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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 <asm/asi.h>

        .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: