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	# if defined(__GNUC__)			# if defined(__GNUC__)
	# define SECP256K1_GNUC_EXT __extension__			# define SECP256K1_GNUC_EXT __extension__
	# else			# else
	# define SECP256K1_GNUC_EXT			# define SECP256K1_GNUC_EXT
	# endif			# endif
	SECP256K1_GNUC_EXT typedef unsigned __int128 uint128_t;			SECP256K1_GNUC_EXT typedef unsigned __int128 uint128_t;
	#endif			#endif

				/* Zero memory if flag == 1. Constant time. */
				static SECP256K1_INLINE void memczero(void *s, size_t len, int flag) {
				unsigned char *p;
				unsigned char mask = -(unsigned char)flag;
				p = (unsigned char *)s;
				while (len) {
				p ^= p & mask;
				p++;
				len--;
				}
				}

	#endif /* SECP256K1_UTIL_H */			#endif /* SECP256K1_UTIL_H */