! (C) Copyright 2001- ECMWF. ! (C) Copyright 2001- Meteo-France. ! ! This software is licensed under the terms of the Apache Licence Version 2.0 ! which can be obtained at http://www.apache.org/licenses/LICENSE-2.0. ! In applying this licence, ECMWF does not waive the privileges and immunities ! granted to it by virtue of its status as an intergovernmental organisation ! nor does it submit to any jurisdiction. ! MODULE ELEINVAD_MOD CONTAINS SUBROUTINE ELEINVAD(KM,KFC,KF_OUT_LT,PIA) !**** *ELEINVAD* - Inverse Legendre transform. ! Purpose. ! -------- ! Inverse Legendre tranform of all variables(kernel). !** Interface. ! ---------- ! CALL ELEINVAD(...) ! Explicit arguments : KM - zonal wavenumber (input-c) ! -------------------- KFC - number of fields to tranform (input-c) ! PIA - spectral fields ! for zonal wavenumber KM (input) ! PAOA1 - antisymmetric part of Fourier ! fields for zonal wavenumber KM (output) ! PSOA1 - symmetric part of Fourier ! fields for zonal wavenumber KM (output) ! PLEPO - Legendre polonomials for zonal ! wavenumber KM (input-c) ! Implicit arguments : None. ! -------------------- ! Method. ! ------- ! Externals. MXMAOP - calls SGEMVX (matrix multiply) ! ---------- ! Reference. ! ---------- ! ECMWF Research Department documentation of the IFS ! Author. ! ------- ! Mats Hamrud and Philippe Courtier *ECMWF* ! Modifications. ! -------------- ! Original : 00-02-01 From LEINVAD in IFS CY22R1 ! M.Hamrud 01-Oct-2003 CY28 Cleaning ! D. Degrauwe (Feb 2012): Alternative extension zone (E') ! R. El Khatib 01-Sep-2015 support for FFTW transforms ! R. El Khatib 08-Jun-2023 LALL_FFTW for better flexibility ! ------------------------------------------------------------------ USE PARKIND1 ,ONLY : JPIM ,JPRB USE YOMHOOK ,ONLY : LHOOK, DR_HOOK, JPHOOK USE TPM_DIM ,ONLY : R !USE TPM_GEOMETRY !USE TPM_TRANS USE TPM_FFTW ,ONLY : TW, EXEC_EFFTW USE TPMALD_DIM ,ONLY : RALD #ifdef WITH_FFT992 USE TPMALD_FFT ,ONLY : TALD #endif USE ABORT_TRANS_MOD ,ONLY : ABORT_TRANS ! IMPLICIT NONE INTEGER(KIND=JPIM), INTENT(IN) :: KM INTEGER(KIND=JPIM), INTENT(IN) :: KFC INTEGER(KIND=JPIM), INTENT(IN) :: KF_OUT_LT REAL(KIND=JPRB), INTENT(OUT) :: PIA(:,:) INTEGER(KIND=JPIM) :: IRLEN, ICLEN, IOFF, ITYPE INTEGER(KIND=JPIM) :: JJ, JF REAL(KIND=JPRB) :: ZNORM REAL(KIND=JPHOOK) :: ZHOOK_HANDLE ! ------------------------------------------------------------------ IF (LHOOK) CALL DR_HOOK('ELEINVAD_MOD:ELEINVAD',0,ZHOOK_HANDLE) IF (KFC>0) THEN ITYPE=-1 IRLEN=R%NDGL+R%NNOEXTZG ICLEN=RALD%NDGLSUR+R%NNOEXTZG #ifdef WITH_FFT992 IF( TALD%LFFT992 )THEN CALL FFT992(PIA,TALD%TRIGSE,TALD%NFAXE,1,ICLEN,IRLEN,KFC,ITYPE) ELSE #endif IOFF=1 CALL EXEC_EFFTW(ITYPE,IRLEN,ICLEN,IOFF,KFC,TW%LALL_FFTW,PIA) #ifdef WITH_FFT992 ENDIF #endif ZNORM=2.0_JPRB*REAL(R%NDGL+R%NNOEXTZG,JPRB) DO JJ=1,1 DO JF=1,KFC PIA(JJ,JF) = (ZNORM/2.0_JPRB) * PIA(JJ,JF) ENDDO ENDDO DO JJ=3,R%NDGL+R%NNOEXTZG+1 DO JF=1,KFC PIA(JJ,JF) = ZNORM * PIA(JJ,JF) ENDDO ENDDO ENDIF IF (LHOOK) CALL DR_HOOK('ELEINVAD_MOD:ELEINVAD',1,ZHOOK_HANDLE) ! ------------------------------------------------------------------ END SUBROUTINE ELEINVAD END MODULE ELEINVAD_MOD