3275 // If fails due to heap end, go to slow path.
3276 //
3277 // If TLAB is enabled OR inline contiguous is enabled:
3278 // Initialize the allocation.
3279 // Exit.
3280 //
3281 // Go to slow path.
3282
3283 const bool allow_shared_alloc =
3284 Universe::heap()->supports_inline_contig_alloc();
3285
3286 if(UseTLAB) {
3287 Register RoldTopValue = RallocatedObject;
3288 Register RtlabWasteLimitValue = G3_scratch;
3289 Register RnewTopValue = G1_scratch;
3290 Register RendValue = Rscratch;
3291 Register RfreeValue = RnewTopValue;
3292
3293 // check if we can allocate in the TLAB
3294 __ ld_ptr(G2_thread, in_bytes(JavaThread::tlab_top_offset()), RoldTopValue); // sets up RalocatedObject
3295 __ ld_ptr(G2_thread, in_bytes(JavaThread::tlab_end_offset()), RendValue);
3296 __ add(RoldTopValue, Roffset, RnewTopValue);
3297
3298 // if there is enough space, we do not CAS and do not clear
3299 __ cmp(RnewTopValue, RendValue);
3300 if(ZeroTLAB) {
3301 // the fields have already been cleared
3302 __ brx(Assembler::lessEqualUnsigned, true, Assembler::pt, initialize_header);
3303 } else {
3304 // initialize both the header and fields
3305 __ brx(Assembler::lessEqualUnsigned, true, Assembler::pt, initialize_object);
3306 }
3307 __ delayed()->st_ptr(RnewTopValue, G2_thread, in_bytes(JavaThread::tlab_top_offset()));
3308
3309 // Allocation does not fit in the TLAB.
3310 __ ba_short(slow_case);
3311 } else {
3312 // Allocation in the shared Eden
3313 if (allow_shared_alloc) {
3314 Register RoldTopValue = G1_scratch;
3315 Register RtopAddr = G3_scratch;
|
3275 // If fails due to heap end, go to slow path.
3276 //
3277 // If TLAB is enabled OR inline contiguous is enabled:
3278 // Initialize the allocation.
3279 // Exit.
3280 //
3281 // Go to slow path.
3282
3283 const bool allow_shared_alloc =
3284 Universe::heap()->supports_inline_contig_alloc();
3285
3286 if(UseTLAB) {
3287 Register RoldTopValue = RallocatedObject;
3288 Register RtlabWasteLimitValue = G3_scratch;
3289 Register RnewTopValue = G1_scratch;
3290 Register RendValue = Rscratch;
3291 Register RfreeValue = RnewTopValue;
3292
3293 // check if we can allocate in the TLAB
3294 __ ld_ptr(G2_thread, in_bytes(JavaThread::tlab_top_offset()), RoldTopValue); // sets up RalocatedObject
3295 __ ld_ptr(G2_thread, in_bytes(JavaThread::tlab_current_end_offset()), RendValue);
3296 __ add(RoldTopValue, Roffset, RnewTopValue);
3297
3298 // if there is enough space, we do not CAS and do not clear
3299 __ cmp(RnewTopValue, RendValue);
3300 if(ZeroTLAB) {
3301 // the fields have already been cleared
3302 __ brx(Assembler::lessEqualUnsigned, true, Assembler::pt, initialize_header);
3303 } else {
3304 // initialize both the header and fields
3305 __ brx(Assembler::lessEqualUnsigned, true, Assembler::pt, initialize_object);
3306 }
3307 __ delayed()->st_ptr(RnewTopValue, G2_thread, in_bytes(JavaThread::tlab_top_offset()));
3308
3309 // Allocation does not fit in the TLAB.
3310 __ ba_short(slow_case);
3311 } else {
3312 // Allocation in the shared Eden
3313 if (allow_shared_alloc) {
3314 Register RoldTopValue = G1_scratch;
3315 Register RtopAddr = G3_scratch;
|