VirtualBox

source: vbox/trunk/src/VBox/Runtime/common/math/cosl.asm@ 93943

Last change on this file since 93943 was 93115, checked in by vboxsync, 3 years ago

scm --update-copyright-year

  • Property svn:eol-style set to native
  • Property svn:keywords set to Author Date Id Revision
File size: 1.5 KB
Line 
1; $Id: cosl.asm 93115 2022-01-01 11:31:46Z vboxsync $
2;; @file
3; IPRT - No-CRT cosl - AMD64 & X86.
4;
5
6;
7; Copyright (C) 2006-2022 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%include "iprt/asmdefs.mac"
28
29BEGINCODE
30
31;;
32; compute the cosine of ldr, measured in radians.
33; @returns st(0)
34; @param lrd [rbp + xCB*2]
35BEGINPROC RT_NOCRT(cosl)
36 push xBP
37 mov xBP, xSP
38 sub xSP, 10h
39
40 fld tword [xBP + xCB*2]
41 fcos
42 fnstsw ax
43 test ah, 4
44 jz .done
45
46 fldpi
47 fadd st0, st0
48 fxch st1
49.again:
50 fprem1
51 fnstsw ax
52 test ah, 4
53 jnz .again
54
55 fstp st0
56 fcos
57
58.done:
59 leave
60 ret
61ENDPROC RT_NOCRT(cosl)
62
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