atomic.s revision 96d9f183facd90dbbc2268c9a51689be0b6a0b46
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2010 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
.file "atomic.s"
#include <sys/asm_linkage.h>
#if defined(_KERNEL)
/*
* Legacy kernel interfaces; they will go away (eventually).
*/
ANSI_PRAGMA_WEAK2(cas8,atomic_cas_8,function)
ANSI_PRAGMA_WEAK2(cas32,atomic_cas_32,function)
ANSI_PRAGMA_WEAK2(cas64,atomic_cas_64,function)
ANSI_PRAGMA_WEAK2(caslong,atomic_cas_ulong,function)
ANSI_PRAGMA_WEAK2(casptr,atomic_cas_ptr,function)
ANSI_PRAGMA_WEAK2(atomic_and_long,atomic_and_ulong,function)
ANSI_PRAGMA_WEAK2(atomic_or_long,atomic_or_ulong,function)
#endif
ENTRY(atomic_inc_8)
ALTENTRY(atomic_inc_uchar)
lock
incb (%rdi)
ret
SET_SIZE(atomic_inc_uchar)
SET_SIZE(atomic_inc_8)
ENTRY(atomic_inc_16)
ALTENTRY(atomic_inc_ushort)
lock
incw (%rdi)
ret
SET_SIZE(atomic_inc_ushort)
SET_SIZE(atomic_inc_16)
ENTRY(atomic_inc_32)
ALTENTRY(atomic_inc_uint)
lock
incl (%rdi)
ret
SET_SIZE(atomic_inc_uint)
SET_SIZE(atomic_inc_32)
ENTRY(atomic_inc_64)
ALTENTRY(atomic_inc_ulong)
lock
incq (%rdi)
ret
SET_SIZE(atomic_inc_ulong)
SET_SIZE(atomic_inc_64)
ENTRY(atomic_inc_8_nv)
ALTENTRY(atomic_inc_uchar_nv)
xorl %eax, %eax / clear upper bits of %eax return register
incb %al / %al = 1
lock
xaddb %al, (%rdi) / %al = old value, (%rdi) = new value
incb %al / return new value
ret
SET_SIZE(atomic_inc_uchar_nv)
SET_SIZE(atomic_inc_8_nv)
ENTRY(atomic_inc_16_nv)
ALTENTRY(atomic_inc_ushort_nv)
xorl %eax, %eax / clear upper bits of %eax return register
incw %ax / %ax = 1
lock
xaddw %ax, (%rdi) / %ax = old value, (%rdi) = new value
incw %ax / return new value
ret
SET_SIZE(atomic_inc_ushort_nv)
SET_SIZE(atomic_inc_16_nv)
ENTRY(atomic_inc_32_nv)
ALTENTRY(atomic_inc_uint_nv)
xorl %eax, %eax / %eax = 0
incl %eax / %eax = 1
lock
xaddl %eax, (%rdi) / %eax = old value, (%rdi) = new value
incl %eax / return new value
ret
SET_SIZE(atomic_inc_uint_nv)
SET_SIZE(atomic_inc_32_nv)
ENTRY(atomic_inc_64_nv)
ALTENTRY(atomic_inc_ulong_nv)
xorq %rax, %rax / %rax = 0
incq %rax / %rax = 1
lock
xaddq %rax, (%rdi) / %rax = old value, (%rdi) = new value
incq %rax / return new value
ret
SET_SIZE(atomic_inc_ulong_nv)
SET_SIZE(atomic_inc_64_nv)
ENTRY(atomic_dec_8)
ALTENTRY(atomic_dec_uchar)
lock
decb (%rdi)
ret
SET_SIZE(atomic_dec_uchar)
SET_SIZE(atomic_dec_8)
ENTRY(atomic_dec_16)
ALTENTRY(atomic_dec_ushort)
lock
decw (%rdi)
ret
SET_SIZE(atomic_dec_ushort)
SET_SIZE(atomic_dec_16)
ENTRY(atomic_dec_32)
ALTENTRY(atomic_dec_uint)
lock
decl (%rdi)
ret
SET_SIZE(atomic_dec_uint)
SET_SIZE(atomic_dec_32)
ENTRY(atomic_dec_64)
ALTENTRY(atomic_dec_ulong)
