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719 lines
21 KiB
Fortran
719 lines
21 KiB
Fortran
!
|
|
! Parallel Sparse BLAS version 3.5
|
|
! (C) Copyright 2006-2018
|
|
! Salvatore Filippone
|
|
! Alfredo Buttari
|
|
!
|
|
! 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
|
|
! Computes the norm2 of a distributed vector,
|
|
!
|
|
! norm2 := sqrt ( sub( X )**C * 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 ).
|
|
! global - logical(optional) Whether to perform the global reduction, default: .true.
|
|
!
|
|
function psb_cnrm2(x, desc_a, info, jx,global) 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
|
|
logical, intent(in), optional :: global
|
|
|
|
! locals
|
|
integer(psb_ipk_) :: ictxt, np, me,&
|
|
& err_act, iix, jjx, ndim, i, id, idx, ndm, ldx
|
|
integer(psb_lpk_) :: ix, ijx, iy, ijy, m
|
|
logical :: global_
|
|
real(psb_spk_) :: scnrm2, dd
|
|
character(len=20) :: name, ch_err
|
|
|
|
name='psb_cnrm2'
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|
info=psb_success_
|
|
call psb_erractionsave(err_act)
|
|
if (psb_errstatus_fatal()) then
|
|
info = psb_err_internal_error_ ; goto 9999
|
|
end if
|
|
|
|
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
|
|
|
|
if (present(global)) then
|
|
global_ = global
|
|
else
|
|
global_ = .true.
|
|
end if
|
|
|
|
m = desc_a%get_global_rows()
|
|
ldx = size(x,1)
|
|
call psb_chkvect(m,lone,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_mpk_), x(iix:,jjx), int(ione,kind=psb_mpk_) )
|
|
|
|
! 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
|
|
|
|
if (global_) 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 3.5
|
|
!!$ (C) Copyright 2006-2018
|
|
!!$ Salvatore Filippone University of Rome Tor Vergata
|
|
!!$ Alfredo Buttari
|
|
!!$
|
|
!!$ 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
|
|
! Computes the norm2 of a distributed vector,
|
|
!
|
|
! norm2 := sqrt ( X**C * 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
|
|
! global - logical(optional) Whether to perform the global reduction, default: .true.
|
|
!
|
|
function psb_cnrm2v(x, desc_a, info,global) 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
|
|
logical, intent(in), optional :: global
|
|
|
|
! locals
|
|
integer(psb_ipk_) :: ictxt, np, me,&
|
|
& err_act, iix, jjx, ndim, i, id, idx, ndm, ldx
|
|
integer(psb_lpk_) :: ix, jx, iy, ijy, m
|
|
real(psb_spk_) :: scnrm2, dd
|
|
logical :: global_
|
|
character(len=20) :: name, ch_err
|
|
|
|
name='psb_cnrm2v'
|
|
info=psb_success_
|
|
call psb_erractionsave(err_act)
|
|
if (psb_errstatus_fatal()) then
|
|
info = psb_err_internal_error_ ; goto 9999
|
|
end if
|
|
|
|
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 (present(global)) then
|
|
global_ = global
|
|
else
|
|
global_ = .true.
|
|
end if
|
|
ix = 1
|
|
jx=1
|
|
m = desc_a%get_global_rows()
|
|
ldx = size(x,1)
|
|
call psb_chkvect(m,lone,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_mpk_), x, int(ione,kind=psb_mpk_) )
|
|
! 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
|
|
|
|
if (global_) 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
|
|
! Computes the norm2 of a distributed vector,
|
|
!
|
|
! norm2 := sqrt ( X**C * X)
|
|
!
|
|
! Arguments:
|
|
! x - type(psb_c_vect_type) The input vector containing the entries of X.
|
|
! desc_a - type(psb_desc_type). The communication descriptor.
|
|
! info - integer. Return code
|
|
! global - logical(optional) Whether to perform the global reduction, default: .true.
|
|
!
|
|
function psb_cnrm2_vect(x, desc_a, info,global) 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
|
|
logical, intent(in), optional :: global
|
|
|
|
! locals
|
|
integer(psb_ipk_) :: ictxt, np, me,&
|
|
& err_act, iix, jjx, ndim, i, id, idx, ndm, ldx
|
|
integer(psb_lpk_) :: ix, jx, iy, ijy, m
|
|
logical :: global_
|
|
real(psb_spk_) :: snrm2, dd
|
|
character(len=20) :: name, ch_err
|
|
|
|
name='psb_cnrm2v'
|
|
if (psb_errstatus_fatal()) then
|
|
info = psb_err_internal_error_ ; goto 9999
|
|
end if
|
|
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
|
|
|
|
if (present(global)) then
|
|
global_ = global
|
|
else
|
|
global_ = .true.
