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diff --git a/gcc/config/rs6000/sync.md b/gcc/config/rs6000/sync.md
new file mode 100644
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+++ b/gcc/config/rs6000/sync.md
@@ -0,0 +1,622 @@
+;; Machine description for PowerPC synchronization instructions.
+;; Copyright (C) 2005, 2007, 2008, 2009 Free Software Foundation, Inc.
+;; Contributed by Geoffrey Keating.
+
+;; This file is part of GCC.
+
+;; GCC is free software; you can redistribute it and/or modify it
+;; under the terms of the GNU General Public License as published
+;; by the Free Software Foundation; either version 3, or (at your
+;; option) any later version.
+
+;; GCC is distributed in the hope that it will be useful, but WITHOUT
+;; ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+;; or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
+;; License for more details.
+
+;; You should have received a copy of the GNU General Public License
+;; along with GCC; see the file COPYING3.  If not see
+;; <http://www.gnu.org/licenses/>.
+
+(define_mode_attr larx [(SI "lwarx") (DI "ldarx")])
+(define_mode_attr stcx [(SI "stwcx.") (DI "stdcx.")])
+
+(define_code_iterator FETCHOP [plus minus ior xor and])
+(define_code_attr fetchop_name
+  [(plus "add") (minus "sub") (ior "ior") (xor "xor") (and "and")])
+(define_code_attr fetchop_pred
+  [(plus "add_operand") (minus "gpc_reg_operand")
+   (ior "logical_operand") (xor "logical_operand") (and "and_operand")])
+(define_code_attr fetchopsi_constr
+  [(plus "rIL") (minus "r") (ior "rKL") (xor "rKL") (and "rTKL")])
+(define_code_attr fetchopdi_constr
+  [(plus "rIL") (minus "r") (ior "rKJF") (xor "rKJF") (and "rSTKJ")])
+
+(define_expand "memory_barrier"
+  [(set (match_dup 0)
+	(unspec:BLK [(match_dup 0)] UNSPEC_SYNC))]
+  ""
+{
+  operands[0] = gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (Pmode));
+  MEM_VOLATILE_P (operands[0]) = 1;
+})
+
+(define_insn "*sync_internal"
+  [(set (match_operand:BLK 0 "" "")
+	(unspec:BLK [(match_dup 0)] UNSPEC_SYNC))]
+  ""
+  "{dcs|sync}"
+  [(set_attr "type" "sync")])
+
+(define_insn "load_locked_<mode>"
+  [(set (match_operand:GPR 0 "gpc_reg_operand" "=r")
+	(unspec_volatile:GPR
+	  [(match_operand:GPR 1 "memory_operand" "Z")] UNSPECV_LL))]
+  "TARGET_POWERPC"
+  "<larx> %0,%y1"
+  [(set_attr "type" "load_l")])
+
+(define_insn "store_conditional_<mode>"
+  [(set (match_operand:CC 0 "cc_reg_operand" "=x")
+	(unspec_volatile:CC [(const_int 0)] UNSPECV_SC))
+   (set (match_operand:GPR 1 "memory_operand" "=Z")
+	(match_operand:GPR 2 "gpc_reg_operand" "r"))]
+  "TARGET_POWERPC"
+  "<stcx> %2,%y1"
+  [(set_attr "type" "store_c")])
+
+(define_insn_and_split "sync_compare_and_swap<mode>"
+  [(set (match_operand:GPR 0 "gpc_reg_operand" "=&r")
+	(match_operand:GPR 1 "memory_operand" "+Z"))
+   (set (match_dup 1)
+	(unspec:GPR
