Brainfunk

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Overview

Brainfunk is derivative of Brainfuck language with aims to:

  • Unify cell pointer and cell value increment and decrement operations to single + and - operations. Remove > and < operations.
  • Introduce fast copy instruction usable between all address spaces.
  • Allow macro definition for custom symbol definition and code reduction
  • Allow to read/write program space
  • Support multiple I/O ports for additional hardware addressing
  • Enable brainfuck compatible mode
  • Allow absolute integer constants
Base commands
Command Description
^ Increment selected object
v Decrement selected object
( Jump past the matching ) if the object value is zero
) Jump back to the matching ( if the object value is nonzero
@ Set object selection index to 0. This is index means accumulator,
$ Increment object selection index
~ Copy value from previous selected object to current selected object
: Start macro, first symbol to the right is new defined symbol
; End macro started by :
Object table
Index Description
0 A - Accumulator
1 DP - Data pointer
2 (DP) - Data value
3 IP - Interface pointer
4 (IP) - Interface value
5 PC - Program counter
6 PP - Program pointer
7 (PP) - Program value
8 SP - Stack pointer
9 (SP) - Stack value
Port address table
Address Description
0 Null
1 Standard output
2 Standard input
3 Delay [ms]
4 Sound [Hz]

Brainfuck compatibility code

These are defined as macros for easy brainfuck code inclusion.

Symbol Code
+ @$$^
- @$$v
< @$^
> @$v
[ @$$(
] @$$)
, @$$$(v)^^@$$@$$$$~
. @$$$(v)^@$$$$@$$~

Aditional macros

Symbol Code Description
# @$ Shortcut for data pointer DP object
* @$$ Shortcut for data value (DP) object
& @$$$ Shortcut for interface address IP object
% @$$$$ Shortcut for interface value (IP) object
? @$$$$$ Shortcut for program counter PC object
! (v) Clear selected object.

Sample code

Description Code
Increment accumulator @^
Decrement accumulator code>@v
Cat ,[.,] ,[.,]
Clear accumulator @!
Move value >[-]<[->+<] *@~*!#^@*~
Copy value >[-]>[-]<<[->+>+<<]>>[-<<+>>] *@~#^@*~
Swap value >[-]<<[->>+<<]>[-<+>]>[-<+>] *@~#^^@*~#v*@~#v@*~#^^*@~#v@*~