minix/lib/i86/em/em_sar2.s
2009-11-09 10:26:00 +00:00

33 lines
419 B
ArmAsm

.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)