Support OpenCL source code (.cl files)

OpenCL source code needs to be compiled at run time, and thus needs to
be passed as string to the OpenCL run-time library. This makes writing
OpenCL source code inconvenient.

This patch adds *.cl as supported file type to Cactus. *.cl files are
transformed into globally visible strings, with a name consisting of
the thorn name and file name. These strings can then be easily used at
run time to build and run OpenCL code.

Since *.cl files are converted to strings (and are not OpenCL-compiled
at build time), there are no CL* options specifying compiler type,
compiler flags etc.


git-svn-id: http://svn.cactuscode.org/flesh/trunk@4808 17b73243-c579-4c4c-a9d2-2d5706c11dac

1 files changed, 40 insertions, 0 deletions

diff --git a/lib/make/make.config.rules.in b/lib/make/make.config.rules.in
index cec72a91..caef245d 100644
--- a/lib/make/make.config.rules.in
+++ b/lib/make/make.config.rules.in
@@ -83,6 +83,12 @@ define CXX_DEPENDENCIES
 	$(DEPENDENCY_FIXER)
 endef
 
+define CL_DEPENDENCIES
+# An OpenCL source file has no external dependencies
+	$(CL_DEPEND) $< $(CL_DEPEND_OUT)
+	$(DEPENDENCY_FIXER)
+endef
+
 define CU_DEPENDENCIES
         $(CU_DEPEND) $< $(INCLUDE_LINE) $(EXTRA_DEFINES:%=-D%) -DCCODE $(CU_DEPEND_OUT)
         $(DEPENDENCY_FIXER)
@@ -149,6 +155,26 @@ define POSTPROCESS_CXX
 $(CXX_POSTPROCESSING)
 endef
 
+# Define how to do an OpenCL compilation
+define PREPROCESS_CL
+# Wrap the OpenCL source code into a string, using the thorn name and
+# file name to create a variable name, and create a C file
+{								\
+    echo 'char const *const OpenCL_source_$(THORN)_$* =';	\
+    sed -e 's/\\/\\\\/g;s/"/\\"/g;s/\(.*\)/"\1\\n"/g';		\
+    echo ';';							\
+} < $^ > $(notdir $<).c
+endef
+
+define COMPILE_CL
+# Basically a C compile, but with a different source file name
+current_wd=`$(GET_WD)` ; cd $(SCRATCH_BUILD) ; $(CC) $(CPPFLAGS) $(CFLAGS) $(CCOMPILEONLY)$(OPTIONSEP)$$current_wd$(DIRSEP)$@ $$current_wd$(DIRSEP)$(notdir $<).c $(INCLUDE_LINE) $(EXTRA_DEFINES:%=-D%) -DCCODE
+endef
+
+define POSTPROCESS_CL
+$(CL_POSTPROCESSING)
+endef
+
 # Define how to do a CUDA compilation
 define PREPROCESS_CU
 { if test $(C_LINE_DIRECTIVES) = 'yes'; then echo '#line 1 "'$<'"'; fi; cat $<; } | $(PERL) -s $(C_FILE_PROCESSOR) -line_directives=$(C_LINE_DIRECTIVES) -source_file_name=$< $(CONFIG) > $(notdir $<)
@@ -283,6 +309,20 @@ endef
 %.cxx.d: $(SRCDIR)/%.cxx
 	$(CXX_DEPENDENCIES)
 
+# Build rules for OpenCL
+
+%.cl.o: $(SRCDIR)/%.cl
+	$(NOTIFY_PREPROCESSING)
+	$(PREPROCESS_CL)
+	$(NOTIFY_COMPILING)
+	$(COMPILE_CL)
+	$(NOTIFY_POSTPROCESSING)
+	$(POSTPROCESS_CL)
+	$(NOTIFY_DIVIDER)
+
+%.cl.d: $(SRCDIR)/%.cl
+	$(CL_DEPENDENCIES)
+
 # Build rules for CUDA
 
 %.cu.o: $(SRCDIR)/%.cu