+	  [(match_operand:GPR 2 "reg_or_short_operand" "rI")
+	   (match_operand:GPR 3 "gpc_reg_operand" "r")]
+	  UNSPEC_CMPXCHG))
+   (clobber (match_scratch:GPR 4 "=&r"))
+   (clobber (match_scratch:CC 5 "=&x"))]
+  "TARGET_POWERPC"
+  "#"
+  "&& reload_completed"
+  [(const_int 0)]
+{
+  rs6000_split_compare_and_swap (operands[0], operands[1], operands[2],
+				 operands[3], operands[4]);
+  DONE;
+})
+
+(define_expand "sync_compare_and_swaphi"
+  [(match_operand:HI 0 "gpc_reg_operand" "")
+   (match_operand:HI 1 "memory_operand" "")
+   (match_operand:HI 2 "gpc_reg_operand" "")
+   (match_operand:HI 3 "gpc_reg_operand" "")]
+  "TARGET_POWERPC"
+{
+  rs6000_expand_compare_and_swapqhi (operands[0], operands[1],
+				     operands[2], operands[3]);
+  DONE;
+})
+
+(define_expand "sync_compare_and_swapqi"
+  [(match_operand:QI 0 "gpc_reg_operand" "")
+   (match_operand:QI 1 "memory_operand" "")
+   (match_operand:QI 2 "gpc_reg_operand" "")
+   (match_operand:QI 3 "gpc_reg_operand" "")]
+  "TARGET_POWERPC"
+{
+  rs6000_expand_compare_and_swapqhi (operands[0], operands[1],
+				     operands[2], operands[3]);
+  DONE;
+})
+
+(define_insn_and_split "sync_compare_and_swapqhi_internal"
+  [(set (match_operand:SI 0 "gpc_reg_operand" "=&r")
+	(match_operand:SI 4 "memory_operand" "+Z"))
+   (set (match_dup 4)
+        (unspec:SI
+          [(match_operand:SI 1 "gpc_reg_operand" "r")
+           (match_operand:SI 2 "gpc_reg_operand" "r")
+           (match_operand:SI 3 "gpc_reg_operand" "r")]
+          UNSPEC_CMPXCHG))
+   (clobber (match_scratch:SI 5 "=&r"))
+   (clobber (match_scratch:CC 6 "=&x"))]
+  "TARGET_POWERPC"
+  "#"
+  "&& reload_completed"
+  [(const_int 0)]
+{
+  rs6000_split_compare_and_swapqhi (operands[0], operands[1],
+				    operands[2], operands[3], operands[4],
+				    operands[5]);
+  DONE;
+})
+
+(define_insn_and_split "sync_lock_test_and_set<mode>"
+  [(set (match_operand:GPR 0 "gpc_reg_operand" "=&r")
+	(match_operand:GPR 1 "memory_operand" "+Z"))
+   (set (match_dup 1)
+	(unspec:GPR
+	  [(match_operand:GPR 2 "reg_or_short_operand" "rL")]
+	  UNSPEC_XCHG))
+   (clobber (match_scratch:GPR 3 "=&r"))
+   (clobber (match_scratch:CC 4 "=&x"))]
+  "TARGET_POWERPC"
+  "#"
+  "&& reload_completed"
+  [(const_int 0)]
+{
+  rs6000_split_lock_test_and_set (operands[0], operands[1], operands[2],
+				  operands[3]);
+  DONE;
+})
+
+(define_expand "sync_<fetchop_name><mode>"
+  [(parallel [(set (match_operand:INT1 0 "memory_operand" "")
+		   (unspec:INT1
+		     [(FETCHOP:INT1 (match_dup 0)
+			(match_operand:INT1 1 "<fetchop_pred>" ""))]
+		     UNSPEC_ATOMIC))
+	      (clobber (scratch:INT1))
+	      (clobber (scratch:CC))])]
+  "TARGET_POWERPC"
+  "
+{
+  if (<MODE>mode != SImode && <MODE>mode != DImode)
+    {
+      if (PPC405_ERRATUM77)
+	FAIL;
+      rs6000_emit_sync (<CODE>, <MODE>mode, operands[0], operands[1],
+			NULL_RTX, NULL_RTX, true);
+      DONE;
