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

.define .sti
.define .sts
.text

        ! #bytes in cx
        ! address in bx
        ! save di/si. they might be register variables
.sts:
        mov     dx,di           ! save di
        mov     di,bx
        pop     bx              ! return address
        sar     cx,#1
        jnb     1f
        pop     ax
        stosb
        mov     di,dx
        jmp     (bx)
.sti:
        ! only called with count > 4
        mov     dx,di
        mov     di,bx
        pop     bx
        sar     cx,#1
1:
        mov     ax,si
        mov     si,sp
        rep
        mov
        mov     sp,si
        mov     di,dx
        mov     si,ax
        jmp     (bx)