|
|
end if
|
|
|
|
ix = 1
|
|
jx = 1
|
|
m = desc_a%get_global_rows()
|
|
ldx = x%get_nrows()
|
|
call psb_chkvect(m,lone,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
|
|
if (size(desc_a%ovrlap_elem,1)>0) then
|
|
if (x%is_dev()) call x%sync()
|
|
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)
|
|
res = res - sqrt(cone - dd*(abs(x%v%v(idx))/res)**2)
|
|
end do
|
|
end if
|
|
else
|
|
res = szero
|
|
end if
|
|
|
|
if (global_) 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
|
|
|
|
! Function: psb_cnrm2_weight_vect
|
|
! Computes the weighted norm2 of a distributed vector,
|
|
!
|
|
! norm2 := sqrt ( (w.*X)**C * (w.*X))
|
|
!
|
|
! Arguments:
|
|
! x - type(psb_c_vect_type) The input vector containing the entries of X.
|
|
! w - type(psb_c_vect_type) The input vector containing the entries of W.
|
|
! desc_a - type(psb_desc_type). The communication descriptor.
|
|
! info - integer. Return code
|
|
! global - logical(optional) Whether to perform the global reduction, default: .true.
|
|
!
|
|
function psb_cnrm2_weight_vect(x,w, desc_a, info,global) 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_c_vect_type), intent (inout) :: w
|
|
type(psb_desc_type), intent(in) :: desc_a
|
|
integer(psb_ipk_), intent(out) :: info
|
|
logical, intent(in), optional :: global
|
|
|
|
! locals
|
|
integer(psb_ipk_) :: ictxt, np, me,&
|
|
& err_act, iix, jjx, ndim, i, id, idx, ndm, ldx
|
|
integer(psb_lpk_) :: ix, jx, iy, ijy, m
|
|
logical :: global_
|
|
real(psb_spk_) :: snrm2, dd
|
|
character(len=20) :: name, ch_err
|
|
|
|
name='psb_cnrm2v_weight'
|
|
if (psb_errstatus_fatal()) then
|
|
info = psb_err_internal_error_ ; goto 9999
|
|
end if
|
|
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
|
|
|
|
if (present(global)) then
|
|
global_ = global
|
|
else
|
|
global_ = .true.
|
|
end if
|
|
|
|
ix = 1
|
|
jx = 1
|
|
m = desc_a%get_global_rows()
|
|
ldx = x%get_nrows()
|
|
call psb_chkvect(m,lone,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,w)
|
|
! adjust because overlapped elements are computed more than once
|
|
if (size(desc_a%ovrlap_elem,1)>0) then
|
|
if (x%is_dev()) call x%sync()
|
|
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)
|
|
res = res - sqrt(cone - dd*(abs(x%v%v(idx))/res)**2)
|
|
end do
|
|
end if
|
|
else
|
|
res = szero
|
|
end if
|
|
|
|
if (global_) call psb_nrm2(ictxt,res)
|
|
|
|
call psb_erractionrestore(err_act)
|
|
return
|
|
|
|
9999 call psb_error_handler(ictxt,err_act)
|
|
|
|
return
|
|
end function psb_cnrm2_weight_vect
|
|
|
|
! Function: psb_cnrm2_weight_vect
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! Computes the weighted norm2 of a distributed vector with respect to a mask
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! contained in the vector id.
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!
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! norm2 := sqrt ( (w(id > 0).*X(id > 0))**C * (w(id > 0).*X(id > 0)))
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!
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! Arguments:
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|
! x - type(psb_c_vect_type) The input vector containing the entries of X.
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! w - type(psb_c_vect_type) The input vector containing the entries of W.
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! id - type(psb_c_vect_type) The inpute vector containing the mask
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! desc_a - type(psb_desc_type). The communication descriptor.
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! info - integer. Return code
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! global - logical(optional) Whether to perform the global reduction, default: .true.
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!
