copy_zero.hpp revision 1472:c18cbe5936b8
1/* 2 * Copyright (c) 2003, 2004, Oracle and/or its affiliates. All rights reserved. 3 * Copyright 2007 Red Hat, Inc. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26// Inline functions for memory copy and fill. 27 28static void pd_conjoint_words(HeapWord* from, HeapWord* to, size_t count) { 29 memmove(to, from, count * HeapWordSize); 30} 31 32static void pd_disjoint_words(HeapWord* from, HeapWord* to, size_t count) { 33 switch (count) { 34 case 8: to[7] = from[7]; 35 case 7: to[6] = from[6]; 36 case 6: to[5] = from[5]; 37 case 5: to[4] = from[4]; 38 case 4: to[3] = from[3]; 39 case 3: to[2] = from[2]; 40 case 2: to[1] = from[1]; 41 case 1: to[0] = from[0]; 42 case 0: break; 43 default: 44 memcpy(to, from, count * HeapWordSize); 45 break; 46 } 47} 48 49static void pd_disjoint_words_atomic(HeapWord* from, 50 HeapWord* to, 51 size_t count) { 52 switch (count) { 53 case 8: to[7] = from[7]; 54 case 7: to[6] = from[6]; 55 case 6: to[5] = from[5]; 56 case 5: to[4] = from[4]; 57 case 4: to[3] = from[3]; 58 case 3: to[2] = from[2]; 59 case 2: to[1] = from[1]; 60 case 1: to[0] = from[0]; 61 case 0: break; 62 default: 63 while (count-- > 0) { 64 *to++ = *from++; 65 } 66 break; 67 } 68} 69 70static void pd_aligned_conjoint_words(HeapWord* from, 71 HeapWord* to, 72 size_t count) { 73 memmove(to, from, count * HeapWordSize); 74} 75 76static void pd_aligned_disjoint_words(HeapWord* from, 77 HeapWord* to, 78 size_t count) { 79 pd_disjoint_words(from, to, count); 80} 81 82static void pd_conjoint_bytes(void* from, void* to, size_t count) { 83 memmove(to, from, count); 84} 85 86static void pd_conjoint_bytes_atomic(void* from, void* to, size_t count) { 87 memmove(to, from, count); 88} 89 90static void pd_conjoint_jshorts_atomic(jshort* from, jshort* to, size_t count) { 91 _Copy_conjoint_jshorts_atomic(from, to, count); 92} 93 94static void pd_conjoint_jints_atomic(jint* from, jint* to, size_t count) { 95 _Copy_conjoint_jints_atomic(from, to, count); 96} 97 98static void pd_conjoint_jlongs_atomic(jlong* from, jlong* to, size_t count) { 99 _Copy_conjoint_jlongs_atomic(from, to, count); 100} 101 102static void pd_conjoint_oops_atomic(oop* from, oop* to, size_t count) { 103#ifdef _LP64 104 assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size"); 105 _Copy_conjoint_jlongs_atomic((jlong*)from, (jlong*)to, count); 106#else 107 assert(BytesPerInt == BytesPerOop, "jints and oops must be the same size"); 108 _Copy_conjoint_jints_atomic((jint*)from, (jint*)to, count); 109#endif // _LP64 110} 111 112static void pd_arrayof_conjoint_bytes(HeapWord* from, 113 HeapWord* to, 114 size_t count) { 115 _Copy_arrayof_conjoint_bytes(from, to, count); 116} 117 118static void pd_arrayof_conjoint_jshorts(HeapWord* from, 119 HeapWord* to, 120 size_t count) { 121 _Copy_arrayof_conjoint_jshorts(from, to, count); 122} 123 124static void pd_arrayof_conjoint_jints(HeapWord* from, 125 HeapWord* to, 126 size_t count) { 127 _Copy_arrayof_conjoint_jints(from, to, count); 128} 129 130static void pd_arrayof_conjoint_jlongs(HeapWord* from, 131 HeapWord* to, 132 size_t count) { 133 _Copy_arrayof_conjoint_jlongs(from, to, count); 134} 135 136static void pd_arrayof_conjoint_oops(HeapWord* from, 137 HeapWord* to, 138 size_t count) { 139#ifdef _LP64 140 assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size"); 141 _Copy_arrayof_conjoint_jlongs(from, to, count); 142#else 143 assert(BytesPerInt == BytesPerOop, "jints and oops must be the same size"); 144 _Copy_arrayof_conjoint_jints(from, to, count); 145#endif // _LP64 146} 147 148static void pd_fill_to_words(HeapWord* tohw, size_t count, juint value) { 149#ifdef _LP64 150 julong* to = (julong*) tohw; 151 julong v = ((julong) value << 32) | value; 152#else 153 juint* to = (juint*) tohw; 154 juint v = value; 155#endif // _LP64 156 157 while (count-- > 0) { 158 *to++ = v; 159 } 160} 161 162static void pd_fill_to_aligned_words(HeapWord* tohw, 163 size_t count, 164 juint value) { 165 pd_fill_to_words(tohw, count, value); 166} 167 168static void pd_fill_to_bytes(void* to, size_t count, jubyte value) { 169 memset(to, value, count); 170} 171 172static void pd_zero_to_words(HeapWord* tohw, size_t count) { 173 pd_fill_to_words(tohw, count, 0); 174} 175 176static void pd_zero_to_bytes(void* to, size_t count) { 177 memset(to, 0, count); 178} 179