A64 support for DoubleToIStub (truncating).

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 365 matching lines @@
 
 // Crankshaft double scratch register.
 ALIAS_REGISTER(FPRegister, crankshaft_fp_scratch, d29);
 // Keeps the 0 double value.
 ALIAS_REGISTER(FPRegister, fp_zero, d30);
 // MacroAssembler double scratch register.
 ALIAS_REGISTER(FPRegister, fp_scratch, d31);
 
 #undef ALIAS_REGISTER
 
+
+Register GetAllocatableRegisterThatIsNotOneOf(Register reg1,
+                                              Register reg2 = NoReg,
+                                              Register reg3 = NoReg,
+                                              Register reg4 = NoReg);
+
+
 // 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,
                 const CPURegister& reg6 = NoReg,
                 const CPURegister& reg7 = NoReg,
                 const CPURegister& reg8 = NoReg);
@@ skipping 1640 matching lines @@
 class EnsureSpace BASE_EMBEDDED {
  public:
   explicit EnsureSpace(Assembler* assembler) {
     assembler->CheckBuffer();
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_A64_ASSEMBLER_A64_H_