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src/cpu/x86/vm/copy_x86.hpp@2649e5276dd7 (annotated)

src/cpu/x86/vm/copy_x86.hpp

Tue, 14 Oct 2008 15:10:26 -0700

author

kvn

date

Tue, 14 Oct 2008 15:10:26 -0700

changeset 840

2649e5276dd7

parent 435

a61af66fc99e

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6532536: Optimize arraycopy stubs for Intel cpus
Summary: Use SSE2 movdqu in arraycopy stubs on newest Intel's cpus
Reviewed-by: rasbold

duke@435	1	/*
duke@435	2	* Copyright 2003-2004 Sun Microsystems, Inc. All Rights Reserved.
duke@435	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435	4	*
duke@435	5	* This code is free software; you can redistribute it and/or modify it
duke@435	6	* under the terms of the GNU General Public License version 2 only, as
duke@435	7	* published by the Free Software Foundation.
duke@435	8	*
duke@435	9	* This code is distributed in the hope that it will be useful, but WITHOUT
duke@435	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
duke@435	12	* version 2 for more details (a copy is included in the LICENSE file that
duke@435	13	* accompanied this code).
duke@435	14	*
duke@435	15	* You should have received a copy of the GNU General Public License version
duke@435	16	* 2 along with this work; if not, write to the Free Software Foundation,
duke@435	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435	18	*
duke@435	19	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
duke@435	20	* CA 95054 USA or visit www.sun.com if you need additional information or
duke@435	21	* have any questions.
duke@435	22	*
duke@435	23	*/
duke@435	24
duke@435	25	// Inline functions for memory copy and fill.
duke@435	26
duke@435	27	// Contains inline asm implementations
duke@435	28	#include "incls/_copy_pd.inline.hpp.incl"
duke@435	29
duke@435	30	static void pd_fill_to_words(HeapWord* tohw, size_t count, juint value) {
duke@435	31	#ifdef AMD64
duke@435	32	julong* to = (julong*) tohw;
duke@435	33	julong v = ((julong) value << 32) | value;
duke@435	34	while (count-- > 0) {
duke@435	35	*to++ = v;
duke@435	36	}
duke@435	37	#else
duke@435	38	juint* to = (juint*)tohw;
duke@435	39	count *= HeapWordSize / BytesPerInt;
duke@435	40	while (count-- > 0) {
duke@435	41	*to++ = value;
duke@435	42	}
duke@435	43	#endif // AMD64
duke@435	44	}
duke@435	45
duke@435	46	static void pd_fill_to_aligned_words(HeapWord* tohw, size_t count, juint value) {
duke@435	47	pd_fill_to_words(tohw, count, value);
duke@435	48	}
duke@435	49
duke@435	50	static void pd_fill_to_bytes(void* to, size_t count, jubyte value) {
duke@435	51	(void)memset(to, value, count);
duke@435	52	}
duke@435	53
duke@435	54	static void pd_zero_to_words(HeapWord* tohw, size_t count) {
duke@435	55	pd_fill_to_words(tohw, count, 0);
duke@435	56	}
duke@435	57
duke@435	58	static void pd_zero_to_bytes(void* to, size_t count) {
duke@435	59	(void)memset(to, 0, count);
duke@435	60	}