1 /*
2 * Copyright (c) 2003, 2019, 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 #ifndef CPU_X86_COPY_X86_HPP
26 #define CPU_X86_COPY_X86_HPP
27
28 // Inline functions for memory copy and fill.
29
30 // Contains inline asm implementations
31 #include OS_CPU_HEADER_INLINE(copy)
32
pd_fill_to_words(HeapWord * tohw,size_t count,juint value)33 static void pd_fill_to_words(HeapWord* tohw, size_t count, juint value) {
34 #ifdef AMD64
35 julong* to = (julong*) tohw;
36 julong v = ((julong) value << 32) | value;
37 while (count-- > 0) {
38 *to++ = v;
39 }
40 #else
41 juint* to = (juint*)tohw;
42 count *= HeapWordSize / BytesPerInt;
43 while (count-- > 0) {
44 *to++ = value;
45 }
46 #endif // AMD64
47 }
48
pd_fill_to_aligned_words(HeapWord * tohw,size_t count,juint value)49 static void pd_fill_to_aligned_words(HeapWord* tohw, size_t count, juint value) {
50 pd_fill_to_words(tohw, count, value);
51 }
52
pd_fill_to_bytes(void * to,size_t count,jubyte value)53 static void pd_fill_to_bytes(void* to, size_t count, jubyte value) {
54 (void)memset(to, value, count);
55 }
56
pd_zero_to_words(HeapWord * tohw,size_t count)57 static void pd_zero_to_words(HeapWord* tohw, size_t count) {
58 pd_fill_to_words(tohw, count, 0);
59 }
60
pd_zero_to_bytes(void * to,size_t count)61 static void pd_zero_to_bytes(void* to, size_t count) {
62 (void)memset(to, 0, count);
63 }
64
65 #endif // CPU_X86_COPY_X86_HPP
66