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psblas3/base/psblas/psb_cnrm2.f90

452 lines
14 KiB
Fortran

!!$
!!$ Parallel Sparse BLAS version 3.4
!!$ (C) Copyright 2006, 2010, 2015
!!$ Salvatore Filippone University of Rome Tor Vergata
!!$ Alfredo Buttari CNRS-IRIT, Toulouse
!!$
!!$ 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_cnrm2.f90
!
! Function: psb_cnrm2
! 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_cnrm2(x, desc_a, info, jx) result(res)
use psb_desc_mod
use psb_check_mod
use psb_error_mod
use psb_penv_mod
implicit none
complex(psb_spk_), intent(in) :: x(:,:)
type(psb_desc_type), intent(in) :: desc_a
integer(psb_ipk_), intent(in), optional :: jx
integer(psb_ipk_), intent(out) :: info
real(psb_spk_) :: res
! locals
integer(psb_ipk_) :: ictxt, np, me,&
& err_act, iix, jjx, ndim, ix, ijx, i, m, id, idx, ndm, ldx
real(psb_spk_) :: scnrm2, dd
character(len=20) :: name, ch_err
name='psb_cnrm2'
if(psb_get_errstatus() /= 0) return
info=psb_success_
call psb_erractionsave(err_act)
ictxt=desc_a%get_context()
call psb_info(ictxt, me, np)
if (np == -1) then
info=psb_err_context_error_
call psb_errpush(info,name)
goto 9999
endif
ix = 1
if (present(jx)) then
ijx = jx
else
ijx = 1
endif
m = desc_a%get_global_rows()
ldx = size(x,1)
call psb_chkvect(m,ione,ldx,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 (desc_a%get_local_rows() > 0) then
ndim = desc_a%get_local_rows()
res = scnrm2( int(ndim,kind=psb_mpik_), x(iix:,jjx), int(ione,kind=psb_mpik_) )
! 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)
res = res * sqrt(sone - dd*(abs(x(idx,jjx))/res)**2)
end do
else
res = szero
end if
call psb_nrm2(ictxt,res)
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(ictxt,err_act)
return
end function psb_cnrm2
!!$
!!$ Parallel Sparse BLAS version 3.4
!!$ (C) Copyright 2006, 2010, 2015
!!$ Salvatore Filippone University of Rome Tor Vergata
!!$ Alfredo Buttari CNRS-IRIT, Toulouse
!!$
!!$ 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_cnrm2
! 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_cnrm2v(x, desc_a, info) result(res)
use psb_desc_mod
use psb_check_mod
use psb_error_mod
use psb_penv_mod
implicit none
complex(psb_spk_), intent(in) :: x(:)
type(psb_desc_type), intent(in) :: desc_a
integer(psb_ipk_), intent(out) :: info
real(psb_spk_) :: res
! locals
integer(psb_ipk_) :: ictxt, np, me,&
& err_act, iix, jjx, ndim, ix, jx, i, m, id, idx, ndm, ldx
real(psb_spk_) :: scnrm2, dd
!!$ external scombnrm2
character(len=20) :: name, ch_err
name='psb_cnrm2v'
if(psb_get_errstatus() /= 0) return
info=psb_success_
call psb_erractionsave(err_act)
ictxt=desc_a%get_context()
call psb_info(ictxt, me, np)
if (np == -1) then
info=psb_err_context_error_
call psb_errpush(info,name)
goto 9999
endif
ix = 1
jx=1
m = desc_a%get_global_rows()
ldx = size(x,1)
call psb_chkvect(m,ione,ldx,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 (desc_a%get_local_rows() > 0) then
ndim = desc_a%get_local_rows()
res = scnrm2( int(ndim,kind=psb_mpik_), x, int(ione,kind=psb_mpik_) )
! 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)
res = res * sqrt(sone - dd*(abs(x(idx))/res)**2)
end do
else
res = szero
end if
call psb_nrm2(ictxt,res)
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(ictxt,err_act)
return
end function psb_cnrm2v
function psb_cnrm2_vect(x, desc_a, info) result(res)
use psb_desc_mod
use psb_check_mod
use psb_error_mod
use psb_penv_mod
use psb_c_vect_mod
implicit none
real(psb_spk_) :: res
type(psb_c_vect_type), intent (inout) :: x
type(psb_desc_type), intent(in) :: desc_a
integer(psb_ipk_), intent(out) :: info
! locals
integer(psb_ipk_) :: ictxt, np, me,&
& err_act, iix, jjx, ndim, ix, jx, i, m, id, idx, ndm, ldx
real(psb_spk_) :: snrm2, dd
!!$ external dcombnrm2
character(len=20) :: name, ch_err
name='psb_cnrm2v'
if (psb_errstatus_fatal()) return
info=psb_success_
call psb_erractionsave(err_act)
ictxt=desc_a%get_context()
call psb_info(ictxt, me, np)
if (np == -1) then
info=psb_err_context_error_
call psb_errpush(info,name)
goto 9999
endif
if (.not.allocated(x%v)) then
info = psb_err_invalid_vect_state_
call psb_errpush(info,name)
goto 9999
endif
ix = 1
jx=1
m = desc_a%get_global_rows()
ldx = x%get_nrows()
call psb_chkvect(m,ione,ldx,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 (desc_a%get_local_rows() > 0) then
ndim = desc_a%get_local_rows()
res = x%nrm2(ndim)
!!$ ! 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
res = szero
end if
call psb_nrm2(ictxt,res)
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(ictxt,err_act)
return
end function psb_cnrm2_vect
!!$
!!$ Parallel Sparse BLAS version 3.4
!!$ (C) Copyright 2006, 2010, 2015
!!$ Salvatore Filippone University of Rome Tor Vergata
!!$ Alfredo Buttari CNRS-IRIT, Toulouse
!!$
!!$ 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_cnrm2vs
! 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_cnrm2vs(res, x, desc_a, info)
use psb_desc_mod
use psb_check_mod
use psb_error_mod
use psb_penv_mod
implicit none
complex(psb_spk_), intent(in) :: x(:)
real(psb_spk_), intent(out) :: res
type(psb_desc_type), intent(in) :: desc_a
integer(psb_ipk_), intent(out) :: info
! locals
integer(psb_ipk_) :: ictxt, np, me,&
& err_act, iix, jjx, ndim, ix, jx, i, m, id, idx, ndm, ldx
real(psb_spk_) :: nrm2, scnrm2, dd
!!$ external scombnrm2
character(len=20) :: name, ch_err
name='psb_cnrm2'
if(psb_get_errstatus() /= 0) return
info=psb_success_
call psb_erractionsave(err_act)
ictxt=desc_a%get_context()
call psb_info(ictxt, me, np)
if (np == -1) then
info=psb_err_context_error_
call psb_errpush(info,name)
goto 9999
endif
ix = 1
jx = 1
m = desc_a%get_global_rows()
ldx = size(x,1)
call psb_chkvect(m,ione,ldx,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 (desc_a%get_local_rows() > 0) then
ndim = desc_a%get_local_rows()
res = scnrm2( int(ndim,kind=psb_mpik_), x, int(ione,kind=psb_mpik_) )
! 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)
res = res * sqrt(sone - dd*(abs(x(idx))/res)**2)
end do
else
res = szero
end if
call psb_nrm2(ictxt,res)
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(ictxt,err_act)
return
end subroutine psb_cnrm2vs