+ Tail calling on x86_64
+ -------------------------------------------------------------------------- */
+
+#if x86_64_TARGET_ARCH
+
+#define JMP_(cont) \
+ { \
+ void *__target; \
+ __target = (void *)(cont); \
+ goto *__target; \
+ }
+
+#endif /* x86_64_TARGET_ARCH */
+
+/* -----------------------------------------------------------------------------