A64: Make the simulator sampling friendly.

src/a64/constants-a64.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 689 matching lines @@
 
 enum MemBarrierOp {
   MemBarrierFixed = 0xD503309F,
   MemBarrierFMask = 0xFFFFF09F,
   MemBarrierMask  = 0xFFFFF0FF,
   DSB             = MemBarrierFixed | 0x00000000,
   DMB             = MemBarrierFixed | 0x00000020,
   ISB             = MemBarrierFixed | 0x00000040
 };
 
-// Any load or store.
+// Any load or store (including pair).
 enum LoadStoreAnyOp {
   LoadStoreAnyFMask = 0x0a000000,
   LoadStoreAnyFixed = 0x08000000
 };
 
+// Any load pair or store pair.
+enum LoadStorePairAnyOp {
+  LoadStorePairAnyFMask = 0x3a000000,
+  LoadStorePairAnyFixed = 0x28000000
+};
+
 #define LOAD_STORE_PAIR_OP_LIST(V)  \
   V(STP, w,   0x00000000),          \
   V(LDP, w,   0x00400000),          \
   V(LDPSW, x, 0x40400000),          \
   V(STP, x,   0x80000000),          \
   V(LDP, x,   0x80400000),          \
   V(STP, s,   0x04000000),          \
   V(LDP, s,   0x04400000),          \
   V(STP, d,   0x44000000),          \
   V(LDP, d,   0x44400000)
@@ skipping 521 matching lines @@
 };
 
 enum UnallocatedOp {
   UnallocatedFixed = 0x00000000,
   UnallocatedFMask = 0x00000000
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_A64_CONSTANTS_A64_H_