source: trunk/minix/lib/i86/misc/io_inl.s@ 16

!       inl() - Input one dword                         Author: Kees J. Bot
!                                                               18 Mar 1996
!       unsigned inl(U16_t port);

        o32 = 0x66

.sect .text
.define _inl
_inl:
        push    bp
        mov     bp, sp
        pushf
        cli                             ! eax is not interrupt safe
        mov     dx, 4(bp)               ! port
        .data1  o32
        in      dx                      ! read 1 dword
        .data1  o32
        push    ax                      ! push eax
        pop     ax
        pop     dx                      ! dx:ax = eax
        popf
        pop     bp
        ret