Mercurial > hg > graal-compiler
diff src/os_cpu/windows_x86/vm/copy_windows_x86.inline.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/os_cpu/windows_x86/vm/copy_windows_x86.inline.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,166 @@ +/* + * Copyright 2003-2004 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. + * + */ + +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) { + // 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 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); +}