message: Use std checked_div
diff: @@ -34,8 +34,8 @@ fn main() {
  assert_eq!(0b0000000000000000000000000010000010000000000000000000000000000000_0000000000100000000000000000000000001000000000000100000000000000u128.leading_zeros(), 26);
  assert_eq!(0b0000000000000000000000000010000000000000000000000000000000000000_0000000000000000000000000000000000001000000000000000000010000000u128.trailing_zeros(), 7);
  - checked_div_i128(0i128, 2i128);
  - checked_div_u128(0u128, 2u128);
  + 0i128.checked_div(2i128);
  + 0u128.checked_div(2u128);
  assert_eq!(1u128 + 2, 3);
  assert_eq!(0b100010000000000000000000000000000u128 >> 10, 0b10001000000000000000000u128);
  @@ -61,18 +61,3 @@ fn map(a: Option<(u8, Box<Instruction>)>) -> Option<Box<Instruction>> {
  Some((_, instr)) => Some(instr),
  }
  }
  -
  -fn checked_div_i128(lhs: i128, rhs: i128) -> Option<i128> {
  - if rhs == 0 || (lhs == -170141183460469231731687303715884105728 && rhs == -1) {
  - None
  - } else {
  - Some(unsafe { intrinsics::unchecked_div(lhs, rhs) })
  - }
  -}
  -
  -fn checked_div_u128(lhs: u128, rhs: u128) -> Option<u128> {
  - match rhs {
  - 0 => None,
  - rhs => Some(unsafe { intrinsics::unchecked_div(lhs, rhs) })
  - }
  -}
  