+    }
+}")
+
+(define_insn_and_split "*sync_<fetchop_name>si_internal"
+  [(set (match_operand:SI 0 "memory_operand" "+Z")
+	(unspec:SI
+	  [(FETCHOP:SI (match_dup 0)
+	     (match_operand:SI 1 "<fetchop_pred>" "<fetchopsi_constr>"))]
+	  UNSPEC_ATOMIC))
+   (clobber (match_scratch:SI 2 "=&b"))
+   (clobber (match_scratch:CC 3 "=&x"))]
+  "TARGET_POWERPC"
+  "#"
+  "&& reload_completed"
+  [(const_int 0)]
+{
+  rs6000_split_atomic_op (<CODE>, operands[0], operands[1],
+			  NULL_RTX, NULL_RTX, operands[2]);
+  DONE;
+})
+
+(define_insn_and_split "*sync_<fetchop_name>di_internal"
+  [(set (match_operand:DI 0 "memory_operand" "+Z")
+	(unspec:DI
+	  [(FETCHOP:DI (match_dup 0)
+	     (match_operand:DI 1 "<fetchop_pred>" "<fetchopdi_constr>"))]
+	  UNSPEC_ATOMIC))
+   (clobber (match_scratch:DI 2 "=&b"))
+   (clobber (match_scratch:CC 3 "=&x"))]
+  "TARGET_POWERPC"
+  "#"
+  "&& reload_completed"
+  [(const_int 0)]
+{
+  rs6000_split_atomic_op (<CODE>, operands[0], operands[1],
+			  NULL_RTX, NULL_RTX, operands[2]);
+  DONE;
+})
+
+(define_expand "sync_nand<mode>"
+  [(parallel [(set (match_operand:INT1 0 "memory_operand" "")
+	      (unspec:INT1
+		[(ior:INT1 (not:INT1 (match_dup 0))
+			   (not:INT1 (match_operand:INT1 1 "gpc_reg_operand" "")))]
+		UNSPEC_ATOMIC))
+	      (clobber (scratch:INT1))
+	      (clobber (scratch:CC))])]
+  "TARGET_POWERPC"
+  "
+{
+  if (<MODE>mode != SImode && <MODE>mode != DImode)
+    {
+      FAIL;
+      if (PPC405_ERRATUM77)
+	FAIL;
+      rs6000_emit_sync (NOT, <MODE>mode, operands[0], operands[1],
+			NULL_RTX, NULL_RTX, true);
+      DONE;
+    }
+}")
+
+(define_insn_and_split "*sync_nand<mode>_internal"
+  [(set (match_operand:GPR 0 "memory_operand" "+Z")
+	(unspec:GPR
+	  [(ior:GPR (not:GPR (match_dup 0))
+		    (not:GPR (match_operand:GPR 1 "gpc_reg_operand" "r")))]
+	  UNSPEC_ATOMIC))
+   (clobber (match_scratch:GPR 2 "=&r"))
+   (clobber (match_scratch:CC 3 "=&x"))]
+  "TARGET_POWERPC"
+  "#"
+  "&& reload_completed"
+  [(const_int 0)]
+{
+  rs6000_split_atomic_op (NOT, operands[0], operands[1],
+			  NULL_RTX, NULL_RTX, operands[2]);
+  DONE;
+})
+
+(define_expand "sync_old_<fetchop_name><mode>"
+  [(parallel [(set (match_operand:INT1 0 "gpc_reg_operand" "")
+		   (match_operand:INT1 1 "memory_operand" ""))
+	      (set (match_dup 1)
+		   (unspec:INT1
+		     [(FETCHOP:INT1 (match_dup 1)
+			(match_operand:INT1 2 "<fetchop_pred>" ""))]
+		     UNSPEC_ATOMIC))
+	      (clobber (scratch:INT1))
+	      (clobber (scratch:CC))])]
+  "TARGET_POWERPC"
+  "
+{ 
+  if (<MODE>mode != SImode && <MODE>mode != DImode)
+    {
+      if (PPC405_ERRATUM77)
+	FAIL;
+      rs6000_emit_sync (<CODE>, <MODE>mode, operands[1], operands[2],
+			operands[0], NULL_RTX, true);
+      DONE;
+    }
+}")
+
+(define_insn_and_split "*sync_old_<fetchop_name>si_internal"
+  [(set (match_operand:SI 0 "gpc_reg_operand" "=&r")
