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psblas3/base/psblas/psb_znrm2.f90

400 lines
12 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_znrm2.f90
!
! Function: psb_znrm2
! Forms the norm2 of a distributed vector,
!
! norm2 := sqrt ( sub( X )**T * sub( X ) )
!
! where sub( X ) denotes X(:,JX).
!
! Arguments:
! x(:,:) - complex The input vector containing the entries of sub( X ).
! desc_a - type(psb_desc_type). The communication descriptor.
! info - integer. Return code
! jx - integer(optional). The column offset for sub( X ).
!
function psb_znrm2(x, desc_a, info, jx)
use psb_descriptor_type
use psb_check_mod
use psb_error_mod
use psb_penv_mod
implicit none
complex(kind(1.d0)), intent(in) :: x(:,:)
type(psb_desc_type), intent(in) :: desc_a
integer, intent(in), optional :: jx
integer, intent(out) :: info
real(kind(1.D0)) :: psb_znrm2
! locals
integer :: ictxt, np, me,&
& err_act, iix, jjx, ndim, ix, ijx, i, m, id, idx, ndm
real(kind(1.d0)) :: nrm2, dznrm2, dd
external dcombnrm2
character(len=20) :: name, ch_err
name='psb_znrm2'
if(psb_get_errstatus() /= 0) return
info=0
call psb_erractionsave(err_act)
ictxt=psb_cd_get_context(desc_a)
call psb_info(ictxt, me, np)
if (np == -1) then
info = 2010
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 /= 0) then
info=4010
ch_err='psb_chkvect'
call psb_errpush(info,name,a_err=ch_err)
end if
if (iix /= 1) then
info=3040
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 = dznrm2( 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 = dble(ndm-1)/dble(ndm)
nrm2 = nrm2 * sqrt(done - dd*(abs(x(idx,jjx))/nrm2)**2)
end do
else
nrm2 = dzero
end if
else
nrm2 = dzero
end if
call pdtreecomb(ictxt,'All',1,nrm2,-1,-1,dcombnrm2)
psb_znrm2 = 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_znrm2
!!$
!!$ 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_znrm2
! Forms the norm2 of a distributed vector,
!
! norm2 := sqrt ( X**T * X)
!
! Arguments:
! x(:) - complex The input vector containing the entries of X.
! desc_a - type(psb_desc_type). The communication descriptor.
! info - integer. Return code
!
function psb_znrm2v(x, desc_a, info)
use psb_descriptor_type
use psb_check_mod
use psb_error_mod
use psb_penv_mod
implicit none
complex(kind(1.d0)), intent(in) :: x(:)
type(psb_desc_type), intent(in) :: desc_a
integer, intent(out) :: info
real(kind(1.D0)) :: psb_znrm2v
! locals
integer :: ictxt, np, me,&
& err_act, iix, jjx, ndim, ix, jx, i, m, id, idx, ndm
real(kind(1.d0)) :: nrm2, dznrm2, dd
external dcombnrm2
character(len=20) :: name, ch_err
name='psb_znrm2v'
if(psb_get_errstatus() /= 0) return
info=0
call psb_erractionsave(err_act)
ictxt=psb_cd_get_context(desc_a)
call psb_info(ictxt, me, np)
if (np == -1) then
info = 2010
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 /= 0) then
info=4010
ch_err='psb_chkvect'
call psb_errpush(info,name,a_err=ch_err)
end if
if (iix /= 1) then
info=3040
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 = dznrm2( 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 = dble(ndm-1)/dble(ndm)
nrm2 = nrm2 * sqrt(done - dd*(abs(x(idx))/nrm2)**2)
end do
else
nrm2 = dzero
end if
else
nrm2 = dzero
end if
call pdtreecomb(ictxt,'All',1,nrm2,-1,-1,dcombnrm2)
psb_znrm2v = 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_znrm2v
!!$
!!$ 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_znrm2vs
! Forms the norm2 of a distributed vector,
!
! norm2 := sqrt ( X**T * X)
!
! Arguments:
! res - real The result.
! x(:) - complex The input vector containing the entries of X.
! desc_a - type(psb_desc_type). The communication descriptor.
! info - integer. Return code
!
subroutine psb_znrm2vs(res, x, desc_a, info)
use psb_descriptor_type
use psb_check_mod
use psb_error_mod
use psb_penv_mod
implicit none
complex(kind(1.d0)), intent(in) :: x(:)
real(kind(1.d0)), 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(kind(1.d0)) :: nrm2, dznrm2, dd
external dcombnrm2
character(len=20) :: name, ch_err
name='psb_znrm2'
if(psb_get_errstatus() /= 0) return
info=0
call psb_erractionsave(err_act)
ictxt=psb_cd_get_context(desc_a)
call psb_info(ictxt, me, np)
if (np == -1) then
info = 2010
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 /= 0) then
info=4010
ch_err='psb_chkvect'
call psb_errpush(info,name,a_err=ch_err)
end if
if (iix /= 1) then
info=3040
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 = dznrm2( 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 = dble(ndm-1)/dble(ndm)
nrm2 = nrm2 * sqrt(done - dd*(abs(x(idx))/nrm2)**2)
end do
else
nrm2 = dzero
end if
else
nrm2 = dzero
end if
call pdtreecomb(ictxt,'All',1,nrm2,-1,-1,dcombnrm2)
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_znrm2vs