never@1445: /*
stefank@2314:  * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
never@1445:  * Copyright 2007 Red Hat, Inc.
never@1445:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
never@1445:  *
never@1445:  * This code is free software; you can redistribute it and/or modify it
never@1445:  * under the terms of the GNU General Public License version 2 only, as
never@1445:  * published by the Free Software Foundation.
never@1445:  *
never@1445:  * This code is distributed in the hope that it will be useful, but WITHOUT
never@1445:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
never@1445:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
never@1445:  * version 2 for more details (a copy is included in the LICENSE file that
never@1445:  * accompanied this code).
never@1445:  *
never@1445:  * You should have received a copy of the GNU General Public License version
never@1445:  * 2 along with this work; if not, write to the Free Software Foundation,
never@1445:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
never@1445:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
never@1445:  *
never@1445:  */
never@1445: 
stefank@2314: #ifndef CPU_ZERO_VM_COPY_ZERO_HPP
stefank@2314: #define CPU_ZERO_VM_COPY_ZERO_HPP
stefank@2314: 
never@1445: // Inline functions for memory copy and fill.
never@1445: 
never@1445: static void pd_conjoint_words(HeapWord* from, HeapWord* to, size_t count) {
never@1445:   memmove(to, from, count * HeapWordSize);
never@1445: }
never@1445: 
never@1445: static void pd_disjoint_words(HeapWord* from, HeapWord* to, size_t count) {
never@1445:   switch (count) {
never@1445:   case 8:  to[7] = from[7];
never@1445:   case 7:  to[6] = from[6];
never@1445:   case 6:  to[5] = from[5];
never@1445:   case 5:  to[4] = from[4];
never@1445:   case 4:  to[3] = from[3];
never@1445:   case 3:  to[2] = from[2];
never@1445:   case 2:  to[1] = from[1];
never@1445:   case 1:  to[0] = from[0];
never@1445:   case 0:  break;
never@1445:   default:
never@1445:     memcpy(to, from, count * HeapWordSize);
never@1445:     break;
never@1445:   }
never@1445: }
never@1445: 
never@1445: static void pd_disjoint_words_atomic(HeapWord* from,
never@1445:                                      HeapWord* to,
never@1445:                                      size_t count) {
never@1445:   switch (count) {
never@1445:   case 8:  to[7] = from[7];
never@1445:   case 7:  to[6] = from[6];
never@1445:   case 6:  to[5] = from[5];
never@1445:   case 5:  to[4] = from[4];
never@1445:   case 4:  to[3] = from[3];
never@1445:   case 3:  to[2] = from[2];
never@1445:   case 2:  to[1] = from[1];
never@1445:   case 1:  to[0] = from[0];
never@1445:   case 0:  break;
never@1445:   default:
never@1445:     while (count-- > 0) {
never@1445:       *to++ = *from++;
never@1445:     }
never@1445:     break;
never@1445:   }
never@1445: }
never@1445: 
never@1445: static void pd_aligned_conjoint_words(HeapWord* from,
never@1445:                                       HeapWord* to,
never@1445:                                       size_t count) {
never@1445:   memmove(to, from, count * HeapWordSize);
never@1445: }
never@1445: 
never@1445: static void pd_aligned_disjoint_words(HeapWord* from,
never@1445:                                       HeapWord* to,
never@1445:                                       size_t count) {
never@1445:   pd_disjoint_words(from, to, count);
never@1445: }
never@1445: 
never@1445: static void pd_conjoint_bytes(void* from, void* to, size_t count) {
never@1445:   memmove(to, from, count);
never@1445: }
never@1445: 
never@1445: static void pd_conjoint_bytes_atomic(void* from, void* to, size_t count) {
never@1445:   memmove(to, from, count);
never@1445: }
never@1445: 
never@1445: static void pd_conjoint_jshorts_atomic(jshort* from, jshort* to, size_t count) {
never@1445:   _Copy_conjoint_jshorts_atomic(from, to, count);
