vrosnet / gohackvm Goto Github PK

$ go get github.com/papplampe/gohackvm
$ ./gohackvm
Usage of gohackvm:
  -c="": code to be executed
  -cf="": file containing code to be executed
  -l=false: shall the stack be logged
  -m="": the initial memory (cell0,cell1,...)
  -mf="": file containing initial memory (cell0,cell1,...)


Interprets following "bytecodes":
' ': Do nothing (used for readability purposes)
'p': Print S0 as an integer
'P': Print S0 as an ASCII character (only the least significant 7 bits of the value are used)
'0'..'9': Push the value 0..9 on the stack
'+', '-', '*', '/': Push S1+S0, S1-S0, S1*S0, S1/S0
':': Push -1 if S1<S0, 0 if S1=S0, or 1 S1>S0
'g': Add S0 to the program counter
'?': Add S0 to the program counter if S1 is 0
'c': Push the program counter on the call stack and set the program counter to S0
'$': Set the program counter to the value popped from the call stack
'<': Push the value of memory cell S0
'>': Store S1 into memory cell S0
'^': Push a copy of S<S0+1> (ex: 0^ duplicates S0)
'v': Remove S<S0+1> from the stack and push it on top (ex: 1v swaps S0 and S1)
'd': Drop S0
'!': Terminate the program


for more about hackvm see
	http://progopedia.com/language/hack-vm/
	http://www.hacker.org/hvm/