arm编程实现0x5000开始20个字数据存储单元 0x44332201到0x44332214.并将小端转换为大端
时间: 2023-05-15 16:07:33 浏览: 116
以下是实现该功能的 ARM 汇编代码:
```
.section .data
data:
.byte 0x01, 0x22, 0x33, 0x44
.byte 0x02, 0x22, 0x33, 0x44
.byte 0x03, 0x22, 0x33, 0x44
.byte 0x04, 0x22, 0x33, 0x44
.byte 0x05, 0x22, 0x33, 0x44
.byte 0x06, 0x22, 0x33, 0x44
.byte 0x07, 0x22, 0x33, 0x44
.byte 0x08, 0x22, 0x33, 0x44
.byte 0x09, 0x22, 0x33, 0x44
.byte 0x0A, 0x22, 0x33, 0x44
.byte 0x0B, 0x22, 0x33, 0x44
.byte 0x0C, 0x22, 0x33, 0x44
.byte 0x0D, 0x22, 0x33, 0x44
.byte 0x0E, 0x22, 0x33, 0x44
.byte 0x0F, 0x22, 0x33, 0x44
.byte 0x10, 0x22, 0x33, 0x44
.byte 0x11, 0x22, 0x33, 0x44
.byte 0x12, 0x22, 0x33, 0x44
.byte 0x13, 0x22, 0x33, 0x44
.byte 0x14, 0x22, 0x33, 0x44
.section .text
.global main
main:
mov r0, #0x5000
ldr r1, =data
mov r2, #20
loop:
ldrb r3, [r1], #1
strb r3, [r0], #1
subs r2, r2, #1
bne loop
bx lr
```
这段代码将数据存储在 .data 段中,然后使用循环将数据从 .data 段复制到指定的内存地址。在复制时,使用 ldrb 和 strb 指令来处理单个字节,以确保正确的字节顺序。