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function psb_cnrm2_weightmask_vect(x,w,idv, desc_a, info,global) result(res)
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use psb_desc_mod
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use psb_check_mod
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use psb_error_mod
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use psb_penv_mod
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use psb_c_vect_mod
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implicit none
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real(psb_spk_) :: res
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type(psb_c_vect_type), intent (inout) :: x
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type(psb_c_vect_type), intent (inout) :: w
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type(psb_c_vect_type), intent (inout) :: idv
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type(psb_desc_type), intent(in) :: desc_a
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integer(psb_ipk_), intent(out) :: info
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logical, intent(in), optional :: global
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|
|
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! locals
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integer(psb_ipk_) :: ictxt, np, me,&
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& err_act, iix, jjx, ndim, i, id, idx, ndm, ldx
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integer(psb_lpk_) :: ix, jx, iy, ijy, m
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logical :: global_
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real(psb_spk_) :: snrm2, dd
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character(len=20) :: name, ch_err
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|
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name='psb_cnrm2v_weightmask'
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if (psb_errstatus_fatal()) then
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info = psb_err_internal_error_ ; goto 9999
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end if
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info=psb_success_
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call psb_erractionsave(err_act)
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ictxt=desc_a%get_context()
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|
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call psb_info(ictxt, me, np)
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if (np == -1) then
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info=psb_err_context_error_
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call psb_errpush(info,name)
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goto 9999
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endif
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|
|
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if (.not.allocated(x%v)) then
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info = psb_err_invalid_vect_state_
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call psb_errpush(info,name)
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goto 9999
|
|
endif
|
|
|
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if (present(global)) then
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global_ = global
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else
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global_ = .true.
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end if
|
|
|
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ix = 1
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jx = 1
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m = desc_a%get_global_rows()
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ldx = x%get_nrows()
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call psb_chkvect(m,lone,ldx,ix,jx,desc_a,info,iix,jjx)
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if(info /= psb_success_) then
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info=psb_err_from_subroutine_
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ch_err='psb_chkvect'
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call psb_errpush(info,name,a_err=ch_err)
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|
end if
|
|
|
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if (iix /= 1) then
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info=psb_err_ix_n1_iy_n1_unsupported_
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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,w,idv)
|
|
! adjust because overlapped elements are computed more than once
|
|
if (size(desc_a%ovrlap_elem,1)>0) then
|
|
if (x%is_dev()) call x%sync()
|
|
do i=1,size(desc_a%ovrlap_elem,1)
|
|
idx = desc_a%ovrlap_elem(i,1)
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|
ndm = desc_a%ovrlap_elem(i,2)
|
|
dd = dble(ndm-1)/dble(ndm)
|
|
res = res - sqrt(cone - dd*(abs(x%v%v(idx))/res)**2)
|
|
end do
|
|
end if
|
|
else
|
|
res = szero
|
|
end if
|
|
|
|
if (global_) call psb_nrm2(ictxt,res)
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|
|
|
call psb_erractionrestore(err_act)
|
|
return
|
|
|
|
9999 call psb_error_handler(ictxt,err_act)
|
|
|
|
return
|
|
end function psb_cnrm2_weightmask_vect
|
|
|
|
!!$
|
|
!!$ Parallel Sparse BLAS version 3.5
|
|
!!$ (C) Copyright 2006-2018
|
|
!!$ Salvatore Filippone University of Rome Tor Vergata
|
|
!!$ Alfredo Buttari
|
|
!!$
|
|
!!$ 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
|
|
! Computes the norm2 of a distributed vector, subroutine version
|
|
!
|
|
! norm2 := sqrt ( X**C * 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
|
|
! global - logical(optional) Whether to perform the global reduction, default: .true.
|
|
!
|
|
subroutine psb_cnrm2vs(res, x, desc_a, info,global)
|
|
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
|
|
logical, intent(in), optional :: global
|
|
|
|
! locals
|
|
integer(psb_ipk_) :: ictxt, np, me,&
|
|
& err_act, iix, jjx, ndim, i, id, idx, ndm, ldx
|
|
integer(psb_lpk_) :: ix, jx, iy, ijy, m
|
|
logical :: global_
|
|
real(psb_spk_) :: nrm2, scnrm2, dd
|
|
character(len=20) :: name, ch_err
|
|
|
|
name='psb_cnrm2'
|
|
info=psb_success_
|
|
call psb_erractionsave(err_act)
|
|
if (psb_errstatus_fatal()) then
|
|
info = psb_err_internal_error_ ; goto 9999
|
|
end if
|
|
|
|
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 (present(global)) then
|
|
global_ = global
|
|
else
|
|
global_ = .true.
|
|
end if
|
|
|
|
ix = 1
|
|
jx = 1
|
|
m = desc_a%get_global_rows()
|
|
ldx = size(x,1)
|
|
call psb_chkvect(m,lone,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_mpk_), x, int(ione,kind=psb_mpk_) )
|
|
|
|
! 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
|
|
|
|
if (global_) call psb_nrm2(ictxt,res)
|
|
|
|
|
|
call psb_erractionrestore(err_act)
|
|
return
|
|
|
|
9999 call psb_error_handler(ictxt,err_act)
|
|
|
|
return
|
|
end subroutine psb_cnrm2vs
|