1/*
2 * Copyright (C) 2001 Free Software Foundation, Inc.
3 * Contributed by David S. Miller (davem@redhat.com)
4 *
5 * This file is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by the
7 * Free Software Foundation; either version 2, or (at your option) any
8 * later version.
9 *
10 * In addition to the permissions in the GNU General Public License, the
11 * Free Software Foundation gives you unlimited permission to link the
12 * compiled version of this file with other programs, and to distribute
13 * those programs without any restriction coming from the use of this
14 * file.  (The General Public License restrictions do apply in other
15 * respects; for example, they cover modification of the file, and
16 * distribution when not linked into another program.)
17 *
18 * This file is distributed in the hope that it will be useful, but
19 * WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
21 * General Public License for more details.
22 *
23 * You should have received a copy of the GNU General Public License
24 * along with this program; see the file COPYING.  If not, write to
25 * the Free Software Foundation, 51 Franklin Street, Fifth Floor,
26 * Boston, MA 02110-1301, USA.
27 *
28 *    As a special exception, if you link this library with files
29 *    compiled with GCC to produce an executable, this does not cause
30 *    the resulting executable to be covered by the GNU General Public License.
31 *    This exception does not however invalidate any other reasons why
32 *    the executable file might be covered by the GNU General Public License.
33 */
34
35#define FPRS_NS		(1 << 22)	/* Non-Standard fpu results */
36
37static void __attribute__((constructor))
38set_fast_math (void)
39{
40  unsigned int fsr;
41
42  /* This works for the 64-bit case because, even if 32-bit ld/st of
43     the fsr register modified the upper 32-bit, the only thing up there
44     are the 3 other condition codes which are "do not care" at the time
45     that this runs.  */
46
47  __asm__("st %%fsr, %0"
48	  : "=m" (fsr));
49
50  fsr |= FPRS_NS;
51
52  __asm__("ld %0, %%fsr"
53	  : : "m" (fsr));
54}
55