void *key;
};
-#if (defined(_WIN32) || defined(_WIN64)) && !defined(__MINGW32__)
-#define U64(C) C##UI64
-#elif defined(__arch64__)
-#define U64(C) C##UL
-#else
-#define U64(C) C##ULL
+#if defined(OPENSSL_X86) || defined(OPENSSL_X86_64)
+/* crypto_gcm_clmul_enabled returns one if the CLMUL implementation of GCM is
+ * used. */
+int crypto_gcm_clmul_enabled(void);
#endif