Mercurial > hg > graal-compiler
diff src/cpu/sparc/vm/stubGenerator_sparc.cpp @ 3892:baf763f388e6
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 | 3d42f82cd811 |
| children | 2f9b79ddb05c |
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--- a/src/cpu/sparc/vm/stubGenerator_sparc.cpp Thu Aug 25 20:29:30 2011 -0700 +++ b/src/cpu/sparc/vm/stubGenerator_sparc.cpp Fri Aug 26 08:52:22 2011 -0700 @@ -3069,6 +3069,34 @@ return start; } + // + // Generate stub for heap zeroing. + // "to" address is aligned to jlong (8 bytes). + // + // Arguments for generated stub: + // to: O0 + // count: O1 treated as signed (count of HeapWord) + // count could be 0 + // + address generate_zero_aligned_words(const char* name) { + __ align(CodeEntryAlignment); + StubCodeMark mark(this, "StubRoutines", name); + address start = __ pc(); + + const Register to = O0; // source array address + const Register count = O1; // HeapWords count + const Register temp = O2; // scratch + + Label Ldone; + __ sllx(count, LogHeapWordSize, count); // to bytes count + // Use BIS for zeroing + __ bis_zeroing(to, count, temp, Ldone); + __ bind(Ldone); + __ retl(); + __ delayed()->nop(); + return start; +} + void generate_arraycopy_stubs() { address entry; address entry_jbyte_arraycopy; @@ -3195,6 +3223,10 @@ StubRoutines::_arrayof_jbyte_fill = generate_fill(T_BYTE, true, "arrayof_jbyte_fill"); StubRoutines::_arrayof_jshort_fill = generate_fill(T_SHORT, true, "arrayof_jshort_fill"); StubRoutines::_arrayof_jint_fill = generate_fill(T_INT, true, "arrayof_jint_fill"); + + if (UseBlockZeroing) { + StubRoutines::_zero_aligned_words = generate_zero_aligned_words("zero_aligned_words"); + } } void generate_initial() {