You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
400 lines
13 KiB
Fortran
400 lines
13 KiB
Fortran
!!$
|
|
!!$ Parallel Sparse BLAS version 2.2
|
|
!!$ (C) Copyright 2006/2007/2008
|
|
!!$ 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_snrm2.f90
|
|
!
|
|
! Function: psb_snrm2
|
|
! Forms the norm2 of a distributed vector,
|
|
!
|
|
! norm2 := sqrt ( sub( X )**T * sub( X ) )
|
|
!
|
|
! where sub( X ) denotes X(:,JX).
|
|
!
|
|
! Arguments:
|
|
! x - real,dimension(:,:). The input vector containing the entries of X.
|
|
! desc_a - type(psb_desc_type). The communication descriptor.
|
|
! info - integer. Return code
|
|
! jx - integer(optional). The column offset for X .
|
|
!
|
|
function psb_snrm2(x, desc_a, info, jx)
|
|
use psb_descriptor_type
|
|
use psb_check_mod
|
|
use psb_error_mod
|
|
use psb_penv_mod
|
|
implicit none
|
|
|
|
real(psb_spk_), intent(in) :: x(:,:)
|
|
type(psb_desc_type), intent(in) :: desc_a
|
|
integer, intent(in), optional :: jx
|
|
integer, intent(out) :: info
|
|
real(psb_spk_) :: psb_snrm2
|
|
|
|
! locals
|
|
integer :: ictxt, np, me,&
|
|
& err_act, iix, jjx, ndim, ix, ijx, i, m, id, idx, ndm
|
|
real(psb_spk_) :: nrm2, snrm2, dd
|
|
!!$ external scombnrm2
|
|
character(len=20) :: name, ch_err
|
|
|
|
name='psb_snrm2'
|
|
if(psb_get_errstatus() /= 0) return
|
|
info=psb_success_
|
|
call psb_erractionsave(err_act)
|
|
|
|
ictxt=psb_cd_get_context(desc_a)
|
|
|
|
call psb_info(ictxt, me, np)
|
|
if (np == -1) then
|
|
info=psb_err_blacs_error_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
endif
|
|
|
|
ix = 1
|
|
if (present(jx)) then
|
|
ijx = jx
|
|
else
|
|
ijx = 1
|
|
endif
|
|
|
|
m = psb_cd_get_global_rows(desc_a)
|
|
call psb_chkvect(m,1,size(x,1),ix,ijx,desc_a,info,iix,jjx)
|
|
if(info /= psb_success_) then
|
|
info=psb_err_from_subroutine_
|
|
ch_err='psb_chkvect'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
end if
|
|
|
|
if (iix /= 1) then
|
|
info=psb_err_ix_n1_iy_n1_unsupported_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
if(m /= 0) then
|
|
if (psb_cd_get_local_rows(desc_a) > 0) then
|
|
ndim = psb_cd_get_local_rows(desc_a)
|
|
nrm2 = snrm2( ndim, x(iix:,jjx), ione )
|
|
|
|
! adjust because overlapped elements are computed more than once
|
|
do i=1,size(desc_a%ovrlap_elem,1)
|
|
idx = desc_a%ovrlap_elem(i,1)
|
|
ndm = desc_a%ovrlap_elem(i,2)
|
|
dd = real(ndm-1)/real(ndm)
|
|
nrm2 = nrm2 * sqrt(sone - dd*(abs(x(idx,jjx))/nrm2)**2)
|
|
end do
|
|
else
|
|
nrm2 = szero
|
|
end if
|
|
else
|
|
nrm2 = szero
|
|
end if
|
|
|
|
!!$ call pstreecomb(ictxt,'All',1,nrm2,-1,-1,scombnrm2)
|
|
call psb_nrm2(ictxt,nrm2)
|
|
|
|
psb_snrm2 = nrm2
|
|
|
|
call psb_erractionrestore(err_act)
|
|
return
|
|
|
|
9999 continue
|
|
call psb_erractionrestore(err_act)
|
|
|
|
if (err_act == psb_act_abort_) then
|
|
call psb_error(ictxt)
|
|
return
|
|
end if
|
|
return
|
|
end function psb_snrm2
|
|
|
|
|
|
|
|
!!$
|
|
!!$ Parallel Sparse BLAS version 2.2
|
|
!!$ (C) Copyright 2006/2007/2008
|
|
!!$ 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.
