diff options
Diffstat (limited to 'sysdeps/hppa/fpu/feupdateenv.c')
-rw-r--r-- | sysdeps/hppa/fpu/feupdateenv.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/sysdeps/hppa/fpu/feupdateenv.c b/sysdeps/hppa/fpu/feupdateenv.c new file mode 100644 index 0000000000..345559edab --- /dev/null +++ b/sysdeps/hppa/fpu/feupdateenv.c @@ -0,0 +1,55 @@ +/* Install given floating-point environment and raise exceptions. + Copyright (C) 2000-2015 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by David Huggins-Daines <dhd@debian.org>, 2000 + + 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 <string.h> + +int +__feupdateenv (const fenv_t *envp) +{ + union { unsigned long long l; unsigned int sw[2]; } s; + fenv_t temp; + /* Get the current exception status */ + __asm__ ("fstd %%fr0,0(%1) \n\t" + "fldd 0(%1),%%fr0 \n\t" + : "=m" (s.l) : "r" (&s.l)); + + /* Given environment with exception flags not cleared. */ + if ((envp != FE_DFL_ENV) && (envp != FE_NOMASK_ENV)) + { + memcpy(&temp, envp, sizeof(fenv_t)); + temp.__status_word |= s.sw[0] & (FE_ALL_EXCEPT << 27); + } + + /* Default environment with exception flags not cleared. */ + if (envp == FE_DFL_ENV) + temp.__status_word = s.sw[0] & (FE_ALL_EXCEPT << 27); + + /* All traps enabled and current exception flags not cleared. */ + if (envp == FE_NOMASK_ENV) + temp.__status_word = (s.sw[0] & (FE_ALL_EXCEPT << 27)) | FE_ALL_EXCEPT; + + /* Install new environment. */ + __fesetenv (&temp); + /* Success. */ + return 0; +} +libm_hidden_def (__feupdateenv) +weak_alias (__feupdateenv, feupdateenv) +libm_hidden_weak (feupdateenv) |