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1f205a47 | 1 | /* Raise given exceptions. |
f7a9f785 | 2 | Copyright (C) 1997-2016 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 PE |
16 | License along with the GNU C Library; if not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
1f205a47 UD |
18 | |
19 | #include <fenv_libc.h> | |
20 | ||
0413b54c | 21 | #undef feraiseexcept |
63ae7b63 UD |
22 | int |
23 | __feraiseexcept (int excepts) | |
1f205a47 UD |
24 | { |
25 | fenv_union_t u; | |
26 | ||
27 | /* Raise exceptions represented by EXCEPTS. It is the responsibility of | |
28 | the OS to ensure that if multiple exceptions occur they are fed back | |
29 | to this process in the proper way; this can happen in hardware, | |
30 | anyway (in particular, inexact with overflow or underflow). */ | |
31 | ||
32 | /* Get the current state. */ | |
33 | u.fenv = fegetenv_register (); | |
34 | ||
35 | /* Add the exceptions */ | |
4a28b3ca AB |
36 | u.l = (u.l |
37 | | (excepts & FPSCR_STICKY_BITS) | |
38 | /* Turn FE_INVALID into FE_INVALID_SOFTWARE. */ | |
39 | | (excepts >> ((31 - FPSCR_VX) - (31 - FPSCR_VXSOFT)) | |
40 | & FE_INVALID_SOFTWARE)); | |
1f205a47 UD |
41 | |
42 | /* Store the new status word (along with the rest of the environment), | |
43 | triggering any appropriate exceptions. */ | |
44 | fesetenv_register (u.fenv); | |
0413b54c | 45 | |
246ec411 UD |
46 | if ((excepts & FE_INVALID)) |
47 | { | |
0413b54c UD |
48 | /* For some reason, some PowerPC chips (the 601, in particular) |
49 | don't have FE_INVALID_SOFTWARE implemented. Detect this | |
50 | case and raise FE_INVALID_SNAN instead. */ | |
246ec411 | 51 | u.fenv = fegetenv_register (); |
4a28b3ca | 52 | if ((u.l & FE_INVALID) == 0) |
246ec411 UD |
53 | set_fpscr_bit (FPSCR_VXSNAN); |
54 | } | |
63ae7b63 UD |
55 | |
56 | /* Success. */ | |
57 | return 0; | |
1f205a47 | 58 | } |
4eb8a862 RM |
59 | |
60 | #include <shlib-compat.h> | |
61 | #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2) | |
63ae7b63 | 62 | strong_alias (__feraiseexcept, __old_feraiseexcept) |
e97ed6dd | 63 | compat_symbol (libm, __old_feraiseexcept, feraiseexcept, GLIBC_2_1); |
4eb8a862 RM |
64 | #endif |
65 | ||
0747f818 | 66 | libm_hidden_def (__feraiseexcept) |
76f2646f | 67 | libm_hidden_ver (__feraiseexcept, feraiseexcept) |
e97ed6dd | 68 | versioned_symbol (libm, __feraiseexcept, feraiseexcept, GLIBC_2_2); |