mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 09:19:51 +00:00
2874c5fd28
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
187 lines
2.3 KiB
ArmAsm
187 lines
2.3 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* atomic64_t for 386/486
|
|
*
|
|
* Copyright © 2010 Luca Barbieri
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
#include <asm/alternative-asm.h>
|
|
|
|
/* if you want SMP support, implement these with real spinlocks */
|
|
.macro LOCK reg
|
|
pushfl
|
|
cli
|
|
.endm
|
|
|
|
.macro UNLOCK reg
|
|
popfl
|
|
.endm
|
|
|
|
#define BEGIN(op) \
|
|
.macro endp; \
|
|
ENDPROC(atomic64_##op##_386); \
|
|
.purgem endp; \
|
|
.endm; \
|
|
ENTRY(atomic64_##op##_386); \
|
|
LOCK v;
|
|
|
|
#define ENDP endp
|
|
|
|
#define RET \
|
|
UNLOCK v; \
|
|
ret
|
|
|
|
#define RET_ENDP \
|
|
RET; \
|
|
ENDP
|
|
|
|
#define v %ecx
|
|
BEGIN(read)
|
|
movl (v), %eax
|
|
movl 4(v), %edx
|
|
RET_ENDP
|
|
#undef v
|
|
|
|
#define v %esi
|
|
BEGIN(set)
|
|
movl %ebx, (v)
|
|
movl %ecx, 4(v)
|
|
RET_ENDP
|
|
#undef v
|
|
|
|
#define v %esi
|
|
BEGIN(xchg)
|
|
movl (v), %eax
|
|
movl 4(v), %edx
|
|
movl %ebx, (v)
|
|
movl %ecx, 4(v)
|
|
RET_ENDP
|
|
#undef v
|
|
|
|
#define v %ecx
|
|
BEGIN(add)
|
|
addl %eax, (v)
|
|
adcl %edx, 4(v)
|
|
RET_ENDP
|
|
#undef v
|
|
|
|
#define v %ecx
|
|
BEGIN(add_return)
|
|
addl (v), %eax
|
|
adcl 4(v), %edx
|
|
movl %eax, (v)
|
|
movl %edx, 4(v)
|
|
RET_ENDP
|
|
#undef v
|
|
|
|
#define v %ecx
|
|
BEGIN(sub)
|
|
subl %eax, (v)
|
|
sbbl %edx, 4(v)
|
|
RET_ENDP
|
|
#undef v
|
|
|
|
#define v %ecx
|
|
BEGIN(sub_return)
|
|
negl %edx
|
|
negl %eax
|
|
sbbl $0, %edx
|
|
addl (v), %eax
|
|
adcl 4(v), %edx
|
|
movl %eax, (v)
|
|
movl %edx, 4(v)
|
|
RET_ENDP
|
|
#undef v
|
|
|
|
#define v %esi
|
|
BEGIN(inc)
|
|
addl $1, (v)
|
|
adcl $0, 4(v)
|
|
RET_ENDP
|
|
#undef v
|
|
|
|
#define v %esi
|
|
BEGIN(inc_return)
|
|
movl (v), %eax
|
|
movl 4(v), %edx
|
|
addl $1, %eax
|
|
adcl $0, %edx
|
|
movl %eax, (v)
|
|
movl %edx, 4(v)
|
|
RET_ENDP
|
|
#undef v
|
|
|
|
#define v %esi
|
|
BEGIN(dec)
|
|
subl $1, (v)
|
|
sbbl $0, 4(v)
|
|
RET_ENDP
|
|
#undef v
|
|
|
|
#define v %esi
|
|
BEGIN(dec_return)
|
|
movl (v), %eax
|
|
movl 4(v), %edx
|
|
subl $1, %eax
|
|
sbbl $0, %edx
|
|
movl %eax, (v)
|
|
movl %edx, 4(v)
|
|
RET_ENDP
|
|
#undef v
|
|
|
|
#define v %esi
|
|
BEGIN(add_unless)
|
|
addl %eax, %ecx
|
|
adcl %edx, %edi
|
|
addl (v), %eax
|
|
adcl 4(v), %edx
|
|
cmpl %eax, %ecx
|
|
je 3f
|
|
1:
|
|
movl %eax, (v)
|
|
movl %edx, 4(v)
|
|
movl $1, %eax
|
|
2:
|
|
RET
|
|
3:
|
|
cmpl %edx, %edi
|
|
jne 1b
|
|
xorl %eax, %eax
|
|
jmp 2b
|
|
ENDP
|
|
#undef v
|
|
|
|
#define v %esi
|
|
BEGIN(inc_not_zero)
|
|
movl (v), %eax
|
|
movl 4(v), %edx
|
|
testl %eax, %eax
|
|
je 3f
|
|
1:
|
|
addl $1, %eax
|
|
adcl $0, %edx
|
|
movl %eax, (v)
|
|
movl %edx, 4(v)
|
|
movl $1, %eax
|
|
2:
|
|
RET
|
|
3:
|
|
testl %edx, %edx
|
|
jne 1b
|
|
jmp 2b
|
|
ENDP
|
|
#undef v
|
|
|
|
#define v %esi
|
|
BEGIN(dec_if_positive)
|
|
movl (v), %eax
|
|
movl 4(v), %edx
|
|
subl $1, %eax
|
|
sbbl $0, %edx
|
|
js 1f
|
|
movl %eax, (v)
|
|
movl %edx, 4(v)
|
|
1:
|
|
RET_ENDP
|
|
#undef v
|