content: package im.actor.runtime.crypto.primitives.curve25519;
  
  // Disabling Bounds checks for speeding up calculations
  
  /*-[
  #define J2OBJC_DISABLE_ARRAY_BOUND_CHECKS 1
  ]-*/
  
  public class fe_sq2 {
  
  //CONVERT #include "fe.h"
  //CONVERT #include "long.h"
  
  /*
  h = 2 * f * f
  Can overlap h with f.
  
  Preconditions:
     |f| bounded by 1.65*2^26,1.65*2^25,1.65*2^26,1.65*2^25,etc.
  
  Postconditions:
     |h| bounded by 1.01*2^25,1.01*2^24,1.01*2^25,1.01*2^24,etc.
  */
  
  /*
  See fe_mul.c for discussion of implementation strategy.
  */
  
      public static void fe_sq2(int[] h, int[] f) {
          int f0 = f[0];
          int f1 = f[1];
          int f2 = f[2];
          int f3 = f[3];
          int f4 = f[4];
          int f5 = f[5];
          int f6 = f[6];
          int f7 = f[7];
          int f8 = f[8];
          int f9 = f[9];
          int f0_2 = 2 * f0;
          int f1_2 = 2 * f1;
          int f2_2 = 2 * f2;
          int f3_2 = 2 * f3;
          int f4_2 = 2 * f4;
          int f5_2 = 2 * f5;
          int f6_2 = 2 * f6;
          int f7_2 = 2 * f7;
          int f5_38 = 38 * f5; /* 1.959375*2^30 */
          int f6_19 = 19 * f6; /* 1.959375*2^30 */
          int f7_38 = 38 * f7; /* 1.959375*2^30 */
          int f8_19 = 19 * f8; /* 1.959375*2^30 */
          int f9_38 = 38 * f9; /* 1.959375*2^30 */
          long f0f0 = f0 * (long) f0;
          long f0f1_2 = f0_2 * (long) f1;
          long f0f2_2 = f0_2 * (long) f2;
          long f0f3_2 = f0_2 * (long) f3;
          long f0f4_2 = f0_2 * (long) f4;
          long f0f5_2 = f0_2 * (long) f5;
          long f0f6_2 = f0_2 * (long) f6;
          long f0f7_2 = f0_2 * (long) f7;
          long f0f8_2 = f0_2 * (long) f8;
          long f0f9_2 = f0_2 * (long) f9;
          long f1f1_2 = f1_2 * (long) f1;
          long f1f2_2 = f1_2 * (long) f2;
          long f1f3_4 = f1_2 * (long) f3_2;
          long f1f4_2 = f1_2 * (long) f4;
          long f1f5_4 = f1_2 * (long) f5_2;
          long f1f6_2 = f1_2 * (long) f6;
          long f1f7_4 = f1_2 * (long) f7_2;
          long f1f8_2 = f1_2 * (long) f8;
          long f1f9_76 = f1_2 * (long) f9_38;
          long f2f2 = f2 * (long) f2;
          long f2f3_2 = f2_2 * (long) f3;
          long f2f4_2 = f2_2 * (long) f4;
          long f2f5_2 = f2_2 * (long) f5;
          long f2f6_2 = f2_2 * (long) f6;
          long f2f7_2 = f2_2 * (long) f7;
          long f2f8_38 = f2_2 * (long) f8_19;
          long f2f9_38 = f2 * (long) f9_38;
          long f3f3_2 = f3_2 * (long) f3;
          long f3f4_2 = f3_2 * (long) f4;
          long f3f5_4 = f3_2 * (long) f5_2;
          long f3f6_2 = f3_2 * (long) f6;
          long f3f7_76 = f3_2 * (long) f7_38;
          long f3f8_38 = f3_2 * (long) f8_19;
          long f3f9_76 = f3_2 * (long) f9_38;
          long f4f4 = f4 * (long) f4;
          long f4f5_2 = f4_2 * (long) f5;
          long f4f6_38 = f4_2 * (long) f6_19;
          long f4f7_38 = f4 * (long) f7_38;
          long f4f8_38 = f4_2 * (long) f8_19;
          long f4f9_38 = f4 * (long) f9_38;
          long f5f5_38 = f5 * (long) f5_38;
          long f5f6_38 = f5_2 * (long) f6_19;
          long f5f7_76 = f5_2 * (long) f7_38;
          long f5f8_38 = f5_2 * (long) f8_19;
          long f5f9_76 = f5_2 * (long) f9_38;
          long f6f6_19 = f6 * (long) f6_19;
          long f6f7_38 = f6 * (long) f7_38;
          long f6f8_38 = f6_2 * (long) f8_19;
          long f6f9_38 = f6 * (long) f9_38;
          long f7f7_38 = f7 * (long) f7_38;
          long f7f8_38 = f7_2 * (long) f8_19;
          long f7f9_76 = f7_2 * (long) f9_38;
          long f8f8_19 = f8 * (long) f8_19;
          long f8f9_38 = f8 * (long) f9_38;
          long f9f9_38 = f9 * (long) f9_38;
          long h0 = f0f0 + f1f9_76 + f2f8_38 + f3f7_76 + f4f6_38 + f5f5_38;
          long h1 = f0f1_2 + f2f9_38 + f3f8_38 + f4f7_38 + f5f6_38;
          long h2 = f0f2_2 + f1f1_2 + f3f9_76 + f4f8_38 + f5f7_76 + f6f6_19;
          long h3 = f0f3_2 + f1f2_2 + f4f9_38 + f5f8_38 + f6f7_38;
          long h4 = f0f4_2 + f1f3_4 + f2f2 + f5f9_76 + f6f8_38 + f7f7_38;
          long h5 = f0f5_2 + f1f4_2 + f2f3_2 + f6f9_38 + f7f8_38;
          long h6 = f0f6_2 + f1f5_4 + f2f4_2 + f3f3_2 + f7f9_76 + f8f8_19;
          long h7 = f0f7_2 + f1f6_2 + f2f5_2 + f3f4_2 + f8f9_38;
          long h8 = f0f8_2 + f1f7_4 + f2f6_2 + f3f5_4 + f4f4 + f9f9_38;
          long h9 = f0f9_2 + f1f8_2 + f2f7_2 + f3f6_2 + f4f5_2;
          long carry0;
          long carry1;
          long carry2;
          long carry3;
          long carry4;
          long carry5;
          long carry6;
          long carry7;
          long carry8;
          long carry9;
  
