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.
605 lines
18 KiB
Fortran
605 lines
18 KiB
Fortran
!!$
|
|
!!$ Parallel Sparse BLAS version 3.0
|
|
!!$ (C) Copyright 2006, 2007, 2008, 2009, 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_camax.f90
|
|
!
|
|
! Function: psb_camax
|
|
! Searches the absolute max of X.
|
|
!
|
|
! normi := max(abs(sub(X)(i))
|
|
!
|
|
! where sub( X ) denotes X(1:N,JX:).
|
|
!
|
|
! Arguments:
|
|
! x(:,:) - complex The input vector.
|
|
! desc_a - type(psb_desc_type). The communication descriptor.
|
|
! info - integer. Return code
|
|
! jx - integer(optional). The column offset.
|
|
!
|
|
function psb_camax(x,desc_a, info, jx)
|
|
use psb_base_mod, psb_protect_name => psb_camax
|
|
|
|
implicit none
|
|
|
|
complex(psb_spk_), intent(in) :: x(:,:)
|
|
type(psb_desc_type), intent(in) :: desc_a
|
|
integer, intent(out) :: info
|
|
integer, optional, intent(in) :: jx
|
|
real(psb_spk_) :: psb_camax
|
|
|
|
! locals
|
|
integer :: ictxt, np, me,&
|
|
& err_act, iix, jjx, ix, ijx, m, imax, icamax
|
|
real(psb_spk_) :: amax
|
|
character(len=20) :: name, ch_err
|
|
complex :: cdum
|
|
real :: cabs1
|
|
cabs1( cdum ) = abs( real( cdum ) ) + abs( aimag( cdum ) )
|
|
|
|
name='psb_camax'
|
|
if(psb_get_errstatus() /= 0) return
|
|
info=psb_success_
|
|
call psb_erractionsave(err_act)
|
|
|
|
amax=0.d0
|
|
|
|
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()
|
|
|
|
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)
|
|
goto 9999
|
|
end if
|
|
|
|
if (iix /= 1) then
|
|
info=psb_err_ix_n1_iy_n1_unsupported_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
! compute local max
|
|
if ((desc_a%get_local_rows() > 0).and.(m /= 0)) then
|
|
imax=icamax(desc_a%get_local_rows()-iix+1,x(iix,jjx),1)
|
|
amax=cabs1(x(iix+imax-1,jjx))
|
|
else
|
|
amax = szero
|
|
end if
|
|
|
|
! compute global max
|
|
call psb_amx(ictxt, amax)
|
|
|
|
psb_camax=amax
|
|
|
|
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_camax
|
|
|
|
|
|
|
|
|
|
!!$
|
|
!!$ Parallel Sparse BLAS version 3.0
|
|
!!$ (C) Copyright 2006, 2007, 2008, 2009, 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_camaxv
|
|
! Searches the absolute max of X.
|
|
!
|
|
! normi := max(abs(X(i))
|
|
!
|
|
! Arguments:
|
|
! x(:) - complex The input vector.
|
|
! desc_a - type(psb_desc_type). The communication descriptor.
|
|
! info - integer. Return code
|
|
!
