Decorat

Decorat is a type of assembly language designed by islptng.

Syntax

Each line is:

keyword argument

For example:

put 15

To define a label, write

labelname: put 15

To use a label, enclose it in <> :

jnz <labelname>

Comment, like other assembly, is a semicolon.

nop 0 ; This line does nothing!

How it works

It has a register to store a value.

The arguments are just part of the memory (and thus we can modify them).
For example:

         get <const30> ; reg = 30
         put <r> ; memory[r] = 30
r:       jmp 19 ; now "jmp 30" after the above line is executed
const30: nop 30 ; define a constant

Advanced label

We can use braces in label definitions. An advanced example:

 ifzero: jnz <else> {
                       ; some code here
}        jmp <endif>
   else: {
      ifneg: jlz <else> {
                       ; some code here
    }        jmp <endif>
       else: {
                       ; some code here
    } endif:
} endif:

which, without braces, looks like:

        ifzero: jnz <else1>
                              ; some code here
                jmp <endif1>
  else1: ifneg: jlz <else2>
                              ; some code here
                jmp <endif2>
         else2:               ; some code here
endif1: endif2:

Instruction set

Dumb decorat

0 sub : reg -= mem[arg];
1 dmp : mem[arg] = reg; reg = 0;
2 leq : if(reg <= 0) goto arg;

Reduced decorat

0 jnz : if(reg != 0) goto arg;
1 jlz : if(reg < 0) goto arg;
2 jmp : goto arg;
3 get : reg = mem[arg];
4 put : mem[arg] = reg;
5 dec : reg -= mem[arg];
6 nor : reg = ~(reg | mem[arg]);
7 shr : reg >>= mem[arg];