Make guard_cid and nullable_cid half words.

runtime/vm/assembler_x64.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"  // NOLINT
 #if defined(TARGET_ARCH_X64)
 
 #include "vm/assembler.h"
 #include "vm/cpu.h"
 #include "vm/heap.h"
@@ skipping 332 matching lines @@
 
 void Assembler::movw(const Address& dst, Register src) {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   EmitOperandSizeOverride();
   EmitOperandREX(src, dst, REX_NONE);
   EmitUint8(0x89);
   EmitOperand(src & 7, dst);
 }
 
 
+void Assembler::movw(const Address& dst, const Immediate& imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitOperandSizeOverride();
+  EmitUint8(0xC7);
+  EmitOperand(0, dst);
+  EmitUint8(imm.value() & 0xFF);
+  EmitUint8((imm.value() >> 8) & 0xFF);
+}
+
+
 void Assembler::movq(Register dst, const Immediate& imm) {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   if (imm.is_int32()) {
     Operand operand(dst);
     EmitOperandREX(0, operand, REX_W);
     EmitUint8(0xC7);
     EmitOperand(0, operand);
   } else {
     EmitRegisterREX(dst, REX_W);
     EmitUint8(0xB8 | (dst & 7));
@@ skipping 1049 matching lines @@
 void Assembler::cmpb(const Address& address, const Immediate& imm) {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   EmitOperandREX(7, address, REX_NONE);
   EmitUint8(0x80);
   EmitOperand(7, address);
   ASSERT(imm.is_int8());
   EmitUint8(imm.value() & 0xFF);
 }
 
 
+void Assembler::cmpw(Register reg, const Address& address) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitOperandSizeOverride();
+  EmitUint8(0x3B);
+  EmitOperand(reg, address);
+}
+
+
+void Assembler::cmpw(const Address& address, const Immediate& imm) {
+  AssemblerBuffer::EnsureCapacity ensured(&buffer_);
+  EmitOperandSizeOverride();
+  EmitUint8(0x81);
+  EmitOperand(7, address);
+  EmitUint8(imm.value() & 0xFF);
+  EmitUint8((imm.value() >> 8) & 0xFF);
+}
+
+
 void Assembler::cmpl(Register reg, const Immediate& imm) {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   EmitRegisterREX(reg, REX_NONE);
   EmitComplex(7, Operand(reg), imm);
 }
 
 
 void Assembler::cmpl(Register reg0, Register reg1) {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   Operand operand(reg1);
@@ skipping 2466 matching lines @@
 
 
 const char* Assembler::FpuRegisterName(FpuRegister reg) {
   ASSERT((0 <= reg) && (reg < kNumberOfXmmRegisters));
   return xmm_reg_names[reg];
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_X64