Add CLZ instruction to the ARM integrated assembler.

src/DartARM32/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.
 //
 // This is forked from Dart revision df52deea9f25690eb8b66c5995da92b70f7ac1fe
 // Please update the (git) revision if we merge changes from Dart.
 // https://code.google.com/p/dart/wiki/GettingTheSource
 
 #include "vm/globals.h"  // NOLINT
 #if defined(TARGET_ARCH_ARM)
@@ skipping 299 matching lines @@
 
 // Moved to ARM32::AssemblerARM32::mvn()
 void Assembler::mvn(Register rd, Operand o, Condition cond) {
   EmitType01(cond, o.type(), MVN, 0, R0, rd, o);
 }
 
 // Moved to ARM32::AssemblerARM32::mvn()
 void Assembler::mvns(Register rd, Operand o, Condition cond) {
   EmitType01(cond, o.type(), MVN, 1, R0, rd, o);
 }
-#endif
 
+// Moved to ARM32::AssemblerARM32::clz()
 void Assembler::clz(Register rd, Register rm, Condition cond) {
   ASSERT(rd != kNoRegister);
   ASSERT(rm != kNoRegister);
   ASSERT(cond != kNoCondition);
   ASSERT(rd != PC);
   ASSERT(rm != PC);
   int32_t encoding = (static_cast<int32_t>(cond) << kConditionShift) |
                      B24 | B22 | B21 | (0xf << 16) |
                      (static_cast<int32_t>(rd) << kRdShift) |
                      (0xf << 8) | B4 | static_cast<int32_t>(rm);
   Emit(encoding);
 }
 
-
-#if 0
 // Moved to ARM32::AssemblerARM32::movw()
 void Assembler::movw(Register rd, uint16_t imm16, Condition cond) {
   ASSERT(cond != kNoCondition);
   int32_t encoding = static_cast<int32_t>(cond) << kConditionShift |
                      B25 | B24 | ((imm16 >> 12) << 16) |
                      static_cast<int32_t>(rd) << kRdShift | (imm16 & 0xfff);
   Emit(encoding);
 }
 
 
@@ skipping 3340 matching lines @@
 
 
 const char* Assembler::FpuRegisterName(FpuRegister reg) {
   ASSERT((0 <= reg) && (reg < kNumberOfFpuRegisters));
   return fpu_reg_names[reg];
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM