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* config/rs6000/rs6000.md (UNSPEC_SYNC, UNSPEC_LWSYNC,
UNSPEC_ISYNC, UNSPEC_SYNC_OP, UNSPEC_ATOMIC, UNSPEC_CMPXCHG,
UNSPEC_XCHG, UNSPEC_AND): New.
(UNSPECV_ATOMIC, UNSPECV_SYNC, UNSPECV_SYNC_OP, UNSPECV_CMPXCHG,
UNSPECV_LWSYNC, UNSPECV_ISYNC): Delete.
* config/rs6000/sync.md (FETCHOP): New code macro.
(fetchop_name, fetchop_pred, fetchopsi_constr, fetchopdi_constr):
New code attrs.
(memory_barrier, sync_internal): Use unspec instead of unspec_volatile.
(sync_compare_and_swap<mode>): Same.
(sync_lock_test_and_set<mode>): Same.
(sync_<fetchop><mode>, sync_nand<mode>): Only use rs6000_emit_sync
for QImode and HImode, and not PPC405.
(sync_old_<fetchop><mode>, sync_old_nand<mode>): Same.
(sync_new_<fetchop><mode>, sync_new_nand<mode>): Same.
(sync_<fetchop>{si,di}_internal): New.
(sync_nand{si,di}_internal): New.
(sync_old_<fetchop>{si,di}_internal): New.
(sync_old_nand{si,di}_internal): New
(sync_new_<fetchop>{si,di}_internal): New.
(sync_new_nand{si,di}_internal): New.
(atomic_and{si,di}): New.
(sync_new_nand{si,di}_internal): New.
(atomic_and{si,di}): New.
(sync_add<mode>_internal): Delete.
(sync_addshort_internal): Use unspec instead of unspec_volatile.
(sync_sub<mode>_internal): Delte.
(sync_subshort_internal): New.
(sync_andsi_internal): Use unspec instead of unspec_volatile.
(sync_anddi_internal): Delete.
(sync_boolsi_internal): Use unspec instead of unspec_volatile.
(sync_booldi_internal): Delete.
(sync_boolc<mode>_internal): Delete.
(sync_boolcshort_internal): Use unspec instead of unspec_volatile.
(sync_boolc<mode>_internal2): Delete.
(sync_boolcc<mode>_internal): Delete.
(isync, lwsync): Use unspec instead of unspec_volatile.
* config/rs6000/rs6000.c (rs6000_emit_sync): Implement MINUS.
Revert UNSPEC_VOLATILE.
(rs6000_split_atomic_op): New.
* config/rs6000/rs6000-protos.h (rs6000_split_atomic_op): Declare.
From-SVN: r102049
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