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1f205a47 | 1 | /* Set floating-point environment exception handling. |
04277e02 | 2 | Copyright (C) 1997-2019 Free Software Foundation, Inc. |
1f205a47 UD |
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 | |
41bdb6e2 AJ |
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. | |
1f205a47 UD |
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 | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
1f205a47 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
1f205a47 UD |
18 | |
19 | #include <fenv_libc.h> | |
20 | ||
63ae7b63 UD |
21 | int |
22 | __fesetexceptflag (const fexcept_t *flagp, int excepts) | |
1f205a47 | 23 | { |
18f2945a | 24 | fenv_union_t u, n; |
0413b54c | 25 | fexcept_t flag; |
1f205a47 UD |
26 | |
27 | /* Get the current state. */ | |
28 | u.fenv = fegetenv_register (); | |
29 | ||
0413b54c UD |
30 | /* Ignore exceptions not listed in 'excepts'. */ |
31 | flag = *flagp & excepts; | |
32 | ||
1f205a47 | 33 | /* Replace the exception status */ |
f7921179 JM |
34 | int excepts_mask = FPSCR_STICKY_BITS & excepts; |
35 | if ((excepts & FE_INVALID) != 0) | |
36 | excepts_mask |= FE_ALL_INVALID; | |
37 | n.l = ((u.l & ~excepts_mask) | |
4a28b3ca | 38 | | (flag & FPSCR_STICKY_BITS) |
3f0eeddd | 39 | /* Turn FE_INVALID into FE_INVALID_SOFTWARE. */ |
4a28b3ca AB |
40 | | (flag >> ((31 - FPSCR_VX) - (31 - FPSCR_VXSOFT)) |
41 | & FE_INVALID_SOFTWARE)); | |
1f205a47 UD |
42 | |
43 | /* Store the new status word (along with the rest of the environment). | |
44 | This may cause floating-point exceptions if the restored state | |
45 | requests it. */ | |
18f2945a | 46 | if (n.l != u.l) |
d4d0ecb2 | 47 | fesetenv_register (n.fenv); |
0413b54c UD |
48 | |
49 | /* Deal with FE_INVALID_SOFTWARE not being implemented on some chips. */ | |
50 | if (flag & FE_INVALID) | |
51 | feraiseexcept(FE_INVALID); | |
63ae7b63 UD |
52 | |
53 | /* Success. */ | |
54 | return 0; | |
1f205a47 | 55 | } |
4eb8a862 RM |
56 | |
57 | #include <shlib-compat.h> | |
58 | #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2) | |
63ae7b63 | 59 | strong_alias (__fesetexceptflag, __old_fesetexceptflag) |
e97ed6dd | 60 | compat_symbol (libm, __old_fesetexceptflag, fesetexceptflag, GLIBC_2_1); |
4eb8a862 RM |
61 | #endif |
62 | ||
e97ed6dd | 63 | versioned_symbol (libm, __fesetexceptflag, fesetexceptflag, GLIBC_2_2); |