File: [Development] / linux-2.6-xfs / arch / sparc64 / lib / atomic.S (download)
Revision 1.3, Fri Oct 1 15:10:15 2004 UTC (13 years, 1 month ago) by nathans.longdrop.melbourne.sgi.com
Branch: MAIN
Changes since 1.2: +8 -1
lines
Upgrade kernel to 2.6.9-rc3 and kdb to 4.4
Merge of 2.6.x-xfs-melb:linux:19628a by kenmcd.
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/* $Id: atomic.S,v 1.4 2001/11/18 00:12:56 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_add
.type __atomic_add,#function
__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
.size __atomic_add, .-__atomic_add
.globl __atomic_sub
.type __atomic_sub,#function
__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
.size __atomic_sub, .-__atomic_sub
.globl __atomic64_add
.type __atomic64_add,#function
__atomic64_add: /* %o0 = increment, %o1 = atomic_ptr */
ldx [%o1], %g5
add %g5, %o0, %g7
casx [%o1], %g5, %g7
cmp %g5, %g7
bne,pn %xcc, __atomic64_add
membar #StoreLoad | #StoreStore
retl
add %g7, %o0, %o0
.size __atomic64_add, .-__atomic64_add
.globl __atomic64_sub
.type __atomic64_sub,#function
__atomic64_sub: /* %o0 = increment, %o1 = atomic_ptr */
ldx [%o1], %g5
sub %g5, %o0, %g7
casx [%o1], %g5, %g7
cmp %g5, %g7
bne,pn %xcc, __atomic64_sub
membar #StoreLoad | #StoreStore
retl
sub %g7, %o0, %o0
.size __atomic64_sub, .-__atomic64_sub