MIPS: [Atomics] Remove Atomics code stubs; use TF ops.

src/mips64/disasm-mips64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // A Disassembler object is used to disassemble a block of code instruction by
 // instruction. The default implementation of the NameConverter object can be
 // overriden to modify register names or to do symbol lookup on addresses.
 //
 // The example below will disassemble a block of code and print it to stdout.
 //
@@ skipping 1369 matching lines @@
       break;
     case TLTU:
       Format(instr, "tltu    'rs, 'rt, code: 'code");
       break;
     case TEQ:
       Format(instr, "teq     'rs, 'rt, code: 'code");
       break;
     case TNE:
       Format(instr, "tne     'rs, 'rt, code: 'code");
       break;
+    case SYNC:
+      Format(instr, "sync");
+      break;
     case MOVZ:
       Format(instr, "movz    'rd, 'rs, 'rt");
       break;
     case MOVN:
       Format(instr, "movn    'rd, 'rs, 'rt");
       break;
     case MOVCI:
       if (instr->Bit(16)) {
         Format(instr, "movt    'rd, 'rs, 'bc");
       } else {
@@ skipping 602 matching lines @@
         prev_pc, *reinterpret_cast<int32_t*>(prev_pc), buffer.start());
   }
 }
 
 
 #undef UNSUPPORTED
 
 }  // namespace disasm
 
 #endif  // V8_TARGET_ARCH_MIPS64