3711 // Test below is ordered based on the relative positions of
3712 // the Java heap and the VTBuffer to execute a single test for heap-allocated values
3713
3714 if (VTBuffer::base() < Universe::heap()->base()) {
3715 lea(temp_reg, VTBuffer_end);
3716 cmpptr(value, temp_reg);
3717 jcc(Assembler::greaterEqual, not_buffered);
3718 lea(temp_reg, VTBuffer_top);
3719 cmpptr(value, temp_reg);
3720 jcc(Assembler::less, not_buffered);
3721 } else {
3722 lea(temp_reg, VTBuffer_top);
3723 cmpptr(value, temp_reg);
3724 jcc(Assembler::less, not_buffered);
3725 lea(temp_reg, VTBuffer_end);
3726 cmpptr(value, temp_reg);
3727 jcc(Assembler::greaterEqual, not_buffered);
3728 }
3729 }
3730
3731 void MacroAssembler::os_breakpoint() {
3732 // instead of directly emitting a breakpoint, call os:breakpoint for better debugability
3733 // (e.g., MSVC can't call ps() otherwise)
3734 call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint)));
3735 }
3736
3737 void MacroAssembler::unimplemented(const char* what) {
3738 const char* buf = NULL;
3739 {
3740 ResourceMark rm;
3741 stringStream ss;
3742 ss.print("unimplemented: %s", what);
3743 buf = code_string(ss.as_string());
3744 }
3745 stop(buf);
3746 }
3747
3748 #ifdef _LP64
3749 #define XSTATE_BV 0x200
3750 #endif
|
3711 // Test below is ordered based on the relative positions of
3712 // the Java heap and the VTBuffer to execute a single test for heap-allocated values
3713
3714 if (VTBuffer::base() < Universe::heap()->base()) {
3715 lea(temp_reg, VTBuffer_end);
3716 cmpptr(value, temp_reg);
3717 jcc(Assembler::greaterEqual, not_buffered);
3718 lea(temp_reg, VTBuffer_top);
3719 cmpptr(value, temp_reg);
3720 jcc(Assembler::less, not_buffered);
3721 } else {
3722 lea(temp_reg, VTBuffer_top);
3723 cmpptr(value, temp_reg);
3724 jcc(Assembler::less, not_buffered);
3725 lea(temp_reg, VTBuffer_end);
3726 cmpptr(value, temp_reg);
3727 jcc(Assembler::greaterEqual, not_buffered);
3728 }
3729 }
3730
3731 void MacroAssembler::test_oop_is_not_value(Register oop, Register temp, Label& is_not_value) {
3732 const int mask = Universe::oop_metadata_valuetype_mask();
3733 #ifdef _LP64
3734 if (UseCompressedClassPointers) {
3735 movl(temp, Address(oop, oopDesc::klass_offset_in_bytes()));
3736 } else
3737 #endif
3738 movptr(temp, Address(oop, oopDesc::klass_offset_in_bytes()));
3739
3740 andl(temp, mask);
3741 testl(temp, temp);
3742 jcc(Assembler::zero, is_not_value);
3743 }
3744
3745 void MacroAssembler::os_breakpoint() {
3746 // instead of directly emitting a breakpoint, call os:breakpoint for better debugability
3747 // (e.g., MSVC can't call ps() otherwise)
3748 call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint)));
3749 }
3750
3751 void MacroAssembler::unimplemented(const char* what) {
3752 const char* buf = NULL;
3753 {
3754 ResourceMark rm;
3755 stringStream ss;
3756 ss.print("unimplemented: %s", what);
3757 buf = code_string(ss.as_string());
3758 }
3759 stop(buf);
3760 }
3761
3762 #ifdef _LP64
3763 #define XSTATE_BV 0x200
3764 #endif
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