--- old/src/hotspot/cpu/x86/assembler_x86.cpp	2018-10-31 14:22:32.878960472 +0100
+++ new/src/hotspot/cpu/x86/assembler_x86.cpp	2018-10-31 14:22:32.758960568 +0100
@@ -3350,6 +3350,24 @@
   emit_int8((unsigned char)(0xD0 | encode));
 }
 
+void Assembler::btsl(Address dst, Register idx) {
+  InstructionMark im(this);
+
+  prefix(dst, idx);
+  emit_int8(0x0F);
+  emit_int8(0xAB);
+  emit_operand(idx, dst);
+}
+
+void Assembler::btrl(Address dst, Register idx) {
+  InstructionMark im(this);
+
+  prefix(dst, idx);
+  emit_int8(0x0F);
+  emit_int8(0xB3);
+  emit_operand(idx, dst);
+}
+
 void Assembler::orl(Address dst, int32_t imm32) {
   InstructionMark im(this);
   prefix(dst);