A64: Fix Fmov with signalling NaN literals.

src/a64/assembler-a64.h

Index: src/a64/assembler-a64.h
diff --git a/src/a64/assembler-a64.h b/src/a64/assembler-a64.h
index cb018a4b778ac6c07e29d355bd5631366f15001f..2c8f7dd015360a40e60e72429fd8e2db60ad8b90 100644
--- a/src/a64/assembler-a64.h
+++ b/src/a64/assembler-a64.h
@@ -1386,6 +1386,7 @@ class Assembler : public AssemblerBase {
 
   // 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
@@ -1464,6 +1465,7 @@ class Assembler : public AssemblerBase {
   // 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);