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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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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>
188 lines
2.3 KiB
ArmAsm
188 lines
2.3 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* atomic64_t for 386/486
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*
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* Copyright © 2010 Luca Barbieri
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*/
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#include <linux/linkage.h>
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#include <asm/alternative-asm.h>
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/* if you want SMP support, implement these with real spinlocks */
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.macro LOCK reg
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pushfl
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cli
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.endm
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.macro UNLOCK reg
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popfl
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.endm
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#define BEGIN(op) \
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.macro endp; \
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ENDPROC(atomic64_##op##_386); \
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.purgem endp; \
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.endm; \
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ENTRY(atomic64_##op##_386); \
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LOCK v;
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#define ENDP endp
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#define RET \
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UNLOCK v; \
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ret
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#define RET_ENDP \
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RET; \
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ENDP
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#define v %ecx
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BEGIN(read)
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movl (v), %eax
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movl 4(v), %edx
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RET_ENDP
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#undef v
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#define v %esi
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BEGIN(set)
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movl %ebx, (v)
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movl %ecx, 4(v)
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RET_ENDP
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#undef v
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#define v %esi
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BEGIN(xchg)
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movl (v), %eax
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movl 4(v), %edx
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movl %ebx, (v)
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movl %ecx, 4(v)
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RET_ENDP
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#undef v
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#define v %ecx
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BEGIN(add)
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addl %eax, (v)
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adcl %edx, 4(v)
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RET_ENDP
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#undef v
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#define v %ecx
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BEGIN(add_return)
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addl (v), %eax
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adcl 4(v), %edx
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movl %eax, (v)
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movl %edx, 4(v)
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RET_ENDP
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#undef v
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#define v %ecx
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BEGIN(sub)
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subl %eax, (v)
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sbbl %edx, 4(v)
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RET_ENDP
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#undef v
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#define v %ecx
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BEGIN(sub_return)
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negl %edx
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negl %eax
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sbbl $0, %edx
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addl (v), %eax
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adcl 4(v), %edx
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movl %eax, (v)
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movl %edx, 4(v)
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RET_ENDP
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#undef v
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#define v %esi
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BEGIN(inc)
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addl $1, (v)
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adcl $0, 4(v)
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RET_ENDP
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#undef v
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#define v %esi
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BEGIN(inc_return)
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movl (v), %eax
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movl 4(v), %edx
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addl $1, %eax
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adcl $0, %edx
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movl %eax, (v)
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movl %edx, 4(v)
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RET_ENDP
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#undef v
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#define v %esi
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BEGIN(dec)
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subl $1, (v)
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sbbl $0, 4(v)
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RET_ENDP
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#undef v
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#define v %esi
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BEGIN(dec_return)
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movl (v), %eax
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movl 4(v), %edx
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subl $1, %eax
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sbbl $0, %edx
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movl %eax, (v)
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movl %edx, 4(v)
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RET_ENDP
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#undef v
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#define v %esi
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BEGIN(add_unless)
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addl %eax, %ecx
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adcl %edx, %edi
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addl (v), %eax
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adcl 4(v), %edx
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cmpl %eax, %ecx
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je 3f
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1:
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movl %eax, (v)
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movl %edx, 4(v)
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movl $1, %eax
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2:
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RET
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3:
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cmpl %edx, %edi
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jne 1b
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xorl %eax, %eax
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jmp 2b
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ENDP
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#undef v
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#define v %esi
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BEGIN(inc_not_zero)
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movl (v), %eax
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movl 4(v), %edx
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testl %eax, %eax
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je 3f
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1:
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addl $1, %eax
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adcl $0, %edx
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movl %eax, (v)
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movl %edx, 4(v)
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movl $1, %eax
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2:
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RET
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3:
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testl %edx, %edx
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jne 1b
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jmp 2b
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ENDP
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#undef v
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#define v %esi
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BEGIN(dec_if_positive)
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movl (v), %eax
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movl 4(v), %edx
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subl $1, %eax
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sbbl $0, %edx
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js 1f
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movl %eax, (v)
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movl %edx, 4(v)
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1:
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RET_ENDP
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#undef v
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