1 /*
  2  * Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved.
  3  * Copyright (c) 2014, Red Hat Inc. All rights reserved.
  4  * Copyright (c) 2020, 2022, Huawei Technologies Co., Ltd. All rights reserved.
  5  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  6  *
  7  * This code is free software; you can redistribute it and/or modify it
  8  * under the terms of the GNU General Public License version 2 only, as
  9  * published by the Free Software Foundation.
 10  *
 11  * This code is distributed in the hope that it will be useful, but WITHOUT
 12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 14  * version 2 for more details (a copy is included in the LICENSE file that
 15  * accompanied this code).
 16  *
 17  * You should have received a copy of the GNU General Public License version
 18  * 2 along with this work; if not, write to the Free Software Foundation,
 19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 20  *
 21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 22  * or visit www.oracle.com if you need additional information or have any
 23  * questions.
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 25  */
 26 
 27 #ifndef CPU_RISCV_COPY_RISCV_HPP
 28 #define CPU_RISCV_COPY_RISCV_HPP
 29 
 30 #include OS_CPU_HEADER(copy)
 31 
 32 static void pd_fill_to_words(HeapWord* tohw, size_t count, juint value) {
 33   julong* to = (julong*) tohw;
 34   julong  v  = ((julong) value << 32) | value;
 35   while (count-- > 0) {
 36     *to++ = v;
 37   }
 38 }
 39 
 40 static void pd_fill_to_aligned_words(HeapWord* tohw, size_t count, juint value) {
 41   pd_fill_to_words(tohw, count, value);
 42 }
 43 
 44 static void pd_fill_to_bytes(void* to, size_t count, jubyte value) {
 45   (void)memset(to, value, count);
 46 }
 47 
 48 static void pd_zero_to_words(HeapWord* tohw, size_t count) {
 49   pd_fill_to_words(tohw, count, 0);
 50 }
 51 
 52 static void pd_zero_to_bytes(void* to, size_t count) {
 53   (void)memset(to, 0, count);
 54 }
 55 
 56 static void pd_conjoint_words(const HeapWord* from, HeapWord* to, size_t count) {
 57   (void)memmove(to, from, count * HeapWordSize);
 58 }
 59 
 60 static void pd_disjoint_words(const HeapWord* from, HeapWord* to, size_t count) {
 61   switch (count) {
 62     case 8:  to[7] = from[7];   // fall through
 63     case 7:  to[6] = from[6];   // fall through
 64     case 6:  to[5] = from[5];   // fall through
 65     case 5:  to[4] = from[4];   // fall through
 66     case 4:  to[3] = from[3];   // fall through
 67     case 3:  to[2] = from[2];   // fall through
 68     case 2:  to[1] = from[1];   // fall through
 69     case 1:  to[0] = from[0];   // fall through
 70     case 0:  break;
 71     default:
 72       memcpy(to, from, count * HeapWordSize);
 73       break;
 74   }
 75 }
 76 
 77 static void pd_disjoint_words_atomic(const HeapWord* from, HeapWord* to, size_t count) {
 78   shared_disjoint_words_atomic(from, to, count);
 79 }
 80 
 81 static void pd_aligned_conjoint_words(const HeapWord* from, HeapWord* to, size_t count) {
 82   pd_conjoint_words(from, to, count);
 83 }
 84 
 85 static void pd_aligned_disjoint_words(const HeapWord* from, HeapWord* to, size_t count) {
 86   pd_disjoint_words(from, to, count);
 87 }
 88 
 89 static void pd_conjoint_bytes(const void* from, void* to, size_t count) {
 90   (void)memmove(to, from, count);
 91 }
 92 
 93 static void pd_conjoint_bytes_atomic(const void* from, void* to, size_t count) {
 94   pd_conjoint_bytes(from, to, count);
 95 }
 96 
 97 static void pd_conjoint_jshorts_atomic(const jshort* from, jshort* to, size_t count) {
 98   _Copy_conjoint_jshorts_atomic(from, to, count);
 99 }
100 
101 static void pd_conjoint_jints_atomic(const jint* from, jint* to, size_t count) {
102   _Copy_conjoint_jints_atomic(from, to, count);
103 }
104 
105 static void pd_conjoint_jlongs_atomic(const jlong* from, jlong* to, size_t count) {
106   _Copy_conjoint_jlongs_atomic(from, to, count);
107 }
108 
109 static void pd_conjoint_oops_atomic(const oop* from, oop* to, size_t count) {
110   assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size.");
111   _Copy_conjoint_jlongs_atomic((const jlong*)from, (jlong*)to, count);
112 }
113 
114 static void pd_arrayof_conjoint_bytes(const HeapWord* from, HeapWord* to, size_t count) {
115   _Copy_arrayof_conjoint_bytes(from, to, count);
116 }
117 
118 static void pd_arrayof_conjoint_jshorts(const HeapWord* from, HeapWord* to, size_t count) {
119   _Copy_arrayof_conjoint_jshorts(from, to, count);
120 }
121 
122 static void pd_arrayof_conjoint_jints(const HeapWord* from, HeapWord* to, size_t count) {
123   _Copy_arrayof_conjoint_jints(from, to, count);
124 }
125 
126 static void pd_arrayof_conjoint_jlongs(const HeapWord* from, HeapWord* to, size_t count) {
127   _Copy_arrayof_conjoint_jlongs(from, to, count);
128 }
129 
130 static void pd_arrayof_conjoint_oops(const HeapWord* from, HeapWord* to, size_t count) {
131   assert(!UseCompressedOops, "foo!");
132   assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size");
133   _Copy_arrayof_conjoint_jlongs(from, to, count);
134 }
135 
136 #endif // CPU_RISCV_COPY_RISCV_HPP