diff --git a/src/OCE/DYN/dynvor.F90 b/src/OCE/DYN/dynvor.F90
index b7a84124a27df69f6ea82b1622683c7a2be8470b..b90b4bc3e1aafee548fefd5bc7bb046e33825d53 100644
--- a/src/OCE/DYN/dynvor.F90
+++ b/src/OCE/DYN/dynvor.F90
@@ -943,6 +943,34 @@ CONTAINS
CALL ctl_stop('STOP','dyn_vor: wrong value for kvor' )
END SELECT
!
+#if defined key_loop_fusion
+ DO_2D( 0, 0, 0, 0 )
+ ! !== horizontal fluxes ==!
+ zwx = e2u(ji ,jj ) * e3u(ji ,jj ,jk,Kmm) * pu(ji ,jj ,jk)
+ zwx_im1 = e2u(ji-1,jj ) * e3u(ji-1,jj ,jk,Kmm) * pu(ji-1,jj ,jk)
+ zwx_jp1 = e2u(ji ,jj+1) * e3u(ji ,jj+1,jk,Kmm) * pu(ji ,jj+1,jk)
+ zwx_im1_jp1 = e2u(ji-1,jj+1) * e3u(ji-1,jj+1,jk,Kmm) * pu(ji-1,jj+1,jk)
+ zwy = e1v(ji ,jj ) * e3v(ji ,jj ,jk,Kmm) * pv(ji ,jj ,jk)
+ zwy_ip1 = e1v(ji+1,jj ) * e3v(ji+1,jj ,jk,Kmm) * pv(ji+1,jj ,jk)
+ zwy_jm1 = e1v(ji ,jj-1) * e3v(ji ,jj-1,jk,Kmm) * pv(ji ,jj-1,jk)
+ zwy_ip1_jm1 = e1v(ji+1,jj-1) * e3v(ji+1,jj-1,jk,Kmm) * pv(ji+1,jj-1,jk)
+ ! !== compute and add the vorticity term trend =!
+ ztne = zwz(ji-1,jj ) + zwz(ji ,jj ) + zwz(ji ,jj-1)
+ ztnw = zwz(ji-1,jj-1) + zwz(ji-1,jj ) + zwz(ji ,jj )
+ ztnw_ip1 = zwz(ji ,jj-1) + zwz(ji ,jj ) + zwz(ji+1,jj )
+ ztse = zwz(ji ,jj ) + zwz(ji ,jj-1) + zwz(ji-1,jj-1)
+ ztse_jp1 = zwz(ji ,jj+1) + zwz(ji ,jj ) + zwz(ji-1,jj )
+ ztsw_jp1 = zwz(ji ,jj ) + zwz(ji-1,jj ) + zwz(ji-1,jj+1)
+ ztsw_ip1 = zwz(ji+1,jj-1) + zwz(ji ,jj-1) + zwz(ji ,jj )
+ !
+ zua = + r1_12 * r1_e1u(ji,jj) * ( ztne * zwy + ztnw_ip1 * zwy_ip1 &
+ & + ztse * zwy_jm1 + ztsw_ip1 * zwy_ip1_jm1 )
+ zva = - r1_12 * r1_e2v(ji,jj) * ( ztsw_jp1 * zwx_im1_jp1 + ztse_jp1 * zwx_jp1 &
+ & + ztnw * zwx_im1 + ztne * zwx )
+ pu_rhs(ji,jj,jk) = pu_rhs(ji,jj,jk) + zua
+ pv_rhs(ji,jj,jk) = pv_rhs(ji,jj,jk) + zva
+ END_2D
+#else
! !== horizontal fluxes ==!
DO_2D( 1, 1, 1, 1 )
zwx(ji,jj) = e2u(ji,jj) * e3u(ji,jj,jk,Kmm) * pu(ji,jj,jk)
@@ -965,6 +993,7 @@ CONTAINS
pu_rhs(ji,jj,jk) = pu_rhs(ji,jj,jk) + zua
pv_rhs(ji,jj,jk) = pv_rhs(ji,jj,jk) + zva
END_2D
+#endif
END DO
! ! ===============
! ! End of slab
@@ -1000,14 +1029,8 @@ CONTAINS
REAL(wp) :: zua, zva ! local scalars
REAL(wp) :: zmsk, ze3f ! local scalars
REAL(wp), DIMENSION(A2D(1)) :: z1_e3f
-#if defined key_loop_fusion
- REAL(wp) :: ztne, ztnw, ztnw_ip1, ztse, ztse_jp1, ztsw_jp1, ztsw_ip1
- REAL(wp) :: zwx, zwx_im1, zwx_jp1, zwx_im1_jp1
- REAL(wp) :: zwy, zwy_ip1, zwy_jm1, zwy_ip1_jm1
-#else
REAL(wp), DIMENSION(A2D(1)) :: zwx , zwy
REAL(wp), DIMENSION(A2D(1)) :: ztnw, ztne, ztsw, ztse
-#endif
REAL(wp), DIMENSION(A2D(1),jpkm1) :: zwz ! 3D workspace, jpkm1 -> jpkm1 -> avoid lbc_lnk on jpk that is not defined
!!----------------------------------------------------------------------
!