+	(match_operand:SI 1 "memory_operand" "+Z"))
+   (set (match_dup 1)
+	(unspec:SI
+	  [(FETCHOP:SI (match_dup 1)
+	     (match_operand:SI 2 "<fetchop_pred>" "<fetchopsi_constr>"))]
+	  UNSPEC_ATOMIC))
+   (clobber (match_scratch:SI 3 "=&b"))
+   (clobber (match_scratch:CC 4 "=&x"))]
+  "TARGET_POWERPC"
+  "#"
+  "&& reload_completed"
+  [(const_int 0)]
+{
+  rs6000_split_atomic_op (<CODE>, operands[1], operands[2],
+			  operands[0], NULL_RTX, operands[3]);
+  DONE;
+})
+
+(define_insn_and_split "*sync_old_<fetchop_name>di_internal"
+  [(set (match_operand:DI 0 "gpc_reg_operand" "=&r")
+	(match_operand:DI 1 "memory_operand" "+Z"))
+   (set (match_dup 1)
+	(unspec:DI
+	  [(FETCHOP:DI (match_dup 1)
+	     (match_operand:DI 2 "<fetchop_pred>" "<fetchopdi_constr>"))]
+	  UNSPEC_ATOMIC))
+   (clobber (match_scratch:DI 3 "=&b"))
+   (clobber (match_scratch:CC 4 "=&x"))]
+  "TARGET_POWERPC"
+  "#"
+  "&& reload_completed"
+  [(const_int 0)]
+{
+  rs6000_split_atomic_op (<CODE>, operands[1], operands[2],
+			  operands[0], NULL_RTX, operands[3]);
+  DONE;
+})
+
+(define_expand "sync_old_nand<mode>"
+  [(parallel [(set (match_operand:INT1 0 "gpc_reg_operand" "")
+		   (match_operand:INT1 1 "memory_operand" ""))
+	      (set (match_dup 1)
+		   (unspec:INT1
+		     [(ior:INT1 (not:INT1 (match_dup 1))
+				(not:INT1 (match_operand:INT1 2 "gpc_reg_operand" "")))]
+		     UNSPEC_ATOMIC))
+	      (clobber (scratch:INT1))
+	      (clobber (scratch:CC))])]
+  "TARGET_POWERPC"
+  "
+{
+  if (<MODE>mode != SImode && <MODE>mode != DImode)
+    {
+      FAIL;
+      if (PPC405_ERRATUM77)
+	FAIL;
+      rs6000_emit_sync (NOT, <MODE>mode, operands[1], operands[2],
+			operands[0], NULL_RTX, true);
+      DONE;
+    }
+}")
+
+(define_insn_and_split "*sync_old_nand<mode>_internal"
+  [(set (match_operand:GPR 0 "gpc_reg_operand" "=&r")
+	(match_operand:GPR 1 "memory_operand" "+Z"))
+   (set (match_dup 1)
+	(unspec:GPR
+	  [(ior:GPR (not:GPR (match_dup 1))
+		    (not:GPR (match_operand:GPR 2 "gpc_reg_operand" "r")))]
+	  UNSPEC_ATOMIC))
+   (clobber (match_scratch:GPR 3 "=&r"))
+   (clobber (match_scratch:CC 4 "=&x"))]
+  "TARGET_POWERPC"
+  "#"
+  "&& reload_completed"
+  [(const_int 0)]
+{
+  rs6000_split_atomic_op (NOT, operands[1], operands[2],
+			  operands[0], NULL_RTX, operands[3]);
+  DONE;
+})
+
+(define_expand "sync_new_<fetchop_name><mode>"
+  [(parallel [(set (match_operand:INT1 0 "gpc_reg_operand" "")
+		   (FETCHOP:INT1
+		     (match_operand:INT1 1 "memory_operand" "")
+		     (match_operand:INT1 2 "<fetchop_pred>" "")))
+	      (set (match_dup 1)
+		   (unspec:INT1
+		     [(FETCHOP:INT1 (match_dup 1) (match_dup 2))]
+		     UNSPEC_ATOMIC))
+	      (clobber (scratch:INT1))
+	      (clobber (scratch:CC))])]
+  "TARGET_POWERPC"
+  "
+{
+  if (<MODE>mode != SImode && <MODE>mode != DImode)
+    {
+      if (PPC405_ERRATUM77)
+	FAIL;
