5ed37f2a894ff99c23292929e7e52bd7932b507d
[reactos.git] / reactos / lib / crt / math / log10.c
1 /* Math functions for i387.
2 Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by John C. Bowman <bowman@ipp-garching.mpg.de>, 1995.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Library General Public License as
8 published by the Free Software Foundation; either version 2 of the
9 License, or (at your option) any later version.
10
11 The GNU C Library is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Library General Public License for more details.
15
16 You should have received a copy of the GNU Library General Public
17 License along with the GNU C Library; see the file COPYING.LIB. If not,
18 write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
20
21 #include <math.h>
22
23 double log10 (double __x);
24
25 double log10 (double __x)
26 {
27 register double __value;
28 #ifdef __GNUC__
29 __asm __volatile__
30 ("fldlg2\n\t"
31 "fxch\n\t"
32 "fyl2x"
33 : "=t" (__value) : "0" (__x));
34 #else
35 __value = linkme_log10(__x);
36 #endif /*__GNUC__*/
37 return __value;
38 }