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psblas3/base/psblas/psb_daxpby.f90

284 lines
9.1 KiB
Fortran

!!$
!!$ Parallel Sparse BLAS v2.0
!!$ (C) Copyright 2006 Salvatore Filippone University of Rome Tor Vergata
!!$ Alfredo Buttari University of Rome Tor Vergata
!!$
!!$ 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_daxpby.f90
!
! Subroutine: psb_daxpby
! Adds one distributed matrix to another,
!
! sub( Y ) := beta * sub( Y ) + alpha * sub( X )
!
! where sub( X ) denotes X(:,JX)
!
! sub( Y ) denotes Y(:,JY).
!
! Parameters:
! alpha - real. The scalar used to multiply each component of sub( X ).
! x - real,dimension(:,:). The input vector containing the entries of sub( X ).
! beta - real. The scalar used to multiply each component of sub( Y ).
! y - real,dimension(:,:). The input vector containing the entries of sub( Y ).
! desc_a - type(<psb_desc_type>). The communication descriptor.
! info - integer. Eventually returns an error code.
! jx - integer(optional). The column offset for sub( X ).
! jy - integer(optional). The column offset for sub( Y ).
!
subroutine psb_daxpby(alpha, x, beta,y,desc_a,info, n, jx, jy)
use psb_descriptor_type
use psb_check_mod
use psb_const_mod
use psb_error_mod
use psb_penv_mod
implicit none
integer, intent(in), optional :: n, jx, jy
integer, intent(out) :: info
type(psb_desc_type), intent(in) :: desc_a
real(kind(1.D0)), intent(in) :: alpha, beta
real(kind(1.D0)), intent(in) :: x(:,:)
real(kind(1.D0)), intent(inout) :: y(:,:)
! locals
integer :: ictxt, np, me,&
& err_act, iix, jjx, ix, iy, ijx, ijy, m, iiy, in, jjy
real(kind(1.d0)),pointer :: tmpx(:)
character(len=20) :: name, ch_err
name='psb_dgeaxpby'
if(psb_get_errstatus().ne.0) return
info=0
call psb_erractionsave(err_act)
ictxt=psb_cd_get_context(desc_a)
call psb_info(ictxt, me, np)
if (np == -ione) then
info = 2010
call psb_errpush(info,name)
goto 9999
endif
ix = ione
if (present(jx)) then
ijx = jx
else
ijx = ione
endif
iy = ione
if (present(jy)) then
ijy = jy
else
ijy = ione
endif
if (present(n)) then
if(((ijx+n).le.size(x,2)).and.&
& ((ijy+n).le.size(y,2))) then
in = n
else
in = min(size(x,2),size(y,2))
end if
else
in = min(size(x,2),size(y,2))
endif
if(ijx.ne.ijy) then
info=3050
call psb_errpush(info,name)
goto 9999
end if
m = psb_cd_get_global_rows(desc_a)
! check vector correctness
call psb_chkvect(m,ione,size(x,1),ix,ijx,desc_a,info,iix,jjx)
if (info == 0) &
& call psb_chkvect(m,ione,size(y,1),iy,ijy,desc_a,info,iiy,jjy)
if(info.ne.0) then
info=4010
ch_err='psb_chkvect'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
if ((iix.ne.ione).or.(iiy.ne.ione)) then
info=3040
call psb_errpush(info,name)
goto 9999
end if
if ((in.ne.0)) then
if(psb_cd_get_local_rows(desc_a).gt.0) then
call daxpby(psb_cd_get_local_rows(desc_a),in,&
& alpha,x(iix,jjx),size(x,1),beta,&
& y(iiy,jjy),size(y,1),info)
end if
end if
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act.eq.act_abort) then
call psb_error(ictxt)
return
end if
return
end subroutine psb_daxpby
!!$
!!$ Parallel Sparse BLAS v2.0
!!$ (C) Copyright 2006 Salvatore Filippone University of Rome Tor Vergata
!!$ Alfredo Buttari University of Rome Tor Vergata
!!$
!!$ 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_dgeaxpbyv
! Adds one distributed matrix to another,
!
! Y := beta * Y + alpha * X
!
! Parameters:
! alpha - real. The scalar used to multiply each component of X.
! x - real,dimension(:). The input vector containing the entries of X.
! beta - real. The scalar used to multiply each component of Y.
! y - real,dimension(:). The input vector containing the entries of Y.
! desc_a - type(<psb_desc_type>). The communication descriptor.
! info - integer. Eventually returns an error code.
!
subroutine psb_daxpbyv(alpha, x, beta,y,desc_a,info)
use psb_descriptor_type
use psb_const_mod
use psb_check_mod
use psb_error_mod
use psb_penv_mod
implicit none
integer, intent(out) :: info
type(psb_desc_type), intent(in) :: desc_a
real(kind(1.D0)), intent(in) :: alpha, beta
real(kind(1.D0)), intent(in) :: x(:)
real(kind(1.D0)), intent(inout) :: y(:)
! locals
integer :: ictxt, np, me,&
& err_act, n, iix, jjx, ix, iy, ijx, m, iiy, in, jjy
character(len=20) :: name, ch_err
logical, parameter :: debug=.false.
name='psb_dgeaxpby'
if(psb_get_errstatus().ne.0) return
info=0
call psb_erractionsave(err_act)
ictxt=psb_cd_get_context(desc_a)
call psb_info(ictxt, me, np)
if (np == -ione) then
info = 2010
call psb_errpush(info,name)
goto 9999
endif
ix = ione
iy = ione
m = psb_cd_get_global_rows(desc_a)
! check vector correctness
call psb_chkvect(m,ione,size(x),ix,ione,desc_a,info,iix,jjx)
if(info.ne.0) then
info=4010
ch_err='psb_chkvect 1'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
call psb_chkvect(m,ione,size(y),iy,ione,desc_a,info,iiy,jjy)
if(info.ne.0) then
info=4010
ch_err='psb_chkvect 2'
call psb_errpush(info,name,a_err=ch_err)
goto 9999
end if
if ((iix.ne.ione).or.(iiy.ne.ione)) then
info=3040
call psb_errpush(info,name)
end if
if(psb_cd_get_local_rows(desc_a).gt.0) then
call daxpby(psb_cd_get_local_rows(desc_a),ione,&
& alpha,x,size(x),beta,&
& y,size(y),info)
end if
call psb_erractionrestore(err_act)
return
9999 continue
call psb_erractionrestore(err_act)
if (err_act.eq.act_abort) then
call psb_error(ictxt)
return
end if
return
end subroutine psb_daxpbyv