/*
* Copyright (c) 2004-2006 Apple Computer, Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this
* file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_LICENSE_HEADER_END@
*/
#include <machine/cpu_capabilities.h>
#define DECLARE(x) \
.align 2, 0x90 .globl x ## Barrier x ## Barrier:
.text
// uint32_t OSAtomicAnd32( uint32_t mask, uint32_t *value) movq $(_COMM_PAGE_COMPARE_AND_SWAP32), %rcx
movl %edi, %r11d // save mask
movl (%rsi), %eax // get value
movq %rsi, %rdx // put ptr where compare-and-swap expects it
1:
movl %r11d, %esi // original mask
movl %eax, %edi // old value
andl %eax, %esi // new value
call *%rcx // %edi=old value, %esi=new value. %rdx=ptr
jnz 1b
movl %esi, %eax
ret
// uint32_t OSAtomicOr32( uint32_t mask, uint32_t *value) movq $(_COMM_PAGE_COMPARE_AND_SWAP32), %rcx
movl %edi, %r11d // save mask
movl (%rsi), %eax // get value
movq %rsi, %rdx // put ptr where compare-and-swap expects it
1:
movl %r11d, %esi // original mask
movl %eax, %edi // old value
orl %eax, %esi // new value
call *%rcx // %edi=old value, %esi=new value. %rdx=ptr
jnz 1b
movl %esi, %eax
ret
// uint32_t OSAtomicXor32( uint32_t mask, uint32_t *value) movq $(_COMM_PAGE_COMPARE_AND_SWAP32), %rcx
movl %edi, %r11d // save mask
movl (%rsi), %eax // get value
movq %rsi, %rdx // put ptr where compare-and-swap expects it
1:
movl %r11d, %esi // original mask
movl %eax, %edi // old value
xorl %eax, %esi // new value
call *%rcx // %edi=old value, %esi=new value. %rdx=ptr
jnz 1b
movl %esi, %eax
ret
// bool OSAtomicCompareAndSwap32( int32_t old, int32_t new, int32_t *value) movq $(_COMM_PAGE_COMPARE_AND_SWAP32), %rcx
call *%rcx // %edi=old value, %esi=new value. %rdx=ptr
sete %al
ret
// bool OSAtomicCompareAndSwap64( int64_t old, int64_t new, int64_t *value) movq $(_COMM_PAGE_COMPARE_AND_SWAP64), %rcx
call *%rcx // %rdi=old value, %rsi=new value. %rdx=ptr
sete %al
ret
// int32_t OSAtomicAdd32( int32_t amt, int32_t *value ) movq $(_COMM_PAGE_ATOMIC_ADD32), %rcx
movl %edi, %eax // save amt to add
call *%rcx
addl %edi,%eax // new value
ret
// int64_t OSAtomicAdd64( int64_t amt, int64_t *value ) movq $(_COMM_PAGE_ATOMIC_ADD64), %rcx
movq %rdi, %rax // save amt to add
call *%rcx
addq %rdi, %rax // new value
ret
// bool OSAtomicTestAndSet( uint32_t n, void *value ) movq $(_COMM_PAGE_BTS), %rax
xorl $7, %edi // bit position is numbered big endian
call *%rax
setc %al
ret
// bool OSAtomicTestAndClear( uint32_t n, void *value ) movq $(_COMM_PAGE_BTC), %rax
xorl $7, %edi // bit position is numbered big endian
call *%rax
setc %al
ret
// bool OSSpinLockTry( OSSpinLock *lock ) .globl _OSSpinLockTry
_OSSpinLockTry:
movq $(_COMM_PAGE_SPINLOCK_TRY), %rax
jmp *%rax
// void OSSpinLockLock( OSSpinLock *lock ) .globl _OSSpinLockLock
_OSSpinLockLock:
movq $(_COMM_PAGE_SPINLOCK_LOCK), %rax
jmp *%rax
// void OSSpinLockUnlock( OSSpinLock *lock ) .globl _OSSpinLockUnlock
_OSSpinLockUnlock:
movl $0, (%rdi)
ret
// void OSMemoryBarrier( void ) .globl _OSMemoryBarrier
_OSMemoryBarrier:
ret