1/* Return current rounding direction.
2 Copyright (C) 1997-2021 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4 Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
5
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the 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 Lesser General Public License for more details.
15
16 You should have received a copy of the GNU Lesser General Public
17 License along with the GNU C Library; if not, see
18 <https://www.gnu.org/licenses/>. */
19
20#include <fenv.h>
21
22int
23__fegetround (void)
24{
25 int cw;
26 /* We only check the x87 FPU unit. The SSE unit should be the same
27 - and if it's not the same there's no way to signal it. */
28
29 __asm__ ("fnstcw %0" : "=m" (*&cw));
30
31 return cw & 0xc00;
32}
33libm_hidden_def (__fegetround)
34weak_alias (__fegetround, fegetround)
35libm_hidden_weak (fegetround)
36