]>
Commit | Line | Data |
---|---|---|
63551311 | 1 | /* Store current floating-point environment. |
b168057a | 2 | Copyright (C) 1997-2015 Free Software Foundation, Inc. |
63551311 UD |
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 | |
41bdb6e2 AJ |
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. | |
63551311 UD |
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 | |
41bdb6e2 | 14 | Lesser General Public License for more details. |
63551311 | 15 | |
41bdb6e2 | 16 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 PE |
17 | License along with the GNU C Library; if not, see |
18 | <http://www.gnu.org/licenses/>. */ | |
63551311 UD |
19 | |
20 | #include <fenv.h> | |
77d08aca JM |
21 | #include <unistd.h> |
22 | #include <ldsodefs.h> | |
23 | #include <dl-procinfo.h> | |
63551311 | 24 | |
63ae7b63 UD |
25 | int |
26 | __fegetenv (fenv_t *envp) | |
63551311 UD |
27 | { |
28 | __asm__ ("fnstenv %0" : "=m" (*envp)); | |
24176967 UD |
29 | /* And load it right back since the processor changes the mask. |
30 | Intel thought this opcode to be used in interrupt handlers which | |
31 | would block all exceptions. */ | |
32 | __asm__ ("fldenv %0" : : "m" (*envp)); | |
63ae7b63 | 33 | |
77d08aca JM |
34 | if ((GLRO(dl_hwcap) & HWCAP_I386_XMM) != 0) |
35 | __asm__ ("stmxcsr %0" : "=m" (envp->__eip)); | |
36 | ||
63ae7b63 UD |
37 | /* Success. */ |
38 | return 0; | |
63551311 | 39 | } |
4eb8a862 RM |
40 | |
41 | #include <shlib-compat.h> | |
42 | #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2) | |
63ae7b63 | 43 | strong_alias (__fegetenv, __old_fegetenv) |
e97ed6dd | 44 | compat_symbol (libm, __old_fegetenv, fegetenv, GLIBC_2_1); |
4eb8a862 RM |
45 | #endif |
46 | ||
73a268c7 | 47 | libm_hidden_def (__fegetenv) |
7eb22e75 | 48 | libm_hidden_ver (__fegetenv, fegetenv) |
e97ed6dd | 49 | versioned_symbol (libm, __fegetenv, fegetenv, GLIBC_2_2); |