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minix/common/lib/libc/arch/i386/atomic/atomic.S
Gianluca Guida b6cbf7203b Import unmodified NetBSD libc in trunk 
This patch imports the unmodified current version of NetBSD libc.
The NetBSD includes are in /nbsd_include, while the libc code itself is 
split between lib/nbsd_libc and common/lib/libc.
2011-02-14 19:36:03 +00:00

385 lines
9.1 KiB
ArmAsm
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/* $NetBSD: atomic.S,v 1.19 2011/01/12 23:12:10 joerg 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 <sys/param.h>
#include <machine/asm.h>
#ifdef _KERNEL
#define ALIAS(f, t) STRONG_ALIAS(f,t)
#else
#define ALIAS(f, t) WEAK_ALIAS(f,t)
#endif
#ifdef _HARDKERNEL
#define LOCK(n) .Lpatch ## n: lock
#define ENDLABEL(a) _ALIGN_TEXT; LABEL(a)
#else
#define LOCK(n) lock
#define ENDLABEL(a) /* nothing */
#endif
.text
ENTRY(_atomic_add_32)
movl 4(%esp), %edx
movl 8(%esp), %eax
LOCK(1)
addl %eax, (%edx)
ret
ENTRY(_atomic_add_32_nv)
movl 4(%esp), %edx
movl 8(%esp), %eax
movl %eax, %ecx
LOCK(2)
xaddl %eax, (%edx)
addl %ecx, %eax
ret
ENTRY(_atomic_and_32)
movl 4(%esp), %edx
movl 8(%esp), %eax
LOCK(3)
andl %eax, (%edx)
ret
ENTRY(_atomic_and_32_nv)
movl 4(%esp), %edx
movl (%edx), %eax
0:
movl %eax, %ecx
andl 8(%esp), %ecx
LOCK(4)
cmpxchgl %ecx, (%edx)
jnz 1f
movl %ecx, %eax
ret
1:
jmp 0b
ENTRY(_atomic_dec_32)
movl 4(%esp), %edx
LOCK(5)
decl (%edx)
ret
ENTRY(_atomic_dec_32_nv)
movl 4(%esp), %edx
movl $-1, %eax
LOCK(6)
xaddl %eax, (%edx)
decl %eax
ret
ENTRY(_atomic_inc_32)
movl 4(%esp), %edx
LOCK(7)
incl (%edx)
ret
ENTRY(_atomic_inc_32_nv)
movl 4(%esp), %edx
movl $1, %eax
LOCK(8)
xaddl %eax, (%edx)
incl %eax
ret
ENTRY(_atomic_or_32)
movl 4(%esp), %edx
movl 8(%esp), %eax
LOCK(9)
orl %eax, (%edx)
ret
ENTRY(_atomic_or_32_nv)
movl 4(%esp), %edx
movl (%edx), %eax
0:
movl %eax, %ecx
orl 8(%esp), %ecx
LOCK(10)
cmpxchgl %ecx, (%edx)
jnz 1f
movl %ecx, %eax
ret
1:
jmp 0b
ENTRY(_atomic_swap_32)
movl 4(%esp), %edx
movl 8(%esp), %eax
xchgl %eax, (%edx)
ret
ENTRY(_atomic_cas_32)
movl 4(%esp), %edx
movl 8(%esp), %eax
movl 12(%esp), %ecx
LOCK(12)
cmpxchgl %ecx, (%edx)
/* %eax now contains the old value */
ret
ENTRY(_atomic_cas_32_ni)
movl 4(%esp), %edx
movl 8(%esp), %eax
movl 12(%esp), %ecx
cmpxchgl %ecx, (%edx)
/* %eax now contains the old value */
ret
ENTRY(_membar_consumer)
LOCK(13)
addl $0, -4(%esp)
ret
ENDLABEL(membar_consumer_end)
ENTRY(_membar_producer)
/* A store is enough */
movl $0, -4(%esp)
ret
ENDLABEL(membar_producer_end)
ENTRY(_membar_sync)
LOCK(14)
addl $0, -4(%esp)
ret
ENDLABEL(membar_sync_end)
#ifdef _HARDKERNEL
ENTRY(_atomic_cas_64)
pushf
cli
pushl %edi
