3402 __ get_unsigned_2_byte_index_at_bcp(r3, 1); |
3402 __ get_unsigned_2_byte_index_at_bcp(r3, 1); |
3403 Label slow_case; |
3403 Label slow_case; |
3404 Label done; |
3404 Label done; |
3405 Label initialize_header; |
3405 Label initialize_header; |
3406 Label initialize_object; // including clearing the fields |
3406 Label initialize_object; // including clearing the fields |
3407 Label allocate_shared; |
|
3408 |
3407 |
3409 __ get_cpool_and_tags(r4, r0); |
3408 __ get_cpool_and_tags(r4, r0); |
3410 // Make sure the class we're about to instantiate has been resolved. |
3409 // Make sure the class we're about to instantiate has been resolved. |
3411 // This is done before loading InstanceKlass to be consistent with the order |
3410 // This is done before loading InstanceKlass to be consistent with the order |
3412 // how Constant Pool is updated (see ConstantPool::klass_at_put) |
3411 // how Constant Pool is updated (see ConstantPool::klass_at_put) |
3431 Address(r4, |
3430 Address(r4, |
3432 Klass::layout_helper_offset())); |
3431 Klass::layout_helper_offset())); |
3433 // test to see if it has a finalizer or is malformed in some way |
3432 // test to see if it has a finalizer or is malformed in some way |
3434 __ tbnz(r3, exact_log2(Klass::_lh_instance_slow_path_bit), slow_case); |
3433 __ tbnz(r3, exact_log2(Klass::_lh_instance_slow_path_bit), slow_case); |
3435 |
3434 |
3436 // Allocate the instance |
3435 // Allocate the instance: |
3437 // 1) Try to allocate in the TLAB |
3436 // If TLAB is enabled: |
3438 // 2) if fail and the object is large allocate in the shared Eden |
3437 // Try to allocate in the TLAB. |
3439 // 3) if the above fails (or is not applicable), go to a slow case |
3438 // If fails, go to the slow path. |
3440 // (creates a new TLAB, etc.) |
3439 // Else If inline contiguous allocations are enabled: |
3441 |
3440 // Try to allocate in eden. |
|
3441 // If fails due to heap end, go to slow path. |
|
3442 // |
|
3443 // If TLAB is enabled OR inline contiguous is enabled: |
|
3444 // Initialize the allocation. |
|
3445 // Exit. |
|
3446 // |
|
3447 // Go to slow path. |
3442 const bool allow_shared_alloc = |
3448 const bool allow_shared_alloc = |
3443 Universe::heap()->supports_inline_contig_alloc(); |
3449 Universe::heap()->supports_inline_contig_alloc(); |
3444 |
3450 |
3445 if (UseTLAB) { |
3451 if (UseTLAB) { |
3446 __ tlab_allocate(r0, r3, 0, noreg, r1, |
3452 __ tlab_allocate(r0, r3, 0, noreg, r1, slow_case); |
3447 allow_shared_alloc ? allocate_shared : slow_case); |
|
3448 |
3453 |
3449 if (ZeroTLAB) { |
3454 if (ZeroTLAB) { |
3450 // the fields have been already cleared |
3455 // the fields have been already cleared |
3451 __ b(initialize_header); |
3456 __ b(initialize_header); |
3452 } else { |
3457 } else { |
3453 // initialize both the header and fields |
3458 // initialize both the header and fields |
3454 __ b(initialize_object); |
3459 __ b(initialize_object); |
3455 } |
3460 } |
3456 } |
3461 } else { |
3457 |
3462 // Allocation in the shared Eden, if allowed. |
3458 // Allocation in the shared Eden, if allowed. |
3463 // |
3459 // |
3464 // r3: instance size in bytes |
3460 // r3: instance size in bytes |
3465 if (allow_shared_alloc) { |
3461 if (allow_shared_alloc) { |
3466 __ eden_allocate(r0, r3, 0, r10, slow_case); |
3462 __ bind(allocate_shared); |
3467 __ incr_allocated_bytes(rthread, r3, 0, rscratch1); |
3463 |
3468 } |
3464 __ eden_allocate(r0, r3, 0, r10, slow_case); |
3469 } |
3465 __ incr_allocated_bytes(rthread, r3, 0, rscratch1); |
3470 |
3466 } |
3471 // If UseTLAB or allow_shared_alloc are true, the object is created above and |
3467 |
3472 // there is an initialize need. Otherwise, skip and go to the slow path. |
3468 if (UseTLAB || Universe::heap()->supports_inline_contig_alloc()) { |
3473 if (UseTLAB || allow_shared_alloc) { |
3469 // The object is initialized before the header. If the object size is |
3474 // The object is initialized before the header. If the object size is |
3470 // zero, go directly to the header initialization. |
3475 // zero, go directly to the header initialization. |
3471 __ bind(initialize_object); |
3476 __ bind(initialize_object); |
3472 __ sub(r3, r3, sizeof(oopDesc)); |
3477 __ sub(r3, r3, sizeof(oopDesc)); |
3473 __ cbz(r3, initialize_header); |
3478 __ cbz(r3, initialize_header); |