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1/* Install given floating-point control modes. Alpha version.
2 Copyright (C) 2016-2019 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19#include <fenv_libc.h>
20
21int
22fesetmode (const femode_t *modep)
23{
24 unsigned long int fpcr;
25 unsigned long int swcr;
26 femode_t mode;
27
28 /* As in fesetenv. */
29 if ((long int) modep >= 0)
30 mode = *modep;
31 else
32 mode = (unsigned long int) modep;
33
34 __asm__ __volatile__ ("excb; mf_fpcr %0" : "=f" (fpcr));
35 fpcr = (fpcr & ~FPCR_ROUND_MASK) | (mode & FPCR_ROUND_MASK);
36 __asm__ __volatile__ ("mt_fpcr %0" : : "f" (fpcr));
37
38 swcr = __ieee_get_fp_control ();
39 swcr = ((mode & SWCR_ALL_MASK & ~SWCR_STATUS_MASK)
40 | (swcr & SWCR_STATUS_MASK));
41 __ieee_set_fp_control (swcr);
42
43 return 0;
44}
45

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