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src/os_cpu/linux_zero/vm/os_linux_zero.hpp@3b687c53c266 (annotated)

src/os_cpu/linux_zero/vm/os_linux_zero.hpp

Thu, 18 Feb 2010 06:54:48 -0800

author

twisti

date

Thu, 18 Feb 2010 06:54:48 -0800

changeset 1701

3b687c53c266

parent 1445

354d3184f6b2

child 1907

c18cbe5936b8

permissions

-rw-r--r--

6927165: Zero S/390 fixes
Summary: Fixes two failures on 31-bit S/390.
Reviewed-by: twisti
Contributed-by: Gary Benson <gbenson@redhat.com>

never@1445	1	/*
never@1445	2	* Copyright 2003-2004 Sun Microsystems, Inc. All Rights Reserved.
twisti@1701	3	* Copyright 2007, 2008, 2010 Red Hat, Inc.
never@1445	4	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
never@1445	5	*
never@1445	6	* This code is free software; you can redistribute it and/or modify it
never@1445	7	* under the terms of the GNU General Public License version 2 only, as
never@1445	8	* published by the Free Software Foundation.
never@1445	9	*
never@1445	10	* This code is distributed in the hope that it will be useful, but WITHOUT
never@1445	11	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
never@1445	12	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
never@1445	13	* version 2 for more details (a copy is included in the LICENSE file that
never@1445	14	* accompanied this code).
never@1445	15	*
never@1445	16	* You should have received a copy of the GNU General Public License version
never@1445	17	* 2 along with this work; if not, write to the Free Software Foundation,
never@1445	18	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
never@1445	19	*
never@1445	20	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
never@1445	21	* CA 95054 USA or visit www.sun.com if you need additional information or
never@1445	22	* have any questions.
never@1445	23	*
never@1445	24	*/
never@1445	25
never@1445	26	static void setup_fpu() {}
never@1445	27
never@1445	28	static bool is_allocatable(size_t bytes);
never@1445	29
never@1445	30	// Used to register dynamic code cache area with the OS
never@1445	31	// Note: Currently only used in 64 bit Windows implementations
never@1445	32	static bool register_code_area(char *low, char *high) { return true; }
never@1445	33
never@1445	34	// Atomically copy 64 bits of data
never@1445	35	static void atomic_copy64(volatile void *src, volatile void *dst) {
never@1445	36	#if defined(PPC) && !defined(_LP64)
never@1445	37	double tmp;
never@1445	38	asm volatile ("lfd %0, 0(%1)\n"
never@1445	39	"stfd %0, 0(%2)\n"
never@1445	40	: "=f"(tmp)
never@1445	41	: "b"(src), "b"(dst));
twisti@1701	42	#elif defined(S390) && !defined(_LP64)
twisti@1701	43	double tmp;
twisti@1701	44	asm volatile ("ld %0, 0(%1)\n"
twisti@1701	45	"std %0, 0(%2)\n"
twisti@1701	46	: "=r"(tmp)
twisti@1701	47	: "a"(src), "a"(dst));
never@1445	48	#else
never@1445	49	*(jlong *) dst = *(jlong *) src;
twisti@1701	50	#endif
never@1445	51	}