Adds mrc instruction to arm simulator, assembler, disassembler.

runtime/vm/assembler_macros_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_macros.h"
 
 #include "vm/assembler.h"
@@ skipping 52 matching lines @@
   __ EnterFrame((1 << FP) | (1 << IP) | (1 << LR), 0);
 }
 
 
 void AssemblerMacros::LeaveStubFrame(Assembler* assembler) {
   __ LeaveFrame((1 << FP) | (1 << LR));
   // Adjust SP for null PC pushed in EnterStubFrame.
   __ AddImmediate(SP, kWordSize);
 }
 
+
+void AssemblerMacros::HasDiv(Assembler* assembler, Register rd) {
+  __ mrc(rd, 15, 0, 0, 2, 0);
+  __ Lsr(rd, rd, 24);
+  __ and_(rd, rd, ShifterOperand(0xf));
+}
+
+

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

Move code to CPUFeatures::InitOnce().

 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM