C变为汇编语言

#include<reg51.h>
void delay(unsigned char dly)
{
unsigned char i,j;
for(i=255;i>0;i--)
for(j=dly;j>0;j--)
;
}
void main(void)
{
unsigned char i;
i=0;
while(1)
{
if(i==3)
i=0;
else
i++;
P1=~(1<<i);
delay(40);
}
}