          h0 += h0;
          h1 += h1;
          h2 += h2;
          h3 += h3;
          h4 += h4;
          h5 += h5;
          h6 += h6;
          h7 += h7;
          h8 += h8;
          h9 += h9;
  
          carry0 = (h0 + (long) (1 << 25)) >> 26;
          h1 += carry0;
          h0 -= carry0 << 26;
          carry4 = (h4 + (long) (1 << 25)) >> 26;
          h5 += carry4;
          h4 -= carry4 << 26;
  
          carry1 = (h1 + (long) (1 << 24)) >> 25;
          h2 += carry1;
          h1 -= carry1 << 25;
          carry5 = (h5 + (long) (1 << 24)) >> 25;
          h6 += carry5;
          h5 -= carry5 << 25;
  
          carry2 = (h2 + (long) (1 << 25)) >> 26;
          h3 += carry2;
          h2 -= carry2 << 26;
          carry6 = (h6 + (long) (1 << 25)) >> 26;
          h7 += carry6;
          h6 -= carry6 << 26;
  
          carry3 = (h3 + (long) (1 << 24)) >> 25;
          h4 += carry3;
          h3 -= carry3 << 25;
          carry7 = (h7 + (long) (1 << 24)) >> 25;
          h8 += carry7;
          h7 -= carry7 << 25;
  
          carry4 = (h4 + (long) (1 << 25)) >> 26;
          h5 += carry4;
          h4 -= carry4 << 26;
          carry8 = (h8 + (long) (1 << 25)) >> 26;
          h9 += carry8;
          h8 -= carry8 << 26;
  
          carry9 = (h9 + (long) (1 << 24)) >> 25;
          h0 += carry9 * 19;
          h9 -= carry9 << 25;
  
          carry0 = (h0 + (long) (1 << 25)) >> 26;
          h1 += carry0;
          h0 -= carry0 << 26;
  
          h[0] = (int) h0;
          h[1] = (int) h1;
          h[2] = (int) h2;
          h[3] = (int) h3;
          h[4] = (int) h4;
          h[5] = (int) h5;
          h[6] = (int) h6;
          h[7] = (int) h7;
          h[8] = (int) h8;
          h[9] = (int) h9;
      }
  
  
  }
  