A64: Synchronize with r16356.

src/x64/assembler-x64.h

Index: src/x64/assembler-x64.h
diff --git a/src/x64/assembler-x64.h b/src/x64/assembler-x64.h
index f43228f0e16201a9e4e51c05ba69fbf36340b984..b6dc17981181abc0ffd5bd948c41fc3c432ebf4c 100644
--- a/src/x64/assembler-x64.h
+++ b/src/x64/assembler-x64.h
@@ -454,7 +454,6 @@ class CpuFeatures : public AllStatic {
     if (f == SSE3 && !FLAG_enable_sse3) return false;
     if (f == SSE4_1 && !FLAG_enable_sse4_1) return false;
     if (f == CMOV && !FLAG_enable_cmov) return false;
-    if (f == RDTSC && !FLAG_enable_rdtsc) return false;
     if (f == SAHF && !FLAG_enable_sahf) return false;
     return (supported_ & (static_cast<uint64_t>(1) << f)) != 0;
   }
@@ -1155,7 +1154,6 @@ class Assembler : public AssemblerBase {
   void hlt();
   void int3();
   void nop();
-  void rdtsc();
   void ret(int imm16);
   void setcc(Condition cc, Register reg);
 
@@ -1365,6 +1363,8 @@ class Assembler : public AssemblerBase {
   void movmskpd(Register dst, XMMRegister src);
   void movmskps(Register dst, XMMRegister src);
 
+  void cmpltsd(XMMRegister dst, XMMRegister src);
+
   // The first argument is the reg field, the second argument is the r/m field.
   void emit_sse_operand(XMMRegister dst, XMMRegister src);
   void emit_sse_operand(XMMRegister reg, const Operand& adr);