|
|
!!$
|
|
!!$
|
|
!
|
|
! Function: psb_snrm2
|
|
! Forms the norm2 of a distributed vector,
|
|
!
|
|
! norm2 := sqrt ( X**T * X)
|
|
!
|
|
! Arguments:
|
|
! x - real,dimension(:). The input vector containing the entries of X.
|
|
! desc_a - type(psb_desc_type). The communication descriptor.
|
|
! info - integer. Return code
|
|
!
|
|
function psb_snrm2v(x, desc_a, info)
|
|
use psb_descriptor_type
|
|
use psb_check_mod
|
|
use psb_error_mod
|
|
use psb_penv_mod
|
|
implicit none
|
|
|
|
real(psb_spk_), intent(in) :: x(:)
|
|
type(psb_desc_type), intent(in) :: desc_a
|
|
integer, intent(out) :: info
|
|
real(psb_spk_) :: psb_snrm2v
|
|
|
|
! locals
|
|
integer :: ictxt, np, me,&
|
|
& err_act, iix, jjx, ndim, ix, jx, i, m, id, idx, ndm
|
|
real(psb_spk_) :: nrm2, snrm2, dd
|
|
!!$ external scombnrm2
|
|
character(len=20) :: name, ch_err
|
|
|
|
name='psb_snrm2v'
|
|
if(psb_get_errstatus() /= 0) return
|
|
info=psb_success_
|
|
call psb_erractionsave(err_act)
|
|
|
|
ictxt=psb_cd_get_context(desc_a)
|
|
|
|
call psb_info(ictxt, me, np)
|
|
if (np == -1) then
|
|
info=psb_err_blacs_error_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
endif
|
|
|
|
ix = 1
|
|
jx=1
|
|
m = psb_cd_get_global_rows(desc_a)
|
|
|
|
call psb_chkvect(m,1,size(x),ix,jx,desc_a,info,iix,jjx)
|
|
if(info /= psb_success_) then
|
|
info=psb_err_from_subroutine_
|
|
ch_err='psb_chkvect'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
end if
|
|
|
|
if (iix /= 1) then
|
|
info=psb_err_ix_n1_iy_n1_unsupported_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
if(m /= 0) then
|
|
if (psb_cd_get_local_rows(desc_a) > 0) then
|
|
ndim = psb_cd_get_local_rows(desc_a)
|
|
nrm2 = snrm2( ndim, x, ione )
|
|
! adjust because overlapped elements are computed more than once
|
|
do i=1,size(desc_a%ovrlap_elem,1)
|
|
idx = desc_a%ovrlap_elem(i,1)
|
|
ndm = desc_a%ovrlap_elem(i,2)
|
|
dd = real(ndm-1)/real(ndm)
|
|
nrm2 = nrm2 * sqrt(sone - dd*(abs(x(idx))/nrm2)**2)
|
|
end do
|
|
else
|
|
nrm2 = szero
|
|
end if
|
|
else
|
|
nrm2 = szero
|
|
end if
|
|
|
|
!!$ call pstreecomb(ictxt,'All',1,nrm2,-1,-1,scombnrm2)
|
|
call psb_nrm2(ictxt,nrm2)
|
|
|
|
psb_snrm2v = nrm2
|
|
|
|
call psb_erractionrestore(err_act)
|
|
return
|
|
|
|
9999 continue
|
|
call psb_erractionrestore(err_act)
|
|
|
|
if (err_act == psb_act_abort_) then
|
|
call psb_error(ictxt)
|
|
return
|
|
end if
|
|
return
|
|
end function psb_snrm2v
|
|
|
|
|
|
|
|
|
|
!!$
|
|
!!$ Parallel Sparse BLAS version 2.2
|
|
!!$ (C) Copyright 2006/2007/2008
|
|
!!$ 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_snrm2vs
|
|
! Forms the norm2 of a distributed vector,
|
|
!
