NetBSD-5.0.2/common/lib/libc/arch/x86_64/atomic/atomic.S
/* $NetBSD: atomic.S,v 1.12 2008/05/25 15:56:12 chs Exp $ */
/*-
* Copyright (c) 2007 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe, and by Andrew Doran.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <machine/asm.h>
#ifdef _KERNEL
#define LOCK(n) .Lpatch/**/n: lock
#define ALIAS(f, t) STRONG_ALIAS(f,t)
#define ENDLABEL(a) _ALIGN_TEXT; LABEL(a)
#else
#define LOCK(n) lock
#define ALIAS(f, t) WEAK_ALIAS(f,t)
#define ENDLABEL(a) /* nothing */
#endif
.text
/* 32-bit */
ENTRY(_atomic_add_32)
LOCK(1)
addl %esi, (%rdi)
ret
ENTRY(_atomic_add_32_nv)
movl %esi, %eax
LOCK(2)
xaddl %eax, (%rdi)
addl %esi, %eax
ret
ENTRY(_atomic_and_32)
LOCK(3)
andl %esi, (%rdi)
ret
ENTRY(_atomic_and_32_nv)
movl (%rdi), %eax
1:
movl %eax, %ecx
andl %esi, %ecx
LOCK(4)
cmpxchgl %ecx, (%rdi)
jnz 1b
movl %ecx, %eax
ret
ENTRY(_atomic_dec_32)
LOCK(5)
decl (%rdi)
ret
ENTRY(_atomic_dec_32_nv)
movl $-1, %eax
LOCK(6)
xaddl %eax, (%rdi)
decl %eax
ret
ENTRY(_atomic_inc_32)
LOCK(7)
incl (%rdi)
ret
ENTRY(_atomic_inc_32_nv)
movl $1, %eax
LOCK(8)
xaddl %eax, (%rdi)
incl %eax
ret
ENTRY(_atomic_or_32)
LOCK(9)
orl %esi, (%rdi)
ret
ENTRY(_atomic_or_32_nv)
movl (%rdi), %eax
1:
movl %eax, %ecx
orl %esi, %ecx
LOCK(10)
cmpxchgl %ecx, (%rdi)
jnz 1b
movl %ecx, %eax
ret
ENTRY(_atomic_swap_32)
movl %esi, %eax
xchgl %eax, (%rdi)
ret
ENTRY(_atomic_cas_32)
movl %esi, %eax
LOCK(12)
cmpxchgl %edx, (%rdi)
/* %eax now contains the old value */
ret
ENTRY(_atomic_cas_32_ni)
movl %esi, %eax
cmpxchgl %edx, (%rdi)
/* %eax now contains the old value */
ret
/* 64-bit */
ENTRY(_atomic_add_64)
LOCK(13)
addq %rsi, (%rdi)
ret
ENTRY(_atomic_add_64_nv)
movq %rsi, %rax
LOCK(14)
xaddq %rax, (%rdi)
addq %rsi, %rax
ret
ENTRY(_atomic_and_64)
LOCK(15)
andq %rsi, (%rdi)
ret
ENTRY(_atomic_and_64_nv)
movq (%rdi), %rax
1:
movq %rax, %rcx
andq %rsi, %rcx
LOCK(16)
cmpxchgq %rcx, (%rdi)
jnz 1b
movq %rcx, %rax
ret
ENTRY(_atomic_dec_64)
LOCK(17)
decq (%rdi)
ret
ENTRY(_atomic_dec_64_nv)
movq $-1, %rax
LOCK(18)
xaddq %rax, (%rdi)
decq %rax
ret
ENTRY(_atomic_inc_64)
LOCK(19)
incq (%rdi)
ret
ENTRY(_atomic_inc_64_nv)
movq $1, %rax
LOCK(20)
xaddq %rax, (%rdi)
incq %rax
ret
ENTRY(_atomic_or_64)
LOCK(21)
orq %rsi, (%rdi)
ret
ENTRY(_atomic_or_64_nv)
movq (%rdi), %rax
1:
movq %rax, %rcx
orq %rsi, %rcx
LOCK(22)
cmpxchgq %rcx, (%rdi)
jnz 1b
movq %rcx, %rax
ret
ENTRY(_atomic_swap_64)
movq %rsi, %rax
xchgq %rax, (%rdi)
ret
ENTRY(_atomic_cas_64)
movq %rsi, %rax
LOCK(24)
cmpxchgq %rdx, (%rdi)
/* %eax now contains the old value */
ret
ENTRY(_atomic_cas_64_ni)
movq %rsi, %rax
cmpxchgq %rdx, (%rdi)
/* %eax now contains the old value */
ret
/* memory barriers */
ENTRY(_membar_consumer)
LOCK(25)