+      rs6000_emit_sync (<CODE>, <MODE>mode, operands[1], operands[2],
+			NULL_RTX, operands[0], true);
+      DONE;
+    }
+}")
+
+(define_insn_and_split "*sync_new_<fetchop_name>si_internal"
+  [(set (match_operand:SI 0 "gpc_reg_operand" "=&r")
+	(FETCHOP:SI
+	  (match_operand:SI 1 "memory_operand" "+Z")
+	  (match_operand:SI 2 "<fetchop_pred>" "<fetchopsi_constr>")))
+   (set (match_dup 1)
+	(unspec:SI
+	  [(FETCHOP:SI (match_dup 1) (match_dup 2))]
+	  UNSPEC_ATOMIC))
+   (clobber (match_scratch:SI 3 "=&b"))
+   (clobber (match_scratch:CC 4 "=&x"))]
+  "TARGET_POWERPC"
+  "#"
+  "&& reload_completed"
+  [(const_int 0)]
+{
+  rs6000_split_atomic_op (<CODE>, operands[1], operands[2],
+			  NULL_RTX, operands[0], operands[3]);
+  DONE;
+})
+
+(define_insn_and_split "*sync_new_<fetchop_name>di_internal"
+  [(set (match_operand:DI 0 "gpc_reg_operand" "=&r")
+	(FETCHOP:DI
+	  (match_operand:DI 1 "memory_operand" "+Z")
+	  (match_operand:DI 2 "<fetchop_pred>" "<fetchopdi_constr>")))
+   (set (match_dup 1)
+	(unspec:DI
+	  [(FETCHOP:DI (match_dup 1) (match_dup 2))]
+	  UNSPEC_ATOMIC))
+   (clobber (match_scratch:DI 3 "=&b"))
+   (clobber (match_scratch:CC 4 "=&x"))]
+  "TARGET_POWERPC"
+  "#"
+  "&& reload_completed"
+  [(const_int 0)]
+{
+  rs6000_split_atomic_op (<CODE>, operands[1], operands[2],
+			  NULL_RTX, operands[0], operands[3]);
+  DONE;
+})
+
+(define_expand "sync_new_nand<mode>"
+  [(parallel [(set (match_operand:INT1 0 "gpc_reg_operand" "")
+		   (ior:INT1
+		     (not:INT1 (match_operand:INT1 1 "memory_operand" ""))
+		     (not:INT1 (match_operand:INT1 2 "gpc_reg_operand" ""))))
+	      (set (match_dup 1)
+		   (unspec:INT1
+		     [(ior:INT1 (not:INT1 (match_dup 1))
+				(not:INT1 (match_dup 2)))]
+		     UNSPEC_ATOMIC))
+	      (clobber (scratch:INT1))
+	      (clobber (scratch:CC))])]
+  "TARGET_POWERPC"
+  "
+{
+  if (<MODE>mode != SImode && <MODE>mode != DImode)
+    {
+      FAIL;
+      if (PPC405_ERRATUM77)
+	FAIL;
+      rs6000_emit_sync (NOT, <MODE>mode, operands[1], operands[2],
+			NULL_RTX, operands[0], true);
+      DONE;
+    }
+}")
+
+(define_insn_and_split "*sync_new_nand<mode>_internal"
+  [(set (match_operand:GPR 0 "gpc_reg_operand" "=&r")
+	(ior:GPR
+	  (not:GPR (match_operand:GPR 1 "memory_operand" "+Z"))
+	  (not:GPR (match_operand:GPR 2 "gpc_reg_operand" "r"))))
+   (set (match_dup 1)
+	(unspec:GPR
+	  [(ior:GPR (not:GPR (match_dup 1)) (not:GPR (match_dup 2)))]
+	  UNSPEC_ATOMIC))
+   (clobber (match_scratch:GPR 3 "=&r"))
+   (clobber (match_scratch:CC 4 "=&x"))]
+  "TARGET_POWERPC"
+  "#"
+  "&& reload_completed"
+  [(const_int 0)]
+{
+  rs6000_split_atomic_op (NOT, operands[1], operands[2],
+			  NULL_RTX, operands[0], operands[3]);
+  DONE;
+})
+
+; and<mode> without cr0 clobber to avoid generation of additional clobber 
+; in atomic splitters causing internal consistency failure.
+; cr0 already clobbered by larx/stcx.
