1  #ifndef SECP256K1_INT128_NATIVE_H
 2  #define SECP256K1_INT128_NATIVE_H
 3  
 4  #include <stdint.h>
 5  #include "util.h"
 6  
 7  #if !defined(UINT128_MAX) && defined(__SIZEOF_INT128__)
 8  SECP256K1_GNUC_EXT typedef unsigned __int128 uint128_t;
 9  SECP256K1_GNUC_EXT typedef __int128 int128_t;
10  # define UINT128_MAX ((uint128_t)(-1))
11  # define INT128_MAX ((int128_t)(UINT128_MAX >> 1))
12  # define INT128_MIN (-INT128_MAX - 1)
13  /* No (U)INT128_C macros because compilers providing __int128 do not support 128-bit literals.  */
14  #endif
15  
16  typedef uint128_t secp256k1_uint128;
17  typedef int128_t secp256k1_int128;
18  
19  #endif