source: trunk/minix/lib/i86/int64/cv64u.s@ 10

!       cv64u() - 64 bit converted to unsigned          Author: Kees J. Bot
!                                                               24 Dec 1995
.sect .text
.define _cv64u, _cv64ul

_cv64u:                         ! unsigned cv64u(u64_t i);
        mov     bx, sp
        mov     cx, 4(bx)
        jmp     0f

_cv64ul:                        ! unsigned long cv64ul(u64_t i);
        mov     bx, sp
        xor     cx, cx
0:      mov     ax, 2(bx)
        mov     dx, 4(bx)
        or      cx, 6(bx)
        or      cx, 8(bx)               ! return UINT/ULONG_MAX if really big
        jz      0f
        mov     ax, #-1
        mov     dx, ax
0:      ret