Add floating point arithmetic options

CMakeLists.txt

@@ -88,7 +88,7 @@ if( ScalFMM_BUILD_DEBUG )
   IF( APPLE ) 
     SET(SCALFMM_FLAGS_OPTI_DEBUG "-m64  -funroll-loops" CACHE STRING "Set your optimization flags for debug mode.")
   ELSE(APPLE)
-    SET(SCALFMM_FLAGS_OPTI_DEBUG "${FLAGS_64bits} -march=native -funroll-loops" CACHE STRING "Set your optimization flags for debug mode.")
+    SET(SCALFMM_FLAGS_OPTI_DEBUG "${FLAGS_64bits} -fp-model strict -march=native -funroll-loops" CACHE STRING "Set your optimization flags for debug mode.")
   ENDIF(APPLE)
 #  ADD_DEFINITIONS(${SCALFMM_FLAGS_OPTI_DEBUG})
   SET(ScaLFMM_CXX_FLAGS  "${ScaLFMM_CXX_FLAGS} ${SCALFMM_FLAGS_OPTI_DEBUG}")
@@ -111,7 +111,7 @@ else()
   ELSE(APPLE)
     # Not apple system - Check the compilater flags 
     if(CMAKE_CXX_COMPILER_ID STREQUAL "Intel")
-      SET(SCALFMM_FLAGS_OPTI_RELEASE "${FLAGS_64bits} -march=native -funroll-loops -ftree-vectorize" CACHE STRING "Set your optimization flags for release mode.")
+      SET(SCALFMM_FLAGS_OPTI_RELEASE "${FLAGS_64bits} -fp-model precise -fp-model source -fimf-precision=low  -march=native -funroll-loops -ftree-vectorize" CACHE STRING "Set your optimization flags for release mode.")
     else()
       SET(SCALFMM_FLAGS_OPTI_RELEASE "${FLAGS_64bits} -ffast-math -flto -march=native -funroll-loops -ftree-vectorize" CACHE STRING "Set your optimization flags for release mode.")
     endif()

Tests/Kernels/testNewCompareKernels.cpp

@@ -372,7 +372,7 @@ int main(int argc, char* argv[])
 #endif
 
 {
-  const static int P = 7;
+  const static int P = 8;
   typedef FRotationCell<P>               CellClass;
   typedef FP2PParticleContainerIndexed<>          ContainerClass;
   typedef FSimpleLeaf< ContainerClass >                     LeafClass;