Supporting functions and runtime for the game corewars
Core Wars programs are written in a custom assembly-like language named redcode.
|Opcode |Description |
|:----------------------:|:----------------------------------------------------|
|dat |Data, terminates thread on execution |
|mov |Move, copies instruction from src to target |
|add |Add |
|sub |Subtract |
|mul |Multiply |
|div |Divide |
|mod |Modulo |
|jmp |Unconditional jump |
|jmz |Jump if zero |
|jmn |Jump if not zero |
|djn |Decrement and jump if not zero |
|spl |Split (add address to process queue) |
|cmp |Compare (same as seq) |
|seq |Skip if equal |
|sne |Skip if not equal |
|slt |Skip if less than |
|ldp |Load from P-space |
|stp |Save to P-space |
|nop |No operation |
|Mode |Description |
|:----------------------:|:----------------------------------------------------|
|A |A-field to A-field |
|B |B-field to B-field |
|AB |A-field to B-field |
|BA |B-field to A-field |
|F |A-field to A-field AND B-field to B-field |
|X |A-field to B-field AND B-field to A-field |
|I |Entire Opcode is moved |
|Mode |Description |
|:----------------------:|:----------------------------------------------------|
|# |Immediate |
|$ |Direct |
|* |A-field indirect |
|@ |B-field indirect |
|{ |A-field indirect with predecrement |
|< |B-field indirect with predecrement |
|} |A-field indirect with postincrement |
|> |B-field indirect with postincrement |
The Imp is a simple program that just copies itself forward one address forever
MOV 0, 1
```
...
MOV 0, 1 <--- PC
... <--- Target
...
MOV 0, 1
MOV 0, 1 <--- PC
... <--- Target
```
The Dwarf bombs the core at regular intervals, but if the coresize is a multiple of 4, it will not bomb itself
ADD #4, 3
MOV 2, @2
JMP -2
DAT #0, #0
```
...
ADD #4, 3 <--- PC
MOV 2, @2
JMP -2
DAT #0, #0 <--- Target
...
...
ADD #4, 3
MOV 2, @2 <--- PC
JMP -2
DAT #0, #4 <--- Target
...
...
...
Dat #0, #4 <--- Indirect target
...
...
ADD #4, 3 <--- Target
MOV 2, @2
JMP -2 <--- PC
DAT #0, #4
...
...
...
Dat #0, #4
...
```
Copyright © 2017 Will Johnston
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