Begins work on arm64 floating point 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 548 matching lines @@
       if (initialized) {
         movk(reg, h3, 3);
       } else {
         movz(reg, h3, 3);
       }
     }
   }
 }
 
 
+void Assembler::LoadDImmediate(VRegister vd, double immd, Register pp) {
+  if (!fmovdi(vd, immd)) {
+    int64_t imm = bit_cast<int64_t, double>(immd);
+    LoadImmediate(TMP, imm, pp);
+    fmovdr(vd, TMP);
+  }
+}
+
+
 void Assembler::AddImmediate(
     Register dest, Register rn, int64_t imm, Register pp) {
   ASSERT(rn != TMP2);
   Operand op;
   if (Operand::CanHold(imm, kXRegSizeInBits, &op) == Operand::Immediate) {
     add(dest, rn, op);
   } else if (Operand::CanHold(-imm, kXRegSizeInBits, &op) ==
              Operand::Immediate) {
     sub(dest, rn, op);
   } else {
@@ skipping 425 matching lines @@
     str(TMP, Address(temp_reg, count_field_offset));
     ldr(TMP, Address(temp_reg, size_field_offset));
     add(TMP, TMP, Operand(size_reg));
     str(TMP, Address(temp_reg, size_field_offset));
   }
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64