addq $0, -8(%rsp)
ret
ENDLABEL(membar_consumer_end)
ENTRY(_membar_producer)
/* A store is enough */
movq $0, -8(%rsp)
ret
ENDLABEL(membar_producer_end)
ENTRY(_membar_sync)
LOCK(26)
addq $0, -8(%rsp)
ret
ENDLABEL(membar_sync_end)
#ifdef _KERNEL
ENTRY(sse2_lfence)
lfence
ret
ENDLABEL(sse2_lfence_end)
ENTRY(sse2_mfence)
mfence
ret
ENDLABEL(sse2_mfence_end)
atomic_lockpatch:
.globl atomic_lockpatch
.quad .Lpatch1, .Lpatch2, .Lpatch3, .Lpatch4, .Lpatch5
.quad .Lpatch6, .Lpatch7, .Lpatch8, .Lpatch9, .Lpatch10
.quad .Lpatch12, .Lpatch13, .Lpatch14, .Lpatch15
.quad .Lpatch16, .Lpatch17, .Lpatch18, .Lpatch19, .Lpatch20
.quad .Lpatch21, .Lpatch22, .Lpatch24, .Lpatch25
.quad .Lpatch26, 0
#endif /* _KERNEL */
ALIAS(atomic_add_32,_atomic_add_32)
ALIAS(atomic_add_64,_atomic_add_64)
ALIAS(atomic_add_int,_atomic_add_32)
ALIAS(atomic_add_long,_atomic_add_64)
ALIAS(atomic_add_ptr,_atomic_add_64)
ALIAS(atomic_add_32_nv,_atomic_add_32_nv)
ALIAS(atomic_add_64_nv,_atomic_add_64_nv)
ALIAS(atomic_add_int_nv,_atomic_add_32_nv)
ALIAS(atomic_add_long_nv,_atomic_add_64_nv)
ALIAS(atomic_add_ptr_nv,_atomic_add_64_nv)
ALIAS(atomic_and_32,_atomic_and_32)
ALIAS(atomic_and_64,_atomic_and_64)
ALIAS(atomic_and_uint,_atomic_and_32)
ALIAS(atomic_and_ulong,_atomic_and_64)
ALIAS(atomic_and_ptr,_atomic_and_64)
ALIAS(atomic_and_32_nv,_atomic_and_32_nv)
ALIAS(atomic_and_64_nv,_atomic_and_64_nv)
ALIAS(atomic_and_uint_nv,_atomic_and_32_nv)
ALIAS(atomic_and_ulong_nv,_atomic_and_64_nv)
ALIAS(atomic_and_ptr_nv,_atomic_and_64_nv)
ALIAS(atomic_dec_32,_atomic_dec_32)
ALIAS(atomic_dec_64,_atomic_dec_64)
ALIAS(atomic_dec_uint,_atomic_dec_32)
ALIAS(atomic_dec_ulong,_atomic_dec_64)
ALIAS(atomic_dec_ptr,_atomic_dec_64)
ALIAS(atomic_dec_32_nv,_atomic_dec_32_nv)
ALIAS(atomic_dec_64_nv,_atomic_dec_64_nv)
ALIAS(atomic_dec_uint_nv,_atomic_dec_32_nv)
ALIAS(atomic_dec_ulong_nv,_atomic_dec_64_nv)
ALIAS(atomic_dec_ptr_nv,_atomic_dec_64_nv)
ALIAS(atomic_inc_32,_atomic_inc_32)
ALIAS(atomic_inc_64,_atomic_inc_64)
ALIAS(atomic_inc_uint,_atomic_inc_32)
ALIAS(atomic_inc_ulong,_atomic_inc_64)
ALIAS(atomic_inc_ptr,_atomic_inc_64)
ALIAS(atomic_inc_32_nv,_atomic_inc_32_nv)
ALIAS(atomic_inc_64_nv,_atomic_inc_64_nv)
ALIAS(atomic_inc_uint_nv,_atomic_inc_32_nv)
ALIAS(atomic_inc_ulong_nv,_atomic_inc_64_nv)
ALIAS(atomic_inc_ptr_nv,_atomic_inc_64_nv)
ALIAS(atomic_or_32,_atomic_or_32)
ALIAS(atomic_or_uint,_atomic_or_32)
ALIAS(atomic_or_ulong,_atomic_or_64)
ALIAS(atomic_or_ptr,_atomic_or_64)
ALIAS(atomic_or_32_nv,_atomic_or_32_nv)
ALIAS(atomic_or_64_nv,_atomic_or_64_nv)
ALIAS(atomic_or_uint_nv,_atomic_or_32_nv)
ALIAS(atomic_or_ulong_nv,_atomic_or_64_nv)
ALIAS(atomic_or_ptr_nv,_atomic_or_64_nv)
ALIAS(atomic_swap_32,_atomic_swap_32)
