A64: Restore FP registers in Deoptimizer::EntryGenerator::Generate

src/a64/assembler-a64.h

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 324 matching lines @@
 STATIC_ASSERT(kJSSPCode == 28);
 const Register jssp = x28;
 const Register wjssp = w28;
 const Register fp = x29;
 const Register lr = x30;
 const Register xzr = x31;
 const Register wzr = w31;
 
 // Crankshaft double scratch register.
 const FPRegister crankshaft_fp_scratch = d29;
+// Keeps the 0 double value.
+const FPRegister fp_zero = d30;
 // MacroAssembler double scratch register.
 const FPRegister fp_scratch = d31;
 
 // AreAliased returns true if any of the named registers overlap. Arguments set
 // to NoReg are ignored. The system stack pointer may be specified.
 bool AreAliased(const CPURegister& reg1,
                 const CPURegister& reg2,
                 const CPURegister& reg3 = NoReg,
                 const CPURegister& reg4 = NoReg,
                 const CPURegister& reg5 = NoReg,
@@ skipping 1676 matching lines @@
 class EnsureSpace BASE_EMBEDDED {
  public:
   explicit EnsureSpace(Assembler* assembler) {
     assembler->CheckBuffer();
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_A64_ASSEMBLER_A64_H_