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225 lines
5.8 KiB
Fortran
225 lines
5.8 KiB
Fortran
!
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! Parallel Sparse BLAS version 3.5
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! (C) Copyright 2006-2018
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! Salvatore Filippone
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! Alfredo Buttari
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!
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! Redistribution and use in source and binary forms, with or without
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! modification, are permitted provided that the following conditions
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! are met:
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! 1. Redistributions of source code must retain the above copyright
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! notice, this list of conditions and the following disclaimer.
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! 2. Redistributions in binary form must reproduce the above copyright
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! notice, this list of conditions, and the following disclaimer in the
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! documentation and/or other materials provided with the distribution.
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! 3. The name of the PSBLAS group or the names of its contributors may
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! not be used to endorse or promote products derived from this
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! software without specific written permission.
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!
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! THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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! ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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! TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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! PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE PSBLAS GROUP OR ITS CONTRIBUTORS
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! BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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! CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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! SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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! INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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! CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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! ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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! POSSIBILITY OF SUCH DAMAGE.
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!
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!
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subroutine psb_s_aspxpby(alpha, nx, ix, x, beta, y, info)
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use psb_const_mod
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integer(psb_ipk_), intent(in) :: nx
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integer(psb_ipk_), intent(in) :: ix(:)
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real(psb_spk_), intent (in) :: x(:)
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real(psb_spk_), intent (inout) :: y(:)
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real(psb_spk_), intent (in) :: alpha, beta
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integer(psb_ipk_), intent(out) :: info
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integer(psb_ipk_) :: i, ip
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info=psb_success_
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if (nx > max(size(ix),size(x))) then
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info = -2
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return
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end if
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if (beta /= sone) then
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if (beta == -sone) then
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y(:) = -y(:)
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else if (beta == szero) then
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y(:) = szero
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else
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y(:) = beta * y(:)
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end if
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end if
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if (alpha == szero) return
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if (alpha == sone) then
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do i=1, nx
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ip = ix(i)
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y(ip) = y(ip) + x(i)
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end do
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else if (alpha == -sone) then
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do i=1, nx
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ip = ix(i)
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y(ip) = y(ip) - x(i)
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end do
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else
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do i=1, nx
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ip = ix(i)
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y(ip) = y(ip) + alpha*x(i)
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end do
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end if
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end subroutine psb_s_aspxpby
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subroutine psb_d_aspxpby(alpha, nx, ix, x, beta, y, info)
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use psb_const_mod
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integer(psb_ipk_), intent(in) :: nx
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integer(psb_ipk_), intent(in) :: ix(:)
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real(psb_dpk_), intent (in) :: x(:)
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real(psb_dpk_), intent (inout) :: y(:)
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real(psb_dpk_), intent (in) :: alpha, beta
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integer(psb_ipk_), intent(out) :: info
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integer(psb_ipk_) :: i, ip
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info=psb_success_
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if (nx > max(size(ix),size(x))) then
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info = -2
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return
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end if
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if (beta /= done) then
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if (beta == -done) then
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y(:) = -y(:)
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else if (beta == dzero) then
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y(:) = dzero
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else
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y(:) = beta * y(:)
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end if
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end if
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if (alpha == dzero) return
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if (alpha == done) then
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do i=1, nx
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ip = ix(i)
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y(ip) = y(ip) + x(i)
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end do
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else if (alpha == -done) then
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do i=1, nx
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ip = ix(i)
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y(ip) = y(ip) - x(i)
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end do
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else
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do i=1, nx
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ip = ix(i)
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y(ip) = y(ip) + alpha*x(i)
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end do
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end if
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end subroutine psb_d_aspxpby
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subroutine psb_c_aspxpby(alpha, nx, ix, x, beta, y, info)
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use psb_const_mod
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integer(psb_ipk_), intent(in) :: nx
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integer(psb_ipk_), intent(in) :: ix(:)
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complex(psb_spk_), intent (in) :: x(:)
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complex(psb_spk_), intent (inout) :: y(:)
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complex(psb_spk_), intent (in) :: alpha, beta
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integer(psb_ipk_), intent(out) :: info
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integer(psb_ipk_) :: i, ip
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info=psb_success_
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if (nx > max(size(ix),size(x))) then
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info = -2
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return
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end if
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if (beta /= cone) then
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if (beta == -cone) then
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y(:) = -y(:)
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else if (beta == czero) then
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y(:) = czero
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else
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y(:) = beta * y(:)
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end if
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end if
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if (alpha == czero) return
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if (alpha == cone) then
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do i=1, nx
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ip = ix(i)
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y(ip) = y(ip) + x(i)
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end do
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else if (alpha == -cone) then
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do i=1, nx
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ip = ix(i)
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y(ip) = y(ip) - x(i)
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end do
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else
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do i=1, nx
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ip = ix(i)
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y(ip) = y(ip) + alpha*x(i)
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end do
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end if
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end subroutine psb_c_aspxpby
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subroutine psb_z_aspxpby(alpha, nx, ix, x, beta, y, info)
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use psb_const_mod
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integer(psb_ipk_), intent(in) :: nx
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integer(psb_ipk_), intent(in) :: ix(:)
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complex(psb_dpk_), intent (in) :: x(:)
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complex(psb_dpk_), intent (inout) :: y(:)
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complex(psb_dpk_), intent (in) :: alpha, beta
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integer(psb_ipk_), intent(out) :: info
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integer(psb_ipk_) :: i, ip
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info=psb_success_
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if (nx > max(size(ix),size(x))) then
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info = -2
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return
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end if
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if (beta /= zone) then
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if (beta == -zone) then
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y(:) = -y(:)
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else if (beta == zzero) then
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y(:) = zzero
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else
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y(:) = beta * y(:)
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end if
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end if
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if (alpha == zzero) return
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if (alpha == zone) then
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do i=1, nx
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ip = ix(i)
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y(ip) = y(ip) + x(i)
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end do
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else if (alpha == -zone) then
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do i=1, nx
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ip = ix(i)
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y(ip) = y(ip) - x(i)
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end do
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else
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do i=1, nx
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ip = ix(i)
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y(ip) = y(ip) + alpha*x(i)
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end do
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end if
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end subroutine psb_z_aspxpby
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