4380
4381 // Allocate the instance:
4382 // If TLAB is enabled:
4383 // Try to allocate in the TLAB.
4384 // If fails, go to the slow path.
4385 // Else If inline contiguous allocations are enabled:
4386 // Try to allocate in eden.
4387 // If fails due to heap end, go to slow path.
4388 //
4389 // If TLAB is enabled OR inline contiguous is enabled:
4390 // Initialize the allocation.
4391 // Exit.
4392 //
4393 // Go to slow path.
4394 if (UseTLAB) {
4395 const Register Rtlab_top = R1_tmp;
4396 const Register Rtlab_end = R2_tmp;
4397 assert_different_registers(Robj, Rsize, Rklass, Rtlab_top, Rtlab_end);
4398
4399 __ ldr(Robj, Address(Rthread, JavaThread::tlab_top_offset()));
4400 __ ldr(Rtlab_end, Address(Rthread, in_bytes(JavaThread::tlab_end_offset())));
4401 __ add(Rtlab_top, Robj, Rsize);
4402 __ cmp(Rtlab_top, Rtlab_end);
4403 __ b(slow_case, hi);
4404 __ str(Rtlab_top, Address(Rthread, JavaThread::tlab_top_offset()));
4405 if (ZeroTLAB) {
4406 // the fields have been already cleared
4407 __ b(initialize_header);
4408 } else {
4409 // initialize both the header and fields
4410 __ b(initialize_object);
4411 }
4412 } else {
4413 // Allocation in the shared Eden, if allowed.
4414 if (allow_shared_alloc) {
4415 const Register Rheap_top_addr = R2_tmp;
4416 const Register Rheap_top = R5_tmp;
4417 const Register Rheap_end = Rtemp;
4418 assert_different_registers(Robj, Rklass, Rsize, Rheap_top_addr, Rheap_top, Rheap_end, LR);
4419
4420 // heap_end now (re)loaded in the loop since also used as a scratch register in the CAS
|
4380
4381 // Allocate the instance:
4382 // If TLAB is enabled:
4383 // Try to allocate in the TLAB.
4384 // If fails, go to the slow path.
4385 // Else If inline contiguous allocations are enabled:
4386 // Try to allocate in eden.
4387 // If fails due to heap end, go to slow path.
4388 //
4389 // If TLAB is enabled OR inline contiguous is enabled:
4390 // Initialize the allocation.
4391 // Exit.
4392 //
4393 // Go to slow path.
4394 if (UseTLAB) {
4395 const Register Rtlab_top = R1_tmp;
4396 const Register Rtlab_end = R2_tmp;
4397 assert_different_registers(Robj, Rsize, Rklass, Rtlab_top, Rtlab_end);
4398
4399 __ ldr(Robj, Address(Rthread, JavaThread::tlab_top_offset()));
4400 __ ldr(Rtlab_end, Address(Rthread, in_bytes(JavaThread::tlab_current_end_offset())));
4401 __ add(Rtlab_top, Robj, Rsize);
4402 __ cmp(Rtlab_top, Rtlab_end);
4403 __ b(slow_case, hi);
4404 __ str(Rtlab_top, Address(Rthread, JavaThread::tlab_top_offset()));
4405 if (ZeroTLAB) {
4406 // the fields have been already cleared
4407 __ b(initialize_header);
4408 } else {
4409 // initialize both the header and fields
4410 __ b(initialize_object);
4411 }
4412 } else {
4413 // Allocation in the shared Eden, if allowed.
4414 if (allow_shared_alloc) {
4415 const Register Rheap_top_addr = R2_tmp;
4416 const Register Rheap_top = R5_tmp;
4417 const Register Rheap_end = Rtemp;
4418 assert_different_registers(Robj, Rklass, Rsize, Rheap_top_addr, Rheap_top, Rheap_end, LR);
4419
4420 // heap_end now (re)loaded in the loop since also used as a scratch register in the CAS
|