[arm, arm64] Implemented unaligned scalar float access.

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"  // NOLINT
 #if defined(TARGET_ARCH_ARM64)
 
 #include "vm/assembler.h"
 #include "vm/cpu.h"
 #include "vm/longjump.h"
@@ skipping 1543 matching lines @@
   if ((sz == kHalfword) || (sz == kUnsignedHalfword)) {
     return;
   }
   LsrImmediate(tmp, src, 16);
   str(tmp, Address(addr, 2), kUnsignedByte);
   LsrImmediate(tmp, src, 24);
   str(tmp, Address(addr, 3), kUnsignedByte);
   if ((sz == kWord) || (sz == kUnsignedWord)) {
     return;
   }
-  LsrImmediate(tmp, src, 24);
+  LsrImmediate(tmp, src, 32);
   str(tmp, Address(addr, 4), kUnsignedByte);
-  LsrImmediate(tmp, src, 32);
+  LsrImmediate(tmp, src, 40);
   str(tmp, Address(addr, 5), kUnsignedByte);
-  LsrImmediate(tmp, src, 40);
+  LsrImmediate(tmp, src, 48);
   str(tmp, Address(addr, 6), kUnsignedByte);
-  LsrImmediate(tmp, src, 48);
+  LsrImmediate(tmp, src, 56);
   str(tmp, Address(addr, 7), kUnsignedByte);
   if (sz == kDoubleWord) {
     return;
   }
   UNIMPLEMENTED();
 }
 
 }  // namespace dart
 
 #endif  // defined TARGET_ARCH_ARM64