[arm, arm64] Implemented unaligned scalar float access.

runtime/vm/assembler_arm64.h

 // 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.
 
 #ifndef RUNTIME_VM_ASSEMBLER_ARM64_H_
 #define RUNTIME_VM_ASSEMBLER_ARM64_H_
 
 #ifndef RUNTIME_VM_ASSEMBLER_H_
 #error Do not include assembler_arm64.h directly; use assembler.h instead.
 #endif
@@ skipping 825 matching lines @@
     const uint8_t bit54 = (imm64 >> 52) & 0x3;
     const uint8_t bit30 = (imm64 >> 48) & 0xf;
     const uint8_t imm8 = (bit7 << 7) | (bit6 << 6) | (bit54 << 4) | bit30;
     const int64_t expimm8 = Instr::VFPExpandImm(imm8);
     if (imm64 != expimm8) {
       return false;
     }
     EmitFPImm(FMOVDI, vd, imm8);
     return true;
   }
+  void fmovsr(VRegister vd, Register rn) {
+    ASSERT(rn != R31);
+    ASSERT(rn != CSP);
+    const Register crn = ConcreteRegister(rn);
+    EmitFPIntCvtOp(FMOVSR, static_cast<Register>(vd), crn, kWord);
+  }
+  void fmovrs(Register rd, VRegister vn) {
+    ASSERT(rd != R31);
+    ASSERT(rd != CSP);
+    const Register crd = ConcreteRegister(rd);
+    EmitFPIntCvtOp(FMOVRS, crd, static_cast<Register>(vn), kWord);
+  }
   void fmovdr(VRegister vd, Register rn) {
     ASSERT(rn != R31);
     ASSERT(rn != CSP);
     const Register crn = ConcreteRegister(rn);
     EmitFPIntCvtOp(FMOVDR, static_cast<Register>(vd), crn);
   }
   void fmovrd(Register rd, VRegister vn) {
     ASSERT(rd != R31);
     ASSERT(rd != CSP);
     const Register crd = ConcreteRegister(rd);
@@ skipping 1066 matching lines @@
                                   Register value,
                                   Label* no_update);
 
   DISALLOW_ALLOCATION();
   DISALLOW_COPY_AND_ASSIGN(Assembler);
 };
 
 }  // namespace dart
 
 #endif  // RUNTIME_VM_ASSEMBLER_ARM64_H_