source: trunk/minix/lib/ack/i386/em/em_lar4.s@ 9

.sect .text; .sect .rom; .sect .data; .sect .bss
.sect .text
.define .lar4

.lar4:
                                ! ebx, descriptor address
                                ! eax, index
        sub     eax,(ebx)
        mov     ecx,8(ebx)
        imul    ecx
        pop     ebx
        pop     edx             ! base address
        add     edx,eax
        sar     ecx,1
        jnb     1f
        xor     eax,eax
        movb    al,(edx)
        push    eax
        jmp     ebx
1:
        sar     ecx,1
        jnb     1f
        xor     eax,eax
        o16 mov ax,(edx)
        push    eax
        jmp     ebx
1:
        xchg    edx,esi         ! saved esi
        mov     eax,ecx
        sal     eax,2
        sub     esp,eax
        mov     eax,edi         ! save edi
        mov     edi,esp
        rep movs
        mov     edi,eax
        mov     esi,edx
        jmp     ebx