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Typedef (u)int128_t only when they're not provided by the compiler

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This commit is contained in:
Tim Ruffing 2020-10-27 15:58:04 +01:00
parent e89278f211
commit 1f4dd03838
1 changed files with 7 additions and 1 deletions
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8
src/util.h
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@ -260,14 +260,20 @@ static SECP256K1_INLINE void secp256k1_int_cmov(int *r, const int *a, int flag)
# define SECP256K1_WIDEMUL_INT128 1
#elif defined(USE_FORCE_WIDEMUL_INT64)
# define SECP256K1_WIDEMUL_INT64 1
#elif defined(__SIZEOF_INT128__)
#elif defined(UINT128_MAX) || defined(__SIZEOF_INT128__)
# define SECP256K1_WIDEMUL_INT128 1
#else
# define SECP256K1_WIDEMUL_INT64 1
#endif
#if defined(SECP256K1_WIDEMUL_INT128)
# if !defined(UINT128_MAX) && defined(__SIZEOF_INT128__)
SECP256K1_GNUC_EXT typedef unsigned __int128 uint128_t;
SECP256K1_GNUC_EXT typedef __int128 int128_t;
#define UINT128_MAX ((uint128_t)(-1))
#define INT128_MAX ((int128_t)(UINT128_MAX >> 1))
#define INT128_MIN (-INT128_MAX - 1)
/* No (U)INT128_C macros because compilers providing __int128 do not support 128-bit literals. */
# endif
#endif
#endif /* SECP256K1_UTIL_H */