+(define_insn "*atomic_andsi"
+  [(set (match_operand:SI 0 "gpc_reg_operand" "=r,r,r,r")
+	(unspec:SI [(match_operand:SI 1 "gpc_reg_operand" "%r,r,r,r")
+		    (match_operand:SI 2 "and_operand" "?r,T,K,L")]
+		    UNSPEC_AND))]
+  ""
+  "@
+   and %0,%1,%2
+   {rlinm|rlwinm} %0,%1,0,%m2,%M2
+   {andil.|andi.} %0,%1,%b2
+   {andiu.|andis.} %0,%1,%u2"
+  [(set_attr "type" "*,*,compare,compare")])
+
+(define_insn "*atomic_anddi"
+  [(set (match_operand:DI 0 "gpc_reg_operand" "=r,r,r,r,r")
+	(unspec:DI [(match_operand:DI 1 "gpc_reg_operand" "%r,r,r,r,r")
+		    (match_operand:DI 2 "and_operand" "?r,S,T,K,J")]
+		    UNSPEC_AND))]
+  "TARGET_POWERPC64"
+  "@
+   and %0,%1,%2
+   rldic%B2 %0,%1,0,%S2
+   rlwinm %0,%1,0,%m2,%M2
+   andi. %0,%1,%b2
+   andis. %0,%1,%u2"
+  [(set_attr "type" "*,*,*,compare,compare")
+   (set_attr "length" "4,4,4,4,4")])
+
+; the sync_*_internal patterns all have these operands:
+; 0 - memory location
+; 1 - operand
+; 2 - value in memory after operation
+; 3 - value in memory immediately before operation
+
+(define_insn "*sync_addshort_internal"
+  [(set (match_operand:SI 2 "gpc_reg_operand" "=&r")
+	(ior:SI (and:SI (plus:SI (match_operand:SI 0 "memory_operand" "+Z")
+				 (match_operand:SI 1 "add_operand" "rI"))
+			(match_operand:SI 4 "gpc_reg_operand" "r"))
+		(and:SI (not:SI (match_dup 4)) (match_dup 0))))
+   (set (match_operand:SI 3 "gpc_reg_operand" "=&b") (match_dup 0))
+   (set (match_dup 0)
+	(unspec:SI [(ior:SI (and:SI (plus:SI (match_dup 0) (match_dup 1))
+				    (match_dup 4))
+			    (and:SI (not:SI (match_dup 4)) (match_dup 0)))]
+		   UNSPEC_SYNC_OP))
+   (clobber (match_scratch:CC 5 "=&x"))
+   (clobber (match_scratch:SI 6 "=&r"))]
+  "TARGET_POWERPC && !PPC405_ERRATUM77"
+  "lwarx %3,%y0\n\tadd%I1 %2,%3,%1\n\tandc %6,%3,%4\n\tand %2,%2,%4\n\tor %2,%2,%6\n\tstwcx. %2,%y0\n\tbne- $-24"
+  [(set_attr "length" "28")])
+
+(define_insn "*sync_subshort_internal"
+  [(set (match_operand:SI 2 "gpc_reg_operand" "=&r")
+	(ior:SI (and:SI (minus:SI (match_operand:SI 0 "memory_operand" "+Z")
+				  (match_operand:SI 1 "add_operand" "rI"))
+			(match_operand:SI 4 "gpc_reg_operand" "r"))
+		(and:SI (not:SI (match_dup 4)) (match_dup 0))))
+   (set (match_operand:SI 3 "gpc_reg_operand" "=&b") (match_dup 0))
+   (set (match_dup 0)
+	(unspec:SI [(ior:SI (and:SI (minus:SI (match_dup 0) (match_dup 1))
+				    (match_dup 4))
+			    (and:SI (not:SI (match_dup 4)) (match_dup 0)))]
+		   UNSPEC_SYNC_OP))
+   (clobber (match_scratch:CC 5 "=&x"))
+   (clobber (match_scratch:SI 6 "=&r"))]
+  "TARGET_POWERPC && !PPC405_ERRATUM77"
+  "lwarx %3,%y0\n\tsubf %2,%1,%3\n\tandc %6,%3,%4\n\tand %2,%2,%4\n\tor %2,%2,%6\n\tstwcx. %2,%y0\n\tbne- $-24"
+  [(set_attr "length" "28")])
+
+(define_insn "*sync_andsi_internal"
+  [(set (match_operand:SI 2 "gpc_reg_operand" "=&r,&r,&r,&r")
+	(and:SI (match_operand:SI 0 "memory_operand" "+Z,Z,Z,Z")
+		(match_operand:SI 1 "and_operand" "r,T,K,L")))
