| /* |
| * 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 OS_CPU_WINDOWS_X86_VM_COPY_WINDOWS_X86_INLINE_HPP |
| #define OS_CPU_WINDOWS_X86_VM_COPY_WINDOWS_X86_INLINE_HPP |
| |
| 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) { |
| #ifdef AMD64 |
| 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; |
| } |
| #else |
| (void)memcpy(to, from, count * HeapWordSize); |
| #endif // AMD64 |
| } |
| |
| 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) { |
| pd_conjoint_bytes(from, to, 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 AMD64 |
| assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size"); |
| pd_conjoint_oops_atomic((oop*)from, (oop*)to, count); |
| #else |
| // Guarantee use of fild/fistp or xmm regs via some asm code, because compilers won't. |
| __asm { |
| mov eax, from; |
| mov edx, to; |
| mov ecx, count; |
| cmp eax, edx; |
| jbe downtest; |
| jmp uptest; |
| up: |
| fild qword ptr [eax]; |
| fistp qword ptr [edx]; |
| add eax, 8; |
| add edx, 8; |
| uptest: |
| sub ecx, 1; |
| jge up; |
| jmp done; |
| down: |
| fild qword ptr [eax][ecx*8]; |
| fistp qword ptr [edx][ecx*8]; |
| downtest: |
| sub ecx, 1; |
| jge down; |
| done:; |
| } |
| #endif // AMD64 |
| } |
| |
| 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) { |
| #ifdef AMD64 |
| pd_conjoint_bytes_atomic(from, to, count); |
| #else |
| pd_conjoint_bytes(from, to, count); |
| #endif // AMD64 |
| } |
| |
| 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); |
| } |
| |
| #endif // OS_CPU_WINDOWS_X86_VM_COPY_WINDOWS_X86_INLINE_HPP |