struct decrypt_str {
    signed char pad8[8]; // NOOP
    uint32_t f8;
    signed char pad608[596]; // NOOP
    uint32_t f608;
};

void decrypt(uint32_t data_x_in, uint32_t data_y_in, int32_t cur_cycle_num)
{
  uint32_t v5;
  uint32_t v6;
  int v7;
  int to_compare;
  int offset;
  signed int bit_and_1;
  signed int bit_and_2;
  struct decrypt_str *x_scale_str; // maybe global?

  v5 = data_y_in & 3;
  v6 = data_x_in & 3;
  v7 = (((v6 + v5 * v6 + 13) * (v6 + v5 * v6 + 13)) >> 2) & 1;
  to_compare = v7 + 2 * ((v6 + v5 * v6 + 13) * (v6 + v5 * v6 + 13) & 1) + 1;
  if ( to_compare == 3 )
  {
    bit_and_2 = 3;
    bit_and_1 = 15;
    offset = 4;
    to_compare = 2;
  }
  else
  {
    offset = 5 - (v7 + 2 * ((v6 + v5 * v6 + 13) * (v6 + v5 * v6 + 13) & 1));
    bit_and_1 = ((1 << (6 - to_compare)) - 1);
    bit_and_2 = ((1 << to_compare) - 1);
  }

  x_scale_str = &start_x_scale[cur_cycle_num];
  x_scale_str->f8 = (v9 | (((v12 >> to_compare) | ((bit_and_2 & v12) << offset)) & 3 | 4
                                                                             * (((v12 >> to_compare) | ((bit_and_2 & v12) << offset)) & 0x3C | v5)) ^ 0xEA) >> 4;
  x_scale_str->f608 = v10 & 0xF00 | (((v11 >> offset) | ((bit_and_1 & v11) << to_compare)) & 3 | 4
                                                                                       * (((v11 >> offset) | ((bit_and_1 & v11) << to_compare)) & 0x3C | v6)) ^ 0xEA;
}; // mostly ok