1 /* 2 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 * 23 */ 24 25 #include "precompiled.hpp" 26 #include "asm/macroAssembler.inline.hpp" 27 #include "gc/shared/modRefBarrierSetAssembler.hpp" 28 29 #define __ masm-> 30 31 void ModRefBarrierSetAssembler::arraycopy_prologue(MacroAssembler* masm, DecoratorSet decorators, BasicType type, 32 Register src, Register dst, Register count) { 33 bool checkcast = (decorators & ARRAYCOPY_CHECKCAST) != 0; 34 bool disjoint = (decorators & ARRAYCOPY_DISJOINT) != 0; 35 bool obj_int = type == T_OBJECT LP64_ONLY(&& UseCompressedOops); 36 37 if (type == T_OBJECT || type == T_ARRAY) { 38 #ifdef _LP64 39 if (!checkcast && !obj_int) { 40 // Save count for barrier 41 __ movptr(r11, count); 42 } else if (disjoint && obj_int) { 43 // Save dst in r11 in the disjoint case 44 __ movq(r11, dst); 45 } 46 #else 47 if (disjoint) { 48 __ mov(rdx, dst); // save 'to' 49 } 50 #endif 51 gen_write_ref_array_pre_barrier(masm, decorators, dst, count); 52 } 53 } 54 55 void ModRefBarrierSetAssembler::arraycopy_epilogue(MacroAssembler* masm, DecoratorSet decorators, BasicType type, 56 Register src, Register dst, Register count) { 57 bool checkcast = (decorators & ARRAYCOPY_CHECKCAST) != 0; 58 bool disjoint = (decorators & ARRAYCOPY_DISJOINT) != 0; 59 bool obj_int = type == T_OBJECT LP64_ONLY(&& UseCompressedOops); 60 Register tmp = rax; 61 62 if (type == T_OBJECT || type == T_ARRAY) { 63 #ifdef _LP64 64 if (!checkcast && !obj_int) { 65 // Save count for barrier 66 count = r11; 67 } else if (disjoint && obj_int) { 68 // Use the saved dst in the disjoint case 69 dst = r11; 70 } else if (checkcast) { 71 tmp = rscratch1; 72 } 73 #else 74 if (disjoint) { 75 __ mov(dst, rdx); // restore 'to' 76 } 77 #endif 78 gen_write_ref_array_post_barrier(masm, decorators, dst, count, tmp); 79 } 80 }