912 guarantee(referent_offset > 0, "referent offset not initialized");
913
914 if (UseG1GC || UseShenandoahGC) {
915 Label slow_path;
916 const Register local_0 = c_rarg0;
917 // Check if local 0 != NULL
918 // If the receiver is null then it is OK to jump to the slow path.
919 __ ldr(local_0, Address(esp, 0));
920 __ cbz(local_0, slow_path);
921
922 oopDesc::bs()->interpreter_read_barrier_not_null(_masm, local_0);
923
924 // Load the value of the referent field.
925 const Address field_address(local_0, referent_offset);
926 __ load_heap_oop(local_0, field_address);
927
928 __ mov(r19, r13); // Move senderSP to a callee-saved register
929
930 // Generate the G1 pre-barrier code to log the value of
931 // the referent field in an SATB buffer.
932 __ keep_alive_barrier(local_0 /* pre_val */,
933 rthread /* thread */,
934 rscratch2 /* tmp */);
935 // areturn
936 __ andr(sp, r19, -16); // done with stack
937 __ ret(lr);
938
939 // generate a vanilla interpreter entry as the slow path
940 __ bind(slow_path);
941 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals));
942 return entry;
943 }
944 #endif // INCLUDE_ALL_GCS
945
946 // If G1 is not enabled then attempt to go through the accessor entry point
947 // Reference.get is an accessor
948 return NULL;
949 }
950
951 /**
952 * Method entry for static native methods:
953 * int java.util.zip.CRC32.update(int crc, int b)
954 */
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912 guarantee(referent_offset > 0, "referent offset not initialized");
913
914 if (UseG1GC || UseShenandoahGC) {
915 Label slow_path;
916 const Register local_0 = c_rarg0;
917 // Check if local 0 != NULL
918 // If the receiver is null then it is OK to jump to the slow path.
919 __ ldr(local_0, Address(esp, 0));
920 __ cbz(local_0, slow_path);
921
922 oopDesc::bs()->interpreter_read_barrier_not_null(_masm, local_0);
923
924 // Load the value of the referent field.
925 const Address field_address(local_0, referent_offset);
926 __ load_heap_oop(local_0, field_address);
927
928 __ mov(r19, r13); // Move senderSP to a callee-saved register
929
930 // Generate the G1 pre-barrier code to log the value of
931 // the referent field in an SATB buffer.
932 __ enter(); // g1_write may call runtime
933 __ keep_alive_barrier(local_0 /* pre_val */,
934 rthread /* thread */,
935 rscratch2 /* tmp */);
936 __ leave();
937 // areturn
938 __ andr(sp, r19, -16); // done with stack
939 __ ret(lr);
940
941 // generate a vanilla interpreter entry as the slow path
942 __ bind(slow_path);
943 __ jump_to_entry(Interpreter::entry_for_kind(Interpreter::zerolocals));
944 return entry;
945 }
946 #endif // INCLUDE_ALL_GCS
947
948 // If G1 is not enabled then attempt to go through the accessor entry point
949 // Reference.get is an accessor
950 return NULL;
951 }
952
953 /**
954 * Method entry for static native methods:
955 * int java.util.zip.CRC32.update(int crc, int b)
956 */
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