@@ -1106,39 +1129,11 @@ CONTAINS
END DO ! End of slab
! ! ===============
!
- IF (nn_hls==1) CALL lbc_lnk( 'dynvor', zwz, 'F', 1.0_wp )
+ CALL lbc_lnk( 'dynvor', zwz, 'F', 1.0_wp )
!
! ! ===============
! ! Horizontal slab
! ! ===============
-#if defined key_loop_fusion
- DO_3D( 0, 0, 0, 0, 1, jpkm1 )
- ! !== horizontal fluxes ==!
- zwx = e2u(ji ,jj ) * e3u(ji ,jj ,jk,Kmm) * pu(ji ,jj ,jk)
- zwx_im1 = e2u(ji-1,jj ) * e3u(ji-1,jj ,jk,Kmm) * pu(ji-1,jj ,jk)
- zwx_jp1 = e2u(ji ,jj+1) * e3u(ji ,jj+1,jk,Kmm) * pu(ji ,jj+1,jk)
- zwx_im1_jp1 = e2u(ji-1,jj+1) * e3u(ji-1,jj+1,jk,Kmm) * pu(ji-1,jj+1,jk)
- zwy = e1v(ji ,jj ) * e3v(ji ,jj ,jk,Kmm) * pv(ji ,jj ,jk)
- zwy_ip1 = e1v(ji+1,jj ) * e3v(ji+1,jj ,jk,Kmm) * pv(ji+1,jj ,jk)
- zwy_jm1 = e1v(ji ,jj-1) * e3v(ji ,jj-1,jk,Kmm) * pv(ji ,jj-1,jk)
- zwy_ip1_jm1 = e1v(ji+1,jj-1) * e3v(ji+1,jj-1,jk,Kmm) * pv(ji+1,jj-1,jk)
- ! !== compute and add the vorticity term trend =!
- ztne = zwz(ji-1,jj ,jk) + zwz(ji ,jj ,jk) + zwz(ji ,jj-1,jk)
- ztnw = zwz(ji-1,jj-1,jk) + zwz(ji-1,jj ,jk) + zwz(ji ,jj ,jk)
- ztnw_ip1 = zwz(ji ,jj-1,jk) + zwz(ji ,jj ,jk) + zwz(ji+1,jj ,jk)
- ztse = zwz(ji ,jj ,jk) + zwz(ji ,jj-1,jk) + zwz(ji-1,jj-1,jk)
- ztse_jp1 = zwz(ji ,jj+1,jk) + zwz(ji ,jj ,jk) + zwz(ji-1,jj ,jk)
- ztsw_jp1 = zwz(ji ,jj ,jk) + zwz(ji-1,jj ,jk) + zwz(ji-1,jj+1,jk)
- ztsw_ip1 = zwz(ji+1,jj-1,jk) + zwz(ji ,jj-1,jk) + zwz(ji ,jj ,jk)
- !
- zua = + r1_12 * r1_e1u(ji,jj) * ( ztne * zwy + ztnw_ip1 * zwy_ip1 &
- & + ztse * zwy_jm1 + ztsw_ip1 * zwy_ip1_jm1 )
- zva = - r1_12 * r1_e2v(ji,jj) * ( ztsw_jp1 * zwx_im1_jp1 + ztse_jp1 * zwx_jp1 &
- & + ztnw * zwx_im1 + ztne * zwx )
- pu_rhs(ji,jj,jk) = pu_rhs(ji,jj,jk) + zua
- pv_rhs(ji,jj,jk) = pv_rhs(ji,jj,jk) + zva
- END_3D
-#else
DO jk = 1, jpkm1
!
! !== horizontal fluxes ==!
@@ -1164,7 +1159,6 @@ CONTAINS
pv_rhs(ji,jj,jk) = pv_rhs(ji,jj,jk) + zva
END_2D
END DO
-#endif
! ! ===============
! ! End of slab
! ! ===============