add64.s

Minix比较全的源码

!	add64() - 64 bit addition			Author: Kees J. Bot
!								24 Dec 1995
.sect .text
.define _add64

_add64:				! u64_t add64(u64_t i, u64_t j);
	push	bp
	mov	bp, sp
	mov	bx, 4(bp)
	mov	ax, 6(bp)
	add	ax, 14(bp)
	mov	(bx), ax
	mov	ax, 8(bp)
	adc	ax, 16(bp)
	mov	2(bx), ax
	mov	ax, 10(bp)
	adc	ax, 18(bp)
	mov	4(bx), ax
	mov	ax, 12(bp)
	adc	ax, 20(bp)
	mov	6(bx), ax
	mov	ax, bx
	pop	bp
	ret