循环比较

####################sem.s

.section .data
data_items:
.long 3,67,77,222,45,0

.section .text
.globl _start
_start:
movl $0, %edi
movl data_items(,%edi, 4), %eax
movl %eax, %ebx

start_loop:
 cmpl $0, %eax
 je loop_exit
 incl %edi
 movl data_items(,%edi, 4), %eax
 cmpl %ebx, %eax
 jle start_loop
 
 movl %eax, %ebx
 jmp start_loop
loop_exit:
 movl $1, %eax
 int $0x80



 

编译方法：

as sem.s -o sem.o

ld sem.o -o sem

查看结果：

echo $?