Adds far-branches to arm64.

runtime/vm/stub_code_arm64.cc

Index: runtime/vm/stub_code_arm64.cc
===================================================================
--- runtime/vm/stub_code_arm64.cc	(revision 36030)
+++ runtime/vm/stub_code_arm64.cc	(working copy)
@@ -748,11 +748,8 @@
   __ EnterFrame(0);
 
   // The new context, saved vm tag, the top exit frame, and the old context.
-  // const intptr_t kPreservedContextSlots = 4;
   const intptr_t kNewContextOffsetFromFp =
       -(1 + kAbiPreservedCpuRegCount + kAbiPreservedFpuRegCount) * kWordSize;
-  // const intptr_t kPreservedRegSpace =
-  //     kWordSize * (kAbiPreservedCpuRegCount + kPreservedContextSlots);
 
   // Save the callee-saved registers.
   for (int i = kAbiFirstPreservedCpuReg; i <= kAbiLastPreservedCpuReg; i++) {
@@ -876,7 +873,7 @@
   // Restore the bottom 64-bits of callee-saved V registers.
   for (int i = kAbiLastPreservedFpuReg; i >= kAbiFirstPreservedFpuReg; i--) {
     const VRegister r = static_cast<VRegister>(i);
-    __ PushDouble(r);
+    __ PopDouble(r);

[zra, 2014/05/12 15:12:06]

This wasn't causing failures before because I was putting the raw icount_ into
the preserved d-registers array in the simulator instead of casting icount_ to a
double first.

   }
 
   // Restore C++ ABI callee-saved registers.