jdk8-mips64-public/hotspot: src/cpu/sparc/vm/copy_sparc.hpp@f90c822e73f8 (annotated)

src/cpu/sparc/vm/copy_sparc.hpp@f90c822e73f8 (annotated)

src/cpu/sparc/vm/copy_sparc.hpp

Wed, 27 Apr 2016 01:25:04 +0800

author: aoqi
date: Wed, 27 Apr 2016 01:25:04 +0800
changeset 0: f90c822e73f8
child 6876: 710a3c8b516e
permissions: -rw-r--r--

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http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17

 /*
  * Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef CPU_SPARC_VM_COPY_SPARC_HPP
 #define CPU_SPARC_VM_COPY_SPARC_HPP
 // Inline functions for memory copy and fill.
 static void pd_conjoint_words(HeapWord* from, HeapWord* to, size_t count) {
   (void)memmove(to, from, count * HeapWordSize);
 }
 static void pd_disjoint_words(HeapWord* from, HeapWord* to, size_t count) {
   switch (count) {
   case 8:  to[7] = from[7];
   case 7:  to[6] = from[6];
   case 6:  to[5] = from[5];
   case 5:  to[4] = from[4];
   case 4:  to[3] = from[3];
   case 3:  to[2] = from[2];
   case 2:  to[1] = from[1];
   case 1:  to[0] = from[0];
   case 0:  break;
   default: (void)memcpy(to, from, count * HeapWordSize);
            break;
   }
 }
 static void pd_disjoint_words_atomic(HeapWord* from, HeapWord* to, size_t count) {
   switch (count) {
   case 8:  to[7] = from[7];
   case 7:  to[6] = from[6];
   case 6:  to[5] = from[5];
   case 5:  to[4] = from[4];
   case 4:  to[3] = from[3];
   case 3:  to[2] = from[2];
   case 2:  to[1] = from[1];
   case 1:  to[0] = from[0];
   case 0:  break;
   default: while (count-- > 0) {
              *to++ = *from++;
            }
            break;
   }
 }
 static void pd_aligned_conjoint_words(HeapWord* from, HeapWord* to, size_t count) {
   (void)memmove(to, from, count * HeapWordSize);
 }
 static void pd_aligned_disjoint_words(HeapWord* from, HeapWord* to, size_t count) {
   pd_disjoint_words(from, to, count);
 }
 static void pd_conjoint_bytes(void* from, void* to, size_t count) {
   (void)memmove(to, from, count);
 }
 static void pd_conjoint_bytes_atomic(void* from, void* to, size_t count) {
   (void)memmove(to, from, count);
 }
 static void pd_conjoint_jshorts_atomic(jshort* from, jshort* to, size_t count) {
   if (from > to) {
     while (count-- > 0) {
       // Copy forwards
       *to++ = *from++;
     }
   } else {
     from += count - 1;
     to   += count - 1;
     while (count-- > 0) {
       // Copy backwards
       *to-- = *from--;
     }
   }
 }
 static void pd_conjoint_jints_atomic(jint* from, jint* to, size_t count) {
   if (from > to) {
     while (count-- > 0) {
       // Copy forwards
       *to++ = *from++;
     }
   } else {
     from += count - 1;
     to   += count - 1;
     while (count-- > 0) {
       // Copy backwards
       *to-- = *from--;
     }
   }
 }
 static void pd_conjoint_jlongs_atomic(jlong* from, jlong* to, size_t count) {
 #ifdef _LP64
   assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size");
   pd_conjoint_oops_atomic((oop*)from, (oop*)to, count);
 #else
   // Guarantee use of ldd/std via some asm code, because compiler won't.
   // See solaris_sparc.il.
   _Copy_conjoint_jlongs_atomic(from, to, count);
 #endif
 }
 static void pd_conjoint_oops_atomic(oop* from, oop* to, size_t count) {
   // Do better than this: inline memmove body  NEEDS CLEANUP
   if (from > to) {
     while (count-- > 0) {
       // Copy forwards
       *to++ = *from++;
     }
   } else {
     from += count - 1;
     to   += count - 1;
     while (count-- > 0) {
       // Copy backwards
       *to-- = *from--;
     }
   }
 }
 static void pd_arrayof_conjoint_bytes(HeapWord* from, HeapWord* to, size_t count) {
   pd_conjoint_bytes_atomic(from, to, count);
 }
 static void pd_arrayof_conjoint_jshorts(HeapWord* from, HeapWord* to, size_t count) {
   pd_conjoint_jshorts_atomic((jshort*)from, (jshort*)to, count);
 }
 static void pd_arrayof_conjoint_jints(HeapWord* from, HeapWord* to, size_t count) {
   pd_conjoint_jints_atomic((jint*)from, (jint*)to, count);
 }
 static void pd_arrayof_conjoint_jlongs(HeapWord* from, HeapWord* to, size_t count) {
   pd_conjoint_jlongs_atomic((jlong*)from, (jlong*)to, count);
 }
 static void pd_arrayof_conjoint_oops(HeapWord* from, HeapWord* to, size_t count) {
   pd_conjoint_oops_atomic((oop*)from, (oop*)to, count);
 }
 static void pd_fill_to_words(HeapWord* tohw, size_t count, juint value) {
 #ifdef _LP64
   guarantee(mask_bits((uintptr_t)tohw, right_n_bits(LogBytesPerLong)) == 0,
          "unaligned fill words");
   julong* to = (julong*)tohw;
   julong  v  = ((julong)value << 32) | value;
   while (count-- > 0) {
     *to++ = v;
   }
 #else // _LP64
   juint* to = (juint*)tohw;
   while (count-- > 0) {
     *to++ = value;
   }
 #endif // _LP64
 }
 typedef void (*_zero_Fn)(HeapWord* to, size_t count);
 static void pd_fill_to_aligned_words(HeapWord* tohw, size_t count, juint value) {
   assert(MinObjAlignmentInBytes >= BytesPerLong, "need alternate implementation");
   if (value == 0 && UseBlockZeroing &&
       (count > (size_t)(BlockZeroingLowLimit >> LogHeapWordSize))) {
    // Call it only when block zeroing is used
    ((_zero_Fn)StubRoutines::zero_aligned_words())(tohw, count);
   } else {
    julong* to = (julong*)tohw;
    julong  v  = ((julong)value << 32) | value;
    // If count is odd, odd will be equal to 1 on 32-bit platform
    // and be equal to 0 on 64-bit platform.
    size_t odd = count % (BytesPerLong / HeapWordSize) ;
    size_t aligned_count = align_object_offset(count - odd) / HeapWordsPerLong;
    julong* end = ((julong*)tohw) + aligned_count - 1;
    while (to <= end) {
      DEBUG_ONLY(count -= BytesPerLong / HeapWordSize ;)
      *to++ = v;
    }
    assert(count == odd, "bad bounds on loop filling to aligned words");
    if (odd) {
      *((juint*)to) = value;
    }
   }
 }
 static void pd_fill_to_bytes(void* to, size_t count, jubyte value) {
   (void)memset(to, value, count);
 }
 static void pd_zero_to_words(HeapWord* tohw, size_t count) {
   pd_fill_to_words(tohw, count, 0);
 }
 static void pd_zero_to_bytes(void* to, size_t count) {
   (void)memset(to, 0, count);
 }
 #endif // CPU_SPARC_VM_COPY_SPARC_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/sparc/vm/copy_sparc.hpp@f90c822e73f8 (annotated)

src/cpu/sparc/vm/copy_sparc.hpp