| /* Install given floating-point environment. |
| Copyright (C) 1997-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| Contributed by Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> |
| |
| 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> |
| |
| int |
| __fesetenv (const fenv_t *envp) |
| { |
| fenv_t temp; |
| |
| /* Install the environment specified by ENVP. But there are a few |
| values which we do not want to come from the saved environment. |
| Therefore, we get the current environment and replace the values |
| we want to use from the environment specified by the parameter. */ |
| #ifdef __mcoldfire__ |
| __asm__ ("fmove%.l %/fpcr,%0" : "=dm" (temp.__control_register)); |
| __asm__ ("fmove%.l %/fpsr,%0" : "=dm" (temp.__status_register)); |
| __asm__ ("fmove%.l %/fpiar,%0" : "=dm" (temp.__instruction_address)); |
| #else |
| __asm__ ("fmovem%.l %/fpcr/%/fpsr/%/fpiar,%0" : "=m" (*&temp)); |
| #endif |
| |
| temp.__status_register &= ~FE_ALL_EXCEPT; |
| temp.__control_register &= ~((FE_ALL_EXCEPT << 6) | FE_UPWARD); |
| if (envp == FE_DFL_ENV) |
| ; |
| else if (envp == FE_NOMASK_ENV) |
| temp.__control_register |= FE_ALL_EXCEPT << 6; |
| else |
| { |
| temp.__control_register |= (envp->__control_register |
| & ((FE_ALL_EXCEPT << 6) | FE_UPWARD)); |
| temp.__status_register |= envp->__status_register & FE_ALL_EXCEPT; |
| } |
| |
| #ifdef __mcoldfire__ |
| __asm__ __volatile__ ("fmove%.l %0,%/fpiar" |
| :: "dm" (temp.__instruction_address)); |
| __asm__ __volatile__ ("fmove%.l %0,%/fpcr" |
| :: "dm" (temp.__control_register)); |
| __asm__ __volatile__ ("fmove%.l %0,%/fpsr" |
| :: "dm" (temp.__status_register)); |
| #else |
| __asm__ __volatile__ ("fmovem%.l %0,%/fpcr/%/fpsr/%/fpiar" : : "m" (*&temp)); |
| #endif |
| |
| /* 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); |