source: trunk/minix/lib/i86/em/em_sar2.s@ 9

.define .sar2
.text

.sar2:
                                ! bx, descriptor address
                                ! ax, index
        pop     cx
        pop     dx              ! base address
        push    cx
        xchg    di,dx           ! di = base address, dx is saved di
        sub     ax,(bx)
        mov     cx,4(bx)
        push    dx
        imul    cx
        pop     dx
        add     di,ax
        sar     cx,#1
        jnb     1f
        pop     bx
        pop     ax
        stosb
        mov     di,dx
        jmp     (bx)
1:
        pop     bx
        mov     ax,si
        mov     si,sp
        rep
        mov
        mov     sp,si
        mov     si,ax
        mov     di,dx
        jmp     (bx)