From f215e02bf85f68d3a6106c2a1f4f7f063f819064 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:17:27 +0200 Subject: Adding upstream version 7.0.14-dfsg. Signed-off-by: Daniel Baumann --- src/VBox/Runtime/common/string/strlen.asm | 75 +++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 src/VBox/Runtime/common/string/strlen.asm (limited to 'src/VBox/Runtime/common/string/strlen.asm') diff --git a/src/VBox/Runtime/common/string/strlen.asm b/src/VBox/Runtime/common/string/strlen.asm new file mode 100644 index 00000000..6c2ebb54 --- /dev/null +++ b/src/VBox/Runtime/common/string/strlen.asm @@ -0,0 +1,75 @@ +; $Id: strlen.asm $ +;; @file +; IPRT - No-CRT strlen - AMD64 & X86. +; + +; +; Copyright (C) 2006-2023 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 . +; +; 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 +; + +%include "iprt/asmdefs.mac" + +BEGINCODE + +;; +; @param psz gcc: rdi msc: rcx x86: [esp+4] wcall: eax +RT_NOCRT_BEGINPROC strlen + cld +%ifdef RT_ARCH_AMD64 + %ifdef ASM_CALL64_MSC + mov r9, rdi ; save rdi + mov rdi, rcx + %endif +%else + mov edx, edi ; save edi + %ifdef ASM_CALL32_WATCOM + mov edi, eax + %else + mov edi, [esp + 4] + %endif +%endif + + ; do the search + mov xCX, -1 + xor eax, eax + repne scasb + + ; found it + neg xCX + lea xAX, [xCX - 2] +%ifdef ASM_CALL64_MSC + mov rdi, r9 +%endif +%ifdef RT_ARCH_X86 + mov edi, edx +%endif + ret +ENDPROC RT_NOCRT(strlen) + -- cgit v1.2.3