ARM汇编语言编写,求问大佬答:area sub,code,readonly entry LDR R0,100 LDR R1,=0X40002000 LDR R2,,=0X40003000 LDR R7,=0X40004000 LOOP: LDR R3,[R1] LDR R4,[R2] ADD r1,r1,#4 ADD r2,r2,#4 ADD R5,R3,R4 STR R5,[R7] SUBS R0,R0,#1 BNE LOOP ...
...编写一段程序实现在C语言程序中调用汇编语言程序,实现将1kb的内存块...答:(原地址R0,目标地址R1,数量R2)LDR R0,=src LDR R1,=dst MOV R2,#256 Loop LDR R3,[R0],#4 STR R3,[R1],#4 SUBS R2,R2,#1 BNE Loop
嵌入式简单程序编写?答:下面是arm汇编代码 1,Start LDRr0, =src;LDRr1, =dst;MOVr2, #26; //总共搬移多少个字 MOVsp, #0x400;blockcopy MOVSr3,r2, LSR #3;BEQcopywords;STMFDsp!, {r4-r7};octcopy LDMIAr0!, {r4-r7};STMIAr1!, {r4-r7};SUBSr3, r3, #1;BNEoctcopy;LDMFDsp!, {r4-r7};copywords ...