VirtualBox

source: vbox/trunk/src/VBox/Runtime/common/math/rtNoCrtHasSse.asm@ 96407

Last change on this file since 96407 was 96407, checked in by vboxsync, 2 years ago

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1; $Id: rtNoCrtHasSse.asm 96407 2022-08-22 17:43:14Z vboxsync $
2;; @file
3; IPRT - No-CRT rtNoCrtHasSse - X86.
4;
5
6;
7; Copyright (C) 2022 Oracle and/or its affiliates.
8;
9; This file is part of VirtualBox base platform packages, as
10; available from https://www.virtualbox.org.
11;
12; This program is free software; you can redistribute it and/or
13; modify it under the terms of the GNU General Public License
14; as published by the Free Software Foundation, in version 3 of the
15; License.
16;
17; This program is distributed in the hope that it will be useful, but
18; WITHOUT ANY WARRANTY; without even the implied warranty of
19; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
20; General Public License for more details.
21;
22; You should have received a copy of the GNU General Public License
23; along with this program; if not, see <https://www.gnu.org/licenses>.
24;
25; The contents of this file may alternatively be used under the terms
26; of the Common Development and Distribution License Version 1.0
27; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
28; in the VirtualBox distribution, in which case the provisions of the
29; CDDL are applicable instead of those of the GPL.
30;
31; You may elect to license modified versions of this file under the
32; terms and conditions of either the GPL or the CDDL or both.
33;
34; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
35;
36
37
38%include "iprt/asmdefs.mac"
39%include "iprt/x86.mac"
40
41
42BEGINDATA
43g_frtNoCrtHasSse: db 0x80
44
45
46BEGINCODE
47
48;;
49; Checks if SSE is supported.
50; @returns 1 if supported, 0 if not. Entire eax/rax is set.
51; @uses rax only
52;
53BEGINPROC rtNoCrtHasSse
54 mov al, [g_frtNoCrtHasSse]
55 test al, 0x80
56 jnz .detect_sse
57 ret
58
59.detect_sse:
60 push ebx
61 push ecx
62 push edx
63
64 mov eax, 1
65 cpuid
66
67 mov eax, 1
68 test edx, X86_CPUID_FEATURE_EDX_SSE
69 jz .no_supported
70 xor eax, eax
71.no_supported:
72
73 pop edx
74 pop ecx
75 pop ebx
76 ret
77ENDPROC rtNoCrtHasSse
78
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