Mercurial > hg > truffle
diff src/cpu/sparc/vm/methodHandles_sparc.cpp @ 4979:18a5539bf19b
More diff vs hsx24 optimizations.
| author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
|---|---|
| date | Mon, 27 Feb 2012 21:43:51 +0100 |
| parents | 33df1aeaebbf |
| children | 957c266d8bc5 |
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--- a/src/cpu/sparc/vm/methodHandles_sparc.cpp Mon Feb 27 18:31:27 2012 +0100 +++ b/src/cpu/sparc/vm/methodHandles_sparc.cpp Mon Feb 27 21:43:51 2012 +0100 @@ -876,7 +876,14 @@ } #endif __ cmp_and_brx_short(bottom_reg, top_reg, Assembler::greaterEqualUnsigned, Assembler::pn, L_break); ->> + // work top down to bottom, copying contiguous data upwards + // In pseudo-code: + // while (--top >= bottom) *(top + distance) = *(top + 0); + RegisterOrConstant offset = __ argument_offset(positive_distance_in_slots, positive_distance_in_slots.register_or_noreg()); + __ BIND(L_loop); + __ sub(top_reg, wordSize, top_reg); + __ ld_ptr( Address(top_reg, 0 ), temp2_reg); + __ st_ptr(temp2_reg, Address(top_reg, offset) ); __ cmp_and_brx_short(top_reg, bottom_reg, Assembler::greaterUnsigned, Assembler::pt, L_loop); assert(Interpreter::stackElementSize == wordSize, "else change loop"); __ BIND(L_break);