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psblas3/base/psblas/psb_damax.f90

504 lines
16 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_damax.f90
!
! Function: psb_damax
! Searches the absolute max of X.
!
! normi := max(abs(sub(X)(i))
!
! where sub( X ) denotes X(1:N,JX:).
!
! Arguments:
! x(:,:) - real The input vector.
! desc_a - type(psb_desc_type). The communication descriptor.
! info - integer. Return code
! jx - integer(optional). The column offset.
!
function psb_damax (x,desc_a, info, jx)
use psb_penv_mod
use psb_serial_mod
use psb_descriptor_type
use psb_check_mod
use psb_error_mod
implicit none
real(psb_dpk_), intent(in) :: x(:,:)
type(psb_desc_type), intent(in) :: desc_a
integer, intent(out) :: info
integer, optional, intent(in) :: jx
real(psb_dpk_) :: psb_damax
! locals
integer :: ictxt, np, me,&
& err_act, iix, jjx, ix, ijx, m, imax, idamax
real(psb_dpk_) :: amax
character(len=20) :: name, ch_err
name='psb_damax'
if(psb_get_errstatus() /= 0) return
info=psb_success_
call psb_erractionsave(err_act)
amax=0.d0
ictxt=psb_cd_get_context(desc_a)
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 = psb_cd_get_global_rows(desc_a)
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 ((psb_cd_get_local_rows(desc_a) > 0).and.(m /= 0)) then
imax=idamax(psb_cd_get_local_rows(desc_a)-iix+1,x(iix,jjx),1)
amax=abs(x(iix+imax-1,jjx))
else
amax = dzero
end if
! compute global max
call psb_amx(ictxt, amax)
psb_damax=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_damax
!!$
!!$ 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_damaxv
! Searches the absolute max of X.
!
! normi := max(abs(X(i))
!
! Arguments:
! x(:) - real The input vector.
! desc_a - type(psb_desc_type). The communication descriptor.
! info - integer. Return code
!
function psb_damaxv (x,desc_a, info)
use psb_penv_mod
use psb_serial_mod
use psb_descriptor_type
use psb_check_mod
use psb_error_mod
implicit none
real(psb_dpk_), intent(in) :: x(:)
type(psb_desc_type), intent(in) :: desc_a
integer, intent(out) :: info
real(psb_dpk_) :: psb_damaxv
! locals
integer :: ictxt, np, me,&
& err_act, iix, jjx, jx, ix, m, imax, idamax
real(psb_dpk_) :: amax
character(len=20) :: name, ch_err
name='psb_damaxv'
if(psb_get_errstatus() /= 0) return
info=psb_success_
call psb_erractionsave(err_act)
amax=0.d0
ictxt=psb_cd_get_context(desc_a)
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 = psb_cd_get_global_rows(desc_a)
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 ((psb_cd_get_local_rows(desc_a) > 0).and.(m /= 0)) then
imax=idamax(psb_cd_get_local_rows(desc_a)-iix+1,x(iix),1)
amax=abs(x(iix+imax-1))
else
amax = dzero
end if
! compute global max
call psb_amx(ictxt, amax)
psb_damaxv=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_damaxv
!!$
!!$ 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_damaxvs
! 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(:,:) - real The input vector.
! desc_a - type(psb_desc_type). The communication descriptor.
! info - integer. Return code
! jx - integer(optional). The column offset.
!
subroutine psb_damaxvs (res,x,desc_a, info)
use psb_sparse_mod, psb_protect_name => psb_damaxvs
implicit none
real(psb_dpk_), intent(in) :: x(:)
type(psb_desc_type), intent(in) :: desc_a
integer, intent(out) :: info
real(psb_dpk_), intent(out) :: res
! locals
integer :: ictxt, np, me,&
& err_act, iix, jjx, ix, ijx, m, imax, idamax
real(psb_dpk_) :: amax
character(len=20) :: name, ch_err
name='psb_damaxvs'
if(psb_get_errstatus() /= 0) return
info=psb_success_
call psb_erractionsave(err_act)
amax=0.d0
ictxt=psb_cd_get_context(desc_a)
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 = psb_cd_get_global_rows(desc_a)
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 ((psb_cd_get_local_rows(desc_a) > 0).and.(m /= 0)) then
imax=idamax(psb_cd_get_local_rows(desc_a)-iix+1,x(iix),1)
amax=abs(x(iix+imax-1))
else
amax = dzero
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_damaxvs
!!$
!!$ 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_dmamaxs
! Searches the absolute max of X.
!
! normi := max(abs(X(i))
!
! Arguments:
! res(:) - real The result.
! x(:,:) - real The input vector.
! desc_a - type(psb_desc_type). The communication descriptor.
! info - integer. Return code
!
subroutine psb_dmamaxs (res,x,desc_a, info,jx)
use psb_sparse_mod, psb_protect_name => psb_dmamaxs
implicit none
real(psb_dpk_), intent(in) :: x(:,:)
type(psb_desc_type), intent(in) :: desc_a
integer, intent(out) :: info
integer, optional, intent(in) :: jx
real(psb_dpk_), intent(out) :: res(:)
! locals
integer :: ictxt, np, me,&
& err_act, iix, jjx, ix, ijx, m, imax, i, k, idamax
real(psb_dpk_) :: amax
character(len=20) :: name, ch_err
name='psb_dmamaxs'
if (psb_get_errstatus() /= 0) return
info=psb_success_
call psb_erractionsave(err_act)
amax=0.d0
ictxt=psb_cd_get_context(desc_a)
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 = psb_cd_get_global_rows(desc_a)
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 ((psb_cd_get_local_rows(desc_a) > 0).and.(m /= 0)) then
do i=1,k
imax=idamax(psb_cd_get_local_rows(desc_a)-iix+1,x(iix,jjx+i-1),1)
res(i)=abs(x(iix+imax-1,jjx+i-1))
end do
else
amax = dzero
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_dmamaxs