text: /**********************************************************************
   * Copyright (c) 2013, 2014 Pieter Wuille                             *
   * Distributed under the MIT software license, see the accompanying   *
   * file COPYING or http://www.opensource.org/licenses/mit-license.php.*
   **********************************************************************/
  
  #ifndef _SECP256K1_FIELD_REPR_
  #define _SECP256K1_FIELD_REPR_
  
  #include <stdint.h>
  
  typedef struct {
      /* X = sum(i=0..9, elem[i]*2^26) mod n */
      uint32_t n[10];
  #ifdef VERIFY
      int magnitude;
      int normalized;
  #endif
  } secp256k1_fe_t;
  
  /* Unpacks a constant into a overlapping multi-limbed FE element. */
  #define SECP256K1_FE_CONST_INNER(d7, d6, d5, d4, d3, d2, d1, d0) { \
      (d0) & 0x3FFFFFFUL, \
      ((d0) >> 26) | ((d1) & 0xFFFFFUL) << 6, \
      ((d1) >> 20) | ((d2) & 0x3FFFUL) << 12, \
      ((d2) >> 14) | ((d3) & 0xFFUL) << 18, \
      ((d3) >> 8) | ((d4) & 0x3) << 24, \
      ((d4) >> 2) & 0x3FFFFFFUL, \
      ((d4) >> 28) | ((d5) & 0x3FFFFFUL) << 4, \
      ((d5) >> 22) | ((d6) & 0xFFFF) << 10, \
      ((d6) >> 16) | ((d7) & 0x3FF) << 16, \
      ((d7) >> 10) \
  }
  
  #ifdef VERIFY
  #define SECP256K1_FE_CONST(d7, d6, d5, d4, d3, d2, d1, d0) {SECP256K1_FE_CONST_INNER((d7), (d6), (d5), (d4), (d3), (d2), (d1), (d0)), 1, 1}
  #else
  #define SECP256K1_FE_CONST(d7, d6, d5, d4, d3, d2, d1, d0) {SECP256K1_FE_CONST_INNER((d7), (d6), (d5), (d4), (d3), (d2), (d1), (d0))}
  #endif
  
  typedef struct {
      uint32_t n[8];
  } secp256k1_fe_storage_t;
  
  #define SECP256K1_FE_STORAGE_CONST(d7, d6, d5, d4, d3, d2, d1, d0) {{ (d0), (d1), (d2), (d3), (d4), (d5), (d6), (d7) }}
  
  #endif
  