3804
3805 __ cmpdi(CCR1, Rscratch, InstanceKlass::fully_initialized);
3806 // Make sure klass does not have has_finalizer, or is abstract, or interface or java/lang/Class.
3807 __ andi_(R0, Rinstance_size, Klass::_lh_instance_slow_path_bit); // slow path bit equals 0?
3808
3809 __ crnand(CCR0, Assembler::equal, CCR1, Assembler::equal); // slow path bit set or not fully initialized?
3810 __ beq(CCR0, Lslow_case);
3811
3812 // --------------------------------------------------------------------------
3813 // Fast case:
3814 // Allocate the instance.
3815 // 1) Try to allocate in the TLAB.
3816 // 2) If the above fails (or is not applicable), go to a slow case (creates a new TLAB, etc.).
3817
3818 Register RoldTopValue = RallocatedObject; // Object will be allocated here if it fits.
3819 Register RnewTopValue = R6_ARG4;
3820 Register RendValue = R7_ARG5;
3821
3822 // Check if we can allocate in the TLAB.
3823 __ ld(RoldTopValue, in_bytes(JavaThread::tlab_top_offset()), R16_thread);
3824 __ ld(RendValue, in_bytes(JavaThread::tlab_end_offset()), R16_thread);
3825
3826 __ add(RnewTopValue, Rinstance_size, RoldTopValue);
3827
3828 // If there is enough space, we do not CAS and do not clear.
3829 __ cmpld(CCR0, RnewTopValue, RendValue);
3830 __ bgt(CCR0, Lslow_case);
3831
3832 __ std(RnewTopValue, in_bytes(JavaThread::tlab_top_offset()), R16_thread);
3833
3834 if (!ZeroTLAB) {
3835 // --------------------------------------------------------------------------
3836 // Init1: Zero out newly allocated memory.
3837 // Initialize remaining object fields.
3838 Register Rbase = Rtags;
3839 __ addi(Rinstance_size, Rinstance_size, 7 - (int)sizeof(oopDesc));
3840 __ addi(Rbase, RallocatedObject, sizeof(oopDesc));
3841 __ srdi(Rinstance_size, Rinstance_size, 3);
3842
3843 // Clear out object skipping header. Takes also care of the zero length case.
3844 __ clear_memory_doubleword(Rbase, Rinstance_size);
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3804
3805 __ cmpdi(CCR1, Rscratch, InstanceKlass::fully_initialized);
3806 // Make sure klass does not have has_finalizer, or is abstract, or interface or java/lang/Class.
3807 __ andi_(R0, Rinstance_size, Klass::_lh_instance_slow_path_bit); // slow path bit equals 0?
3808
3809 __ crnand(CCR0, Assembler::equal, CCR1, Assembler::equal); // slow path bit set or not fully initialized?
3810 __ beq(CCR0, Lslow_case);
3811
3812 // --------------------------------------------------------------------------
3813 // Fast case:
3814 // Allocate the instance.
3815 // 1) Try to allocate in the TLAB.
3816 // 2) If the above fails (or is not applicable), go to a slow case (creates a new TLAB, etc.).
3817
3818 Register RoldTopValue = RallocatedObject; // Object will be allocated here if it fits.
3819 Register RnewTopValue = R6_ARG4;
3820 Register RendValue = R7_ARG5;
3821
3822 // Check if we can allocate in the TLAB.
3823 __ ld(RoldTopValue, in_bytes(JavaThread::tlab_top_offset()), R16_thread);
3824 __ ld(RendValue, in_bytes(JavaThread::tlab_current_end_offset()), R16_thread);
3825
3826 __ add(RnewTopValue, Rinstance_size, RoldTopValue);
3827
3828 // If there is enough space, we do not CAS and do not clear.
3829 __ cmpld(CCR0, RnewTopValue, RendValue);
3830 __ bgt(CCR0, Lslow_case);
3831
3832 __ std(RnewTopValue, in_bytes(JavaThread::tlab_top_offset()), R16_thread);
3833
3834 if (!ZeroTLAB) {
3835 // --------------------------------------------------------------------------
3836 // Init1: Zero out newly allocated memory.
3837 // Initialize remaining object fields.
3838 Register Rbase = Rtags;
3839 __ addi(Rinstance_size, Rinstance_size, 7 - (int)sizeof(oopDesc));
3840 __ addi(Rbase, RallocatedObject, sizeof(oopDesc));
3841 __ srdi(Rinstance_size, Rinstance_size, 3);
3842
3843 // Clear out object skipping header. Takes also care of the zero length case.
3844 __ clear_memory_doubleword(Rbase, Rinstance_size);
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