diff --git a/src/hotspot/cpu/ppc/gc/shared/cardTableBarrierSetAssembler_ppc.cpp b/src/hotspot/cpu/ppc/gc/shared/cardTableBarrierSetAssembler_ppc.cpp new file mode 100644 index 0000000..ff73d99 --- /dev/null +++ b/src/hotspot/cpu/ppc/gc/shared/cardTableBarrierSetAssembler_ppc.cpp @@ -0,0 +1,74 @@ +/* + * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2018, SAP SE. All rights reserved. + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * This code is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License version 2 only, as + * published by the Free Software Foundation. + * + * This code is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * version 2 for more details (a copy is included in the LICENSE file that + * accompanied this code). + * + * You should have received a copy of the GNU General Public License version + * 2 along with this work; if not, write to the Free Software Foundation, + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. + * + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA + * or visit www.oracle.com if you need additional information or have any + * questions. + * + */ + +#include "precompiled.hpp" +#include "asm/macroAssembler.inline.hpp" +#include "gc/shared/barrierSet.hpp" +#include "gc/shared/cardTable.hpp" +#include "gc/shared/cardTableBarrierSet.hpp" +#include "gc/shared/cardTableBarrierSetAssembler.hpp" +#include "gc/shared/collectedHeap.hpp" +#include "interpreter/interp_masm.hpp" + +#define __ masm-> + +#ifdef PRODUCT +#define BLOCK_COMMENT(str) /* nothing */ +#else +#define BLOCK_COMMENT(str) __ block_comment(str) +#endif + +#define BIND(label) bind(label); BLOCK_COMMENT(#label ":") + +void CardTableBarrierSetAssembler::gen_write_ref_array_post_barrier(MacroAssembler* masm, DecoratorSet decorators, Register addr, + Register count, Register preserve) { + CardTableBarrierSet* ctbs = barrier_set_cast(Universe::heap()->barrier_set()); + CardTable* ct = ctbs->card_table(); + assert(sizeof(*ct->byte_map_base()) == sizeof(jbyte), "adjust this code"); + assert_different_registers(addr, count, R0); + + Label Lskip_loop, Lstore_loop; + + if (UseConcMarkSweepGC) { __ membar(Assembler::StoreStore); } + + __ sldi_(count, count, LogBytesPerHeapOop); + __ beq(CCR0, Lskip_loop); // zero length + __ addi(count, count, -BytesPerHeapOop); + __ add(count, addr, count); + // Use two shifts to clear out those low order two bits! (Cannot opt. into 1.) + __ srdi(addr, addr, CardTable::card_shift); + __ srdi(count, count, CardTable::card_shift); + __ subf(count, addr, count); + __ add_const_optimized(addr, addr, (address)ct->byte_map_base(), R0); + __ addi(count, count, 1); + __ li(R0, 0); + __ mtctr(count); + // Byte store loop + __ bind(Lstore_loop); + __ stb(R0, 0, addr); + __ addi(addr, addr, 1); + __ bdnz(Lstore_loop); + __ bind(Lskip_loop); +}