em_cms.s

来自「minix3的源代码」· S 代码 · 共 24 行

.define .cms

	! #bytes in cx
	.text
.cms:
	pop     bx              ! return address
	mov     dx,sp
	push	si
	push	di
	mov     si,dx
	add     dx,cx
	mov     di,dx
	add     dx,cx
	sar     cx,#1
	repe
	cmp
	je      1f
	inc     cx
1:
	pop	di
	pop	si
	mov     sp,dx
	jmp     (bx)