source: trunk/minix/lib/ack/i386/em/em_loi.s@ 9

.sect .text; .sect .rom; .sect .data; .sect .bss
.sect .text
.define .loi
.define .los

        ! #bytes in ecx
        ! address in ebx
        ! save esi/edi. they might be register variables
.los:
        pop     edx
        mov     eax,ecx
        sar     ecx,1
        jnb     1f
        movsxb  eax,(ebx)
        push    eax
        jmp     edx
1:
        sar     ecx,1
        jnb     1f
        movsx   eax,(ebx)
        push    eax
        jmp     edx
1:
        push    edx
        mov     edx,esi
        mov     esi,ebx
        pop     ebx
        sub     esp,eax
        jmp     1f

.loi:
        ! only called with size >= 4
        mov     edx,esi
        mov     esi,ebx
        pop     ebx
        sub     esp,ecx
        sar     ecx,2
1:
        mov     eax,edi
        mov     edi,esp
        rep movs
        mov     esi,edx
        mov     edi,eax
        jmp     ebx