OSAtomic.s

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    1 /*
    2  * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
    3  *
    4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
    5  * 
    6  * This file contains Original Code and/or Modifications of Original Code
    7  * as defined in and that are subject to the Apple Public Source License
    8  * Version 2.0 (the 'License'). You may not use this file except in
    9  * compliance with the License. The rights granted to you under the License
   10  * may not be used to create, or enable the creation or redistribution of,
   11  * unlawful or unlicensed copies of an Apple operating system, or to
   12  * circumvent, violate, or enable the circumvention or violation of, any
   13  * terms of an Apple operating system software license agreement.
   14  * 
   15  * Please obtain a copy of the License at
   16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
   17  * 
   18  * The Original Code and all software distributed under the License are
   19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
   20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
   21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
   22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
   23  * Please see the License for the specific language governing rights and
   24  * limitations under the License.
   25  * 
   26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
   27  */
   28 
   29 #;***************************************************************************
   30 #;* Boolean OSCompareAndSwap(SInt32 oldValue, SInt32 newValue, SInt32 *ptr) *
   31 #;***************************************************************************
   32 
   33         .globl _OSCompareAndSwap
   34 
   35 // TODO FIXME!!
   36 _OSCompareAndSwap: #;oldValue, newValue, ptr
   37         movl             %edi, %eax
   38         lock
   39         cmpxchgl        %esi, 0(%rdx)   #; CAS (eax is an implicit operand)
   40         sete            %al                             #; did CAS succeed? (TZ=1)
   41         movzbq          %al, %rax               #; clear out the high bytes
   42         ret
   43 
   44 #;*****************************************************************************
   45 #;* Boolean OSCompareAndSwap64(SInt64 oldValue, SInt64 newValue, SInt64 *ptr) *
   46 #;*****************************************************************************
   47 
   48         .globl _OSCompareAndSwap64
   49         .globl _OSCompareAndSwapPtr
   50 
   51 _OSCompareAndSwap64:
   52 _OSCompareAndSwapPtr: #;oldValue, newValue, ptr
   53         movq             %rdi, %rax
   54         lock
   55         cmpxchgq        %rsi, 0(%rdx)   #; CAS (eax is an implicit operand)
   56         sete            %al                             #; did CAS succeed? (TZ=1)
   57         movzbq          %al, %rax               #; clear out the high bytes
   58         ret
   59 
   60 #;*******************************************************
   61 #;* SInt64 OSAddAtomic64(SInt64 theAmount, SInt64 *ptr) *
   62 #;*******************************************************
   63 
   64         .globl  _OSAddAtomicLong
   65         .globl  _OSAddAtomic64
   66 _OSAddAtomic64:
   67 _OSAddAtomicLong:
   68         lock
   69         xaddq   %rdi, 0(%rsi)           #; Atomic exchange and add
   70         movq    %rdi, %rax;
   71         ret
   72 
   73 
   74 #;*******************************************************
   75 #; SInt32 OSAddAtomic(SInt32 delta, SInt32 *address) 
   76 #;*******************************************************
   77 
   78         .globl  _OSAddAtomic
   79 _OSAddAtomic:
   80         lock
   81         xaddl   %edi, 0(%rsi)           #; Atomic exchange and add
   82         movl    %edi, %eax;
   83         ret

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FreeBSD/Linux Kernel Cross Reference sys/libkern/x86_64/OSAtomic.s

FreeBSD/Linux Kernel Cross Reference
sys/libkern/x86_64/OSAtomic.s