Mercurial > hg > truffle
diff src/cpu/sparc/vm/c1_MacroAssembler_sparc.cpp @ 2002:ac637b7220d1
6985015: C1 needs to support compressed oops
Summary: This change implements compressed oops for C1 for x64 and sparc. The changes are mostly on the codegen level, with a few exceptions when we do access things outside of the heap that are uncompressed from the IR. Compressed oops are now also enabled with tiered.
Reviewed-by: twisti, kvn, never, phh
author | iveresov |
---|---|
date | Tue, 30 Nov 2010 23:23:40 -0800 |
parents | f95d63e2154a |
children | b1a2afa37ec4 |
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--- a/src/cpu/sparc/vm/c1_MacroAssembler_sparc.cpp Tue Nov 23 13:22:55 2010 -0800 +++ b/src/cpu/sparc/vm/c1_MacroAssembler_sparc.cpp Tue Nov 30 23:23:40 2010 -0800 @@ -40,7 +40,7 @@ const Register temp_reg = G3_scratch; // Note: needs more testing of out-of-line vs. inline slow case verify_oop(receiver); - ld_ptr(receiver, oopDesc::klass_offset_in_bytes(), temp_reg); + load_klass(receiver, temp_reg); cmp(temp_reg, iCache); brx(Assembler::equal, true, Assembler::pt, L); delayed()->nop(); @@ -185,9 +185,19 @@ } else { set((intx)markOopDesc::prototype(), t1); } - st_ptr(t1 , obj, oopDesc::mark_offset_in_bytes ()); - st_ptr(klass, obj, oopDesc::klass_offset_in_bytes ()); - if (len->is_valid()) st(len , obj, arrayOopDesc::length_offset_in_bytes()); + st_ptr(t1, obj, oopDesc::mark_offset_in_bytes()); + if (UseCompressedOops) { + // Save klass + mov(klass, t1); + encode_heap_oop_not_null(t1); + stw(t1, obj, oopDesc::klass_offset_in_bytes()); + } else { + st_ptr(klass, obj, oopDesc::klass_offset_in_bytes()); + } + if (len->is_valid()) st(len, obj, arrayOopDesc::length_offset_in_bytes()); + else if (UseCompressedOops) { + store_klass_gap(G0, obj); + } } @@ -235,7 +245,7 @@ Register t1, // temp register Register t2 // temp register ) { - const int hdr_size_in_bytes = instanceOopDesc::base_offset_in_bytes(); + const int hdr_size_in_bytes = instanceOopDesc::header_size() * HeapWordSize; initialize_header(obj, klass, noreg, t1, t2);