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psblas3/base/serial/psi_s_serial_impl.f90

397 lines
7.6 KiB
Fortran

subroutine psi_saxpby(m,n,alpha, x, beta, y, info)
use psb_const_mod
use psb_error_mod
implicit none
integer(psb_ipk_), intent(in) :: m, n
real(psb_spk_), intent (in) :: x(:,:)
real(psb_spk_), intent (inout) :: y(:,:)
real(psb_spk_), intent (in) :: alpha, beta
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_) :: err_act
integer(psb_ipk_) :: lx, ly
integer(psb_ipk_) :: ierr(5)
character(len=20) :: name, ch_err
name='psb_geaxpby'
if(psb_get_errstatus() /= 0) return
info=psb_success_
call psb_erractionsave(err_act)
if (m < 0) then
info = psb_err_iarg_neg_
ierr(1) = 1; ierr(2) = m
call psb_errpush(info,name,i_err=ierr)
goto 9999
end if
if (n < 0) then
info = psb_err_iarg_neg_
ierr(1) = 2; ierr(2) = n
call psb_errpush(info,name,i_err=ierr)
goto 9999
end if
lx = size(x,1)
ly = size(y,1)
if (lx < m) then
info = psb_err_input_asize_small_i_
ierr(1) = 4; ierr(2) = m
call psb_errpush(info,name,i_err=ierr)
goto 9999
end if
if (ly < m) then
info = psb_err_input_asize_small_i_
ierr(1) = 6; ierr(2) = m
call psb_errpush(info,name,i_err=ierr)
goto 9999
end if
if ((m>0).and.(n>0)) call saxpby(m,n,alpha,x,lx,beta,y,ly,info)
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
end subroutine psi_saxpby
subroutine psi_saxpbyv(m,alpha, x, beta, y, info)
use psb_const_mod
use psb_error_mod
implicit none
integer(psb_ipk_), intent(in) :: m
real(psb_spk_), intent (in) :: x(:)
real(psb_spk_), intent (inout) :: y(:)
real(psb_spk_), intent (in) :: alpha, beta
integer(psb_ipk_), intent(out) :: info
integer(psb_ipk_) :: err_act
integer(psb_ipk_) :: lx, ly
integer(psb_ipk_) :: ierr(5)
character(len=20) :: name, ch_err
name='psb_geaxpby'
if(psb_get_errstatus() /= 0) return
info=psb_success_
call psb_erractionsave(err_act)
if (m < 0) then
info = psb_err_iarg_neg_
ierr(1) = 1; ierr(2) = m
call psb_errpush(info,name,i_err=ierr)
goto 9999
end if
lx = size(x,1)
ly = size(y,1)
if (lx < m) then
info = psb_err_input_asize_small_i_
ierr(1) = 3; ierr(2) = m
call psb_errpush(info,name,i_err=ierr)
goto 9999
end if
if (ly < m) then
info = psb_err_input_asize_small_i_
ierr(1) = 5; ierr(2) = m
call psb_errpush(info,name,i_err=ierr)
goto 9999
end if
if (m>0) call saxpby(m,ione,alpha,x,lx,beta,y,ly,info)
call psb_erractionrestore(err_act)
return
9999 call psb_error_handler(err_act)
return
end subroutine psi_saxpbyv
subroutine psi_sgthmv(n,k,idx,alpha,x,beta,y)
use psb_const_mod
implicit none
integer(psb_ipk_) :: n, k, idx(:)
real(psb_spk_) :: x(:,:), y(:),alpha,beta
! Locals
integer(psb_ipk_) :: i, j, pt
if (beta == szero) then
if (alpha == szero) then
pt=0
do j=1,k
do i=1,n
pt=pt+1
y(pt) = szero
end do
end do
else if (alpha == sone) then
pt=0
do j=1,k
do i=1,n
pt=pt+1
y(pt) = x(idx(i),j)
end do
end do
else if (alpha == -sone) then
pt=0
do j=1,k
do i=1,n
pt=pt+1
y(pt) = -x(idx(i),j)
end do
end do
else
pt=0
do j=1,k
do i=1,n
pt=pt+1
y(pt) = alpha*x(idx(i),j)
end do
end do
end if
else
if (beta == sone) then
! Do nothing
else if (beta == -sone) then
y(1:n*k) = -y(1:n*k)
else
y(1:n*k) = beta*y(1:n*k)
end if
if (alpha == szero) then
