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// Load Narrow Klass Pointer
instruct loadNKlass(iRegNNoSp dst, memory4 mem)
%{
match(Set dst (LoadNKlass mem));
! predicate(!needs_acquiring_load(n));
ins_cost(4 * INSN_COST);
format %{ "ldrw $dst, $mem\t# compressed class ptr" %}
ins_encode(aarch64_enc_ldrw(dst, mem));
ins_pipe(iload_reg_mem);
%}
// Load Float
instruct loadF(vRegF dst, memory4 mem)
%{
match(Set dst (LoadF mem));
predicate(!needs_acquiring_load(n));
// Load Narrow Klass Pointer
instruct loadNKlass(iRegNNoSp dst, memory4 mem)
%{
match(Set dst (LoadNKlass mem));
! predicate(!needs_acquiring_load(n) && !UseCompactObjectHeaders);
ins_cost(4 * INSN_COST);
format %{ "ldrw $dst, $mem\t# compressed class ptr" %}
ins_encode(aarch64_enc_ldrw(dst, mem));
ins_pipe(iload_reg_mem);
%}
+ instruct loadNKlassCompactHeaders(iRegNNoSp dst, memory4 mem, rFlagsReg cr)
+ %{
+ match(Set dst (LoadNKlass mem));
+ effect(KILL cr);
+ predicate(!needs_acquiring_load(n) && UseCompactObjectHeaders);
+
+ ins_cost(4 * INSN_COST);
+ format %{ "ldrw $dst, $mem\t# compressed class ptr" %}
+ ins_encode %{
+ assert($mem$$disp == oopDesc::klass_offset_in_bytes(), "expect correct offset");
+ assert($mem$$index$$Register == noreg, "expect no index");
+ __ load_nklass_compact($dst$$Register, $mem$$base$$Register);
+ %}
+ ins_pipe(pipe_slow);
+ %}
+
// Load Float
instruct loadF(vRegF dst, memory4 mem)
%{
match(Set dst (LoadF mem));
predicate(!needs_acquiring_load(n));
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