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/* $Id: atomic.S,v 1.1.1.1 2004-04-15 01:33:42 phoenix Exp $

 * atomic.S: These things are too big to do inline.

 *

 * Copyright (C) 1999 David S. Miller (davem@redhat.com)

 */

#include 

        .text

        .align  64

        .globl  atomic_impl_begin, atomic_impl_end

        .globl  __atomic_add

atomic_impl_begin:

__atomic_add: /* %o0 = increment, %o1 = atomic_ptr */

        lduw    [%o1], %g5

        add     %g5, %o0, %g7

        cas     [%o1], %g5, %g7

        cmp     %g5, %g7

        bne,pn  %icc, __atomic_add

         membar #StoreLoad | #StoreStore

        retl

         add    %g7, %o0, %o0

        .globl  __atomic_sub

__atomic_sub: /* %o0 = increment, %o1 = atomic_ptr */

        lduw    [%o1], %g5

        sub     %g5, %o0, %g7

        cas     [%o1], %g5, %g7

        cmp     %g5, %g7

        bne,pn  %icc, __atomic_sub

         membar #StoreLoad | #StoreStore

        retl

         sub    %g7, %o0, %o0

atomic_impl_end: