mov eax, neg 1000h
    

Code:

mov eax, neg 1000h
    

yes ... i could easily do it with "0-1000h"
but it would be more elegant, more "neat", with "neg".

(never satisfied (me) ... yes, it is also true ! )

a little macro bitRAKE ? <--

mov eax, -1000h    

mov eax, -$1000    

mov eax,-0x1000    

macro mov dest,src {
  temp equ src
  match =neg num,src \{
    restore temp
    temp equ -num
  \}
  mov dest,num
}    

imul dest, src, -1 probably will handle all other flavors of src, then.

Should that be: imul dest, src, neg 1

neg fix -    

Isn't it my turn to be Mr. Hyde?

macro mov dest,src {
  temp equ src
  match =neg num,src \{
    restore temp
    temp equ -num
  \}
  mov dest,temp
  restore temp
}    

single_operand_operators:
 db 1,'+',0
 db 1,'-',083h
 db 3,'neg',083h
 db 3,'not',0D0h
 db 3,'plt',0E1h
 db 3,'rva',0E0h
 db 0