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/*
* Copyright 2003-2008 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
*/
// 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) {
// FIXME
(void)memmove(to, from, count << LogBytesPerShort);
}
static void pd_conjoint_jints_atomic(jint* from, jint* to, size_t count) {
// FIXME
(void)memmove(to, from, count << LogBytesPerInt);
}
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
}
static void pd_fill_to_aligned_words(HeapWord* tohw, size_t count, juint value) {
assert(MinObjAlignmentInBytes == BytesPerLong, "need alternate implementation");
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_size(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);
}
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