| /* Store current floating-point environment and clear exceptions. |
| Copyright (C) 1997-2018 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 |
| __feholdexcept (fenv_t *envp) |
| { |
| fexcept_t fpcr, fpsr; |
| |
| /* Store the environment. */ |
| #ifdef __mcoldfire__ |
| __asm__ ("fmove%.l %/fpcr,%0" : "=dm" (envp->__control_register)); |
| __asm__ ("fmove%.l %/fpsr,%0" : "=dm" (envp->__status_register)); |
| __asm__ ("fmove%.l %/fpiar,%0" : "=dm" (envp->__instruction_address)); |
| #else |
| __asm__ ("fmovem%.l %/fpcr/%/fpsr/%/fpiar,%0" : "=m" (*envp)); |
| #endif |
| |
| /* Now clear all exceptions. */ |
| fpsr = envp->__status_register & ~FE_ALL_EXCEPT; |
| __asm__ __volatile__ ("fmove%.l %0,%/fpsr" : : "dm" (fpsr)); |
| /* And set all exceptions to non-stop. */ |
| fpcr = envp->__control_register & ~(FE_ALL_EXCEPT << 6); |
| __asm__ __volatile__ ("fmove%.l %0,%!" : : "dm" (fpcr)); |
| |
| return 0; |
| } |
| libm_hidden_def (__feholdexcept) |
| weak_alias (__feholdexcept, feholdexcept) |
| libm_hidden_weak (feholdexcept) |