lock
decq (%rdi)
ret
SET_SIZE(atomic_dec_ulong)
SET_SIZE(atomic_dec_64)
ENTRY(atomic_dec_8_nv)
ALTENTRY(atomic_dec_uchar_nv)
xorl %eax, %eax / clear upper bits of %eax return register
decb %al / %al = -1
lock
xaddb %al, (%rdi) / %al = old value, (%rdi) = new value
decb %al / return new value
ret
SET_SIZE(atomic_dec_uchar_nv)
SET_SIZE(atomic_dec_8_nv)
ENTRY(atomic_dec_16_nv)
ALTENTRY(atomic_dec_ushort_nv)
xorl %eax, %eax / clear upper bits of %eax return register
decw %ax / %ax = -1
lock
xaddw %ax, (%rdi) / %ax = old value, (%rdi) = new value
decw %ax / return new value
ret
SET_SIZE(atomic_dec_ushort_nv)
SET_SIZE(atomic_dec_16_nv)
ENTRY(atomic_dec_32_nv)
ALTENTRY(atomic_dec_uint_nv)
xorl %eax, %eax / %eax = 0
decl %eax / %eax = -1
lock
xaddl %eax, (%rdi) / %eax = old value, (%rdi) = new value
decl %eax / return new value
ret
SET_SIZE(atomic_dec_uint_nv)
SET_SIZE(atomic_dec_32_nv)
ENTRY(atomic_dec_64_nv)
ALTENTRY(atomic_dec_ulong_nv)
xorq %rax, %rax / %rax = 0
decq %rax / %rax = -1
lock
xaddq %rax, (%rdi) / %rax = old value, (%rdi) = new value
decq %rax / return new value
ret
SET_SIZE(atomic_dec_ulong_nv)
SET_SIZE(atomic_dec_64_nv)
ENTRY(atomic_add_8)
ALTENTRY(atomic_add_char)
lock
addb %sil, (%rdi)
ret
SET_SIZE(atomic_add_char)
SET_SIZE(atomic_add_8)
ENTRY(atomic_add_16)
ALTENTRY(atomic_add_short)
lock
addw %si, (%rdi)
ret
SET_SIZE(atomic_add_short)
SET_SIZE(atomic_add_16)
ENTRY(atomic_add_32)
ALTENTRY(atomic_add_int)
lock
addl %esi, (%rdi)
ret
SET_SIZE(atomic_add_int)
SET_SIZE(atomic_add_32)
ENTRY(atomic_add_64)
ALTENTRY(atomic_add_ptr)
ALTENTRY(atomic_add_long)
lock
addq %rsi, (%rdi)
ret
SET_SIZE(atomic_add_long)
SET_SIZE(atomic_add_ptr)
SET_SIZE(atomic_add_64)
ENTRY(atomic_or_8)
ALTENTRY(atomic_or_uchar)
lock
orb %sil, (%rdi)
ret
SET_SIZE(atomic_or_uchar)
SET_SIZE(atomic_or_8)
ENTRY(atomic_or_16)
ALTENTRY(atomic_or_ushort)
lock
orw %si, (%rdi)
ret
SET_SIZE(atomic_or_ushort)
SET_SIZE(atomic_or_16)
ENTRY(atomic_or_32)
ALTENTRY(atomic_or_uint)
lock
orl %esi, (%rdi)
ret
SET_SIZE(atomic_or_uint)
SET_SIZE(atomic_or_32)
ENTRY(atomic_or_64)
ALTENTRY(atomic_or_ulong)
lock
orq %rsi, (%rdi)
ret
SET_SIZE(atomic_or_ulong)
SET_SIZE(atomic_or_64)
ENTRY(atomic_and_8)
ALTENTRY(atomic_and_uchar)
lock
andb %sil, (%rdi)
ret
SET_SIZE(atomic_and_uchar)
SET_SIZE(atomic_and_8)
ENTRY(atomic_and_16)
ALTENTRY(atomic_and_ushort)
lock
andw %si, (%rdi)
ret
SET_SIZE(atomic_and_ushort)
SET_SIZE(atomic_and_16)
ENTRY(atomic_and_32)
ALTENTRY(atomic_and_uint)
lock
andl %esi, (%rdi)
ret
SET_SIZE(atomic_and_uint)
SET_SIZE(atomic_and_32)
ENTRY(atomic_and_64)
ALTENTRY(atomic_and_ulong)
lock
andq %rsi, (%rdi)
ret
