!!$ !!$ Parallel Sparse BLAS v2.0 !!$ (C) Copyright 2006 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_dnrm2.f90 ! ! Function: psb_dnrm2 ! Forms the norm2 of a distributed vector, ! ! norm2 := sqrt ( sub( X )**T * sub( X ) ) ! ! where sub( X ) denotes X(:,JX). ! ! Parameters: ! x - real,dimension(:,:). The input vector containing the entries of sub( X ). ! desc_a - type(). The communication descriptor. ! info - integer. Eventually returns an error code. ! jx - integer(optional). The column offset for sub( X ). ! function psb_dnrm2(x, desc_a, info, jx) use psb_descriptor_type use psb_check_mod use psb_error_mod use psb_penv_mod implicit none real(kind(1.d0)), intent(in) :: x(:,:) type(psb_desc_type), intent(in) :: desc_a integer, intent(in), optional :: jx integer, intent(out) :: info real(kind(1.D0)) :: psb_dnrm2 ! locals integer :: ictxt, np, me,& & err_act, n, iix, jjx, ndim, ix, ijx, i, m, id real(kind(1.d0)) :: nrm2, dnrm2, dd external dcombnrm2 character(len=20) :: name, ch_err name='psb_dnrm2' if(psb_get_errstatus().ne.0) return info=0 call psb_erractionsave(err_act) ictxt=psb_cd_get_context(desc_a) call psb_info(ictxt, me, np) if (np == -1) then info = 2010 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.ne.0) then info=4010 ch_err='psb_chkvect' call psb_errpush(info,name,a_err=ch_err) end if if (iix.ne.1) then info=3040 call psb_errpush(info,name) goto 9999 end if if(m.ne.0) then if (psb_cd_get_local_rows(desc_a) .gt. 0) then ndim = psb_cd_get_local_rows(desc_a) nrm2 = dnrm2( ndim, x(iix,jjx), ione ) i=1 do while (desc_a%ovrlap_elem(i) .ne. -1) id = desc_a%ovrlap_elem(i+psb_n_dom_ovr_) dd = dble(id-1)/dble(id) nrm2 = nrm2 * sqrt(& & done - dd * ( & & x(desc_a%ovrlap_elem(i+psb_ovrlp_elem_), jjx) & & / nrm2 & & ) ** 2 & & ) i = i+2 end do else nrm2 = dzero end if else nrm2 = dzero end if call pdtreecomb(ictxt,'All',1,nrm2,-1,-1,dcombnrm2) psb_dnrm2 = nrm2 call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act.eq.act_abort) then call psb_error(ictxt) return end if return end function psb_dnrm2 !!$ !!$ Parallel Sparse BLAS v2.0 !!$ (C) Copyright 2006 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_dnrm2 ! Forms the norm2 of a distributed vector, ! ! norm2 := sqrt ( X**T * X) ! ! Parameters: ! x - real,dimension(:). The input vector containing the entries of X. ! desc_a - type(). The communication descriptor. ! info - integer. Eventually returns an error code. ! function psb_dnrm2v(x, desc_a, info) use psb_descriptor_type use psb_check_mod use psb_error_mod use psb_penv_mod implicit none real(kind(1.d0)), intent(in) :: x(:) type(psb_desc_type), intent(in) :: desc_a integer, intent(out) :: info real(kind(1.D0)) :: psb_dnrm2v ! locals integer :: ictxt, np, me,& & err_act, n, iix, jjx, ndim, ix, jx, ijx, i, m, id real(kind(1.d0)) :: nrm2, dnrm2, dd external dcombnrm2 character(len=20) :: name, ch_err name='psb_dnrm2v' if(psb_get_errstatus().ne.0) return info=0 call psb_erractionsave(err_act) ictxt=psb_cd_get_context(desc_a) call psb_info(ictxt, me, np) if (np == -1) then info = 2010 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),ix,jx,desc_a,info,iix,jjx) if(info.ne.0) then info=4010 ch_err='psb_chkvect' call psb_errpush(info,name,a_err=ch_err) end if if (iix.ne.1) then info=3040 call psb_errpush(info,name) goto 9999 end if if(m.ne.0) then if (psb_cd_get_local_rows(desc_a) .gt. 0) then ndim = psb_cd_get_local_rows(desc_a) nrm2 = dnrm2( ndim, x, ione ) i=1 do while (desc_a%ovrlap_elem(i) .ne. -1) id = desc_a%ovrlap_elem(i+psb_n_dom_ovr_) dd = dble(id-1)/dble(id) nrm2 = nrm2 * sqrt(& & done - dd * ( & & x(desc_a%ovrlap_elem(i+psb_ovrlp_elem_)) & & / nrm2 & & ) ** 2 & & ) i = i+2 end do else nrm2 = dzero end if else nrm2 = dzero end if call pdtreecomb(ictxt,'All',1,nrm2,-1,-1,dcombnrm2) psb_dnrm2v = nrm2 call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act.eq.act_abort) then call psb_error(ictxt) return end if return end function psb_dnrm2v !!$ !!$ Parallel Sparse BLAS v2.0 !!$ (C) Copyright 2006 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_dnrm2 ! Forms the norm2 of a distributed vector, ! ! norm2 := sqrt ( X**T * X) ! ! Parameters: ! res - real. The result. ! x - real,dimension(:). The input vector containing the entries of X. ! desc_a - type(). The communication descriptor. ! info - integer. Eventually returns an error code. ! subroutine psb_dnrm2vs(res, x, desc_a, info) use psb_descriptor_type use psb_check_mod use psb_error_mod use psb_penv_mod implicit none real(kind(1.d0)), intent(in) :: x(:) real(kind(1.d0)), intent(out) :: res type(psb_desc_type), intent(in) :: desc_a integer, intent(out) :: info ! locals integer :: ictxt, np, me,& & err_act, n, iix, jjx, ndim, ix, jx, ijx, i, m, id real(kind(1.d0)) :: nrm2, dnrm2, dd external dcombnrm2 character(len=20) :: name, ch_err name='psb_dnrm2' if(psb_get_errstatus().ne.0) return info=0 call psb_erractionsave(err_act) ictxt=psb_cd_get_context(desc_a) call psb_info(ictxt, me, np) if (np == -1) then info = 2010 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),ix,jx,desc_a,info,iix,jjx) if(info.ne.0) then info=4010 ch_err='psb_chkvect' call psb_errpush(info,name,a_err=ch_err) end if if (iix.ne.1) then info=3040 call psb_errpush(info,name) goto 9999 end if if(m.ne.0) then if (psb_cd_get_local_rows(desc_a) .gt. 0) then ndim = psb_cd_get_local_rows(desc_a) nrm2 = dnrm2( ndim, x, ione ) i=1 do while (desc_a%ovrlap_elem(i) .ne. -1) id = desc_a%ovrlap_elem(i+psb_n_dom_ovr_) dd = dble(id-1)/dble(id) nrm2 = nrm2 * sqrt(& & done - dd * ( & & x(desc_a%ovrlap_elem(i+psb_ovrlp_elem_)) & & / nrm2 & & ) ** 2 & & ) i = i+2 end do else nrm2 = dzero end if else nrm2 = dzero end if call pdtreecomb(ictxt,'All',1,nrm2,-1,-1,dcombnrm2) res = nrm2 call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act.eq.act_abort) then call psb_error(ictxt) return end if return end subroutine psb_dnrm2vs