adding openacc to fortran

Author: pletzer

CMakeLists.txt

@@ -99,6 +99,11 @@ else ()
 	  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fopenacc -fopt-info-optimized-omp")
 	  message(STATUS "Using GNU C++ compiler, added OpenACC compiler switches")
       endif ()
+      if ("${CMAKE_Fortran_COMPILER_ID}" MATCHES "^NVHPC|PGI")
+          set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -acc -Minfo=acc")
+      elseif ("${CMAKE_Fortran_COMPILER_ID}" MATCHES "^GNU")
+          set(CMAKE_Fortran_FLAGS "${CMAKE_Fortran_FLAGS} -fopenacc -fopt-info-optimized-omp")
+      endif ()
     message(STATUS "OpenACC enabled")
   endif () 
 endif ()

upwind/fortran/upwind.F90

@@ -120,6 +120,7 @@ subroutine upwind_advect(obj, deltaTime)
 
         ! iterate over the cells
         !$OMP PARALLEL DO PRIVATE(i, j, inds, oldIndex, upI)
+        !$acc parallel loop
         do i = 1, obj % ntot
 
             ! compute the index set of this cell