2 * Copyright (C) 2007 Free Software Foundation, Inc.
4 * This file is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the
6 * Free Software Foundation; either version 2, or (at your option) any
9 * In addition to the permissions in the GNU General Public License, the
10 * Free Software Foundation gives you unlimited permission to link the
11 * compiled version of this file with other programs, and to distribute
12 * those programs without any restriction coming from the use of this
13 * file. (The General Public License restrictions do apply in other
14 * respects; for example, they cover modification of the file, and
15 * distribution when not linked into another program.)
17 * This file 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.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; see the file COPYING. If not, write to
24 * the Free Software Foundation, 51 Franklin Street, Fifth Floor,
25 * Boston, MA 02110-1301, USA.
27 * As a special exception, if you link this library with files
28 * compiled with GCC to produce an executable, this does not cause
29 * the resulting executable to be covered by the GNU General Public License.
30 * This exception does not however invalidate any other reasons why
31 * the executable file might be covered by the GNU General Public License.
35 #define X87CW (0 << 8) /* Single precision (24 bits) */
37 #define X87CW (2 << 8) /* Double precision (53 bits) */
39 #define X87CW (3 << 8) /* Extended precision (64 bits) */
41 #error "Wrong precision requested."
44 #define X87CW_PCMASK (3 << 8)
46 static void __attribute__((constructor
))
49 unsigned short int cwd
;
51 asm volatile ("fstcw\t%0" : "=m" (cwd
));
56 asm volatile ("fldcw\t%0" : : "m" (cwd
));