diff options
Diffstat (limited to 'src/VBox/Runtime/common/asm/ASMAtomicUoAndU64.asm')
-rw-r--r-- | src/VBox/Runtime/common/asm/ASMAtomicUoAndU64.asm | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/asm/ASMAtomicUoAndU64.asm b/src/VBox/Runtime/common/asm/ASMAtomicUoAndU64.asm new file mode 100644 index 00000000..d0d30c95 --- /dev/null +++ b/src/VBox/Runtime/common/asm/ASMAtomicUoAndU64.asm @@ -0,0 +1,86 @@ +; $Id: ASMAtomicUoAndU64.asm $ +;; @file +; IPRT - ASMAtomicUoAndU64(). +; + +; +; Copyright (C) 2013-2022 Oracle and/or its affiliates. +; +; This file is part of VirtualBox base platform packages, as +; available from https://www.virtualbox.org. +; +; 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, in version 3 of the +; License. +; +; This program is distributed in the hope that it will be useful, but +; WITHOUT ANY WARRANTY; without even the implied warranty of +; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +; General Public License for more details. +; +; You should have received a copy of the GNU General Public License +; along with this program; if not, see <https://www.gnu.org/licenses>. +; +; The contents of this file may alternatively be used under the terms +; of the Common Development and Distribution License Version 1.0 +; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included +; in the VirtualBox distribution, in which case the provisions of the +; CDDL are applicable instead of those of the GPL. +; +; You may elect to license modified versions of this file under the +; terms and conditions of either the GPL or the CDDL or both. +; +; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 +; + +;******************************************************************************* +;* Header Files * +;******************************************************************************* +%include "iprt/asmdefs.mac" + +BEGINCODE + +;; +; Atomically AND an unsigned 64-bit value, unordered. +; +; @param pu64 x86:ebp+8 gcc:rdi msc:rcx +; @param u64Or x86:ebp+c gcc:rsi msc:rdx +; +; @returns void +; +RT_BEGINPROC ASMAtomicUoAndU64 +%ifdef RT_ARCH_AMD64 + %ifdef ASM_CALL64_MSC + and [rcx], rdx + %else + and [rdi], rsi + %endif +%elifdef RT_ARCH_X86 + push ebp + mov ebp, esp + push ebx + push edi + + mov edi, [ebp + 08h] + mov ebx, [ebp + 0ch] + mov ecx, [ebp + 0ch + 4] + mov eax, ebx + mov edx, ecx +.try_again: + cmpxchg8b [edi] + jz .done + mov ebx, eax + and ebx, [ebp + 0ch] + mov ecx, edx + and ecx, [ebp + 0ch + 4] + jmp .try_again + +.done: + pop edi + pop ebx + leave +%endif + ret +ENDPROC ASMAtomicUoAndU64 + |