SET_SIZE(atomic_and_ulong)
SET_SIZE(atomic_and_64)
ENTRY(atomic_add_8_nv)
ALTENTRY(atomic_add_char_nv)
movzbl %sil, %eax / %al = delta addend, clear upper bits
lock
xaddb %sil, (%rdi) / %sil = old value, (%rdi) = sum
addb %sil, %al / new value = original value + delta
ret
SET_SIZE(atomic_add_char_nv)
SET_SIZE(atomic_add_8_nv)
ENTRY(atomic_add_16_nv)
ALTENTRY(atomic_add_short_nv)
movzwl %si, %eax / %ax = delta addend, clean upper bits
lock
xaddw %si, (%rdi) / %si = old value, (%rdi) = sum
addw %si, %ax / new value = original value + delta
ret
SET_SIZE(atomic_add_short_nv)
SET_SIZE(atomic_add_16_nv)
ENTRY(atomic_add_32_nv)
ALTENTRY(atomic_add_int_nv)
mov %esi, %eax / %eax = delta addend
lock
xaddl %esi, (%rdi) / %esi = old value, (%rdi) = sum
add %esi, %eax / new value = original value + delta
ret
SET_SIZE(atomic_add_int_nv)
SET_SIZE(atomic_add_32_nv)
ENTRY(atomic_add_64_nv)
ALTENTRY(atomic_add_ptr_nv)
ALTENTRY(atomic_add_long_nv)
mov %rsi, %rax / %rax = delta addend
lock
xaddq %rsi, (%rdi) / %rsi = old value, (%rdi) = sum
addq %rsi, %rax / new value = original value + delta
ret
SET_SIZE(atomic_add_long_nv)
SET_SIZE(atomic_add_ptr_nv)
SET_SIZE(atomic_add_64_nv)
ENTRY(atomic_and_8_nv)
ALTENTRY(atomic_and_uchar_nv)
movb (%rdi), %al / %al = old value
1:
movb %sil, %cl
andb %al, %cl / %cl = new value
lock
cmpxchgb %cl, (%rdi) / try to stick it in
jne 1b
movzbl %cl, %eax / return new value
ret
SET_SIZE(atomic_and_uchar_nv)
SET_SIZE(atomic_and_8_nv)
ENTRY(atomic_and_16_nv)
ALTENTRY(atomic_and_ushort_nv)
movw (%rdi), %ax / %ax = old value
1:
movw %si, %cx
andw %ax, %cx / %cx = new value
lock
cmpxchgw %cx, (%rdi) / try to stick it in
jne 1b
movzwl %cx, %eax / return new value
ret
SET_SIZE(atomic_and_ushort_nv)
SET_SIZE(atomic_and_16_nv)
ENTRY(atomic_and_32_nv)
ALTENTRY(atomic_and_uint_nv)
movl (%rdi), %eax
1:
movl %esi, %ecx
andl %eax, %ecx
lock
cmpxchgl %ecx, (%rdi)
jne 1b
movl %ecx, %eax
ret
SET_SIZE(atomic_and_uint_nv)
SET_SIZE(atomic_and_32_nv)
ENTRY(atomic_and_64_nv)
ALTENTRY(atomic_and_ulong_nv)
movq (%rdi), %rax
1:
movq %rsi, %rcx
andq %rax, %rcx
lock
cmpxchgq %rcx, (%rdi)
jne 1b
movq %rcx, %rax
ret
SET_SIZE(atomic_and_ulong_nv)
SET_SIZE(atomic_and_64_nv)
ENTRY(atomic_or_8_nv)
ALTENTRY(atomic_or_uchar_nv)
movb (%rdi), %al / %al = old value
1:
movb %sil, %cl
orb %al, %cl / %cl = new value
lock
cmpxchgb %cl, (%rdi) / try to stick it in
jne 1b
movzbl %cl, %eax / return new value
ret
SET_SIZE(atomic_and_uchar_nv)
SET_SIZE(atomic_and_8_nv)
ENTRY(atomic_or_16_nv)
ALTENTRY(atomic_or_ushort_nv)
movw (%rdi), %ax / %ax = old value
1:
movw %si, %cx
orw %ax, %cx / %cx = new value
lock