never@1445: }
never@1445: 
never@1445: static void pd_conjoint_jints_atomic(jint* from, jint* to, size_t count) {
never@1445:   _Copy_conjoint_jints_atomic(from, to, count);
never@1445: }
never@1445: 
never@1445: static void pd_conjoint_jlongs_atomic(jlong* from, jlong* to, size_t count) {
never@1445:   _Copy_conjoint_jlongs_atomic(from, to, count);
never@1445: }
never@1445: 
never@1445: static void pd_conjoint_oops_atomic(oop* from, oop* to, size_t count) {
never@1445: #ifdef _LP64
never@1445:   assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size");
never@1445:   _Copy_conjoint_jlongs_atomic((jlong*)from, (jlong*)to, count);
never@1445: #else
never@1445:   assert(BytesPerInt == BytesPerOop, "jints and oops must be the same size");
never@1445:   _Copy_conjoint_jints_atomic((jint*)from, (jint*)to, count);
never@1445: #endif // _LP64
never@1445: }
never@1445: 
never@1445: static void pd_arrayof_conjoint_bytes(HeapWord* from,
never@1445:                                       HeapWord* to,
never@1445:                                       size_t    count) {
never@1445:   _Copy_arrayof_conjoint_bytes(from, to, count);
never@1445: }
never@1445: 
never@1445: static void pd_arrayof_conjoint_jshorts(HeapWord* from,
never@1445:                                         HeapWord* to,
never@1445:                                         size_t    count) {
never@1445:   _Copy_arrayof_conjoint_jshorts(from, to, count);
never@1445: }
never@1445: 
never@1445: static void pd_arrayof_conjoint_jints(HeapWord* from,
never@1445:                                       HeapWord* to,
never@1445:                                       size_t    count) {
never@1445:   _Copy_arrayof_conjoint_jints(from, to, count);
never@1445: }
never@1445: 
never@1445: static void pd_arrayof_conjoint_jlongs(HeapWord* from,
never@1445:                                        HeapWord* to,
never@1445:                                        size_t    count) {
never@1445:   _Copy_arrayof_conjoint_jlongs(from, to, count);
never@1445: }
never@1445: 
never@1445: static void pd_arrayof_conjoint_oops(HeapWord* from,
never@1445:                                      HeapWord* to,
never@1445:                                      size_t    count) {
never@1445: #ifdef _LP64
never@1445:   assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size");
never@1445:   _Copy_arrayof_conjoint_jlongs(from, to, count);
never@1445: #else
never@1445:   assert(BytesPerInt == BytesPerOop, "jints and oops must be the same size");
never@1445:   _Copy_arrayof_conjoint_jints(from, to, count);
never@1445: #endif // _LP64
never@1445: }
never@1445: 
never@1445: static void pd_fill_to_words(HeapWord* tohw, size_t count, juint value) {
never@1445: #ifdef _LP64
never@1445:   julong* to = (julong*) tohw;
never@1445:   julong  v  = ((julong) value << 32) | value;
never@1445: #else
never@1445:   juint* to = (juint*) tohw;
never@1445:   juint  v  = value;
never@1445: #endif // _LP64
never@1445: 
never@1445:   while (count-- > 0) {
never@1445:     *to++ = v;
never@1445:   }
never@1445: }
never@1445: 
never@1445: static void pd_fill_to_aligned_words(HeapWord* tohw,
never@1445:                                      size_t    count,
never@1445:                                      juint     value) {
never@1445:   pd_fill_to_words(tohw, count, value);
never@1445: }
never@1445: 
never@1445: static void pd_fill_to_bytes(void* to, size_t count, jubyte value) {
never@1445:   memset(to, value, count);
never@1445: }
never@1445: 
never@1445: static void pd_zero_to_words(HeapWord* tohw, size_t count) {
never@1445:   pd_fill_to_words(tohw, count, 0);
never@1445: }
never@1445: 
never@1445: static void pd_zero_to_bytes(void* to, size_t count) {
never@1445:   memset(to, 0, count);
never@1445: }
stefank@2314: 
stefank@2314: #endif // CPU_ZERO_VM_COPY_ZERO_HPP