+#else /* fallback */
+__attribute__((const)) static uint16_t be16toh(uint16_t n) {
+ uint8_t tmp[2];
+ memmove(tmp, &n, sizeof(tmp));
+
+ return ((uint16_t)tmp[0] << 8) | ((uint16_t)tmp[1] << 0);
+}
+
+__attribute__((const)) static uint64_t be64toh(uint64_t n) {
+ uint8_t tmp[8];
+ memmove(tmp, &n, sizeof(tmp));
+
+ return ((uint64_t)tmp[0] << 56) | ((uint64_t)tmp[1] << 48) |
+ ((uint64_t)tmp[2] << 40) | ((uint64_t)tmp[3] << 32) |
+ ((uint64_t)tmp[4] << 24) | ((uint64_t)tmp[5] << 16) |
+ ((uint64_t)tmp[6] << 8) | ((uint64_t)tmp[7] << 0);
+}