xxtea_decrypt

__int64 __fastcall xxtea_decrypt(__int64 a1, __int64 a2, const void *a3, __int64 a4)
{
  __int64 result; // x0
  bool v5; // [xsp+Ch] [xbp-44h]
  unsigned __int64 i; // [xsp+10h] [xbp-40h]
  unsigned __int64 j; // [xsp+10h] [xbp-40h]
  char v11[16]; // [xsp+38h] [xbp-18h] BYREF
  __int64 v12; // [xsp+48h] [xbp-8h]

  v12 = *(_QWORD *)(_ReadStatusReg(ARM64_SYSREG(3, 3, 13, 0, 2)) + 40);
  memcpy(v11, a3, sizeof(v11));
  for ( i = 0LL; ; ++i )
  {
    v5 = 0;
    if ( i < 0x10 )
      v5 = v11[i] != 0;
    if ( !v5 )
      break;
  }
  for ( j = i + 1; j < 0x10; ++j )
    v11[j] = 0;
  result = sub_C85A7C(a1, a2, v11, a4);
  _ReadStatusReg(ARM64_SYSREG(3, 3, 13, 0, 2));
  return result;
}