+#ifndef _OPENMP
+ /* Don't adjust FPU precision mode in case multiple threads are to be used.
+ * This would require that the additional threads also changed the FPU mode
+ * which is quite a mess as this had to be done in all parallelized sections;
+ * otherwise the master thread and all other threads are running in different
+ * modes, producing inconsistent results.
+ * Note that all x64 implementations don't define/use START_FAST_MATH, so
+ * this is "hack" is only used in i386 mode
+ */