| 1 | ;; @file
|
|---|
| 2 | ; IPRT - ASMAtomicBitTestAndToggle().
|
|---|
| 3 | ;
|
|---|
| 4 |
|
|---|
| 5 | ;
|
|---|
| 6 | ; Copyright (C) 2006-2024 Oracle and/or its affiliates.
|
|---|
| 7 | ;
|
|---|
| 8 | ; This file is part of VirtualBox base platform packages, as
|
|---|
| 9 | ; available from https://www.virtualbox.org.
|
|---|
| 10 | ;
|
|---|
| 11 | ; This program is free software; you can redistribute it and/or
|
|---|
| 12 | ; modify it under the terms of the GNU General Public License
|
|---|
| 13 | ; as published by the Free Software Foundation, in version 3 of the
|
|---|
| 14 | ; License.
|
|---|
| 15 | ;
|
|---|
| 16 | ; This program is distributed in the hope that it will be useful, but
|
|---|
| 17 | ; WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 18 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|---|
| 19 | ; General Public License for more details.
|
|---|
| 20 | ;
|
|---|
| 21 | ; You should have received a copy of the GNU General Public License
|
|---|
| 22 | ; along with this program; if not, see <https://www.gnu.org/licenses>.
|
|---|
| 23 | ;
|
|---|
| 24 | ; The contents of this file may alternatively be used under the terms
|
|---|
| 25 | ; of the Common Development and Distribution License Version 1.0
|
|---|
| 26 | ; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
|
|---|
| 27 | ; in the VirtualBox distribution, in which case the provisions of the
|
|---|
| 28 | ; CDDL are applicable instead of those of the GPL.
|
|---|
| 29 | ;
|
|---|
| 30 | ; You may elect to license modified versions of this file under the
|
|---|
| 31 | ; terms and conditions of either the GPL or the CDDL or both.
|
|---|
| 32 | ;
|
|---|
| 33 | ; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
|
|---|
| 34 | ;
|
|---|
| 35 |
|
|---|
| 36 |
|
|---|
| 37 | ;*******************************************************************************
|
|---|
| 38 | ;* Header Files *
|
|---|
| 39 | ;*******************************************************************************
|
|---|
| 40 | %include "iprt/asmdefs.mac"
|
|---|
| 41 |
|
|---|
| 42 | BEGINCODE
|
|---|
| 43 |
|
|---|
| 44 | ;;
|
|---|
| 45 | ; Atomically tests and toggles a bit in a bitmap.
|
|---|
| 46 | ;
|
|---|
| 47 | ; @returns al(rax) true if the bit was set.
|
|---|
| 48 | ; @returns al(rax) false if the bit was clear.
|
|---|
| 49 | ; @param rcx pvBitmap Pointer to the bitmap.
|
|---|
| 50 | ; @param edx iBit The bit to test and toggle.
|
|---|
| 51 | RT_BEGINPROC ASMAtomicBitTestAndToggle
|
|---|
| 52 | lock btc [rcx], edx
|
|---|
| 53 | sbb eax, eax
|
|---|
| 54 | ret
|
|---|
| 55 | ENDPROC ASMAtomicBitTestAndToggle
|
|---|
| 56 |
|
|---|
