!!$ !!$ 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_daxpby.f90 ! ! Subroutine: psb_daxpby ! Adds one distributed matrix to another, ! ! sub( Y ) := beta * sub( Y ) + alpha * sub( X ) ! ! where sub( X ) denotes X(:,JX) ! ! sub( Y ) denotes Y(:,JY). ! ! Arguments: ! alpha - real. The scalar used to multiply each component of sub( X ). ! x - real,dimension(:,:). The input vector containing the entries of sub( X ). ! beta - real. The scalar used to multiply each component of sub( Y ). ! y - real,dimension(:,:). The input vector containing the entries of sub( Y ). ! desc_a - 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 ). ! subroutine psb_daxpby(alpha, x, beta,y,desc_a,info, n, jx, jy) use psb_descriptor_type use psb_check_mod use psb_const_mod use psb_error_mod use psb_penv_mod implicit none integer, intent(in), optional :: n, jx, jy integer, intent(out) :: info type(psb_desc_type), intent(in) :: desc_a real(kind(1.D0)), intent(in) :: alpha, beta real(kind(1.D0)), intent(in) :: x(:,:) real(kind(1.D0)), intent(inout) :: y(:,:) ! locals integer :: ictxt, np, me,& & err_act, iix, jjx, ix, iy, ijx, ijy, m, iiy, in, jjy real(kind(1.d0)),pointer :: tmpx(:) character(len=20) :: name, ch_err name='psb_dgeaxpby' 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 == -ione) then info = 2010 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 (present(n)) then if(((ijx+n).le.size(x,2)).and.& & ((ijy+n).le.size(y,2))) then in = n else in = min(size(x,2),size(y,2)) end if else in = min(size(x,2),size(y,2)) endif if(ijx.ne.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 == 0) & & call psb_chkvect(m,ione,size(y,1),iy,ijy,desc_a,info,iiy,jjy) if(info.ne.0) then info=4010 ch_err='psb_chkvect' call psb_errpush(info,name,a_err=ch_err) goto 9999 end if if ((iix.ne.ione).or.(iiy.ne.ione)) then info=3040 call psb_errpush(info,name) goto 9999 end if if ((in.ne.0)) then if(psb_cd_get_local_rows(desc_a).gt.0) then call daxpby(psb_cd_get_local_rows(desc_a),in,& & alpha,x(iix,jjx),size(x,1),beta,& & y(iiy,jjy),size(y,1),info) end if end if call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act.eq.psb_act_abort_) then call psb_error(ictxt) return end if return end subroutine psb_daxpby !!$ !!$ 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_dgeaxpbyv ! Adds one distributed matrix to another, ! ! Y := beta * Y + alpha * X ! ! Arguments: ! alpha - real. The scalar used to multiply each component of X. ! x - real,dimension(:). The input vector containing the entries of X. ! beta - real. The scalar used to multiply each component of Y. ! y - real,dimension(:). The input vector containing the entries of Y. ! desc_a - type(). The communication descriptor. ! info - integer. Return code ! subroutine psb_daxpbyv(alpha, x, beta,y,desc_a,info) use psb_descriptor_type use psb_const_mod use psb_check_mod use psb_error_mod use psb_penv_mod implicit none integer, intent(out) :: info type(psb_desc_type), intent(in) :: desc_a real(kind(1.D0)), intent(in) :: alpha, beta real(kind(1.D0)), intent(in) :: x(:) real(kind(1.D0)), intent(inout) :: y(:) ! locals integer :: ictxt, np, me,& & err_act, n, iix, jjx, ix, iy, ijx, m, iiy, in, jjy character(len=20) :: name, ch_err logical, parameter :: debug=.false. name='psb_dgeaxpby' 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 == -ione) then info = 2010 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),ix,ione,desc_a,info,iix,jjx) if(info.ne.0) then info=4010 ch_err='psb_chkvect 1' call psb_errpush(info,name,a_err=ch_err) goto 9999 end if call psb_chkvect(m,ione,size(y),iy,ione,desc_a,info,iiy,jjy) if(info.ne.0) then info=4010 ch_err='psb_chkvect 2' call psb_errpush(info,name,a_err=ch_err) goto 9999 end if if ((iix.ne.ione).or.(iiy.ne.ione)) then info=3040 call psb_errpush(info,name) end if if(psb_cd_get_local_rows(desc_a).gt.0) then call daxpby(psb_cd_get_local_rows(desc_a),ione,& & alpha,x,size(x),beta,& & y,size(y),info) end if call psb_erractionrestore(err_act) return 9999 continue call psb_erractionrestore(err_act) if (err_act.eq.psb_act_abort_) then call psb_error(ictxt) return end if return end subroutine psb_daxpbyv