+   (set (match_operand:SI 3 "gpc_reg_operand" "=&b,&b,&b,&b") (match_dup 0))
+   (set (match_dup 0)
+	(unspec:SI [(and:SI (match_dup 0) (match_dup 1))]
+		   UNSPEC_SYNC_OP))
+   (clobber (match_scratch:CC 4 "=&x,&x,&x,&x"))]
+  "TARGET_POWERPC && !PPC405_ERRATUM77"
+  "@
+   lwarx %3,%y0\n\tand %2,%3,%1\n\tstwcx. %2,%y0\n\tbne- $-12
+   lwarx %3,%y0\n\trlwinm %2,%3,0,%m1,%M1\n\tstwcx. %2,%y0\n\tbne- $-12
+   lwarx %3,%y0\n\tandi. %2,%3,%b1\n\tstwcx. %2,%y0\n\tbne- $-12
+   lwarx %3,%y0\n\tandis. %2,%3,%u1\n\tstwcx. %2,%y0\n\tbne- $-12"
+  [(set_attr "length" "16,16,16,16")])
+
+(define_insn "*sync_boolsi_internal"
+  [(set (match_operand:SI 2 "gpc_reg_operand" "=&r,&r,&r")
+	(match_operator:SI 4 "boolean_or_operator"
+	 [(match_operand:SI 0 "memory_operand" "+Z,Z,Z")
+	  (match_operand:SI 1 "logical_operand" "r,K,L")]))
+   (set (match_operand:SI 3 "gpc_reg_operand" "=&b,&b,&b") (match_dup 0))
+   (set (match_dup 0) (unspec:SI [(match_dup 4)] UNSPEC_SYNC_OP))
+   (clobber (match_scratch:CC 5 "=&x,&x,&x"))]
+  "TARGET_POWERPC && !PPC405_ERRATUM77"
+  "@
+   lwarx %3,%y0\n\t%q4 %2,%3,%1\n\tstwcx. %2,%y0\n\tbne- $-12
+   lwarx %3,%y0\n\t%q4i %2,%3,%b1\n\tstwcx. %2,%y0\n\tbne- $-12
+   lwarx %3,%y0\n\t%q4is %2,%3,%u1\n\tstwcx. %2,%y0\n\tbne- $-12"
+  [(set_attr "length" "16,16,16")])
+
+; This pattern could also take immediate values of operand 1,
+; since the non-NOT version of the operator is used; but this is not
+; very useful, since in practice operand 1 is a full 32-bit value.
+; Likewise, operand 5 is in practice either <= 2^16 or it is a register.
+(define_insn "*sync_boolcshort_internal"
+  [(set (match_operand:SI 2 "gpc_reg_operand" "=&r")
+	(match_operator:SI 4 "boolean_or_operator"
+	 [(xor:SI (not:SI (match_operand:SI 0 "memory_operand" "+Z"))
+		  (not:SI (match_operand:SI 5 "logical_operand" "rK")))
+	 (match_operand:SI 1 "gpc_reg_operand" "r")]))
+   (set (match_operand:SI 3 "gpc_reg_operand" "=&b") (match_dup 0))
+   (set (match_dup 0) (unspec:SI [(match_dup 4)] UNSPEC_SYNC_OP))
+   (clobber (match_scratch:CC 6 "=&x"))]
+  "TARGET_POWERPC && !PPC405_ERRATUM77"
+  "lwarx %3,%y0\n\txor%I2 %2,%3,%5\n\t%q4 %2,%2,%1\n\tstwcx. %2,%y0\n\tbne- $-16"
+  [(set_attr "length" "20")])
+
+(define_insn "isync"
+  [(set (mem:BLK (match_scratch 0 "X"))
+	(unspec_volatile:BLK [(mem:BLK (match_scratch 1 "X"))] UNSPEC_ISYNC))]
+  ""
+  "{ics|isync}"
+  [(set_attr "type" "isync")])
+
+(define_expand "sync_lock_release<mode>"
+  [(set (match_operand:INT 0 "memory_operand")
+	(match_operand:INT 1 "any_operand"))]
+  ""
+  "
+{
+  emit_insn (gen_lwsync ());
+  emit_move_insn (operands[0], operands[1]);
+  DONE;
+}")
+
+; Some AIX assemblers don't accept lwsync, so we use a .long.
+(define_insn "lwsync"
+  [(set (mem:BLK (match_scratch 0 "X"))
+	(unspec_volatile:BLK [(mem:BLK (match_scratch 1 "X"))] UNSPEC_LWSYNC))]
+  ""
+{
+  if (TARGET_NO_LWSYNC)
+    return "sync";
+  else
+    return ".long 0x7c2004ac";
+}
+  [(set_attr "type" "sync")])
+