|
|
function psb_camaxv (x,desc_a, info)
|
|
use psb_base_mod, psb_protect_name => psb_camaxv
|
|
|
|
implicit none
|
|
|
|
complex(psb_spk_), intent(in) :: x(:)
|
|
type(psb_desc_type), intent(in) :: desc_a
|
|
integer, intent(out) :: info
|
|
real(psb_spk_) :: psb_camaxv
|
|
|
|
! locals
|
|
integer :: ictxt, np, me,&
|
|
& err_act, iix, jjx, jx, ix, m, imax, icamax
|
|
real(psb_spk_) :: amax
|
|
complex(psb_spk_) :: cmax
|
|
character(len=20) :: name, ch_err
|
|
complex :: cdum
|
|
real :: cabs1
|
|
cabs1( cdum ) = abs( real( cdum ) ) + abs( aimag( cdum ) )
|
|
|
|
name='psb_camaxv'
|
|
if(psb_get_errstatus() /= 0) return
|
|
info=psb_success_
|
|
call psb_erractionsave(err_act)
|
|
|
|
amax=0.d0
|
|
|
|
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()
|
|
|
|
call psb_chkvect(m,1,size(x,1),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)
|
|
goto 9999
|
|
end if
|
|
|
|
if (iix /= 1) then
|
|
info=psb_err_ix_n1_iy_n1_unsupported_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
! compute local max
|
|
if ((desc_a%get_local_rows() > 0).and.(m /= 0)) then
|
|
imax=icamax(desc_a%get_local_rows()-iix+1,x(iix),1)
|
|
cmax=(x(iix+imax-1))
|
|
amax=cabs1(cmax)
|
|
else
|
|
amax = szero
|
|
end if
|
|
|
|
! compute global max
|
|
call psb_amx(ictxt, amax)
|
|
|
|
psb_camaxv=amax
|
|
|
|
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_camaxv
|
|
|
|
|
|
function psb_camax_vect(x, desc_a, info) result(res)
|
|
use psb_penv_mod
|
|
use psb_serial_mod
|
|
use psb_descriptor_type
|
|
use psb_check_mod
|
|
use psb_error_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, intent(out) :: info
|
|
|
|
! locals
|
|
integer :: ictxt, np, me,&
|
|
& err_act, iix, jjx, jx, ix, m, imax, isamax
|
|
real(psb_spk_) :: amax
|
|
character(len=20) :: name, ch_err
|
|
|
|
name='psb_camaxv'
|
|
if(psb_get_errstatus() /= 0) return
|
|
info=psb_success_
|
|
call psb_erractionsave(err_act)
|
|
|
|
amax=szero
|
|
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()
|
|
|
|
call psb_chkvect(m,1,x%get_nrows(),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)
|
|
goto 9999
|
|
end if
|
|
|
|
if (iix /= 1) then
|
|
info=psb_err_ix_n1_iy_n1_unsupported_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
! compute local max
|
|
if ((desc_a%get_local_rows() > 0).and.(m /= 0)) then
|
|
amax=x%amax(desc_a%get_local_rows())
|
|
else
|
|
amax = szero
|
|
end if
|
|
|
|
! compute global max
|
|
call psb_amx(ictxt, amax)
|
|
|
|
res=amax
|
|
|
|
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_camax_vect
|
|
|
|
|
|
!!$
|
|
!!$ Parallel Sparse BLAS version 3.0
|
|
!!$ (C) Copyright 2006, 2007, 2008, 2009, 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_camaxvs
|
|
! Searches the absolute max of X.
|
|
!
|
|
! normi := max(abs(sub(X)(i))
|
|
!
|
|
! where sub( X ) denotes X(1:N,JX:).
|
|
!
|
|
! Arguments:
|
|
! res - real The result.
|
|
! x(:,:) - complex The input vector.
|
|
! desc_a - type(psb_desc_type). The communication descriptor.
|
|
! info - integer. Return code
|
|
! jx - integer(optional). The column offset.
|
|
!