pushl %ebx
movl 12(%esp), %edi
movl 16(%esp), %eax
movl 20(%esp), %edx
movl 24(%esp), %ebx
movl 28(%esp), %ecx
cmpl 0(%edi), %eax
jne 2f
cmpl 4(%edi), %edx
jne 2f
movl %ebx, 0(%edi)
movl %ecx, 4(%edi)
1:
popl %ebx
popl %edi
popf
ret
2:
movl 0(%edi), %eax
movl 4(%edi), %edx
jmp 1b
ENDLABEL(_atomic_cas_64_end)
ENTRY(_atomic_cas_cx8)
pushl %edi
pushl %ebx
movl 12(%esp), %edi
movl 16(%esp), %eax
movl 20(%esp), %edx
movl 24(%esp), %ebx
movl 28(%esp), %ecx
LOCK(15)
cmpxchg8b (%edi)
popl %ebx
popl %edi
ret
#ifdef GPROF
.space 16, 0x90
#else
.space 32, 0x90
#endif
ENDLABEL(_atomic_cas_cx8_end)
ENTRY(sse2_lfence)
lfence
ret
ENDLABEL(sse2_lfence_end)
ENTRY(sse2_mfence)
mfence
ret
ENDLABEL(sse2_mfence_end)
atomic_lockpatch:
.globl atomic_lockpatch
.long .Lpatch1, .Lpatch2, .Lpatch3, .Lpatch4, .Lpatch5
.long .Lpatch6, .Lpatch7, .Lpatch8, .Lpatch9, .Lpatch10
.long .Lpatch12, .Lpatch13, .Lpatch14, .Lpatch15, 0
#else
ENTRY(_atomic_cas_64)
pushl %edi
pushl %ebx
movl 12(%esp), %edi
movl 16(%esp), %eax
movl 20(%esp), %edx
movl 24(%esp), %ebx
movl 28(%esp), %ecx
lock
cmpxchg8b (%edi)
popl %ebx
popl %edi
ret
#endif /* _HARDKERNEL */
ALIAS(atomic_add_32,_atomic_add_32)
ALIAS(atomic_add_int,_atomic_add_32)
ALIAS(atomic_add_long,_atomic_add_32)
ALIAS(atomic_add_ptr,_atomic_add_32)
ALIAS(atomic_add_32_nv,_atomic_add_32_nv)
ALIAS(atomic_add_int_nv,_atomic_add_32_nv)
ALIAS(atomic_add_long_nv,_atomic_add_32_nv)
ALIAS(atomic_add_ptr_nv,_atomic_add_32_nv)
ALIAS(atomic_and_32,_atomic_and_32)
ALIAS(atomic_and_uint,_atomic_and_32)
ALIAS(atomic_and_ulong,_atomic_and_32)
ALIAS(atomic_and_ptr,_atomic_and_32)
ALIAS(atomic_and_32_nv,_atomic_and_32_nv)
ALIAS(atomic_and_uint_nv,_atomic_and_32_nv)
ALIAS(atomic_and_ulong_nv,_atomic_and_32_nv)
ALIAS(atomic_and_ptr_nv,_atomic_and_32_nv)
ALIAS(atomic_dec_32,_atomic_dec_32)
ALIAS(atomic_dec_uint,_atomic_dec_32)
ALIAS(atomic_dec_ulong,_atomic_dec_32)
ALIAS(atomic_dec_ptr,_atomic_dec_32)
ALIAS(atomic_dec_32_nv,_atomic_dec_32_nv)
ALIAS(atomic_dec_uint_nv,_atomic_dec_32_nv)
ALIAS(atomic_dec_ulong_nv,_atomic_dec_32_nv)
ALIAS(atomic_dec_ptr_nv,_atomic_dec_32_nv)
ALIAS(atomic_inc_32,_atomic_inc_32)
ALIAS(atomic_inc_uint,_atomic_inc_32)
ALIAS(atomic_inc_ulong,_atomic_inc_32)
ALIAS(atomic_inc_ptr,_atomic_inc_32)
ALIAS(atomic_inc_32_nv,_atomic_inc_32_nv)
ALIAS(atomic_inc_uint_nv,_atomic_inc_32_nv)
ALIAS(atomic_inc_ulong_nv,_atomic_inc_32_nv)
ALIAS(atomic_inc_ptr_nv,_atomic_inc_32_nv)
ALIAS(atomic_or_32,_atomic_or_32)
ALIAS(atomic_or_uint,_atomic_or_32)
ALIAS(atomic_or_ulong,_atomic_or_32)
ALIAS(atomic_or_ptr,_atomic_or_32)
ALIAS(atomic_or_32_nv,_atomic_or_32_nv)
ALIAS(atomic_or_uint_nv,_atomic_or_32_nv)
