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569 lines
18 KiB
Fortran
569 lines
18 KiB
Fortran
!!$
|
|
!!$ Parallel Sparse BLAS version 3.0
|
|
!!$ (C) Copyright 2010
|
|
!!$ 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_zdot.f90
|
|
!
|
|
! Function: psb_zdot
|
|
! psb_zdot forms the dot product of two distributed vectors,
|
|
!
|
|
! dot := sub( X )**C * sub( Y )
|
|
!
|
|
! where sub( X ) denotes X(:,JX)
|
|
!
|
|
! sub( Y ) denotes Y(:,JY).
|
|
!
|
|
! Arguments:
|
|
! x(:,:) - complex The input vector containing the entries of sub( X ).
|
|
! y(:,:) - complex The input vector containing the entries of sub( Y ).
|
|
! desc_a - type(psb_desc_type). The communication descriptor.
|
|
! info - integer. Return code
|
|
! jx - integer(optional). The column offset for sub( X ).
|
|
! jy - integer(optional). The column offset for sub( Y ).
|
|
!
|
|
function psb_zdot(x, y,desc_a, info, jx, jy)
|
|
use psb_descriptor_type
|
|
use psb_check_mod
|
|
use psb_error_mod
|
|
use psb_penv_mod
|
|
implicit none
|
|
|
|
complex(psb_dpk_), intent(in) :: x(:,:), y(:,:)
|
|
type(psb_desc_type), intent(in) :: desc_a
|
|
integer, intent(in), optional :: jx, jy
|
|
integer, intent(out) :: info
|
|
complex(psb_dpk_) :: psb_zdot
|
|
|
|
! locals
|
|
integer :: ictxt, np, me, idx, ndm,&
|
|
& err_act, iix, jjx, ix, ijx, iy, ijy, iiy, jjy, i, m
|
|
complex(psb_dpk_) :: dot_local
|
|
complex(psb_dpk_) :: zdotc
|
|
character(len=20) :: name, ch_err
|
|
|
|
name='psb_zdot'
|
|
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 == -ione) then
|
|
info = psb_err_context_error_
|
|
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(ijx /= 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 == psb_success_) &
|
|
& call psb_chkvect(m,ione,size(y,1),iy,ijy,desc_a,info,iiy,jjy)
|
|
if(info /= psb_success_) then
|
|
info=psb_err_from_subroutine_
|
|
ch_err='psb_chkvect'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
|
|
if ((iix /= ione).or.(iiy /= ione)) 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
|
|
dot_local = zdotc(psb_cd_get_local_rows(desc_a),&
|
|
& x(iix:,jjx),ione,y(iiy:,jjy),ione)
|
|
! adjust dot_local 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)
|
|
dot_local = dot_local - (real(ndm-1)/real(ndm))*(conjg(x(idx,jjx))*y(idx,jjy))
|
|
end do
|
|
else
|
|
dot_local=0.d0
|
|
end if
|
|
else
|
|
dot_local=0.d0
|
|
end if
|
|
|
|
! compute global sum
|
|
call psb_sum(ictxt, dot_local)
|
|
|
|
psb_zdot = dot_local
|
|
|
|
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_zdot
|
|
|
|
|
|
|
|
|
|
!!$
|
|
!!$ Parallel Sparse BLAS version 3.0
|
|
!!$ (C) Copyright 2010
|
|
!!$ 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_zdotv
|
|
! psb_zdotv forms the dot product of two distributed vectors,
|
|
!
|
|
! dot := X**C * Y
|
|
!
|
|
! Arguments:
|
|
! x(:) - complex The input vector containing the entries of X.
|
|
! y(:) - complex The input vector containing the entries of Y.
|
|
! desc_a - type(psb_desc_type). The communication descriptor.
|
|
! info - integer. Return code
|
|
!
