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202 lines
4.8 KiB
Fortran
202 lines
4.8 KiB
Fortran
subroutine mld_s_diag_solver_apply(alpha,sv,x,beta,y,desc_data,trans,work,info)
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use psb_base_mod
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use mld_s_diag_solver, mld_protect_name => mld_s_diag_solver_apply
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implicit none
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type(psb_desc_type), intent(in) :: desc_data
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class(mld_s_diag_solver_type), intent(in) :: sv
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real(psb_spk_), intent(inout) :: 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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character(len=1),intent(in) :: trans
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real(psb_spk_),target, intent(inout) :: work(:)
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integer, intent(out) :: info
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integer :: n_row,n_col
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real(psb_spk_), pointer :: ww(:), aux(:), tx(:),ty(:)
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integer :: ictxt,np,me,i, err_act
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character :: trans_
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character(len=20) :: name='s_diag_solver_apply'
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call psb_erractionsave(err_act)
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info = psb_success_
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trans_ = psb_toupper(trans)
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select case(trans_)
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case('N')
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case('T','C')
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case default
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call psb_errpush(psb_err_iarg_invalid_i_,name)
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goto 9999
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end select
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n_row = desc_data%get_local_rows()
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n_col = desc_data%get_local_cols()
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if (trans_ == 'C') then
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if (beta == szero) then
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if (alpha == szero) then
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y(1:n_row) = szero
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else if (alpha == sone) then
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do i=1, n_row
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y(i) = (sv%d(i)) * x(i)
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end do
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else if (alpha == -sone) then
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do i=1, n_row
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y(i) = -(sv%d(i)) * x(i)
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end do
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else
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do i=1, n_row
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y(i) = alpha * (sv%d(i)) * x(i)
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end do
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end if
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else if (beta == sone) then
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if (alpha == szero) then
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!y(1:n_row) = szero
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else if (alpha == sone) then
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do i=1, n_row
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y(i) = (sv%d(i)) * x(i) + y(i)
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end do
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else if (alpha == -sone) then
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do i=1, n_row
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y(i) = -(sv%d(i)) * x(i) + y(i)
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end do
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else
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do i=1, n_row
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y(i) = alpha * (sv%d(i)) * x(i) + y(i)
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end do
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end if
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else if (beta == -sone) then
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if (alpha == szero) then
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y(1:n_row) = -y(1:n_row)
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else if (alpha == sone) then
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do i=1, n_row
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y(i) = (sv%d(i)) * x(i) - y(i)
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end do
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else if (alpha == -sone) then
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do i=1, n_row
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y(i) = -(sv%d(i)) * x(i) - y(i)
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end do
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else
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do i=1, n_row
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y(i) = alpha * (sv%d(i)) * x(i) - y(i)
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end do
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end if
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else
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if (alpha == szero) then
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y(1:n_row) = beta *y(1:n_row)
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else if (alpha == sone) then
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do i=1, n_row
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y(i) = (sv%d(i)) * x(i) + beta*y(i)
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end do
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else if (alpha == -sone) then
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do i=1, n_row
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y(i) = -(sv%d(i)) * x(i) + beta*y(i)
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end do
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else
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do i=1, n_row
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y(i) = alpha * (sv%d(i)) * x(i) + beta*y(i)
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end do
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end if
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end if
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else if (trans_ /= 'C') then
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if (beta == szero) then
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if (alpha == szero) then
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y(1:n_row) = szero
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else if (alpha == sone) then
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do i=1, n_row
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y(i) = sv%d(i) * x(i)
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end do
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else if (alpha == -sone) then
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do i=1, n_row
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y(i) = -sv%d(i) * x(i)
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end do
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else
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do i=1, n_row
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y(i) = alpha * sv%d(i) * x(i)
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end do
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end if
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else if (beta == sone) then
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if (alpha == szero) then
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!y(1:n_row) = szero
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else if (alpha == sone) then
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do i=1, n_row
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y(i) = sv%d(i) * x(i) + y(i)
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end do
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else if (alpha == -sone) then
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do i=1, n_row
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y(i) = -sv%d(i) * x(i) + y(i)
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end do
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else
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do i=1, n_row
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y(i) = alpha * sv%d(i) * x(i) + y(i)
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end do
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end if
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else if (beta == -sone) then
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if (alpha == szero) then
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y(1:n_row) = -y(1:n_row)
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else if (alpha == sone) then
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do i=1, n_row
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y(i) = sv%d(i) * x(i) - y(i)
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end do
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else if (alpha == -sone) then
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do i=1, n_row
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y(i) = -sv%d(i) * x(i) - y(i)
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end do
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else
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do i=1, n_row
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y(i) = alpha * sv%d(i) * x(i) - y(i)
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end do
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end if
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else
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if (alpha == szero) then
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y(1:n_row) = beta *y(1:n_row)
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else if (alpha == sone) then
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do i=1, n_row
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y(i) = sv%d(i) * x(i) + beta*y(i)
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end do
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else if (alpha == -sone) then
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do i=1, n_row
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y(i) = -sv%d(i) * x(i) + beta*y(i)
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end do
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else
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do i=1, n_row
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y(i) = alpha * sv%d(i) * x(i) + beta*y(i)
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end do
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end if
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end if
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end if
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call psb_erractionrestore(err_act)
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return
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9999 continue
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call psb_erractionrestore(err_act)
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if (err_act == psb_act_abort_) then
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call psb_error()
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return
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end if
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return
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end subroutine mld_s_diag_solver_apply
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