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1 | /* Clear given exceptions in current floating-point environment. |
2 | Copyright (C) 1998, 1999, 2000, 2002, 2004 Free Software Foundation, Inc. | |
3 | This file is part of the GNU C Library. | |
4 | Contributed by Alexandre Oliva <aoliva@redhat.com> | |
5 | based on corresponding file in the MIPS port. | |
6 | ||
7 | The GNU C Library is free software; you can redistribute it and/or | |
8 | modify it under the terms of the GNU Lesser General Public | |
9 | License as published by the Free Software Foundation; either | |
10 | version 2.1 of the License, or (at your option) any later version. | |
11 | ||
12 | The GNU C Library is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | Lesser General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU Lesser General Public | |
ab84e3ff PE |
18 | License along with the GNU C Library. If not, see |
19 | <http://www.gnu.org/licenses/>. */ | |
d115c0d8 AO |
20 | |
21 | #include <fenv.h> | |
22 | #include <fenv_libc.h> | |
23 | #include <fpu_control.h> | |
24 | #include <shlib-compat.h> | |
25 | ||
26 | int | |
27 | __feclearexcept (int excepts) | |
28 | { | |
29 | fpu_control_t cw; | |
30 | ||
31 | /* Mask out unsupported bits/exceptions. */ | |
32 | excepts &= FE_ALL_EXCEPT; | |
33 | ||
34 | /* Read the complete control word. */ | |
35 | _FPU_GETCW (cw); | |
36 | ||
37 | /* Clear exception flag bits and cause bits. EF bits are cleared by | |
38 | assigning 1 to them (and there's no way to set them); other bits | |
39 | are copied normally. */ | |
40 | ||
41 | cw &= ~((excepts << CAUSE_SHIFT) | FE_ALL_EXCEPT); | |
42 | cw |= excepts; | |
43 | ||
44 | /* Put the new data in effect. */ | |
45 | _FPU_SETFCW (cw); | |
46 | ||
47 | /* Success. */ | |
48 | return 0; | |
49 | } | |
50 | ||
51 | versioned_symbol (libm, __feclearexcept, feclearexcept, GLIBC_2_2); |