ARM實(shí)驗(yàn)匯編代碼.

1、AREA Exa mp le1,C0DE,READ0NLY ENTRYCODE32START MOV R0,#15MOV R1,#8ADDS R0,R0,R1B STARTENDTest2.sX EQU 11Y EQU 8BIT23 EQU (1<<23AREA Exa mp le3,CODE,READONLY ENTRYCODE32STARTMOV R0,#XADD R3,R0,R1MOV R8,R3MOR R1,#YMVN R0,#0XA0000007SUB R5,R0,R8,LSL #3MOV R0,#YADD R0,R0,R0,LSL #2MOV R0,R0,LSR #1M

2、OV R1,#XMOV R1,R1,LSL #1CMP R0,R1LDRHI R2=0XFFFF0000ANDHI R5,R5,R2ORRLS R5,R5,#0X000000FFTST R5,#BIT32BICNE R5,R5,#0X00000040B STARTEND*Test3 s*Y EQU 8BIT23 EQU (1<<23X EQU 11AREA Exa mp le3,C0DE,READ0NLY ENTRYCODE32STARTMOV R0,#XMOV R1,#YADD R3,R0,R1MOV R8,R3MVN R0,#0XA0000007SUB R5,R0,R8,LSL

3、 #3MOV R0,#YADD R0,R0,R0,LSL #2MOV R0,R0,LSR #1MOV R1,#XMOV R1,R1,LSL #1CMP R0,R1LDRHI R2=0XFFFF0000ANDHI R5,R5,R2ORRLS R5,R5,#0X000000FFTST R5,#BIT23BICNE R5,R5,#0X00000040B STARTEND/*Test4 s* * ;Name :test4.s Function :Caculate XM Entrance p arametre : ;Out p arametre :R0 Result Source occ up ati

4、on :R0,R1 ;Explan ati on :X EQU 9 n EQU 8AREA Exam ple4,CODE,READONLYENTRYCODE32START LDR SP,=0X40D03F0DLDR R1,=nLDR R0,=XBL POWHALT B HALT;Name :POW Function :zhe ngshu che ngfang Entrance p arametre : ;Out p arametre : Source occ up ati on :R0,R1 ;Explan ati on :This code does nt care the nu mbero

5、verflow ；*POWSTMFD SP !,R1-R12,LRMOVS R2,R1MOVEQ R0,#1BEQ PO W_ENDCMP R2,#1BEQ PO W_ENDSUB R2,R2,#1MOV R1,R0PO W_L1 BL DO_MULSUBS R2,R2,#1BNE PO W_L1PO W_END LDMFD SP !,R1-R12, PC;Name :DO_MUL ;Fun ctio n :MULTI PLE OF 32BIT DATA Entrance p arametre :R0 CHENGSHU ;R1 BEICHENGSU ;Out p arametre :R0 Re

6、sult Source occ up ati on :R0,R1 ;Explan ati on :DO_MUL MUL R0,R1,R0MOV P C,LREND*Test5 s*;Name :test5.s;Fun ctio n :Caculate 1+2+3+NEntrance p arametre :;Out p arametre :;Source occ up ati on :;Ex plan ation :N>=0, if N=0 reult=O,if N=1 resualt=1N EQU 100AREA Exa mp le5,CODE,READONLYENTRYCODE32A

7、RM_CODE LDR SP ,=0X40003F00 ;There should be no sp ace beforeARM_CODE ADR R0,THUMB_CODE+1BX R0LTORGCODE16THUMB_CODELDR R0,=NBLSUM_NBTHUMB CODE;Name :SUM_N;Fun etio n :Caculate 1+2+3+N;En tra nee P arametre :RO N;Out Parametre :RO Result;Souree Occup atio n :RO;Ex plan ation :N>=0, if N=0 result=O

8、,if N=1 resualt=1;if any overflow result=O;SUM_NP USH R1-R7,LRMOVS R2,ROBEQ SUM_ENDCMP R2,#1BEQ SUM_ENDMOV R1,#1MOV RO,#OSUM_L1 ADD RO,R1BCS SUM ERRCMP R1,R2BHS SUM_ENDADD R1,#1B SUM L1SUM_ERR MOV R0,#0SUM_END POP R1-R7, PCEND/*Test6 s* * * ;Name :tes6.sFunction :show if for while switch ;En tra nee

9、 P arametre :;Out P arametre :Source Occup atio n :;Explan ati on :;* areaExa mp le6,CODE,READONLY ENTRYCODE32START ;if(x>yz=100;else z=50MOV R0,#76MOV R1,#243CMP R0,R1MOVHI R2,#100MOVLS R2,#50;for(i=0;iv10;i+FOR_L1 ; ; x+; ; MOV R0,#0 MOV R2,#0 CMP R2,#10 BHS FOR_END ADDR0,R0,#1 ADD R2,R2,#1 B F

10、OR_L1 NOP ;while(xv=y ; ; x*=2; ; MOV R0,#1 MOVR1,#20 B WHILE_L2 FOR_END WHILE_L1 WHILE_L2 MOV R0,R0,LSL #1 CMPR0,R1 BLS WHILE_L1 WHILE_END NOP ;do ;x-; ;while(x>0 MOV R0,#5DOWHILE_L1 ADD R0,R0,#-1 DOWHILE_L2 MOVS R0,R0 BNE DOWHILE_L1DOWHILE_END NOP ;switch(ke y&0x0f ;case 0: ; case 2: ; case 3:x=key+y; break;case 5:x=key-y; break; ; case 7:x=key*y; break;default:x=168; break; ; MOV R1,#3 MOV R2,#2 SWITCH AND R2,R2,#0X0FCASE_0 CMP R2,#0 CASE_2 CMPNE R2,#2 CASE_3 CMPNE R2,#3 BNE CASE_5ADD R0,R2,R1 B