diff options
Diffstat (limited to 'libm/powerpc/e500/fpu/feholdexcpt.c')
-rw-r--r-- | libm/powerpc/e500/fpu/feholdexcpt.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/libm/powerpc/e500/fpu/feholdexcpt.c b/libm/powerpc/e500/fpu/feholdexcpt.c new file mode 100644 index 000000000..eccde4217 --- /dev/null +++ b/libm/powerpc/e500/fpu/feholdexcpt.c @@ -0,0 +1,45 @@ +/* Store current floating-point environment and clear exceptions. + Copyright (C) 2004, 2006 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Aldy Hernandez <aldyh@redhat.com>, 2004. + + 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#include "fenv_libc.h" +#include <syscall.h> +#include <sys/prctl.h> + +int +feholdexcept (fenv_t *envp) +{ + fenv_union_t u; + INTERNAL_SYSCALL_DECL (err); + + + /* Get the current state. */ + INTERNAL_SYSCALL (prctl, err, 2, PR_GET_FPEXC, &u.l[0]); + u.l[1] = fegetenv_register (); + *envp = u.fenv; + + /* Clear everything except for the rounding mode. */ + u.l[1] &= 3; + + /* Put the new state in effect. */ + fesetenv_register (u.l[1]); + + return 0; +} +libm_hidden_def (feholdexcept) |