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_value(Register oop, Register temp, Label* is_value, Label* is_not_value) {
3732 const int mask = Universe::oop_metadata_valuetype_mask();
3733 assert((is_value != NULL) || (is_not_value != NULL), "Need a label to jump to");
3734 assert((is_value == NULL) ^ (is_not_value == NULL), "Need one label");
3735 #ifdef _LP64
3736 if (UseCompressedClassPointers) {
3737 movl(temp, Address(oop, oopDesc::klass_offset_in_bytes()));
3738 } else
3739 #endif
3740 movptr(temp, Address(oop, oopDesc::klass_offset_in_bytes()));
3741
3742 andl(temp, mask);
3743 testl(temp, temp);
3744 if (is_not_value != NULL) {
3745 jcc(Assembler::zero, *is_not_value);
3746 } else {
3747 jcc(Assembler::notZero, *is_value);
3748 }
3749 }
3750
3751 void MacroAssembler::os_breakpoint() {
3752 // instead of directly emitting a breakpoint, call os:breakpoint for better debugability
3753 // (e.g., MSVC can't call ps() otherwise)
3754 call(RuntimeAddress(CAST_FROM_FN_PTR(address, os::breakpoint)));
3755 }
3756
3757 void MacroAssembler::unimplemented(const char* what) {
3758 const char* buf = NULL;
3759 {
3760 ResourceMark rm;
3761 stringStream ss;
3762 ss.print("unimplemented: %s", what);
3763 buf = code_string(ss.as_string());
3764 }
3765 stop(buf);
3766 }
3767
3768 #ifdef _LP64
3769 #define XSTATE_BV 0x200
3770 #endif
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