diff options
Diffstat (limited to 'REORG.TODO/sysdeps/hppa/fpu/fesetenv.c')
| -rw-r--r-- | REORG.TODO/sysdeps/hppa/fpu/fesetenv.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/hppa/fpu/fesetenv.c b/REORG.TODO/sysdeps/hppa/fpu/fesetenv.c new file mode 100644 index 0000000000..24f84f215a --- /dev/null +++ b/REORG.TODO/sysdeps/hppa/fpu/fesetenv.c @@ -0,0 +1,65 @@ +/* Install given floating-point environment. + Copyright (C) 1997-2017 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 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) +{ + union { unsigned long long buf[4]; fenv_t env; } temp; + unsigned long long *bufptr; + + /* 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. */ + bufptr = temp.buf; + __asm__ ( + "fstd %%fr0,0(%1)\n" + : "=m" (temp) : "r" (bufptr) : "%r0"); + + temp.env.__status_word &= ~(FE_ALL_EXCEPT + | (FE_ALL_EXCEPT << 27) + | FE_DOWNWARD); + if (envp == FE_DFL_ENV) + temp.env.__status_word = 0; + else if (envp == FE_NOMASK_ENV) + temp.env.__status_word |= FE_ALL_EXCEPT; + else + temp.env.__status_word |= (envp->__status_word + & (FE_ALL_EXCEPT + | FE_DOWNWARD + | (FE_ALL_EXCEPT << 27))); + + /* Load the new environment. We use bufptr again since the + initial asm has modified the value of the register and here + we take advantage of that to load in reverse order so fr0 + is loaded last and T-Bit is enabled. */ + __asm__ ( + "fldd 0(%1),%%fr0\n" + : : "m" (temp), "r" (bufptr) : "%r0" ); + + /* Success. */ + return 0; +} +libm_hidden_def (__fesetenv) +weak_alias (__fesetenv, fesetenv) +libm_hidden_weak (fesetenv) |