ALIAS(atomic_or_ulong_nv,_atomic_or_32_nv)
ALIAS(atomic_or_ptr_nv,_atomic_or_32_nv)
ALIAS(atomic_swap_32,_atomic_swap_32)
ALIAS(atomic_swap_uint,_atomic_swap_32)
ALIAS(atomic_swap_ulong,_atomic_swap_32)
ALIAS(atomic_swap_ptr,_atomic_swap_32)
ALIAS(atomic_cas_32,_atomic_cas_32)
ALIAS(atomic_cas_uint,_atomic_cas_32)
ALIAS(atomic_cas_ulong,_atomic_cas_32)
ALIAS(atomic_cas_ptr,_atomic_cas_32)
ALIAS(atomic_cas_32_ni,_atomic_cas_32_ni)
ALIAS(atomic_cas_uint_ni,_atomic_cas_32_ni)
ALIAS(atomic_cas_ulong_ni,_atomic_cas_32_ni)
ALIAS(atomic_cas_ptr_ni,_atomic_cas_32_ni)
ALIAS(atomic_cas_64,_atomic_cas_64)
ALIAS(atomic_cas_64_ni,_atomic_cas_64)
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_32)
STRONG_ALIAS(_atomic_add_ptr,_atomic_add_32)
STRONG_ALIAS(_atomic_add_int_nv,_atomic_add_32_nv)
STRONG_ALIAS(_atomic_add_long_nv,_atomic_add_32_nv)
STRONG_ALIAS(_atomic_add_ptr_nv,_atomic_add_32_nv)
STRONG_ALIAS(_atomic_and_uint,_atomic_and_32)
STRONG_ALIAS(_atomic_and_ulong,_atomic_and_32)
STRONG_ALIAS(_atomic_and_ptr,_atomic_and_32)
STRONG_ALIAS(_atomic_and_uint_nv,_atomic_and_32_nv)
STRONG_ALIAS(_atomic_and_ulong_nv,_atomic_and_32_nv)
STRONG_ALIAS(_atomic_and_ptr_nv,_atomic_and_32_nv)
STRONG_ALIAS(_atomic_dec_uint,_atomic_dec_32)
STRONG_ALIAS(_atomic_dec_ulong,_atomic_dec_32)
STRONG_ALIAS(_atomic_dec_ptr,_atomic_dec_32)
STRONG_ALIAS(_atomic_dec_uint_nv,_atomic_dec_32_nv)
STRONG_ALIAS(_atomic_dec_ulong_nv,_atomic_dec_32_nv)
STRONG_ALIAS(_atomic_dec_ptr_nv,_atomic_dec_32_nv)
STRONG_ALIAS(_atomic_inc_uint,_atomic_inc_32)
STRONG_ALIAS(_atomic_inc_ulong,_atomic_inc_32)
STRONG_ALIAS(_atomic_inc_ptr,_atomic_inc_32)
STRONG_ALIAS(_atomic_inc_uint_nv,_atomic_inc_32_nv)
STRONG_ALIAS(_atomic_inc_ulong_nv,_atomic_inc_32_nv)
STRONG_ALIAS(_atomic_inc_ptr_nv,_atomic_inc_32_nv)
STRONG_ALIAS(_atomic_or_uint,_atomic_or_32)
STRONG_ALIAS(_atomic_or_ulong,_atomic_or_32)
STRONG_ALIAS(_atomic_or_ptr,_atomic_or_32)
STRONG_ALIAS(_atomic_or_uint_nv,_atomic_or_32_nv)
STRONG_ALIAS(_atomic_or_ulong_nv,_atomic_or_32_nv)
STRONG_ALIAS(_atomic_or_ptr_nv,_atomic_or_32_nv)
STRONG_ALIAS(_atomic_swap_uint,_atomic_swap_32)
STRONG_ALIAS(_atomic_swap_ulong,_atomic_swap_32)
STRONG_ALIAS(_atomic_swap_ptr,_atomic_swap_32)
STRONG_ALIAS(_atomic_cas_uint,_atomic_cas_32)
STRONG_ALIAS(_atomic_cas_ulong,_atomic_cas_32)
STRONG_ALIAS(_atomic_cas_ptr,_atomic_cas_32)
STRONG_ALIAS(_atomic_cas_uint_ni,_atomic_cas_32_ni)
STRONG_ALIAS(_atomic_cas_ulong_ni,_atomic_cas_32_ni)
STRONG_ALIAS(_atomic_cas_ptr_ni,_atomic_cas_32_ni)
STRONG_ALIAS(_membar_enter,_membar_consumer)
STRONG_ALIAS(_membar_exit,_membar_producer)
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