Reduce instruction size on X64.

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 2537 matching lines @@
   } else {
     EmitUint8(0x0F);
     EmitUint8(0x80 + condition);
     EmitLabelLink(label);
   }
 }
 
 
 void Assembler::j(Condition condition, const ExternalLabel* label) {
   Label no_jump;
-  j(static_cast<Condition>(condition ^ 1), &no_jump);  // Negate condition.
+  // Negate condition.
+  j(static_cast<Condition>(condition ^ 1), &no_jump, Assembler::kNearJump);
   jmp(label);
   Bind(&no_jump);
 }
 
 
 void Assembler::J(Condition condition, const ExternalLabel* label,
                   Register pp) {
   Label no_jump;
-  j(static_cast<Condition>(condition ^ 1), &no_jump);  // Negate condition.
+  // Negate condition.
+  j(static_cast<Condition>(condition ^ 1), &no_jump, Assembler::kNearJump);
   Jmp(label, pp);
   Bind(&no_jump);
 }
 
 
 void Assembler::jmp(Register reg) {
   AssemblerBuffer::EnsureCapacity ensured(&buffer_);
   Operand operand(reg);
   EmitOperandREX(4, operand, REX_NONE);
   EmitUint8(0xFF);
@@ skipping 1339 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