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psblas3/base/serial/psb_spge_dot.f90

105 lines
3.4 KiB
Fortran

!!$
!!$ Parallel Sparse BLAS version 3.0
!!$ (C) Copyright 2006, 2007, 2008, 2009, 2010, 2012
!!$ 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_spge_dot.f90
! Function: X_spge_dot
!
! Compute the dot product between a sparse vector and a dense vector.
!
function psb_s_spge_dot(nv1,iv1,v1,v2) result(dot)
use psb_const_mod
integer(psb_ipk_), intent(in) :: nv1
integer(psb_ipk_), intent(in) :: iv1(*)
real(psb_spk_), intent(in) :: v1(*),v2(*)
real(psb_spk_) :: dot
integer(psb_ipk_) :: i,j,k, ip1, ip2
dot = szero
ip1 = 1
do i=1, nv1
dot = dot + v1(i)*v2(iv1(i))
end do
end function psb_s_spge_dot
function psb_d_spge_dot(nv1,iv1,v1,v2) result(dot)
use psb_const_mod
integer(psb_ipk_), intent(in) :: nv1
integer(psb_ipk_), intent(in) :: iv1(*)
real(psb_dpk_), intent(in) :: v1(*),v2(*)
real(psb_dpk_) :: dot
integer(psb_ipk_) :: i,j,k, ip1, ip2
dot = dzero
do i=1, nv1
dot = dot + v1(i)*v2(iv1(i))
end do
end function psb_d_spge_dot
function psb_c_spge_dot(nv1,iv1,v1,v2) result(dot)
use psb_const_mod
integer(psb_ipk_), intent(in) :: nv1
integer(psb_ipk_), intent(in) :: iv1(*)
complex(psb_spk_), intent(in) :: v1(*),v2(*)
complex(psb_spk_) :: dot
integer(psb_ipk_) :: i,j,k, ip1, ip2
dot = czero
do i=1, nv1
dot = dot + v1(i)*v2(iv1(i))
end do
end function psb_c_spge_dot
function psb_z_spge_dot(nv1,iv1,v1,v2) result(dot)
use psb_const_mod
integer(psb_ipk_), intent(in) :: nv1
integer(psb_ipk_), intent(in) :: iv1(*)
complex(psb_dpk_), intent(in) :: v1(*),v2(*)
complex(psb_dpk_) :: dot
integer(psb_ipk_) :: i,j,k, ip1, ip2
dot = zzero
do i=1, nv1
dot = dot + v1(i)*v2(iv1(i))
end do
end function psb_z_spge_dot