VirtualBox

source: vbox/trunk/src/VBox/Runtime/common/math/rtNoCrtHasSse.asm@ 96282

Last change on this file since 96282 was 96205, checked in by vboxsync, 2 years ago

IPRT/nocrt: Implemented x86 and amd64 fenv.h to assist with the testing. More tests. bugref:10261

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 1.7 KB
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1; $Id: rtNoCrtHasSse.asm 96205 2022-08-14 23:40:55Z vboxsync $
2;; @file
3; IPRT - No-CRT rtNoCrtHasSse - X86.
4;
5
6;
7; Copyright (C) 2022 Oracle Corporation
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
27
28%include "iprt/asmdefs.mac"
29%include "iprt/x86.mac"
30
31
32BEGINDATA
33g_frtNoCrtHasSse: db 0x80
34
35
36BEGINCODE
37
38;;
39; Checks if SSE is supported.
40; @returns 1 if supported, 0 if not. Entire eax/rax is set.
41; @uses rax only
42;
43BEGINPROC rtNoCrtHasSse
44 mov al, [g_frtNoCrtHasSse]
45 test al, 0x80
46 jnz .detect_sse
47 ret
48
49.detect_sse:
50 push ebx
51 push ecx
52 push edx
53
54 mov eax, 1
55 cpuid
56
57 mov eax, 1
58 test edx, X86_CPUID_FEATURE_EDX_SSE
59 jz .no_supported
60 xor eax, eax
61.no_supported:
62
63 pop edx
64 pop ecx
65 pop ebx
66 ret
67ENDPROC rtNoCrtHasSse
68
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