# zero

```
xor eax, eax
```

# one
```
xor eax, eax
inc eax
```

# next
```
inc ax
```

# prev
```
dec ax
```

# sum
```
mov dx, ax
add dx, bx
```

# sub
```
mov rdx, rax
sub rdx, rbx
```

# imul
```
imul bl
mov dx, ax
```

# idiv
```
cwd
idiv bx
mov dx, ax 
```