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comparison src/cpu/sparc/vm/templateTable_sparc.cpp @ 3892:baf763f388e6

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7059037: Use BIS for zeroing on T4 Summary: Use BIS for zeroing new allocated big (2Kb and more) objects and arrays. Reviewed-by: never, twisti, ysr
author kvn
date Fri, 26 Aug 2011 08:52:22 -0700
parents fdb992d83a87
children 52b5d32fbfaf 069ab3f976d3
comparison
equal deleted inserted replaced
3891:ac8738449b6f 3892:baf763f388e6
3372 const bool allow_shared_alloc = 3372 const bool allow_shared_alloc =
3373 Universe::heap()->supports_inline_contig_alloc() && !CMSIncrementalMode; 3373 Universe::heap()->supports_inline_contig_alloc() && !CMSIncrementalMode;
3374 3374
3375 if(UseTLAB) { 3375 if(UseTLAB) {
3376 Register RoldTopValue = RallocatedObject; 3376 Register RoldTopValue = RallocatedObject;
3377 Register RtopAddr = G3_scratch, RtlabWasteLimitValue = G3_scratch; 3377 Register RtlabWasteLimitValue = G3_scratch;
3378 Register RnewTopValue = G1_scratch; 3378 Register RnewTopValue = G1_scratch;
3379 Register RendValue = Rscratch; 3379 Register RendValue = Rscratch;
3380 Register RfreeValue = RnewTopValue; 3380 Register RfreeValue = RnewTopValue;
3381 3381
3382 // check if we can allocate in the TLAB 3382 // check if we can allocate in the TLAB
3453 __ deccc(Roffset, sizeof(oopDesc)); 3453 __ deccc(Roffset, sizeof(oopDesc));
3454 __ br(Assembler::zero, false, Assembler::pt, initialize_header); 3454 __ br(Assembler::zero, false, Assembler::pt, initialize_header);
3455 __ delayed()->add(RallocatedObject, sizeof(oopDesc), G3_scratch); 3455 __ delayed()->add(RallocatedObject, sizeof(oopDesc), G3_scratch);
3456 3456
3457 // initialize remaining object fields 3457 // initialize remaining object fields
3458 { Label loop; 3458 if (UseBlockZeroing) {
3459 // Use BIS for zeroing
3460 __ bis_zeroing(G3_scratch, Roffset, G1_scratch, initialize_header);
3461 } else {
3462 Label loop;
3459 __ subcc(Roffset, wordSize, Roffset); 3463 __ subcc(Roffset, wordSize, Roffset);
3460 __ bind(loop); 3464 __ bind(loop);
3461 //__ subcc(Roffset, wordSize, Roffset); // executed above loop or in delay slot 3465 //__ subcc(Roffset, wordSize, Roffset); // executed above loop or in delay slot
3462 __ st_ptr(G0, G3_scratch, Roffset); 3466 __ st_ptr(G0, G3_scratch, Roffset);
3463 __ br(Assembler::notEqual, false, Assembler::pt, loop); 3467 __ br(Assembler::notEqual, false, Assembler::pt, loop);