! do nothing
else if (alpha == sone) then
pt=0
do j=1,k
do i=1,n
pt=pt+1
y(pt) = y(pt) + x(idx(i),j)
end do
end do
else if (alpha == -sone) then
pt=0
do j=1,k
do i=1,n
pt=pt+1
y(pt) = y(pt) - x(idx(i),j)
end do
end do
else
pt=0
do j=1,k
do i=1,n
pt=pt+1
y(pt) = y(pt) + alpha*x(idx(i),j)
end do
end do
end if
end if
end subroutine psi_sgthmv
subroutine psi_sgthv(n,idx,alpha,x,beta,y)
use psb_const_mod
implicit none
integer(psb_ipk_) :: n, idx(:)
real(psb_spk_) :: x(:), y(:),alpha,beta
! Locals
integer(psb_ipk_) :: i
if (beta == szero) then
if (alpha == szero) then
do i=1,n
y(i) = szero
end do
else if (alpha == sone) then
do i=1,n
y(i) = x(idx(i))
end do
else if (alpha == -sone) then
do i=1,n
y(i) = -x(idx(i))
end do
else
do i=1,n
y(i) = alpha*x(idx(i))
end do
end if
else
if (beta == sone) then
! Do nothing
else if (beta == -sone) then
y(1:n) = -y(1:n)
else
y(1:n) = beta*y(1:n)
end if
if (alpha == szero) then
! do nothing
else if (alpha == sone) then
do i=1,n
y(i) = y(i) + x(idx(i))
end do
else if (alpha == -sone) then
do i=1,n
y(i) = y(i) - x(idx(i))
end do
else
do i=1,n
y(i) = y(i) + alpha*x(idx(i))
end do
end if
end if
end subroutine psi_sgthv
subroutine psi_sgthzmm(n,k,idx,x,y)
use psb_const_mod
implicit none
integer(psb_ipk_) :: n, k, idx(:)
real(psb_spk_) :: x(:,:), y(:,:)
! Locals
integer(psb_ipk_) :: i
do i=1,n
y(i,1:k)=x(idx(i),1:k)
end do
end subroutine psi_sgthzmm
subroutine psi_sgthzmv(n,k,idx,x,y)
use psb_const_mod
implicit none
integer(psb_ipk_) :: n, k, idx(:)
real(psb_spk_) :: x(:,:), y(:)
! Locals
integer(psb_ipk_) :: i, j, pt
pt=0
do j=1,k
do i=1,n
pt=pt+1
y(pt)=x(idx(i),j)
end do
end do
end subroutine psi_sgthzmv
subroutine psi_sgthzv(n,idx,x,y)
use psb_const_mod
implicit none
integer(psb_ipk_) :: n, idx(:)
real(psb_spk_) :: x(:), y(:)
! Locals
integer(psb_ipk_) :: i
do i=1,n
y(i)=x(idx(i))
end do
end subroutine psi_sgthzv
subroutine psi_ssctmm(n,k,idx,x,beta,y)
use psb_const_mod
implicit none
integer(psb_ipk_) :: n, k, idx(:)
real(psb_spk_) :: beta, x(:,:), y(:,:)
! Locals
integer(psb_ipk_) :: i, j
if (beta == szero) then
do i=1,n
y(idx(i),1:k) = x(i,1:k)
end do
else if (beta == sone) then
do i=1,n
y(idx(i),1:k) = y(idx(i),1:k)+x(i,1:k)
end do
else
do i=1,n
y(idx(i),1:k) = beta*y(idx(i),1:k)+x(i,1:k)
end do
end if
end subroutine psi_ssctmm
subroutine psi_ssctmv(n,k,idx,x,beta,y)
use psb_const_mod
implicit none
integer(psb_ipk_) :: n, k, idx(:)
real(psb_spk_) :: beta, x(:), y(:,:)
! Locals
integer(psb_ipk_) :: i, j, pt
if (beta == szero) then
pt=0
do j=1,k
do i=1,n
pt=pt+1
y(idx(i),j) = x(pt)
end do
end do
else if (beta == sone) then
pt=0
do j=1,k
do i=1,n
pt=pt+1
y(idx(i),j) = y(idx(i),j)+x(pt)
end do
end do
else
pt=0
do j=1,k
do i=1,n
pt=pt+1
y(idx(i),j) = beta*y(idx(i),j)+x(pt)
end do
end do
end if
end subroutine psi_ssctmv
subroutine psi_ssctv(n,idx,x,beta,y)
use psb_const_mod
implicit none
integer(psb_ipk_) :: n, idx(:)
real(psb_spk_) :: beta, x(:), y(:)
! Locals
integer(psb_ipk_) :: i
if (beta == szero) then
do i=1,n
y(idx(i)) = x(i)
end do
else if (beta == sone) then
do i=1,n
y(idx(i)) = y(idx(i))+x(i)
end do
else
do i=1,n
y(idx(i)) = beta*y(idx(i))+x(i)
end do
end if
end subroutine psi_ssctv