jdk8-mips64-public/hotspot: src/cpu/ppc/vm/copy

     1 /*

     2  * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.

     3  * Copyright 2012, 2013 SAP AG. All rights reserved.

     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

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    26 #ifndef CPU_PPC_VM_COPY_PPC_HPP

    27 #define CPU_PPC_VM_COPY_PPC_HPP

    29 #ifndef PPC64

    30 #error "copy currently only implemented for PPC64"

    31 #endif

    33 // Inline functions for memory copy and fill.

    35 static void pd_conjoint_words(HeapWord* from, HeapWord* to, size_t count) {

    36   (void)memmove(to, from, count * HeapWordSize);

    37 }

    39 static void pd_disjoint_words(HeapWord* from, HeapWord* to, size_t count) {

    40   switch (count) {

    41   case 8:  to[7] = from[7];

    42   case 7:  to[6] = from[6];

    43   case 6:  to[5] = from[5];

    44   case 5:  to[4] = from[4];

    45   case 4:  to[3] = from[3];

    46   case 3:  to[2] = from[2];

    47   case 2:  to[1] = from[1];

    48   case 1:  to[0] = from[0];

    49   case 0:  break;

    50   default: (void)memcpy(to, from, count * HeapWordSize);

    51            break;

    52   }

    53 }

    55 static void pd_disjoint_words_atomic(HeapWord* from, HeapWord* to, size_t count) {

    56   switch (count) {

    57   case 8:  to[7] = from[7];

    58   case 7:  to[6] = from[6];

    59   case 6:  to[5] = from[5];

    60   case 5:  to[4] = from[4];

    61   case 4:  to[3] = from[3];

    62   case 3:  to[2] = from[2];

    63   case 2:  to[1] = from[1];

    64   case 1:  to[0] = from[0];

    65   case 0:  break;

    66   default: while (count-- > 0) {

    67              *to++ = *from++;

    68            }

    69            break;

    70   }

    71 }

    73 static void pd_aligned_conjoint_words(HeapWord* from, HeapWord* to, size_t count) {

    74   (void)memmove(to, from, count * HeapWordSize);

    75 }

    77 static void pd_aligned_disjoint_words(HeapWord* from, HeapWord* to, size_t count) {

    78   pd_disjoint_words(from, to, count);

    79 }

    81 static void pd_conjoint_bytes(void* from, void* to, size_t count) {

    82   (void)memmove(to, from, count);

    83 }

    85 static void pd_conjoint_bytes_atomic(void* from, void* to, size_t count) {

    86   (void)memmove(to, from, count);

    87 }

    89 // Template for atomic, element-wise copy.

    90 template <class T>

    91 static void copy_conjoint_atomic(T* from, T* to, size_t count) {

    92   if (from > to) {

    93     while (count-- > 0) {

    94       // Copy forwards

    95       *to++ = *from++;

    96     }

    97   } else {

    98     from += count - 1;

    99     to   += count - 1;

   100     while (count-- > 0) {

   101       // Copy backwards

   102       *to-- = *from--;

   103     }

   104   }

   105 }

   107 static void pd_conjoint_jshorts_atomic(jshort* from, jshort* to, size_t count) {

   108   // TODO: contribute optimized version.

   109   copy_conjoint_atomic<jshort>(from, to, count);

   110 }

   112 static void pd_conjoint_jints_atomic(jint* from, jint* to, size_t count) {

   113   // TODO: contribute optimized version.

   114   copy_conjoint_atomic<jint>(from, to, count);

   115 }

   117 static void pd_conjoint_jlongs_atomic(jlong* from, jlong* to, size_t count) {

   118   copy_conjoint_atomic<jlong>(from, to, count);

   119 }

   121 static void pd_conjoint_oops_atomic(oop* from, oop* to, size_t count) {

   122   copy_conjoint_atomic<oop>(from, to, count);

   123 }

   125 static void pd_arrayof_conjoint_bytes(HeapWord* from, HeapWord* to, size_t count) {

   126   pd_conjoint_bytes_atomic(from, to, count);

   127 }

   129 static void pd_arrayof_conjoint_jshorts(HeapWord* from, HeapWord* to, size_t count) {

   130   // TODO: contribute optimized version.

   131   pd_conjoint_jshorts_atomic((jshort*)from, (jshort*)to, count);

   132 }

   134 static void pd_arrayof_conjoint_jints(HeapWord* from, HeapWord* to, size_t count) {

   135   // TODO: contribute optimized version.

   136   pd_conjoint_jints_atomic((jint*)from, (jint*)to, count);

   137 }

   139 static void pd_arrayof_conjoint_jlongs(HeapWord* from, HeapWord* to, size_t count) {

   140   pd_conjoint_jlongs_atomic((jlong*)from, (jlong*)to, count);

   141 }

   143 static void pd_arrayof_conjoint_oops(HeapWord* from, HeapWord* to, size_t count) {

   144   pd_conjoint_oops_atomic((oop*)from, (oop*)to, count);

   145 }

   147 static void pd_fill_to_words(HeapWord* tohw, size_t count, juint value) {

   148   julong* to = (julong*)tohw;

   149   julong  v  = ((julong)value << 32) | value;

   150   while (count-- > 0) {

   151     *to++ = v;

   152   }

   153 }

   155 static void pd_fill_to_aligned_words(HeapWord* tohw, size_t count, juint value) {

   156   pd_fill_to_words(tohw, count, value);

   157 }

   159 static void pd_fill_to_bytes(void* to, size_t count, jubyte value) {

   160   (void)memset(to, value, count);

   161 }

   163 static void pd_zero_to_words(HeapWord* tohw, size_t count) {

   164   pd_fill_to_words(tohw, count, 0);

   165 }

   167 static void pd_zero_to_bytes(void* to, size_t count) {

   168   (void)memset(to, 0, count);

   169 }

   171 #endif // CPU_PPC_VM_COPY_PPC_HPP

src/cpu/ppc/vm/copy_ppc.hpp@04ff2f6cd0eb