ARM指令集笔记

ARM指令的基本格式：<opcode>{<cond>}{S}<Rd>,<Rn>{,<opcode2>}

cond:

EQZ=1

NEZ=0

CSC=1

CCC=0

GTZ=0,N=V

LEZ=1,N!=V

AL\

LDMIA R0,{R1-R4}   :R0没变

LDMIA R0!,{R1-R4}  :R0变了

MOV R0 ， #8；R0=8

MOV R0 ,   R1;R0<---R1

MOV R0 , R1,LSL #3;R0<---(R1<<3)

MOV PC, LR;R15<---R14

ADD R0, R1,#1;R0<---(R1+1)

ADDS R0, R1,#1;会影响CPSR的标记位

BIC R0,R0,#0xF;clear bits

ORR R0, R0,  #0xF ;SET BITS

MRS R0, CPSR;R0<---CPSR

BIC R0,R0, #0x1F

ORR R0, R0,#0xD3

MSR CPSR_cxsf , R0

mrc p15, 0, r0, c1, c0, 0;r0<---c1

mcr p15, 0, r0, c1, c0, 0;c1<---r0

mov r1, #9 ;r1<--9

mov r2, r1 ;r2<--r1

mov r2, r1, lsl #3 ;r2<--(r1<<3)

ldr r1, [r0] ;r1<--[r0]

swp r2, r2, [r1] ;r2<--(r2<-->[r1])

ldr r1, [r0, #4] ;r1<--[r0+4]

stmfd sp!, {r0-r2} ;入栈，sp跟新

ldmfd sp!, {r0-r2} ;出栈，sp跟新

GET 2440addr.inc

AREA Init, CODE, READONLY

ENTRY

END

一.Symbol Definition////////////////////////////////////////////////////
1.GBLA/GBLL/GBLS//////////////////////////


GBLA Number1
Number1 SETA 0xaa


GBLL True1
True1 SETL {TRUE}


GBLS String1
String1 SETS "Testing"


2.LCLA/LCLL/LCLS//////////////////////////


LCLA Number2
Number2 SETA 0xaa


LCLL True2
True2 SETL {TRUE}


LCLS String2
String2 SETS "Testing"


3.RLIST//////////////////////////
RegList RLIST {R0-R5,R8,R10}
STMFD SP!,RegList


二.Data Definition////////////////////////////////////////////////////


1.DCB//////////////////////////
Sting DCB "This is a test!"
Parameter DCB 0x33,0x44,0x55
DCB -1,-2,0,1,2


2.DCW//////////////////////////
Data DCW 0,1,2,3


3.DCD//////////////////////////
Data DCD 3,4,5,6


4.DCFD//////////////////////////
Fdata DCFD 0,2E115,-5E7


5.DCFS//////////////////////////
Sdata DCFS 1,2E5,-5E7


6.DCQ//////////////////////////
Data DCQ 100,1000


7.DCDO//////////////////////////
IMPORT externsys
Data DCDO externsys


8.DCI//////////////////////////
MACRO
newinstr $Rd,$Rm
DCI 0Xe15f0f10: CR: (8$Rd: SHL: 12): OR: $Rm


9.SPACE//////////////////////////
DataSpace SPACE 1000


10.MAP//////////////////////////
MAP 0x10 ,R0


11.FIELD//////////////////////////
MAP 0x100
A FIELD 16
B FIELD 32
S FIELD 256


12.LTORG//////////////////////////
LDR R0,=0x12345
ADD R1,R1,R0
MOV PC,LR
LTORG
...


三.Assembly Control////////////////////////////////////////////////////


1.IF/ELSE/ENDIF//////////////////////////


IF Version="V1"
......
ELSE
..........
ENDIF


2.WHILE/WEND//////////////////////////
WHILE Counter<10
.......
WEND


3.MACRO/MEND//////////////////////////
MACRO
CODE_1
LDR R0,=rPDATG
LDR R1,[R0]
ORR R1,R1,#0X01
SRT R1,[R0]
MEND
4.MEXIT//////////////////////////
5.AREA/ALIGN/CODE16/CODE32/ENTRY/END/EQU/EXPORT(GLOBAL)/IMPORT/GET(INCLUDE)/INGBIN/RN/ROUT
AREA Init,CODE,READONLY
AREA Init,CODE,READONLY,ALIGN=3
CODE32
.....
CODE16
.....
ENTRY
END
ABCE EQU label+8
Test EQU 50
Addr EQU 0x55,CODE32
EXPORT main
IMPORT main
GET a1.s
GE T C:\a2.s
INCBIN a1.dat
INCBIN C:\a2.txt
INCBIN a3.bin
Counter RN R0


四.Programming////////////////////////////////////////////////////
1.program structure//////////////////////////
AREA Init,CODE,READONLY
ENTRY
Start
LDR R0,=0x3FF5000
LDR R1,0xFF
STR   R1,[R0]
LDR   R0,=0x3FF5008
LDR   R1,0x01
STR   R1,[R0]
...
END
2.Subroutine call//////////////////////////
AREA Init,CODE,READONLY
ENTRY
Start
LDR R0,=0x3FF5000
LDR R1,0xFF
STR R1,[R0]
LDR R0,=0x3FF5008
LDR   R1,0x01
STR R1,[R0]
BL PRINT_TEXT
...
PRINT_TEXT
...
MOV PC,BL
..
END
3.macro definition//////////////////////////
MACRO
CALLSubfunction $Funtion,$dat1,$dat2
IMPORT $Funtion
MOV R0,$dat1
MOV R1,$dat2
BL Funtion
MEND
...
CALL FADD1,#3,#2
4.Compare And B//////////////////////////
CMP R5,#10
BEQ BRANCH1
...
CMP R1,R2
ADDHI R1,R1,#1
ADDLS R1,R1,#2
...
ANDS R1,R1,#0x80
BNE WAIT


5.LOOP//////////////////////////
MOV R0,#10
LOOP
...
SUBS R0,R0,#1
BEN LOOP
...
6.Data Block Copy//////////////////////////
LDR R0,=DATA_DST
LDR R1,=DATA_SRC
MOV R10,#10
LOOP LDMIA R1!,{R2-R9}
STMIA R0!,{R2,R9}
SUBS R10,R10,#1
BNE LOOP
...
7.Stack Operation//////////////////////////
OUTDAT
STMFD SP! {R0-R7,LR}
...
BL DELAY
...
LDMFD SP! {R0-R7,PC}
8.Table Look//////////////////////////
...
LDR R3,=DISP_TAB
LDR R2,[R3,R5,LSL,#2]
...
DISP_TAB DCD 0xC0, 0xF9, 0xA4, 0x99, 0x92
DCD 0x82, 0xF8, 0x80, 0x90, 0x88, 0x83
DCD 0xC6, 0xA1, 0x86, 0x8E, 0xFF
9.Long Jump//////////////////////////
ADD LR, PC, #4
LDR PC,=JUMP_FUNC
DCD RET_FUNC
...
DCD JUMP_FUNC


10.Samaphore support//////////////////////////
DISP_SEM EQU 0x40002A00
...
DISP_WAIT MOV R1,#0
LDR R0,=DISP_SEM
SWP R1,R1,[R0]
CMP R1,#0
BEQ DISP_WAIT


11.Register//////////////////////////


WDTC EQU 0xE000000
...
LDR R0,=WDTC
MOV R1,#12
STR R1,[R0]


12.Piece of external parts//////////////////////////
LDR R0,=GPIO_BASE
MOV R1,#0x00
STR R1,[R0,#0x04]
MOV R1,#0x10
STR R1,[R0,#0x0C]