| /* Install given floating-point environment. |
| Copyright (C) 1997-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Richard Henderson <rth@tamu.edu>, 1997 |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library. If not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <fenv_libc.h> |
| |
| int |
| __fesetenv (const fenv_t *envp) |
| { |
| unsigned long int fpcr; |
| fenv_t env; |
| |
| /* Magic encoding of default values: high bit set (never possible for a |
| user-space address) is not indirect. And we don't even have to get |
| rid of it since we mask things around just below. */ |
| if ((long int) envp >= 0) |
| env = *envp; |
| else |
| env = (unsigned long int) envp; |
| |
| /* Reset the rounding mode with the hardware fpcr. Note that the following |
| system call is an implied trap barrier for our modification. */ |
| __asm__ __volatile__ ("excb; mf_fpcr %0" : "=f" (fpcr)); |
| fpcr = (fpcr & ~FPCR_ROUND_MASK) | (env & FPCR_ROUND_MASK); |
| __asm__ __volatile__ ("mt_fpcr %0" : : "f" (fpcr)); |
| |
| /* Reset the exception status and mask with the kernel's FP code. */ |
| __ieee_set_fp_control (env & SWCR_ALL_MASK); |
| |
| /* Success. */ |
| return 0; |
| } |
| |
| #include <shlib-compat.h> |
| #if SHLIB_COMPAT (libm, GLIBC_2_1, GLIBC_2_2) |
| strong_alias (__fesetenv, __old_fesetenv) |
| compat_symbol (libm, __old_fesetenv, fesetenv, GLIBC_2_1); |
| #endif |
| |
| libm_hidden_ver (__fesetenv, fesetenv) |
| versioned_symbol (libm, __fesetenv, fesetenv, GLIBC_2_2); |
