source: trunk/minix/lib/i386/em/em_sti.s@ 10

.sect .text; .sect .rom; .sect .data; .sect .bss
.sect .text
.define .sti
.define .sts

        ! #bytes in ecx
        ! address in ebx
        ! save edi/esi. they might be register variables
.sts:
        pop     edx
        sar     ecx,1
        jnb     1f
        pop     eax
        movb    (ebx),al
        jmp     edx
1:
        sar     ecx,1
        jnb     1f
        pop     eax
        o16 mov (ebx),ax
        jmp     edx
1:
        push    edx
        mov     edx,edi
        mov     edi,ebx
        pop     ebx
        jmp     1f
.sti:
        ! only called with count >> 4
        mov     edx,edi
        mov     edi,ebx
        pop     ebx
        sar     ecx,2
1:
        mov     eax,esi
        mov     esi,esp
        rep movs
        mov     esp,esi
        mov     edi,edx
        mov     esi,eax
        jmp     ebx