SoxSaber / Lvm

a tiny virtual machine based on cpu instruction set

Lvm

   --- A simple virtual machine based on cpu  instruction  set.
       Includes some DIY instructions,and it is still updating.
                                                    by:leviathan

##Building and Running :

###Linux,*nix,Mac OSX:

   $ git clone https://github.com/Leviathan1995/lvm.git
   $ make
   $ ./lvm

##Example :

###Source code: 计算 1+2+3+4...+10=

   start : OPCLEAR AL     #AL=0
           OPCLEAR CL     #CL=0
           OPLOADVB CL 1  #CL=1
           OPLOADVB AL 1  #AL=1     put 1 to AL
   add:    OPLOAD AL CL   #AL=CL
           OPADDB AL 10   #AL=AL+[10]
           OPSTOREB 10 AL #[10]=AL  
           OPINC CL       #CL=CL+1
           OPCMPVB CL 11  #CMP 11
           OPJG    quit
           OPJNG    add
   quit:   OPPRINTR AL
           OPHALT

###Out:

##Syntax

• 注释使用 '#'
• 格式: 操作码 操作数1 操作数2
• 优先级: 寄存器需要在立即数或内存地址前面 例如 OPADDB AL [10]

##Support Instruction:

Instruction	Explanation	Example
OPHALT	stop	OPHALT
OPCLEAR	register=0	OPCLEAR AL
OPINIT	id=register	OPINIT i AL
OPINITLIST	a={1,2,3,4,5}	OPINITLIST a 1,2,3,4,5
OPASSIGN	id=reg/num	OPASSIGN i 0
OPBINADD	id1=id2+id3	OPBINADD id1 id2 id3
OPBINSUB	id1=id2-id3	OPBINSUB id1 id2 id3
OPBINMUL	id1=id2*id3	OPBINMUL id1 id2 id3
OPBINDIV	id1=id2/id3	OPBINDIV id1 id2 id3
OPADDB	al=al+[10]	OPADDB AL [10]
OPADDVB	al=al+1	OPADDVB AL 1
OPSUBB	al=al-[10]	OPSUBB AL [10]
OPSUBVB	al=al-1	OPSUBVB AL 1
OPLOAD	al=cl	OPLOAD AL CL
OPLOADVB	al=1	OPLOADVB AL 1
OPSTOREB	[10]=al	OPSTOREB 10 AL
OPINC	al=al+1	OPINC AL
OPDEC	al=al-1	OPDEC AL
OPCMPVB	cl cmp 5	OPCMPVB CL 5
OPJG	if greatet jump to label	OPJG cmp1 cmp2 label
OPJNG	if not greater jump to label	OPJNG cmp1 cmp2 label
OPPRINTR	output al to terminal	OPPRINTR AL
OPPRINTRLIST	output list to terminal	OPPRINTRLIST list
OPEND	block end	OPEND block1
OPPAUSE	use debug	OPPAUSE

Lincense:

MIT