3536 // there is an initialize need. Otherwise, skip and go to the slow path.
3537 if (UseTLAB || allow_shared_alloc) {
3538 // The object is initialized before the header. If the object size is
3539 // zero, go directly to the header initialization.
3540 __ bind(initialize_object);
3541 __ sub(r3, r3, sizeof(oopDesc));
3542 __ cbz(r3, initialize_header);
3543
3544 // Initialize object fields
3545 {
3546 __ add(r2, r0, sizeof(oopDesc));
3547 Label loop;
3548 __ bind(loop);
3549 __ str(zr, Address(__ post(r2, BytesPerLong)));
3550 __ sub(r3, r3, BytesPerLong);
3551 __ cbnz(r3, loop);
3552 }
3553
3554 // initialize object header only.
3555 __ bind(initialize_header);
3556 __ mov(rscratch1, (intptr_t)markWord::prototype().value());
3557 __ str(rscratch1, Address(r0, oopDesc::mark_offset_in_bytes()));
3558 __ store_klass_gap(r0, zr); // zero klass gap for compressed oops
3559 __ store_klass(r0, r4); // store klass last
3560
3561 {
3562 SkipIfEqual skip(_masm, &DTraceAllocProbes, false);
3563 // Trigger dtrace event for fastpath
3564 __ push(atos); // save the return value
3565 __ call_VM_leaf(
3566 CAST_FROM_FN_PTR(address, static_cast<int (*)(oopDesc*)>(SharedRuntime::dtrace_object_alloc)), r0);
3567 __ pop(atos); // restore the return value
3568
3569 }
3570 __ b(done);
3571 }
3572
3573 // slow case
3574 __ bind(slow_case);
3575 __ get_constant_pool(c_rarg1);
3576 __ get_unsigned_2_byte_index_at_bcp(c_rarg2, 1);
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3536 // there is an initialize need. Otherwise, skip and go to the slow path.
3537 if (UseTLAB || allow_shared_alloc) {
3538 // The object is initialized before the header. If the object size is
3539 // zero, go directly to the header initialization.
3540 __ bind(initialize_object);
3541 __ sub(r3, r3, sizeof(oopDesc));
3542 __ cbz(r3, initialize_header);
3543
3544 // Initialize object fields
3545 {
3546 __ add(r2, r0, sizeof(oopDesc));
3547 Label loop;
3548 __ bind(loop);
3549 __ str(zr, Address(__ post(r2, BytesPerLong)));
3550 __ sub(r3, r3, BytesPerLong);
3551 __ cbnz(r3, loop);
3552 }
3553
3554 // initialize object header only.
3555 __ bind(initialize_header);
3556 __ ldr(rscratch1, Address(r4, Klass::prototype_header_offset()));
3557 __ str(rscratch1, Address(r0, oopDesc::mark_offset_in_bytes()));
3558 __ store_klass_gap(r0, zr); // zero klass gap for compressed oops
3559 __ store_klass(r0, r4); // store klass last
3560
3561 {
3562 SkipIfEqual skip(_masm, &DTraceAllocProbes, false);
3563 // Trigger dtrace event for fastpath
3564 __ push(atos); // save the return value
3565 __ call_VM_leaf(
3566 CAST_FROM_FN_PTR(address, static_cast<int (*)(oopDesc*)>(SharedRuntime::dtrace_object_alloc)), r0);
3567 __ pop(atos); // restore the return value
3568
3569 }
3570 __ b(done);
3571 }
3572
3573 // slow case
3574 __ bind(slow_case);
3575 __ get_constant_pool(c_rarg1);
3576 __ get_unsigned_2_byte_index_at_bcp(c_rarg2, 1);
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