view src/os_cpu/linux_sparc/vm/linux_sparc.s @ 20304:a22acf6d7598

8048112: G1 Full GC needs to support the case when the very first region is not available Summary: Refactor preparation for compaction during Full GC so that it lazily initializes the first compaction point. This also avoids problems later when the first region may not be committed. Also reviewed by K. Barrett. Reviewed-by: brutisso
author tschatzl
date Mon, 21 Jul 2014 10:00:31 +0200
parents 55fb97c4c58d
children 4ca6dc0799b6
line wrap: on
line source

#
# Copyright (c) 2005, 2013, 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.
#

    # Possibilities:
    # -- membar
    # -- CAS (SP + BIAS, G0, G0)
    # -- wr %g0, %asi

    .globl SpinPause
    .type   SpinPause,@function
    .align  32
SpinPause:      
    retl
    mov %g0, %o0

   .globl _Copy_conjoint_jlongs_atomic
   .type   _Copy_conjoint_jlongs_atomic,@function
_Copy_conjoint_jlongs_atomic:
        cmp     %o0, %o1
	bleu    4f
	sll     %o2, 3, %o4
        ba      2f
   1:
	subcc   %o4, 8, %o4
	std     %o2, [%o1]
	add     %o0, 8, %o0
	add     %o1, 8, %o1
   2:
	bge,a   1b
	ldd     [%o0], %o2
	ba      5f
        nop
   3:
	std     %o2, [%o1+%o4]
   4:
	subcc   %o4, 8, %o4
	bge,a   3b
	ldd     [%o0+%o4], %o2
   5:      
	retl
	nop


    .globl _flush_reg_windows
    .align 32
 _flush_reg_windows:
        ta 0x03
        retl
        mov     %fp, %o0