汇编AND操作符

<pre><code class=”lang-bash”>section .text
global _start ;must be declared for using gcc

_start: ;tell linker entry point
mov ax, 8h ;getting 8 in the ax
and ax, 1 ;and ax with 1
jz evnn
mov eax, 4 ;system call number (sys_write)
mov ebx, 1 ;file descriptor (stdout)
mov ecx, odd_msg ;message to write
mov edx, len2 ;length of message
int 0x80 ;call kernel
jmp outprog

evnn:

mov ah, 09h
mov eax, 4 ;system call number (sys_write)
mov ebx, 1 ;file descriptor (stdout)
mov ecx, even_msg ;message to write
mov edx, len1 ;length of message
int 0x80 ;call kernel

outprog:

mov eax,1 ;system call number (sys_exit)
int 0x80 ;call kernel

section .data
even_msg db 'Even Number!' ;message showing even number
len1 equ $ – even_msg

odd_msg db 'Odd Number!' ;message showing odd number
len2 equ $ – odd_msg
</code></pre>