+#if CPUFAM_X86 || CPUFAM_AMD64
+extern core__functype chacha_core_x86ish_sse2;
+#endif
+
+static core__functype *pick_core(void)
+{
+#if CPUFAM_X86 || CPUFAM_AMD64
+ DISPATCH_PICK_COND(chacha_core, chacha_core_x86ish_sse2,
+ cpu_feature_p(CPUFEAT_X86_SSE2));
+#endif
+ DISPATCH_PICK_FALLBACK(chacha_core, simple_core);
+}
+