showsin: jmp short show
table dw ag0,ag30,ag60,ag60,ag90,ag120,ag150,ag180
ag0 db '0',0
ag30 db '0.5',0
ag60 db '0.866',0
ag90 db '1',0
ag120 db '0.866',0
ag150 db '0.5',0
ag180 db '0',0
error db 'input ovreflow',0
show:push bx
push es
push di
mov bx,0b800h
mov es,bx
mov di,160*12+40*2
mov ah,0
mov bl,30
div bl
cmp ah,0 ;这三条指令检测al中角度是否超出范围
mov bx,0 ;ah中为余数,余数不为0,则显示错误
je show_error
mov bl,al
mov bh,0
add bx,bx
mov bx,cs:table[bx]
shows: mov ah,cs:[bx]
cmp ah,0
je showret
mov es:[di],ah
inc bx
add di,2
jmp short shows
show_error:mov ah,cs:error[bx]
cmp ah,0
je showret
mov es:[di],ah
inc bx
add di,2
jmp short show_error
showret:pop di
pop es
pop bx
ret
code ends
end start
王爽《汇编语言》16章16.3计算sinx完整版
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转载自blog.csdn.net/weixin_41944412/article/details/80699833
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