diff -r 7bbaa3c416e7 -r f0312c7d5b37 src/hotspot/cpu/x86/assembler_x86.hpp
--- a/src/hotspot/cpu/x86/assembler_x86.hpp	Mon Oct 21 19:58:16 2019 +0200
+++ b/src/hotspot/cpu/x86/assembler_x86.hpp	Wed Nov 13 11:21:15 2019 +0100
@@ -1592,6 +1592,9 @@
 
 #ifdef _LP64
   void notq(Register dst);
+
+  void btsq(Address dst, int imm8);
+  void btrq(Address dst, int imm8);
 #endif
 
   void orl(Address dst, int32_t imm32);