|
|
! res := sqrt ( X**T * X)
|
|
!
|
|
! Arguments:
|
|
! res - real. The result.
|
|
! x - real,dimension(:). The input vector containing the entries of X.
|
|
! desc_a - type(psb_desc_type). The communication descriptor.
|
|
! info - integer. Return code
|
|
!
|
|
subroutine psb_snrm2vs(res, x, desc_a, info)
|
|
use psb_descriptor_type
|
|
use psb_check_mod
|
|
use psb_error_mod
|
|
use psb_penv_mod
|
|
implicit none
|
|
|
|
real(psb_spk_), intent(in) :: x(:)
|
|
real(psb_spk_), intent(out) :: res
|
|
type(psb_desc_type), intent(in) :: desc_a
|
|
integer, intent(out) :: info
|
|
|
|
! locals
|
|
integer :: ictxt, np, me,&
|
|
& err_act, iix, jjx, ndim, ix, jx, i, m, id, idx, ndm
|
|
real(psb_spk_) :: nrm2, snrm2, dd
|
|
!!$ external scombnrm2
|
|
character(len=20) :: name, ch_err
|
|
|
|
name='psb_snrm2'
|
|
if(psb_get_errstatus() /= 0) return
|
|
info=psb_success_
|
|
call psb_erractionsave(err_act)
|
|
|
|
ictxt=psb_cd_get_context(desc_a)
|
|
|
|
call psb_info(ictxt, me, np)
|
|
if (np == -1) then
|
|
info=psb_err_blacs_error_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
endif
|
|
|
|
ix = 1
|
|
jx = 1
|
|
m = psb_cd_get_global_rows(desc_a)
|
|
|
|
call psb_chkvect(m,1,size(x),ix,jx,desc_a,info,iix,jjx)
|
|
if(info /= psb_success_) then
|
|
info=psb_err_from_subroutine_
|
|
ch_err='psb_chkvect'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
end if
|
|
|
|
if (iix /= 1) then
|
|
info=psb_err_ix_n1_iy_n1_unsupported_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
if(m /= 0) then
|
|
if (psb_cd_get_local_rows(desc_a) > 0) then
|
|
ndim = psb_cd_get_local_rows(desc_a)
|
|
nrm2 = snrm2( ndim, x, ione )
|
|
! adjust because overlapped elements are computed more than once
|
|
do i=1,size(desc_a%ovrlap_elem,1)
|
|
idx = desc_a%ovrlap_elem(i,1)
|
|
ndm = desc_a%ovrlap_elem(i,2)
|
|
dd = real(ndm-1)/real(ndm)
|
|
nrm2 = nrm2 * sqrt(sone - dd*(abs(x(idx))/nrm2)**2)
|
|
end do
|
|
else
|
|
nrm2 = szero
|
|
end if
|
|
else
|
|
nrm2 = szero
|
|
end if
|
|
|
|
!!$ call pstreecomb(ictxt,'All',1,nrm2,-1,-1,scombnrm2)
|
|
call psb_nrm2(ictxt,nrm2)
|
|
|
|
res = nrm2
|
|
|
|
call psb_erractionrestore(err_act)
|
|
return
|
|
|
|
9999 continue
|
|
call psb_erractionrestore(err_act)
|
|
|
|
if (err_act == psb_act_abort_) then
|
|
call psb_error(ictxt)
|
|
return
|
|
end if
|
|
return
|
|
end subroutine psb_snrm2vs
|