Interpolate_cubic2DmonoDerv.F90

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!!  Copyright 2022 UChicago Argonne, LLC and contributors
!!
!!  Licensed under the Apache License, Version 2.0 (the "License");
!!  you may not use this file except in compliance with the License.
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!!  Unless required by applicable law or agreed to in writing, software
!!  distributed under the License is distributed on an "AS IS" BASIS,
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!!  See the License for the specific language governing permissions and
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subroutine Interpolate_cubic2DmonoDerv (nx, ny,        &
                                        f,             &
                                                   fx, &
                                                   fy, &
                                                   fxy )
 
  implicit none
 
  integer, intent (in)  :: nx, ny
  real,    intent (in)  :: f   (-1:nx+2 , -1:ny+2)
  real,    intent (out) :: fx  ( 0:nx+1 ,  0:ny+1)
  real,    intent (out) :: fy  ( 0:nx+1 ,  0:ny+1)
  real,    intent (out) :: fxy ( 1:nx   ,  1:ny  )
 
  fx(0:nx+1 , 0:ny+1) = 0.0
  fy(0:nx+1 , 0:ny+1) = 0.0
  fxy(1:nx   , 1:ny  ) = 0.0
 
  return
end subroutine Interpolate_cubic2DmonoDerv