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7059037: Use BIS for zeroing on T4

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Use BIS for zeroing new allocated big (2Kb and more) objects and arrays.

Reviewed-by: never, twisti, ysr
This commit is contained in:
Vladimir Kozlov 2011-08-26 08:52:22 -07:00
parent 19f7fb98b8
commit 6446205688
14 changed files with 232 additions and 35 deletions
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8
hotspot/src/cpu/sparc/vm/templateTable_sparc.cpp
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@ -3374,7 +3374,7 @@ void TemplateTable::_new() {
if(UseTLAB) {
Register RoldTopValue = RallocatedObject;
Register RtopAddr = G3_scratch, RtlabWasteLimitValue = G3_scratch;
Register RtlabWasteLimitValue = G3_scratch;
Register RnewTopValue = G1_scratch;
Register RendValue = Rscratch;
Register RfreeValue = RnewTopValue;
@ -3455,7 +3455,11 @@ void TemplateTable::_new() {
__ delayed()->add(RallocatedObject, sizeof(oopDesc), G3_scratch);
// initialize remaining object fields
{ Label loop;
if (UseBlockZeroing) {
// Use BIS for zeroing
__ bis_zeroing(G3_scratch, Roffset, G1_scratch, initialize_header);
} else {
Label loop;
__ subcc(Roffset, wordSize, Roffset);
__ bind(loop);
//__ subcc(Roffset, wordSize, Roffset); // executed above loop or in delay slot