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src/hotspot/cpu/x86/macroAssembler_x86.cpp

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5119   // get mirror
5120   const int mirror_offset = in_bytes(Klass::java_mirror_offset());
5121   load_method_holder(mirror, method);
5122   movptr(mirror, Address(mirror, mirror_offset));
5123   resolve_oop_handle(mirror, tmp);
5124 }
5125 
5126 void MacroAssembler::load_method_holder_cld(Register rresult, Register rmethod) {
5127   load_method_holder(rresult, rmethod);
5128   movptr(rresult, Address(rresult, InstanceKlass::class_loader_data_offset()));
5129 }
5130 
5131 void MacroAssembler::load_method_holder(Register holder, Register method) {
5132   movptr(holder, Address(method, Method::const_offset()));                      // ConstMethod*
5133   movptr(holder, Address(holder, ConstMethod::constants_offset()));             // ConstantPool*
5134   movptr(holder, Address(holder, ConstantPool::pool_holder_offset()));          // InstanceKlass*
5135 }
5136 
5137 void MacroAssembler::load_narrow_klass_compact(Register dst, Register src) {
5138   assert(UseCompactObjectHeaders, "expect compact object headers");
5139   movq(dst, Address(src, oopDesc::mark_offset_in_bytes()));
5140   shrq(dst, markWord::klass_shift);
5141 }
5142 
5143 void MacroAssembler::load_klass(Register dst, Register src, Register tmp) {
5144   assert_different_registers(src, tmp);
5145   assert_different_registers(dst, tmp);
5146 
5147   if (UseCompactObjectHeaders) {
5148     load_narrow_klass_compact(dst, src);
5149     decode_klass_not_null(dst, tmp);
5150   } else if (UseCompressedClassPointers) {
5151     movl(dst, Address(src, oopDesc::klass_offset_in_bytes()));
5152     decode_klass_not_null(dst, tmp);
5153   } else {
5154     movptr(dst, Address(src, oopDesc::klass_offset_in_bytes()));
5155   }
5156 }
5157 
5158 void MacroAssembler::store_klass(Register dst, Register src, Register tmp) {
5159   assert(!UseCompactObjectHeaders, "not with compact headers");
5160   assert_different_registers(src, tmp);

5119   // get mirror
5120   const int mirror_offset = in_bytes(Klass::java_mirror_offset());
5121   load_method_holder(mirror, method);
5122   movptr(mirror, Address(mirror, mirror_offset));
5123   resolve_oop_handle(mirror, tmp);
5124 }
5125 
5126 void MacroAssembler::load_method_holder_cld(Register rresult, Register rmethod) {
5127   load_method_holder(rresult, rmethod);
5128   movptr(rresult, Address(rresult, InstanceKlass::class_loader_data_offset()));
5129 }
5130 
5131 void MacroAssembler::load_method_holder(Register holder, Register method) {
5132   movptr(holder, Address(method, Method::const_offset()));                      // ConstMethod*
5133   movptr(holder, Address(holder, ConstMethod::constants_offset()));             // ConstantPool*
5134   movptr(holder, Address(holder, ConstantPool::pool_holder_offset()));          // InstanceKlass*
5135 }
5136 
5137 void MacroAssembler::load_narrow_klass_compact(Register dst, Register src) {
5138   assert(UseCompactObjectHeaders, "expect compact object headers");
5139   movl(dst, Address(src, oopDesc::mark_offset_in_bytes()));
5140   shrl(dst, markWord::klass_shift);
5141 }
5142 
5143 void MacroAssembler::load_klass(Register dst, Register src, Register tmp) {
5144   assert_different_registers(src, tmp);
5145   assert_different_registers(dst, tmp);
5146 
5147   if (UseCompactObjectHeaders) {
5148     load_narrow_klass_compact(dst, src);
5149     decode_klass_not_null(dst, tmp);
5150   } else if (UseCompressedClassPointers) {
5151     movl(dst, Address(src, oopDesc::klass_offset_in_bytes()));
5152     decode_klass_not_null(dst, tmp);
5153   } else {
5154     movptr(dst, Address(src, oopDesc::klass_offset_in_bytes()));
5155   }
5156 }
5157 
5158 void MacroAssembler::store_klass(Register dst, Register src, Register tmp) {
5159   assert(!UseCompactObjectHeaders, "not with compact headers");
5160   assert_different_registers(src, tmp);
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