--- trunk/libf/dyn3d/gradiv2.f90	2011/12/06 15:07:04	54
+++ trunk/libf/dyn3d/Dissipation/gradiv2.f90	2012/01/30 12:54:02	57
@@ -4,64 +4,62 @@
 
 contains
 
-  SUBROUTINE gradiv2(klevel, xcov, ycov, ld, gdx, gdy, cdivu)
+  SUBROUTINE gradiv2(xcov, ycov, ld, gdx, gdy, cdivu)
 
     ! From LMDZ4/libf/dyn3d/gradiv2.F, version 1.1.1.1 2004/05/19 12:53:07
-
     ! P. Le Van
-    ! calcul de grad div du vecteur v
-    ! xcov et ycov etant les composantes covariantes de v
-    ! xcont, ycont et ld sont des arguments d'entree pour le sous-programme
-    ! gdx et gdy sont des arguments de sortie pour le sous-programme
-
-    use dimens_m
-    use paramet_m
-    use comgeom
-    use filtreg_m, only: filtreg
+    ! Calcul de grad div du vecteur v.
 
-    ! variables en arguments 
+    USE dimens_m, ONLY : iim, jjm, llm
+    use divergf_m, only: divergf
+    USE comgeom, ONLY : cuvscvgam1, cvuscugam1, unsair_gam1, unsapolnga1, &
+         unsapolsga1
+    USE filtreg_m, ONLY : filtreg
+    use nr_util, only: assert_eq, assert
+
+    ! Composantes covariantes de v :
+    REAL, intent(in):: xcov(:, :, :) ! (iim + 1, jjm + 1, klevel)
+    REAL, intent(in):: ycov(:, :, :) ! (iim + 1, jjm, klevel)
 
-    INTEGER klevel
-    REAL xcov( ip1jmp1,klevel), ycov( ip1jm,klevel)
     integer, intent(in):: ld
-    REAL gdx( ip1jmp1,klevel), gdy( ip1jm,klevel)
+    REAL, intent(out):: gdx(:, :, :) ! (iim + 1, jjm + 1, klevel)
+    REAL, intent(out):: gdy(:, :, :) ! (iim + 1, jjm, klevel)
     real, intent(in):: cdivu
 
-    ! variables locales
-
-    REAL div(ip1jmp1,llm)
-    REAL nugrads
-    INTEGER l,ij,iter
+    ! Variables locales :
+    REAL nugrads, div(iim + 1, jjm + 1, llm)
+    INTEGER iter, klevel
 
     !--------------------------------------------------------------
 
-    CALL SCOPY( ip1jmp1 * klevel, xcov, 1, gdx, 1)
-    CALL SCOPY( ip1jm * klevel, ycov, 1, gdy, 1)
+    call assert((/size(xcov, 1), size(ycov, 1), size(gdx, 1), size(gdy, 1)/) &
+         == iim + 1, "gradiv2 iim")
+    call assert((/size(xcov, 2) - 1, size(ycov, 2), size(gdx, 2) - 1, &
+         size(gdy, 2)/) == jjm, "gradiv2 iim")
+    klevel = assert_eq(size(xcov, 3), size(ycov, 3), size(gdx, 3), &
+         size(gdy, 3), "gradiv2 klevel")
+
+    gdx = xcov
+    gdy = ycov
 
-    CALL divergf( klevel, gdx, gdy, div)
+    CALL divergf(klevel, gdx, gdy, div)
 
-    IF( ld.GT.1) THEN
-       CALL laplacien ( klevel, div, div)
+    IF (ld > 1) THEN
+       CALL laplacien(klevel, div, div)
 
-       ! Iteration de l'operateur laplacien_gam
+       ! Itération de l'opérateur laplacien_gam
        DO iter = 1, ld -2
-          CALL laplacien_gam ( klevel,cuvscvgam1,cvuscugam1,unsair_gam1, &
+          CALL laplacien_gam(klevel, cuvscvgam1, cvuscugam1, unsair_gam1, &
                unsapolnga1, unsapolsga1, div, div)
-       ENDDO
+       END DO
     ENDIF
 
-    CALL filtreg( div, jjp1, klevel, 2, 1, .TRUE., 1)
-    CALL grad ( klevel, div, gdx, gdy)
+    CALL filtreg(div, jjm + 1, klevel, 2, 1, .TRUE., 1)
+    CALL grad(klevel, div, gdx, gdy)
     nugrads = (-1.)**ld * cdivu
 
-    DO l = 1, klevel
-       DO ij = 1, ip1jmp1
-          gdx( ij,l) = gdx( ij,l) * nugrads
-       ENDDO
-       DO ij = 1, ip1jm
-          gdy( ij,l) = gdy( ij,l) * nugrads
-       ENDDO
-    ENDDO
+    gdx = gdx * nugrads
+    gdy = gdy * nugrads
 
   END SUBROUTINE gradiv2