| /* Install given floating-point environment. |
| Copyright (C) 1998-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Alexandre Oliva <aoliva@redhat.com> |
| based on corresponding file in the MIPS port. |
| |
| 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.h> |
| #include <fpu_control.h> |
| #include <shlib-compat.h> |
| |
| int |
| __fesetenv (const fenv_t *envp) |
| { |
| fpu_control_t cw; |
| |
| /* We want to clear all EF bits for the default end IEEE. */ |
| |
| if (envp == FE_DFL_ENV) |
| _FPU_SETFCW (_FPU_DEFAULT|FE_ALL_EXCEPT); |
| else if (envp == FE_NOMASK_ENV) |
| _FPU_SETFCW (_FPU_IEEE|FE_ALL_EXCEPT); |
| else |
| { |
| fpu_control_t temp; |
| |
| _FPU_GETCW (temp); |
| cw = *envp; |
| |
| /* If EF bits are cleared and the user requests them to be set, |
| we have to fail, because there's no way to do it. */ |
| if (~temp & cw & FE_ALL_EXCEPT) |
| return -1; |
| |
| /* We clear EF bits by storing a 1 in them, so flip the |
| FE_ALL_EXCEPT bits. */ |
| cw = (cw & ~FE_ALL_EXCEPT) | (~cw & FE_ALL_EXCEPT); |
| _FPU_SETFCW (cw); |
| } |
| |
| /* Success. */ |
| return 0; |
| } |
| |
| libm_hidden_ver (__fesetenv, fesetenv) |
| versioned_symbol (libm, __fesetenv, fesetenv, GLIBC_2_2); |
