VirtualBox

source: vbox/trunk/src/VBox/Runtime/common/string/mempcpy.asm@ 14786

Last change on this file since 14786 was 14021, checked in by vboxsync, 16 years ago

The VMMR0 template now uses the IPRT No-CRT stuff, as does RuntimeR0. Added nocrt strcpy and fixed completely busted aliases.

  • Property svn:eol-style set to native
  • Property svn:keywords set to Id
File size: 2.6 KB
Line 
1; $Id: mempcpy.asm 14021 2008-11-10 16:31:22Z vboxsync $
2;; @file
3; IPRT - No-CRT mempcpy - AMD64 & X86.
4;
5
6;
7; Copyright (C) 2006-2007 Sun Microsystems, Inc.
8;
9; This file is part of VirtualBox Open Source Edition (OSE), as
10; available from http://www.virtualbox.org. This file is free software;
11; you can redistribute it and/or modify it under the terms of the GNU
12; General Public License (GPL) as published by the Free Software
13; Foundation, in version 2 as it comes in the "COPYING" file of the
14; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16;
17; The contents of this file may alternatively be used under the terms
18; of the Common Development and Distribution License Version 1.0
19; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20; VirtualBox OSE distribution, in which case the provisions of the
21; CDDL are applicable instead of those of the GPL.
22;
23; You may elect to license modified versions of this file under the
24; terms and conditions of either the GPL or the CDDL or both.
25;
26; Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
27; Clara, CA 95054 USA or visit http://www.sun.com if you need
28; additional information or have any questions.
29;
30
31%include "iprt/asmdefs.mac"
32
33BEGINCODE
34
35;;
36; @param pvDst gcc: rdi msc: rcx x86:[esp+4]
37; @param pvSrc gcc: rsi msc: rdx x86:[esp+8]
38; @param cb gcc: rdx msc: r8 x86:[esp+0ch]
39RT_NOCRT_BEGINPROC mempcpy
40 cld ; paranoia
41
42 ; Do the bulk of the work.
43%ifdef RT_ARCH_AMD64
44 %ifdef ASM_CALL64_MSC
45 mov r10, rdi ; save
46 mov r11, rsi ; save
47 mov rdi, rcx
48 mov rsi, rdx
49 mov rcx, r8
50 mov rdx, r8
51 %else
52 mov rcx, rdx
53 %endif
54 shr rcx, 3
55 rep movsq
56%else
57 mov eax, edi ; saving edi in eax
58 push esi
59
60 mov ecx, [esp + 0ch + 4]
61 mov edi, [esp + 04h + 4]
62 mov esi, [esp + 08h + 4]
63 mov edx, ecx
64 shr ecx, 2
65 rep movsd
66%endif
67
68 ; The remaining bytes.
69%ifdef RT_ARCH_AMD64
70 test dl, 4
71 jz .dont_move_dword
72 movsd
73%endif
74.dont_move_dword:
75 test dl, 2
76 jz .dont_move_word
77 movsw
78.dont_move_word:
79 test dl, 1
80 jz .dont_move_byte
81 movsb
82.dont_move_byte:
83
84 ; restore & return
85%ifdef RT_ARCH_AMD64
86 mov rax, rdi
87 %ifdef ASM_CALL64_MSC
88 mov rsi, r11
89 mov rdi, r10
90 %endif
91%else
92 pop esi
93 xchg eax, edi
94%endif
95 ret
96ENDPROC RT_NOCRT(mempcpy)
97
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