diff options
Diffstat (limited to 'sysdeps/hppa/fpu/fesetenv.c')
| -rw-r--r-- | sysdeps/hppa/fpu/fesetenv.c | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/sysdeps/hppa/fpu/fesetenv.c b/sysdeps/hppa/fpu/fesetenv.c new file mode 100644 index 0000000000..4bfbefdd9b --- /dev/null +++ b/sysdeps/hppa/fpu/fesetenv.c @@ -0,0 +1,70 @@ +/* Install given floating-point environment. + Copyright (C) 1997, 1999, 2000 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by David Huggins-Daines <dhd@debian.org>, 2000 + Based on the m68k version by + Andreas Schwab <schwab@suse.de> + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public License as + published by the Free Software Foundation; either version 2 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ + +#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. */ + { + fenv_t * _regs = &temp; + __asm__ ( + "fstd %%fr0,0(%2)\n" + "fstd,ma %%fr1,8(%2)\n" + "fstd,ma %%fr2,8(%2)\n" + "fstd %%fr3,0(%2)\n" + : "=m" (*_regs), "=r" (_regs) : "1" (_regs)); + } + + temp.__status_word &= ~(FE_ALL_EXCEPT + | (FE_ALL_EXCEPT << 27) + | FE_DOWNWARD); + if (envp == FE_DFL_ENV) + ; + else if (envp == FE_NOMASK_ENV) + temp.__status_word |= FE_ALL_EXCEPT; + else + temp.__status_word |= (envp->__status_word + & (FE_ALL_EXCEPT + | FE_DOWNWARD + | (FE_ALL_EXCEPT << 27))); + + /* Load the new environment. */ + { + fenv_t * _regs = &temp + 1; + __asm__ ( + "fldd,mb -8(%2),%%fr3\n" + "fldd,mb -8(%2),%%fr2\n" + "fldd,mb -8(%2),%%fr1\n" + "fldd -8(%2),%%fr0\n" + : "=m" (*_regs), "=r" (_regs) : "1" (_regs)); + } + + /* Success. */ + return 0; +} |