Added #ifdefs and CMake logic for deciding when to use JIT

CMakeLists.txt

@@ -269,6 +269,14 @@ IF (ANDROID OR PNACL)
 ELSE (ANDROID OR PNACL)
     SET_SOURCE_FILES_PROPERTIES(${CMAKE_SOURCE_DIR}/libraries/sfmt/src/SFMT.cpp PROPERTIES COMPILE_FLAGS "-DHAVE_SSE2=1")
 ENDIF(ANDROID OR PNACL)
+IF (NOT (ANDROID OR PNACL))
+    FILE(GLOB src_files ${CMAKE_CURRENT_SOURCE_DIR}/libraries/asmjit/*/*.cpp)
+    FILE(GLOB incl_files ${CMAKE_CURRENT_SOURCE_DIR}/libraries/asmjit/*.h)
+    SET(SOURCE_FILES ${SOURCE_FILES} ${src_files})
+    SET(SOURCE_INCLUDE_FILES ${SOURCE_INCLUDE_FILES} ${incl_files})
+    INCLUDE_DIRECTORIES(BEFORE "${CMAKE_CURRENT_SOURCE_DIR}/libraries/asmjit")
+    SET(EXTRA_COMPILE_FLAGS "${EXTRA_COMPILE_FLAGS} -DLEPTON_USE_JIT")
+ENDIF (NOT (ANDROID OR PNACL))
 
 # If API wrappers are being generated, and add them to the build.
 SET(OPENMM_BUILD_C_AND_FORTRAN_WRAPPERS ON CACHE BOOL "Build wrappers for C and Fortran")

libraries/lepton/include/lepton/CompiledExpression.h

@@ -34,11 +34,13 @@
 
 #include "ExpressionTreeNode.h"
 #include "windowsIncludes.h"
-#include "asmjit.h"
 #include <map>
 #include <set>
 #include <string>
 #include <vector>
+#ifdef LEPTON_USE_JIT
+    #include "asmjit.h"
+#endif
 
 namespace Lepton {
 
@@ -79,8 +81,6 @@ private:
     friend class ParsedExpression;
     CompiledExpression(const ParsedExpression& expression);
     void compileExpression(const ExpressionTreeNode& node, std::vector<std::pair<ExpressionTreeNode, int> >& temps);
-    void generateJitCode();
-    void generateSingleArgCall(asmjit::X86Compiler& c, asmjit::X86XmmVar& dest, asmjit::X86XmmVar& arg, double (*function)(double));
     int findTempIndex(const ExpressionTreeNode& node, std::vector<std::pair<ExpressionTreeNode, int> >& temps);
     std::vector<std::vector<int> > arguments;
     std::vector<int> target;
@@ -90,9 +90,13 @@ private:
     mutable std::vector<double> workspace;
     mutable std::vector<double> argValues;
     std::map<std::string, double> dummyVariables;
+    void* jitCode;
+#ifdef LEPTON_USE_JIT
+    void generateJitCode();
+    void generateSingleArgCall(asmjit::X86Compiler& c, asmjit::X86XmmVar& dest, asmjit::X86XmmVar& arg, double (*function)(double));
     std::vector<double> constants;
     asmjit::JitRuntime runtime;
-    void* jitCode;
+#endif
 };
 
 } // namespace Lepton

libraries/lepton/src/CompiledExpression.cpp

@@ -36,7 +36,9 @@
 
 using namespace Lepton;
 using namespace std;
-using namespace asmjit;
+#ifdef LEPTON_USE_JIT
+    using namespace asmjit;
+#endif
 
 CompiledExpression::CompiledExpression() : jitCode(NULL) {
 }
@@ -50,7 +52,9 @@ CompiledExpression::CompiledExpression(const ParsedExpression& expression) : jit
         if (operation[i]->getNumArguments() > maxArguments)
             maxArguments = operation[i]->getNumArguments();
     argValues.resize(maxArguments);
+#ifdef LEPTON_USE_JIT
     generateJitCode();
+#endif
 }
 
 CompiledExpression::~CompiledExpression() {
@@ -73,7 +77,9 @@ CompiledExpression& CompiledExpression::operator=(const CompiledExpression& expr
     operation.resize(expression.operation.size());
     for (int i = 0; i < (int) operation.size(); i++)
         operation[i] = expression.operation[i]->clone();
+#ifdef LEPTON_USE_JIT
     generateJitCode();
+#endif
     return *this;
 }
 
@@ -138,9 +144,9 @@ double& CompiledExpression::getVariableReference(const string& name) {
 }
 
 double CompiledExpression::evaluate() const {
-    if (jitCode != NULL)
+#ifdef LEPTON_USE_JIT
     return ((double (*)()) jitCode)();
-
+#else
     // Loop over the operations and evaluate each one.
     
     for (int step = 0; step < operation.size(); step++) {
@@ -154,8 +160,10 @@ double CompiledExpression::evaluate() const {
         }
     }
     return workspace[workspace.size()-1];
+#endif
 }
 
+#ifdef LEPTON_USE_JIT
 static double evaluateOperation(Operation* op, double* args) {
     map<string, double>* dummyVariables = NULL;
     return op->evaluate(args, *dummyVariables);
@@ -358,3 +366,4 @@ void CompiledExpression::generateSingleArgCall(X86Compiler& c, X86XmmVar& dest,
     call->setArg(0, arg);
     call->setRet(0, dest);
 }
+#endif
\ No newline at end of file