10b9d77bf1
Few new things available from now on: - Data deduplication. - Triple parity RAIDZ (RAIDZ3). - zfs diff. - zpool split. - Snapshot holds. - zpool import -F. Allows to rewind corrupted pool to earlier transaction group. - Possibility to import pool in read-only mode. MFC after: 1 month
69 lines
1.7 KiB
ArmAsm
69 lines
1.7 KiB
ArmAsm
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2004, 2010, Oracle and/or its affiliates. All rights reserved.
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*/
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.file "atomic.s"
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#define _ASM
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#include <sys/asm_linkage.h>
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ENTRY(atomic_add_64_nv)
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mov %rsi, %rax // %rax = delta addend
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lock
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xaddq %rsi, (%rdi) // %rsi = old value, (%rdi) = sum
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addq %rsi, %rax // new value = original value + delta
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ret
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SET_SIZE(atomic_add_64_nv)
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ENTRY(atomic_or_8_nv)
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movb (%rdi), %al // %al = old value
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1:
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movb %sil, %cl
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orb %al, %cl // %cl = new value
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lock
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cmpxchgb %cl, (%rdi) // try to stick it in
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jne 1b
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movzbl %cl, %eax // return new value
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ret
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SET_SIZE(atomic_or_8_nv)
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ENTRY(atomic_cas_32)
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movl %esi, %eax
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lock
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cmpxchgl %edx, (%rdi)
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ret
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SET_SIZE(atomic_cas_32)
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ENTRY(atomic_cas_64)
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movq %rsi, %rax
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lock
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cmpxchgq %rdx, (%rdi)
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ret
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SET_SIZE(atomic_cas_64)
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ENTRY(membar_producer)
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sfence
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ret
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SET_SIZE(membar_producer)
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