Gen7 Crit Rate

bool __fastcall calcIsCrit(unsigned int stage, int affectionAmp)
{
  unsigned int chance; // r1
  bool isCrit; // r0

  if ( stage >= 4 ) // bad, out of range for table
  {
    (gfl2::debug::GFLassert)(0, 0, 0, 0);
    isCrit = 0;
  }
  else // good
  {
    chance = (critChanceTable[stage] / affectionAmp);
    if ( !chance ) // 0
      chance = 1; // ensure >0 for so we don't % by 0 in the event of 255 affection
    isCrit = gfl2::math::SFMTRandom::Next(dword_313B9C4, chance) == 0; // crit if (rand % n == 0)
  }
  return isCrit;
}

// Battle.rodata:~~~ critChanceTable    DCB 24, 8, 2, 1 // with 0xFF affection, divide by 2