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.
psblas3/base/serial/psb_spge_dot.f90

105 lines
3.3 KiB
Fortran

!
! Parallel Sparse BLAS version 3.5
! (C) Copyright 2006, 2010, 2015, 2017
! Salvatore Filippone Cranfield University
! 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