cmpxchgw %cx, (%rdi) / try to stick it in
jne 1b
movzwl %cx, %eax / return new value
ret
SET_SIZE(atomic_or_ushort_nv)
SET_SIZE(atomic_or_16_nv)
ENTRY(atomic_or_32_nv)
ALTENTRY(atomic_or_uint_nv)
movl (%rdi), %eax
1:
movl %esi, %ecx
orl %eax, %ecx
lock
cmpxchgl %ecx, (%rdi)
jne 1b
movl %ecx, %eax
ret
SET_SIZE(atomic_or_uint_nv)
SET_SIZE(atomic_or_32_nv)
ENTRY(atomic_or_64_nv)
ALTENTRY(atomic_or_ulong_nv)
movq (%rdi), %rax
1:
movq %rsi, %rcx
orq %rax, %rcx
lock
cmpxchgq %rcx, (%rdi)
jne 1b
movq %rcx, %rax
ret
SET_SIZE(atomic_or_ulong_nv)
SET_SIZE(atomic_or_64_nv)
ENTRY(atomic_cas_8)
ALTENTRY(atomic_cas_uchar)
movzbl %sil, %eax
lock
cmpxchgb %dl, (%rdi)
ret
SET_SIZE(atomic_cas_uchar)
SET_SIZE(atomic_cas_8)
ENTRY(atomic_cas_16)
ALTENTRY(atomic_cas_ushort)
movzwl %si, %eax
lock
cmpxchgw %dx, (%rdi)
ret
SET_SIZE(atomic_cas_ushort)
SET_SIZE(atomic_cas_16)
ENTRY(atomic_cas_32)
ALTENTRY(atomic_cas_uint)
movl %esi, %eax
lock
cmpxchgl %edx, (%rdi)
ret
SET_SIZE(atomic_cas_uint)
SET_SIZE(atomic_cas_32)
ENTRY(atomic_cas_64)
ALTENTRY(atomic_cas_ulong)
ALTENTRY(atomic_cas_ptr)
movq %rsi, %rax
lock
cmpxchgq %rdx, (%rdi)
ret
SET_SIZE(atomic_cas_ptr)
SET_SIZE(atomic_cas_ulong)
SET_SIZE(atomic_cas_64)
ENTRY(atomic_swap_8)
ALTENTRY(atomic_swap_uchar)
movzbl %sil, %eax
lock
xchgb %al, (%rdi)
ret
SET_SIZE(atomic_swap_uchar)
SET_SIZE(atomic_swap_8)
ENTRY(atomic_swap_16)
ALTENTRY(atomic_swap_ushort)
movzwl %si, %eax
lock
xchgw %ax, (%rdi)
ret
SET_SIZE(atomic_swap_ushort)
SET_SIZE(atomic_swap_16)
ENTRY(atomic_swap_32)
ALTENTRY(atomic_swap_uint)
movl %esi, %eax
lock
xchgl %eax, (%rdi)
ret
SET_SIZE(atomic_swap_uint)
SET_SIZE(atomic_swap_32)
ENTRY(atomic_swap_64)
ALTENTRY(atomic_swap_ulong)
ALTENTRY(atomic_swap_ptr)
movq %rsi, %rax
lock
xchgq %rax, (%rdi)
ret
SET_SIZE(atomic_swap_ptr)
SET_SIZE(atomic_swap_ulong)
SET_SIZE(atomic_swap_64)
ENTRY(atomic_set_long_excl)
xorl %eax, %eax
lock
btsq %rsi, (%rdi)
jnc 1f
decl %eax / return -1
1:
ret
SET_SIZE(atomic_set_long_excl)
ENTRY(atomic_clear_long_excl)
xorl %eax, %eax
lock
btrq %rsi, (%rdi)
jc 1f
decl %eax / return -1
1:
ret
SET_SIZE(atomic_clear_long_excl)
#if !defined(_KERNEL)
/*
* NOTE: membar_enter, and membar_exit are identical routines.
* We define them separately, instead of using an ALTENTRY
* definitions to alias them together, so that DTrace and
* debuggers will see a unique address for them, allowing
* more accurate tracing.
*/
ENTRY(membar_enter)
mfence
ret
SET_SIZE(membar_enter)
ENTRY(membar_exit)
mfence
ret
SET_SIZE(membar_exit)
ENTRY(membar_producer)
sfence
ret
SET_SIZE(membar_producer)
ENTRY(membar_consumer)
lfence
ret
SET_SIZE(membar_consumer)
#endif /* !_KERNEL */