src/cpu/x86/vm/assembler_x86.cpp

rev 8802 : G1 performance improvements: card batching, joining, sorting, prefetching and write barrier fence elision and simplification based on a global syncrhonization using handshakes piggybacking on thread-local safepoints.

@@ -3496,10 +3496,18 @@
   NOT_LP64(assert(dst->has_byte_register(), "must have byte register"));
   (void) prefix_and_encode(dst->encoding(), true);
   emit_arith_b(0xF6, 0xC0, dst, imm8);
 }
 
+void Assembler::testb(Address dst, int8_t imm8) {
+  InstructionMark im(this);
+  prefix(dst);
+  emit_int8((unsigned char)0xF6);
+  emit_operand(rax, dst, 1);
+  emit_int8((unsigned char)imm8);
+}
+
 void Assembler::testl(Register dst, int32_t imm32) {
   // not using emit_arith because test
   // doesn't support sign-extension of
   // 8bit operands
   int encode = dst->encoding();