real(kind(0.d0)),target :: work(:)
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integer, intent(out) :: info
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! Local variables
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integer :: n_row,int_err(5)
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real(kind(1.d0)), pointer :: ww(:)
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character :: trans_
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integer :: ictxt,np,me, err_act
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character(len=20) :: name, ch_err
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name='psb_dgprec_aply'
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info = 0
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call psb_erractionsave(err_act)
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ictxt=desc_data%matrix_data(psb_ctxt_)
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call psb_info(ictxt, me, np)
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trans_ = toupper(trans)
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select case(trans_)
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case('N')
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case('T','C')
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case default
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info=40
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int_err(1)=6
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ch_err(2:2)=trans
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goto 9999
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end select
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select case(prec%iprcparm(psb_p_type_))
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case(psb_noprec_)
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call psb_geaxpby(alpha,x,beta,y,desc_data,info)
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case(psb_diag_)
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if (size(work) >= size(x)) then
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ww => work
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else
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allocate(ww(size(x)),stat=info)
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if (info /= 0) then
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call psb_errpush(4010,name,a_err='Allocate')
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goto 9999
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end if
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end if
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n_row=desc_data%matrix_data(psb_n_row_)
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ww(1:n_row) = x(1:n_row)*prec%d(1:n_row)
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call psb_geaxpby(alpha,ww,beta,y,desc_data,info)
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if (size(work) < size(x)) then
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deallocate(ww,stat=info)
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if (info /= 0) then
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call psb_errpush(4010,name,a_err='Deallocate')
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goto 9999
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end if
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end if
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case(psb_bjac_)
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call psb_bjac_aply(alpha,prec,x,beta,y,desc_data,trans_,work,info)
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if(info /= 0) then
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info=4010
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ch_err='psb_bjac_aply'
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goto 9999
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end if
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case default
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info = 4001
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call psb_errpush(info,name,a_err='Invalid prectype')
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goto 9999
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end select
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call psb_erractionrestore(err_act)
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return
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9999 continue
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call psb_errpush(info,name,i_err=int_err,a_err=ch_err)
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call psb_erractionrestore(err_act)
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if (err_act == psb_act_abort_) then
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call psb_error()
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return
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end if
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return
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end subroutine psb_dgprec_aply
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