author | twisti |
Fri, 30 Nov 2012 15:23:16 -0800 | |
changeset 14626 | 0cf4eccf130f |
parent 10743 | 2ee610c1fe49 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2003, 2011, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#ifndef OS_CPU_WINDOWS_X86_VM_COPY_WINDOWS_X86_INLINE_HPP |
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#define OS_CPU_WINDOWS_X86_VM_COPY_WINDOWS_X86_INLINE_HPP |
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static void pd_conjoint_words(HeapWord* from, HeapWord* to, size_t count) { |
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(void)memmove(to, from, count * HeapWordSize); |
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} |
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static void pd_disjoint_words(HeapWord* from, HeapWord* to, size_t count) { |
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#ifdef AMD64 |
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switch (count) { |
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case 8: to[7] = from[7]; |
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case 7: to[6] = from[6]; |
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case 6: to[5] = from[5]; |
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case 5: to[4] = from[4]; |
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case 4: to[3] = from[3]; |
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case 3: to[2] = from[2]; |
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case 2: to[1] = from[1]; |
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case 1: to[0] = from[0]; |
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case 0: break; |
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default: |
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(void)memcpy(to, from, count * HeapWordSize); |
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break; |
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} |
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#else |
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(void)memcpy(to, from, count * HeapWordSize); |
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#endif // AMD64 |
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} |
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static void pd_disjoint_words_atomic(HeapWord* from, HeapWord* to, size_t count) { |
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switch (count) { |
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case 8: to[7] = from[7]; |
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case 7: to[6] = from[6]; |
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case 6: to[5] = from[5]; |
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case 5: to[4] = from[4]; |
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case 4: to[3] = from[3]; |
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case 3: to[2] = from[2]; |
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case 2: to[1] = from[1]; |
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case 1: to[0] = from[0]; |
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case 0: break; |
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default: while (count-- > 0) { |
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*to++ = *from++; |
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} |
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break; |
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} |
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} |
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static void pd_aligned_conjoint_words(HeapWord* from, HeapWord* to, size_t count) { |
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(void)memmove(to, from, count * HeapWordSize); |
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} |
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static void pd_aligned_disjoint_words(HeapWord* from, HeapWord* to, size_t count) { |
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pd_disjoint_words(from, to, count); |
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} |
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static void pd_conjoint_bytes(void* from, void* to, size_t count) { |
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(void)memmove(to, from, count); |
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} |
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static void pd_conjoint_bytes_atomic(void* from, void* to, size_t count) { |
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pd_conjoint_bytes(from, to, count); |
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} |
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static void pd_conjoint_jshorts_atomic(jshort* from, jshort* to, size_t count) { |
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if (from > to) { |
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while (count-- > 0) { |
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// Copy forwards |
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*to++ = *from++; |
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} |
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} else { |
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from += count - 1; |
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to += count - 1; |
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while (count-- > 0) { |
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// Copy backwards |
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*to-- = *from--; |
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} |
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} |
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} |
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static void pd_conjoint_jints_atomic(jint* from, jint* to, size_t count) { |
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if (from > to) { |
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while (count-- > 0) { |
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// Copy forwards |
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*to++ = *from++; |
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} |
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} else { |
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from += count - 1; |
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to += count - 1; |
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while (count-- > 0) { |
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// Copy backwards |
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*to-- = *from--; |
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} |
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} |
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} |
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static void pd_conjoint_jlongs_atomic(jlong* from, jlong* to, size_t count) { |
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#ifdef AMD64 |
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assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size"); |
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pd_conjoint_oops_atomic((oop*)from, (oop*)to, count); |
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#else |
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// Guarantee use of fild/fistp or xmm regs via some asm code, because compilers won't. |
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__asm { |
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mov eax, from; |
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mov edx, to; |
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mov ecx, count; |
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cmp eax, edx; |
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jbe downtest; |
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jmp uptest; |
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up: |
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fild qword ptr [eax]; |
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fistp qword ptr [edx]; |
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add eax, 8; |
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add edx, 8; |
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uptest: |
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sub ecx, 1; |
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jge up; |
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jmp done; |
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down: |
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fild qword ptr [eax][ecx*8]; |
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fistp qword ptr [edx][ecx*8]; |
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downtest: |
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sub ecx, 1; |
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jge down; |
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done:; |
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} |
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#endif // AMD64 |
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} |
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static void pd_conjoint_oops_atomic(oop* from, oop* to, size_t count) { |
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// Do better than this: inline memmove body NEEDS CLEANUP |
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if (from > to) { |
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while (count-- > 0) { |
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// Copy forwards |
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*to++ = *from++; |
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} |
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} else { |
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from += count - 1; |
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to += count - 1; |
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while (count-- > 0) { |
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// Copy backwards |
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*to-- = *from--; |
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} |
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} |
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} |
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static void pd_arrayof_conjoint_bytes(HeapWord* from, HeapWord* to, size_t count) { |
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#ifdef AMD64 |
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pd_conjoint_bytes_atomic(from, to, count); |
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#else |
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pd_conjoint_bytes(from, to, count); |
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#endif // AMD64 |
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} |
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static void pd_arrayof_conjoint_jshorts(HeapWord* from, HeapWord* to, size_t count) { |
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pd_conjoint_jshorts_atomic((jshort*)from, (jshort*)to, count); |
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} |
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static void pd_arrayof_conjoint_jints(HeapWord* from, HeapWord* to, size_t count) { |
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pd_conjoint_jints_atomic((jint*)from, (jint*)to, count); |
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} |
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static void pd_arrayof_conjoint_jlongs(HeapWord* from, HeapWord* to, size_t count) { |
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pd_conjoint_jlongs_atomic((jlong*)from, (jlong*)to, count); |
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} |
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static void pd_arrayof_conjoint_oops(HeapWord* from, HeapWord* to, size_t count) { |
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pd_conjoint_oops_atomic((oop*)from, (oop*)to, count); |
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} |
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#endif // OS_CPU_WINDOWS_X86_VM_COPY_WINDOWS_X86_INLINE_HPP |