!-------------------------------------- LICENCE BEGIN ------------------------------------
!Environment Canada - Atmospheric Science and Technology License/Disclaimer,
! version 3; Last Modified: May 7, 2008.
!This is free but copyrighted software; you can use/redistribute/modify it under the terms
!of the Environment Canada - Atmospheric Science and Technology License/Disclaimer
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!
!This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
!without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
!See the above mentioned License/Disclaimer for more details.
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!-------------------------------------- LICENCE END --------------------------------------
***s/r hzd_solfft_1d - parallel direct solution of 1D high-order diffusion
* equation with ffft8 (based on HZD_SOLFFT, A.Qaddouri)
#include "model_macros_f.h"
*
subroutine hzd_solfft_1d (F_sol, F_Rhs_8, F_pri_8, F_deltai_8, 3
% minx1, maxx1, minx2, maxx2, nx1, nx2, nx3, F_pwr,
% minx,maxx,miny,maxy,gnk,gni,nil,njl,nkl,
% F_opsxp0_8, F_opsyp0_8,F_cdiff,F_npex,F_npey)
*
implicit none
*
integer minx1, maxx1, minx2, maxx2 , nx1, nx2, nx3, F_pwr,
$ minx , maxx , miny , maxy , gnk, gni,
$ njl , nkl , nil , F_npex, F_npey
real*8 F_opsxp0_8(*), F_opsyp0_8(*), F_pri_8,
$ F_deltai_8(1:F_pwr,1:F_pwr,1:gni,nx3),F_Rhs_8
real F_cdiff, F_sol(minx:maxx,miny:maxy,gnk)
*
*author
* M.Tanguay
*
*revision
* v3_20 - Tanguay M. - initial version
* v3_21 - Tanguay M. - Revision Openmp
*
*object
* see id section
*
*arguments
* Name I/O Description
*----------------------------------------------------------------
* F_sol I/O r.h.s. and result of horizontal diffusion
* F_Rhs_8 I work vector
*----------------------------------------------------------------
*
**
#include "ptopo.cdk"
real*8 fdg1_8( miny:maxy, minx1:maxx1,gni+ F_npex),
$ fwft_8( miny:maxy ,minx1:maxx1,gni+2+F_npex)
*
real*8 ZERO_8, fact_8
parameter( ZERO_8 = 0.0 )
*
integer o1,o2,i,j,k,jw,offj,indy
*
* __________________________________________________________________
*
*
* ----------
* Resolution
* ----------
*
fact_8=((-1)**F_pwr)*dble(F_cdiff)
call rpn_comm_transpose48 ( F_sol, Minx, Maxx, Gni,1, (Maxy-Miny+1),
% (Maxy-Miny+1),minx1, maxx1, Gnk, fdg1_8, 1,
% fact_8,0.d0)
*
!$omp parallel private(indy)
!$omp do
do i = 1, Gni
do k = 1, Nkl
do j= njl+1,maxy
fwft_8(j,k,i) = ZERO_8
enddo
enddo
*
do k= Nkl+1, maxx1
do j= miny,maxy
fwft_8(j,k,i) = ZERO_8
enddo
enddo
*
do k=1,nkl
do j= miny,0
fwft_8(j,k,i) = ZERO_8
enddo
do j=1,njl
fwft_8(j,k,i) = F_opsxp0_8(gni+i)*fdg1_8(j,k,i)
enddo
enddo
enddo
!$omp enddo
!$omp do
do i= 1,gni+2
do k=minx1,0
do j= miny,maxy
fwft_8(j,k,i) = ZERO_8
enddo
enddo
enddo
!$omp enddo
*
* projection ( wfft = x transposed * g )
* --------------------------------------
*
!$omp do
do k=1,Nkl
call ffft8 (fwft_8(miny,k,1),(Maxy-Miny+1)*(maxx1-minx1+1),
% 1, (Maxy-Miny+1) , -1 )
enddo
!$omp enddo
*
!$omp do
do i = 0, (Gni)/2
do k = 1, Nkl
*JJ do jw = 1, (Maxy-Miny+1)
do jw = 1, njl
fwft_8(jw,k,2*i+1) = F_pri_8 * fwft_8(jw,k,2*i+1)
fwft_8(jw,k,2*i+2) = F_pri_8 * fwft_8(jw,k,2*i+2)
enddo
enddo
enddo
!$omp enddo
!$omp do
do k = 1, Nkl
do j = 1, (Maxy-Miny+1)
fwft_8(j,k,Gni+2) = ZERO_8
fwft_8(j,k,2) = fwft_8(j,k,1)
enddo
enddo
!$omp enddo
*
* Scaling only (WE DO NOT RESOLVE A TRIDIAGONAL MATRIX in Y)
* ----------------------------------------------------------
*
offj = Ptopo_gindx(3,Ptopo_myproc+1)-1
*
!$omp do
do i = 1,gni
do k = 1,nkl
do j = 1,njl
indy = offj + j
fdg1_8(j,k,i)=F_deltai_8(F_pwr,1,i,indy)*
% (F_opsyp0_8(nx3+indy)*fwft_8(j,k,i+1))
enddo
enddo
enddo
!$omp enddo
*
* inverse projection ( r = x * w )
* --------------------------------
*
!$omp do
do i = 1, Gni
do k = 1, nkl
do j=1,njl
fwft_8(j,k,i+1) = fdg1_8(j,k,i)
enddo
enddo
enddo
!$omp enddo
!$omp do
do k = 1, nkl
do j = 1, (Maxy-Miny+1)
fwft_8(j,k,1) = fwft_8(j,k,2)
fwft_8(j,k,2) = ZERO_8
fwft_8(j,k,Gni+2) = ZERO_8
enddo
enddo
!$omp enddo
*
!$omp do
do k=1,Nkl
call ffft8 (fwft_8(Miny,k,1),(Maxy-Miny+1)*(maxx1-minx1+1),1,
% (Maxy-Miny+1), +1 )
enddo
!$omp enddo
!$omp end parallel
call rpn_comm_transpose48 ( F_sol, Minx, Maxx, Gni,1, (Maxy-Miny+1),
% (Maxy-Miny+1),minx1, maxx1, Gnk, fwft_8, -1,
% 1.d0,0.d0)
*
* __________________________________________________________________
*
return
end