Differential D7600 Diff 23870 src/secp256k1/src/util.h

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src/secp256k1/src/util.h

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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

				#if defined(__BYTE_ORDER__)
				# if defined(__ORDER_LITTLE_ENDIAN__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ && !defined(SECP256K1_LITTLE_ENDIAN)
				# define SECP256K1_LITTLE_ENDIAN
				# elif defined(__ORDER_BIG_ENDIAN__) && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ && !defined(SECP256K1_BIG_ENDIAN)
				# define SECP256K1_BIG_ENDIAN
				# endif
				#endif
				#if defined(_MSC_VER) && defined(_WIN32) && !defined(SECP256K1_LITTLE_ENDIAN)
				# define SECP256K1_LITTLE_ENDIAN
				#endif
				#if defined(SECP256K1_LITTLE_ENDIAN) == defined(SECP256K1_BIG_ENDIAN)
				# error Please make sure that either SECP256K1_LITTLE_ENDIAN or SECP256K1_BIG_ENDIAN is set, see src/util.h.
				#endif

	/* Zero memory if flag == 1. Flag must be 0 or 1. Constant time. */			/* Zero memory if flag == 1. Flag must be 0 or 1. Constant time. */
	static SECP256K1_INLINE void memczero(void *s, size_t len, int flag) {			static SECP256K1_INLINE void memczero(void *s, size_t len, int flag) {
	unsigned char p = (unsigned char )s;			unsigned char p = (unsigned char )s;
	/* Access flag with a volatile-qualified lvalue.			/* Access flag with a volatile-qualified lvalue.
	This prevents clang from figuring out (after inlining) that flag can			This prevents clang from figuring out (after inlining) that flag can
	take only be 0 or 1, which leads to variable time code. */			take only be 0 or 1, which leads to variable time code. */
	volatile int vflag = flag;			volatile int vflag = flag;
	unsigned char mask = -(unsigned char) vflag;			unsigned char mask = -(unsigned char) vflag;
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