|
|
function psb_zdotv(x, y,desc_a, info)
|
|
use psb_descriptor_type
|
|
use psb_check_mod
|
|
use psb_error_mod
|
|
use psb_penv_mod
|
|
implicit none
|
|
|
|
complex(psb_dpk_), intent(in) :: x(:), y(:)
|
|
type(psb_desc_type), intent(in) :: desc_a
|
|
integer, intent(out) :: info
|
|
complex(psb_dpk_) :: psb_zdotv
|
|
|
|
! locals
|
|
integer :: ictxt, np, me, idx, ndm,&
|
|
& err_act, iix, jjx, ix, jx, iy, jy, iiy, jjy, i, m
|
|
complex(psb_dpk_) :: dot_local
|
|
complex(psb_dpk_) :: zdotc
|
|
character(len=20) :: name, ch_err
|
|
|
|
name='psb_zdot'
|
|
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 == -ione) then
|
|
info = psb_err_context_error_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
endif
|
|
|
|
ix = ione
|
|
iy = ione
|
|
jx = ione
|
|
jy = ione
|
|
m = psb_cd_get_global_rows(desc_a)
|
|
|
|
! check vector correctness
|
|
call psb_chkvect(m,ione,size(x,1),ix,jx,desc_a,info,iix,jjx)
|
|
if (info == psb_success_)&
|
|
& call psb_chkvect(m,ione,size(y,1),iy,jy,desc_a,info,iiy,jjy)
|
|
if(info /= psb_success_) then
|
|
info=psb_err_from_subroutine_
|
|
ch_err='psb_chkvect'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
|
|
if ((iix /= ione).or.(iiy /= ione)) 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
|
|
dot_local = zdotc(psb_cd_get_local_rows(desc_a),&
|
|
& x,ione,y,ione)
|
|
! adjust dot_local 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)
|
|
dot_local = dot_local - (real(ndm-1)/real(ndm))*(conjg(x(idx))*y(idx))
|
|
end do
|
|
else
|
|
dot_local=0.d0
|
|
end if
|
|
else
|
|
dot_local=0.d0
|
|
end if
|
|
|
|
! compute global sum
|
|
call psb_sum(ictxt, dot_local)
|
|
|
|
psb_zdotv = dot_local
|
|
|
|
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_zdotv
|
|
|
|
|
|
|
|
!!$
|
|
!!$ Parallel Sparse BLAS version 3.0
|
|
!!$ (C) Copyright 2010
|
|
!!$ 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_zdotvs
|
|
! psb_zdotvs forms the dot product of two distributed vectors,
|
|
!
|
|
! res := X**C * Y
|
|
!
|
|
! Arguments:
|
|
! res - complex. The result.
|
|
! x(:) - complex The input vector containing the entries of X.
|
|
! y(:) - complex The input vector containing the entries of Y.
|
|
! desc_a - type(psb_desc_type). The communication descriptor.
|
|
! info - integer. Return code
|
|
!
|
|
subroutine psb_zdotvs(res, x, y,desc_a, info)
|
|
use psb_sparse_mod, psb_protect_name => psb_zdotvs
|
|
implicit none
|
|
|
|
complex(psb_dpk_), intent(in) :: x(:), y(:)
|
|
complex(psb_dpk_), intent(out) :: res
|
|
type(psb_desc_type), intent(in) :: desc_a
|
|
integer, intent(out) :: info
|
|
|
|
! locals
|
|
integer :: ictxt, np, me, idx, ndm,&
|
|
& err_act, iix, jjx, ix, iy, iiy, jjy, i, m
|
|
complex(psb_dpk_) :: dot_local
|
|
complex(psb_dpk_) :: zdotc
|
|
character(len=20) :: name, ch_err
|
|
|
|
name='psb_zdot'
|
|
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 == -ione) then
|
|
info = psb_err_context_error_
|
|
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,1),ix,ix,desc_a,info,iix,jjx)
|
|
if (info == psb_success_) &
|
|
& call psb_chkvect(m,ione,size(y,1),iy,iy,desc_a,info,iiy,jjy)
|
|
if(info /= psb_success_) then
|
|
info=psb_err_from_subroutine_
|
|
ch_err='psb_chkvect'
|
|
call psb_errpush(info,name,a_err=ch_err)
|
|
goto 9999
|
|
end if
|
|
|
|
if ((iix /= ione).or.(iiy /= ione)) 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
|
|
dot_local = zdotc(psb_cd_get_local_rows(desc_a),&
|
|
& x,ione,y,ione)
|
|
! adjust dot_local 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)
|
|
dot_local = dot_local - (real(ndm-1)/real(ndm))*(conjg(x(idx))*y(idx))
|
|
end do
|
|
else
|
|
dot_local=0.d0
|
|
end if
|
|
else
|
|
dot_local=0.d0
|
|
end if
|
|
|
|
! compute global sum
|
|
call psb_sum(ictxt, dot_local)
|
|
|
|
res = dot_local
|
|
|
|
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_zdotvs
|
|
|
|
|
|
|
|
|
|
!!$
|
|
!!$ Parallel Sparse BLAS version 3.0
|
|
!!$ (C) Copyright 2010
|
|
!!$ 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_zmdots
|
|
! psb_zmdots forms the dot product of multiple distributed vectors,
|
|
!
