浙江工业大学-嵌入式系统原理-实验4

浙江工业大学-嵌入式系统原理-实验4

-CAL-FENGHAI-(2024YEAR-YICAI)_JINGBIAN

嵌入式系统 实验四

#include <>

extern int strcmp(char *d,char *s); int main() {

int result;

char *str1=\ char *str2=\ printf (\ printf (\ result=strcmp(str1,str2); printf (\ return(0); }

AREA SCopy, CODE, READONLY GLOBAL strcmp strcmp

MOV R4, #1

LE LDRB R2, [R0],#1 LDRB R3, [R1],#1 CMP R2,R3 MOVNE R4, #0 CMP R2, #0 BNE LE

MOV R0, R4 MOV PC, LR END

#include <>

extern void strscopy(char *d,char *s); int main() {

char *str1=\Technology\ char *str2;

strscopy(str2,str1); printf (\ printf (\ return(0); }

2

AREA SCopy, CODE, READONLY GLOBAL strscopy

strscopy

LE LDRB R2, [R1],#1 STRB R2, [R0],#1 CMP R2, #0 BNE LE

MOV PC, LR END

int add1(int a, int b, int c, int d, int e, int f) {int sum;

sum=a+b+c+d+e+f; return sum; }

AREA SCopy, CODE, READONLY GLOBAL strscmp IMPORT add1 ENTRY CODE32 strscmp

MOV R0, #2 ADD R1, R0, R0 ADD R2, R1, R0 ADD R3, R1, R2 ADD R3, R3, R0 STR R3, [SP, #-4]! ADD R3, R1, R2 STR R3, [SP, #-4]! ADD R3, R2, R0 BL add1 MOV R8, R0 END