Adds the vtbl ARM SIMD instruction.

runtime/vm/simulator_arm.cc

 // Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include <math.h>  // for isnan.
 #include <setjmp.h>
 #include <stdlib.h>
 
 #include "vm/globals.h"
 #if defined(TARGET_ARCH_ARM)
@@ skipping 2996 matching lines @@
       for (int i = 0; i < 4; i++) {
         s8d.data_[i].f = s8n.data_[i].f * s8m.data_[i].f;
       }
     } else {
       UnimplementedInstruction(instr);
     }
 
     set_qregister(qd, s8d);
   } else {
     // Q == 0, Uses 64-bit D registers.
-    UnimplementedInstruction(instr);
+    if ((instr->Bits(23, 2) == 3) && (instr->Bits(20, 2) == 3) &&
+        (instr->Bits(10, 2) == 2) && (instr->Bit(4) == 0)) {
+      // Format(instr, "vtbl 'dd, 'dtbllist, 'dm");
+      DRegister dd = instr->DdField();
+      DRegister dm = instr->DmField();
+      int reg_count = instr->Bits(8, 2) + 1;
+      int start = (instr->Bit(7) << 4) | instr->Bits(16, 4);
+      int64_t table[4];
+
+      for (int i = 0; i < reg_count; i++) {
+        DRegister d = static_cast<DRegister>(start + i);
+        table[i] = get_dregister_bits(d);
+      }
+      for (int i = reg_count; i < 4; i++) {
+        table[i] = 0;
+      }
+
+
+      int64_t dm_value = get_dregister_bits(dm);
+      int64_t result;
+      int8_t* dm_bytes = reinterpret_cast<int8_t*>(&dm_value);
+      int8_t* result_bytes = reinterpret_cast<int8_t*>(&result);
+      int8_t* table_bytes = reinterpret_cast<int8_t*>(&table[0]);
+      for (int i = 0; i < 8; i++) {
+        int idx = dm_bytes[i];
+        if ((idx >= 0) && (idx < 256)) {
+          result_bytes[i] = table_bytes[idx];
+        } else {
+          result_bytes[i] = 0;
+        }
+      }
+
+      set_dregister_bits(dd, result);
+    } else {
+      UnimplementedInstruction(instr);
+    }
   }
 }
 
 
 // Executes the current instruction.
 void Simulator::InstructionDecode(Instr* instr) {
   pc_modified_ = false;
   if (FLAG_trace_sim) {
     const uword start = reinterpret_cast<uword>(instr);
     const uword end = start + Instr::kInstrSize;
@@ skipping 225 matching lines @@
   set_register(kExceptionObjectReg, bit_cast<int32_t>(raw_exception));
   set_register(kStackTraceObjectReg, bit_cast<int32_t>(raw_stacktrace));
   buf->Longjmp();
 }
 
 }  // namespace dart
 
 #endif  // !defined(HOST_ARCH_ARM)
 
 #endif  // defined TARGET_ARCH_ARM