|
|
! res(i) := ( X(:,i) )**C * ( Y(:,i) )
|
|
!
|
|
! Arguments:
|
|
! res(:) - complex. The result.
|
|
! x(:) - complex The input vector containing the entries of sub( X ).
|
|
! y(:) - complex The input vector containing the entries of sub( Y ).
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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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!
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subroutine psb_zmdots(res, x, y, desc_a, info)
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use psb_sparse_mod, psb_protect_name => psb_zmdots
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implicit none
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complex(psb_dpk_), intent(in) :: x(:,:), y(:,:)
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complex(psb_dpk_), intent(out) :: res(:)
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type(psb_desc_type), intent(in) :: desc_a
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integer, intent(out) :: info
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! locals
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integer :: ictxt, np, me, idx, ndm,&
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& err_act, iix, jjx, ix, iy, iiy, jjy, i, m, j, k
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complex(psb_dpk_),allocatable :: dot_local(:)
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complex(psb_dpk_) :: zdotc
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character(len=20) :: name, ch_err
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name='psb_zmdots'
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if(psb_get_errstatus() /= 0) return
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info=psb_success_
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call psb_erractionsave(err_act)
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ictxt=psb_cd_get_context(desc_a)
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call psb_info(ictxt, me, np)
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if (np == -ione) 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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ix = ione
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iy = ione
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m = psb_cd_get_global_rows(desc_a)
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! check vector correctness
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call psb_chkvect(m,ione,size(x,1),ix,ix,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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goto 9999
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end if
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call psb_chkvect(m,ione,size(y,1),iy,iy,desc_a,info,iiy,jjy)
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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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goto 9999
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end if
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|
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if ((ix /= ione).or.(iy /= ione)) then
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info=psb_err_ix_n1_iy_n1_unsupported_
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call psb_errpush(info,name)
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goto 9999
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end if
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|
|
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k = min(size(x,2),size(y,2))
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allocate(dot_local(k))
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|
|
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if(m /= 0) then
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if(psb_cd_get_local_rows(desc_a) > 0) then
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do j=1,k
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dot_local(j) = zdotc(psb_cd_get_local_rows(desc_a),&
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& x(1:,j),ione,y(1:,j),ione)
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! adjust dot_local because overlapped elements are computed more than once
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end do
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do i=1,size(desc_a%ovrlap_elem,1)
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idx = desc_a%ovrlap_elem(i,1)
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ndm = desc_a%ovrlap_elem(i,2)
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dot_local(1:k) = dot_local(1:k) - (real(ndm-1)/real(ndm))*(conjg(x(idx,1:k))*y(idx,1:k))
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end do
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else
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dot_local(:)=0.d0
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end if
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else
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dot_local(:)=0.d0
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|
end if
|
|
|
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! compute global sum
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call psb_sum(ictxt, dot_local(1:k))
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|
|
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res(1:k) = dot_local(1:k)
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|
|
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call psb_erractionrestore(err_act)
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return
|
|
|
|
9999 continue
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|
call psb_erractionrestore(err_act)
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|
|
|
if (err_act == psb_act_abort_) then
|
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call psb_error(ictxt)
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return
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|
end if
|
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return
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end subroutine psb_zmdots
|