SUBROUTINE ZLEGINV(PF,PN,PLEG,DDWT,KTRUNC,KNJ,KLEV 1
     S     ,KNJDIM,KLEVDIM,KNDIM)
#if defined (DOC)
*
***s/r ZLEGINV  - Direct Legendre transform restricted to
*     .           fields that vary with latitude only
*
*Author  : P. Gauthier *ARMA/AES  February 1997
*Revision:
*          JM Belanger CMDA/SMC  Aug 2000
*                   . 32 bits conversion
*                    (MXMA8 instead of MXMA)
*          Y. Yang Nov 2004
*                   . Changed dimensions of PF and PN from (*, 4*KLEVDIM) to
*                     (*, KLEV) to be consistent with the changes in the
*                     calling routine (convol.ftn)
*          Bin He     *ARMA/MRB*   NOV. 2011. 
*                . Replaced MXMA8 with DGEMUL of ESSL.  
*
*Arguments
*     o   PF(KNJDIM,KLEVDIM)  : field in physical space
*     i   PN(0:KNDIM, KLEVDIM): spectral coefficients
*     i   PLEG(0:KNDIM,KNJDIM): Legendre functions evaluated at the KNJ Gaussian
*     .                         latitudes
*     i   DDWT(KNJDIM)         : weights of the Gaussian quadrature
*     i   KNJ                 : number of Gaussian latitudes
*     i   KTRUNC              : spectral truncation
*     i   KLEV                : number of fields to transform
*     i   KNJDIM              : dimensioning of the field (in latitude)
*     i   KLEVDIM             : dimensioning of the field (in KLEV)
*     I   KNDIM               : dimensioning of the field (in KTRUNC)
#endif
      IMPLICIT NONE
*
*     Arguments
*
      INTEGER KNJ, KLEV, KTRUNC, KNJDIM, KLEVDIM, KNDIM
      REAL*8    PF(KNJDIM,KLEV), PN(0:KNDIM, KLEV)
     S     ,  PLEG(0:KNDIM,KNJDIM)
      REAL*8 DDWT(KNJDIM)
*
*     Local variables
*
      INTEGER J, JN, ILEN, IERR
      REAL*8    ZWORK(0:KTRUNC,KNJ)
      POINTER (PXWORK,ZWORK)
*
*     0. Allocate workspace
*
      ILEN = KNJ*(KTRUNC+1)
      CALL HPALLOC(PXWORK,MAX(ILEN,1),IERR,8)
*
*     1. Prepare the matrix used for the transform
*
      DO J = 1, KNJ
         DO JN = 0,KTRUNC
            ZWORK(JN,J) = PLEG(JN,J)
         END DO
      END DO
*
*     2. Do the transform
*
!      CALL MXMA8(ZWORK(0,1),KTRUNC+1,1,PN(0,1),1,KNDIM+1
!     S     ,PF(1,1),1,KNJDIM,KNJ,KTRUNC+1,KLEV)

       CALL DGEMUL(ZWORK(0,1),KTRUNC+1,'T',PN(0,1),KNDIM+1,'N',
     +    PF(1,1),KNJDIM,KNJ,KTRUNC+1,KLEV) 
*
*     9. Deallocate local arrays
*
      CALL HPDEALLC(PXWORK,IERR,1)
*
      RETURN
      END