ALIAS(atomic_swap_64,_atomic_swap_64)
ALIAS(atomic_swap_uint,_atomic_swap_32)
ALIAS(atomic_swap_ulong,_atomic_swap_64)
ALIAS(atomic_swap_ptr,_atomic_swap_64)
ALIAS(atomic_cas_32,_atomic_cas_32)
ALIAS(atomic_cas_64,_atomic_cas_64)
ALIAS(atomic_cas_uint,_atomic_cas_32)
ALIAS(atomic_cas_ulong,_atomic_cas_64)
ALIAS(atomic_cas_ptr,_atomic_cas_64)
ALIAS(atomic_cas_32_ni,_atomic_cas_32_ni)
ALIAS(atomic_cas_64_ni,_atomic_cas_64_ni)
ALIAS(atomic_cas_uint_ni,_atomic_cas_32_ni)
ALIAS(atomic_cas_ulong_ni,_atomic_cas_64_ni)
ALIAS(atomic_cas_ptr_ni,_atomic_cas_64_ni)
ALIAS(membar_consumer,_membar_consumer)
ALIAS(membar_producer,_membar_producer)
ALIAS(membar_enter,_membar_consumer)
ALIAS(membar_exit,_membar_producer)
ALIAS(membar_sync,_membar_sync)
STRONG_ALIAS(_atomic_add_int,_atomic_add_32)
STRONG_ALIAS(_atomic_add_long,_atomic_add_64)
STRONG_ALIAS(_atomic_add_ptr,_atomic_add_64)
STRONG_ALIAS(_atomic_add_int_nv,_atomic_add_32_nv)
STRONG_ALIAS(_atomic_add_long_nv,_atomic_add_64_nv)
STRONG_ALIAS(_atomic_add_ptr_nv,_atomic_add_64_nv)
STRONG_ALIAS(_atomic_and_uint,_atomic_and_32)
STRONG_ALIAS(_atomic_and_ulong,_atomic_and_64)
STRONG_ALIAS(_atomic_and_ptr,_atomic_and_64)
STRONG_ALIAS(_atomic_and_uint_nv,_atomic_and_32_nv)
STRONG_ALIAS(_atomic_and_ulong_nv,_atomic_and_64_nv)
STRONG_ALIAS(_atomic_and_ptr_nv,_atomic_and_64_nv)
STRONG_ALIAS(_atomic_dec_uint,_atomic_dec_32)
STRONG_ALIAS(_atomic_dec_ulong,_atomic_dec_64)
STRONG_ALIAS(_atomic_dec_ptr,_atomic_dec_64)
STRONG_ALIAS(_atomic_dec_uint_nv,_atomic_dec_32_nv)
STRONG_ALIAS(_atomic_dec_ulong_nv,_atomic_dec_64_nv)
STRONG_ALIAS(_atomic_dec_ptr_nv,_atomic_dec_64_nv)
STRONG_ALIAS(_atomic_inc_uint,_atomic_inc_32)
STRONG_ALIAS(_atomic_inc_ulong,_atomic_inc_64)
STRONG_ALIAS(_atomic_inc_ptr,_atomic_inc_64)
STRONG_ALIAS(_atomic_inc_uint_nv,_atomic_inc_32_nv)
STRONG_ALIAS(_atomic_inc_ulong_nv,_atomic_inc_64_nv)
STRONG_ALIAS(_atomic_inc_ptr_nv,_atomic_inc_64_nv)
STRONG_ALIAS(_atomic_or_uint,_atomic_or_32)
STRONG_ALIAS(_atomic_or_ulong,_atomic_or_64)
STRONG_ALIAS(_atomic_or_ptr,_atomic_or_64)
STRONG_ALIAS(_atomic_or_uint_nv,_atomic_or_32_nv)
STRONG_ALIAS(_atomic_or_ulong_nv,_atomic_or_64_nv)
STRONG_ALIAS(_atomic_or_ptr_nv,_atomic_or_64_nv)
STRONG_ALIAS(_atomic_swap_uint,_atomic_swap_32)
STRONG_ALIAS(_atomic_swap_ulong,_atomic_swap_64)
STRONG_ALIAS(_atomic_swap_ptr,_atomic_swap_64)
STRONG_ALIAS(_atomic_cas_uint,_atomic_cas_32)
STRONG_ALIAS(_atomic_cas_ulong,_atomic_cas_64)
STRONG_ALIAS(_atomic_cas_ptr,_atomic_cas_64)
STRONG_ALIAS(_atomic_cas_uint_ni,_atomic_cas_32_ni)
STRONG_ALIAS(_atomic_cas_ulong_ni,_atomic_cas_64_ni)
STRONG_ALIAS(_atomic_cas_ptr_ni,_atomic_cas_64_ni)
STRONG_ALIAS(_membar_enter,_membar_consumer)
STRONG_ALIAS(_membar_exit,_membar_producer)