Two FFT Tutorials (#99)

Co-authored-by: jclepelch <60457193+jclepelch@users.noreply.github.com>
AMReX-Codes · Aug 3, 2023 · 7fa647d · 7fa647d
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diff --git a/ExampleCodes/FFTW/Basic/GNUmakefile b/ExampleCodes/FFTW/Basic/GNUmakefile
@@ -0,0 +1,22 @@
+# AMREX_HOME defines the directory in which we will find all the AMReX code.
+AMREX_HOME ?= ../../../../amrex
+
+USE_MPI      = TRUE
+DEBUG        = FALSE
+USE_OMP      = FALSE
+COMP         = gnu
+DIM          = 2
+
+include $(AMREX_HOME)/Tools/GNUMake/Make.defs
+
+include ./Make.package
+
+include $(AMREX_HOME)/Src/Base/Make.package
+
+include $(AMREX_HOME)/Tools/GNUMake/Make.rules
+
+ifeq ($(USE_CUDA),TRUE)
+  LIBRARIES += -lcufft
+else
+  LIBRARIES += -L$(FFTW_DIR) -lfftw3_mpi -lfftw3
+endif
diff --git a/ExampleCodes/FFTW/Basic/Make.package b/ExampleCodes/FFTW/Basic/Make.package
@@ -0,0 +1,3 @@
+CEXE_sources += main.cpp myfunc.cpp
+CEXE_headers = myfunc.H
+
diff --git a/ExampleCodes/FFTW/Basic/inputs b/ExampleCodes/FFTW/Basic/inputs
@@ -0,0 +1,8 @@
+max_grid_size = 32
+n_cell_x = 64
+n_cell_y = 64
+n_cell_z = 64
+
+prob_hi_x = 1.
+prob_hi_y = 1.
+prob_hi_z = 1.