Adds arm64 double arithmetic instructions.

runtime/vm/assembler_arm64.cc

 // Copyright (c) 2014, 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_ARM64)
 
 #include "vm/assembler.h"
 #include "vm/cpu.h"
 #include "vm/longjump.h"
@@ skipping 901 matching lines @@
   }
 }
 
 
 // On entry to a function compiled for OSR, the caller's frame pointer, the
 // stack locals, and any copied parameters are already in place.  The frame
 // pointer is already set up.  The PC marker is not correct for the
 // optimized function and there may be extra space for spill slots to
 // allocate. We must also set up the pool pointer for the function.
 void Assembler::EnterOsrFrame(intptr_t extra_size, Register new_pp) {
-  const intptr_t offset = CodeSize();
-
   Comment("EnterOsrFrame");
   adr(TMP, -CodeSize());
 
-  AddImmediate(TMP, TMP, -offset, kNoPP);
   StoreToOffset(TMP, FP, kPcMarkerSlotFromFp * kWordSize);
 
   // Setup pool pointer for this dart function.
   if (new_pp == kNoPP) {
     LoadPoolPointer(PP);
   } else {
     mov(PP, new_pp);
   }
 
   if (extra_size > 0) {
@@ skipping 218 matching lines @@
     LoadImmediate(TMP, tags, pp);
     StoreFieldToOffset(TMP, instance_reg, Object::tags_offset());
   } else {
     b(failure);
   }
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64