A64: Fix Fmov with signalling NaN literals.

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 1368 matching lines @@
 
   // Store integer or FP register pair, non-temporal.
   void stnp(const CPURegister& rt, const CPURegister& rt2,
             const MemOperand& dst);
 
   // Load literal to register.
   void ldr(const Register& rt, uint64_t imm);
 
   // Load literal to FP register.
   void ldr(const FPRegister& ft, double imm);
+  void ldr(const FPRegister& ft, float imm);
 
   // Move instructions. The default shift of -1 indicates that the move
   // instruction will calculate an appropriate 16-bit immediate and left shift
   // that is equal to the 64-bit immediate argument. If an explicit left shift
   // is specified (0, 16, 32 or 48), the immediate must be a 16-bit value.
   //
   // For movk, an explicit shift can be used to indicate which half word should
   // be overwritten, eg. movk(x0, 0, 0) will overwrite the least-significant
   // half word with zero, whereas movk(x0, 0, 48) will overwrite the
   // most-significant.
@@ skipping 58 matching lines @@
   };
 
   void nop(NopMarkerTypes n) {
     ASSERT((FIRST_NOP_MARKER <= n) && (n <= LAST_NOP_MARKER));
     mov(Register::XRegFromCode(n), Register::XRegFromCode(n));
   }
 
   // FP instructions.
   // Move immediate to FP register.
   void fmov(FPRegister fd, double imm);
+  void fmov(FPRegister fd, float imm);
 
   // Move FP register to register.
   void fmov(Register rd, FPRegister fn);
 
   // Move register to FP register.
   void fmov(FPRegister fd, Register rn);
 
   // Move FP register to FP register.
   void fmov(FPRegister fd, FPRegister fn);
 
@@ skipping 691 matching lines @@
 class EnsureSpace BASE_EMBEDDED {
  public:
   explicit EnsureSpace(Assembler* assembler) {
     assembler->CheckBuffer();
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_A64_ASSEMBLER_A64_H_