Adds mrc instruction to arm simulator, assembler, disassembler.

runtime/vm/assembler_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 "vm/globals.h"
 #if defined(TARGET_ARCH_ARM)
 
 #include "vm/assembler.h"
 
 #include "vm/stub_code.h"
@@ skipping 1098 matching lines @@
 void Assembler::blx(Register rm, Condition cond) {
   ASSERT(rm != kNoRegister);
   ASSERT(cond != kNoCondition);
   int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
                      B24 | B21 | (0xfff << 8) | B5 | B4 |
                      (static_cast<int32_t>(rm) << kRmShift);
   Emit(encoding);
 }
 
 
+void Assembler::mrc(Register rd, int32_t coproc, int32_t opc1,
+                    int32_t CRn, int32_t CRm, int32_t opc2, Condition cond) {

[regis, 2013/03/04 21:54:52]

crn, crm

+  ASSERT(rd != kNoRegister);
+  ASSERT(cond != kNoCondition);
+
+  // This is all the simulator and disassembler know about.
+  ASSERT(coproc == 15);
+  ASSERT(opc1 == 0);
+  ASSERT(CRn == 0);
+  ASSERT(CRm == 2);
+  ASSERT(opc2 == 0);
+  int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
+                     B27 | B26 | B25 | B20 | B4 |
+                     ((opc1 & 0x7) << kOpc1Shift) |
+                     ((CRn & 0xf) << kCRnShift) |
+                     ((coproc & 0xf) << kCoprocShift) |
+                     ((opc2 & 0x7) << kOpc2Shift) |
+                     ((CRm & 0xf) << kCRmShift) |
+                     (static_cast<int32_t>(rd) << kRdShift);
+  Emit(encoding);
+}
+
+
 void Assembler::MarkExceptionHandler(Label* label) {
   EmitType01(AL, 1, TST, 1, PC, R0, ShifterOperand(0));
   Label l;
   b(&l);
   EmitBranch(AL, label, false);
   Bind(&l);
 }
 
 
 void Assembler::LoadObject(Register rd, const Object& object) {
@@ skipping 604 matching lines @@
   // Do not reuse an existing entry, since each reference may be patched
   // independently.
   object_pool_.Add(smi);
   return object_pool_.Length() - 1;
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM