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/* $Id: atomic.S,v 1.3 2000/03/16 16:44:37 davem 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
nop
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
nop
retl
sub %g7, %o0, %o0
atomic_impl_end:
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