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

7063628: Use cbcond on T4
Summary: Add new short branch instruction to Hotspot sparc assembler.
Reviewed-by: never, twisti, jrose

     1 /*

     2  * Copyright (c) 2003, 2010, 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  */

    25 #ifndef CPU_SPARC_VM_COPY_SPARC_HPP

    26 #define CPU_SPARC_VM_COPY_SPARC_HPP

    28 // Inline functions for memory copy and fill.

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

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

    32 }

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

    35   switch (count) {

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

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

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

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

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

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

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

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

    44   case 0:  break;

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

    46            break;

    47   }

    48 }

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

    51   switch (count) {

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

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

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

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

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

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

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

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

    60   case 0:  break;

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

    62              *to++ = *from++;

    63            }

    64            break;

    65   }

    66 }

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

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

    70 }

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

    73   pd_disjoint_words(from, to, count);

    74 }

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

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

    78 }

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

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

    82 }

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

    85   // FIXME

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

    87 }

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

    90   // FIXME

    91   (void)memmove(to, from, count << LogBytesPerInt);

    92 }

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

    95 #ifdef _LP64

    96   assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size");

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

    98 #else

    99   // Guarantee use of ldd/std via some asm code, because compiler won't.

   100   // See solaris_sparc.il.

   101   _Copy_conjoint_jlongs_atomic(from, to, count);

   102 #endif

   103 }

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

   106   // Do better than this: inline memmove body  NEEDS CLEANUP

   107   if (from > to) {

   108     while (count-- > 0) {

   109       // Copy forwards

   110       *to++ = *from++;

   111     }

   112   } else {

   113     from += count - 1;

   114     to   += count - 1;

   115     while (count-- > 0) {

   116       // Copy backwards

   117       *to-- = *from--;

   118     }

   119   }

   120 }

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

   123   pd_conjoint_bytes_atomic(from, to, count);

   124 }

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

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

   128 }

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

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

   132 }

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

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

   136 }

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

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

   140 }

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

   143 #ifdef _LP64

   144   guarantee(mask_bits((uintptr_t)tohw, right_n_bits(LogBytesPerLong)) == 0,

   145          "unaligned fill words");

   146   julong* to = (julong*)tohw;

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

   148   while (count-- > 0) {

   149     *to++ = v;

   150   }

   151 #else // _LP64

   152   juint* to = (juint*)tohw;

   153   while (count-- > 0) {

   154     *to++ = value;

   155   }

   156 #endif // _LP64

   157 }

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

   160   assert(MinObjAlignmentInBytes >= BytesPerLong, "need alternate implementation");

   162    julong* to = (julong*)tohw;

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

   164    // If count is odd, odd will be equal to 1 on 32-bit platform

   165    // and be equal to 0 on 64-bit platform.

   166    size_t odd = count % (BytesPerLong / HeapWordSize) ;

   168    size_t aligned_count = align_object_offset(count - odd) / HeapWordsPerLong;

   169    julong* end = ((julong*)tohw) + aligned_count - 1;

   170    while (to <= end) {

   171      DEBUG_ONLY(count -= BytesPerLong / HeapWordSize ;)

   172      *to++ = v;

   173    }

   174    assert(count == odd, "bad bounds on loop filling to aligned words");

   175    if (odd) {

   176      *((juint*)to) = value;

   178    }

   179 }

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

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

   183 }

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

   186   pd_fill_to_words(tohw, count, 0);

   187 }

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

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

   191 }

   193 #endif // CPU_SPARC_VM_COPY_SPARC_HPP

src/cpu/sparc/vm/copy_sparc.hpp@3d42f82cd811