|
|
subroutine psb_camaxvs(res,x,desc_a, info)
|
|
use psb_base_mod, psb_protect_name => psb_camaxvs
|
|
|
|
implicit none
|
|
|
|
complex(psb_spk_), intent(in) :: x(:)
|
|
type(psb_desc_type), intent(in) :: desc_a
|
|
integer, intent(out) :: info
|
|
real(psb_spk_), intent(out) :: res
|
|
|
|
! locals
|
|
integer :: ictxt, np, me,&
|
|
& err_act, iix, jjx, ix, ijx, m, imax, icamax
|
|
real(psb_spk_) :: amax
|
|
character(len=20) :: name, ch_err
|
|
complex(psb_spk_) :: cmax
|
|
complex :: cdum
|
|
real :: cabs1
|
|
cabs1( cdum ) = abs( real( cdum ) ) + abs( aimag( cdum ) )
|
|
|
|
name='psb_camaxvs'
|
|
if(psb_get_errstatus() /= 0) return
|
|
info=psb_success_
|
|
call psb_erractionsave(err_act)
|
|
|
|
amax=0.d0
|
|
|
|
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
|
|
ijx=1
|
|
|
|
m = desc_a%get_global_rows()
|
|
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)
|
|
goto 9999
|
|
end if
|
|
|
|
if (iix /= 1) then
|
|
info=psb_err_ix_n1_iy_n1_unsupported_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
! compute local max
|
|
if ((desc_a%get_local_rows() > 0).and.(m /= 0)) then
|
|
imax=icamax(desc_a%get_local_rows()-iix+1,x(iix),1)
|
|
cmax=(x(iix+imax-1))
|
|
amax=cabs1(cmax)
|
|
else
|
|
amax = szero
|
|
end if
|
|
|
|
! compute global max
|
|
call psb_amx(ictxt, amax)
|
|
|
|
res = amax
|
|
|
|
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_camaxvs
|
|
|
|
|
|
!!$
|
|
!!$ Parallel Sparse BLAS version 3.0
|
|
!!$ (C) Copyright 2006, 2007, 2008, 2009, 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_cmamaxs
|
|
! Searches the absolute max of X.
|
|
!
|
|
! normi := max(abs(X(i))
|
|
!
|
|
! Arguments:
|
|
! res(:) - real. The result.
|
|
! x(:,:) - complex The input vector.
|
|
! desc_a - type(psb_desc_type). The communication descriptor.
|
|
! info - integer. Return code
|
|
!
|
|
subroutine psb_cmamaxs(res,x,desc_a, info,jx)
|
|
use psb_base_mod, psb_protect_name => psb_cmamaxs
|
|
|
|
implicit none
|
|
|
|
complex(psb_spk_), intent(in) :: x(:,:)
|
|
type(psb_desc_type), intent(in) :: desc_a
|
|
integer, intent(out) :: info
|
|
integer, optional, intent(in) :: jx
|
|
real(psb_spk_), intent(out) :: res(:)
|
|
|
|
! locals
|
|
integer :: ictxt, np, me,&
|
|
& err_act, iix, jjx, ix, ijx, m, imax, i, k, icamax
|
|
real(psb_spk_) :: amax
|
|
character(len=20) :: name, ch_err
|
|
complex(psb_spk_) :: cmax
|
|
complex :: cdum
|
|
real :: cabs1
|
|
cabs1( cdum ) = abs( real( cdum ) ) + abs( aimag( cdum ) )
|
|
|
|
name='psb_cmamaxs'
|
|
if (psb_get_errstatus() /= 0) return
|
|
info=psb_success_
|
|
call psb_erractionsave(err_act)
|
|
|
|
amax=0.d0
|
|
|
|
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()
|
|
k = min(size(x,2),size(res,1))
|
|
|
|
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)
|
|
goto 9999
|
|
end if
|
|
|
|
if (iix /= 1) then
|
|
info=psb_err_ix_n1_iy_n1_unsupported_
|
|
call psb_errpush(info,name)
|
|
goto 9999
|
|
end if
|
|
|
|
! compute local max
|
|
if ((desc_a%get_local_rows() > 0).and.(m /= 0)) then
|
|
do i=1,k
|
|
imax=icamax(desc_a%get_local_rows()-iix+1,x(iix,jjx+i-1),1)
|
|
cmax=(x(iix+imax-1,jjx+i-1))
|
|
res(i)=cabs1(cmax)
|
|
end do
|
|
else
|
|
amax = szero
|
|
end if
|
|
|
|
! compute global max
|
|
call psb_amx(ictxt, res(1:k))
|
|
|
|
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_cmamaxs
|