release/src/router/libsodium/src/libsodium/crypto_sign/ed25519/ref10/fe_add.c

   1 #include "fe.h"
   2
   3 /*
   4 h = f + g
   5 Can overlap h with f or g.
   6
   7 Preconditions:
   8    |f| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
   9    |g| bounded by 1.1*2^25,1.1*2^24,1.1*2^25,1.1*2^24,etc.
  10
  11 Postconditions:
  12    |h| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc.
  13 */
  14
  15 void fe_add(fe h,const fe f,const fe g)
  16 {
  17   crypto_int32 f0 = f[0];
  18   crypto_int32 f1 = f[1];
  19   crypto_int32 f2 = f[2];
  20   crypto_int32 f3 = f[3];
  21   crypto_int32 f4 = f[4];
  22   crypto_int32 f5 = f[5];
  23   crypto_int32 f6 = f[6];
  24   crypto_int32 f7 = f[7];
  25   crypto_int32 f8 = f[8];
  26   crypto_int32 f9 = f[9];
  27   crypto_int32 g0 = g[0];
  28   crypto_int32 g1 = g[1];
  29   crypto_int32 g2 = g[2];
  30   crypto_int32 g3 = g[3];
  31   crypto_int32 g4 = g[4];
  32   crypto_int32 g5 = g[5];
  33   crypto_int32 g6 = g[6];
  34   crypto_int32 g7 = g[7];
  35   crypto_int32 g8 = g[8];
  36   crypto_int32 g9 = g[9];
  37   crypto_int32 h0 = f0 + g0;
  38   crypto_int32 h1 = f1 + g1;
  39   crypto_int32 h2 = f2 + g2;
  40   crypto_int32 h3 = f3 + g3;
  41   crypto_int32 h4 = f4 + g4;
  42   crypto_int32 h5 = f5 + g5;
  43   crypto_int32 h6 = f6 + g6;
  44   crypto_int32 h7 = f7 + g7;
  45   crypto_int32 h8 = f8 + g8;
  46   crypto_int32 h9 = f9 + g9;
  47   h[0] = h0;
  48   h[1] = h1;
  49   h[2] = h2;
  50   h[3] = h3;
  51   h[4] = h4;
  52   h[5] = h5;
  53   h[6] = h6;
  54   h[7] = h7;
  55   h[8] = h8;
  56   h[9] = h9;
  57 }