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author | Joseph Myers <joseph@codesourcery.com> | 2013-10-18 21:03:40 +0000 |
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committer | Joseph Myers <joseph@codesourcery.com> | 2013-10-18 21:04:22 +0000 |
commit | 3c8325fb47c3688cc7d9b70ada2ec71fb0eb219a (patch) | |
tree | eb315c426bd9c1f5aa42f40f6e9e74f2d7aabcd3 /sysdeps/powerpc/powerpc32/e500/nofpu/fedisblxcpt.c | |
parent | 289528850de3c197821e0b670b23980ff8b4d538 (diff) | |
download | glibc-3c8325fb47c3688cc7d9b70ada2ec71fb0eb219a.tar.gz glibc-3c8325fb47c3688cc7d9b70ada2ec71fb0eb219a.tar.xz glibc-3c8325fb47c3688cc7d9b70ada2ec71fb0eb219a.zip |
Add e500 port.
Diffstat (limited to 'sysdeps/powerpc/powerpc32/e500/nofpu/fedisblxcpt.c')
-rw-r--r-- | sysdeps/powerpc/powerpc32/e500/nofpu/fedisblxcpt.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/sysdeps/powerpc/powerpc32/e500/nofpu/fedisblxcpt.c b/sysdeps/powerpc/powerpc32/e500/nofpu/fedisblxcpt.c new file mode 100644 index 0000000000..7cc963c019 --- /dev/null +++ b/sysdeps/powerpc/powerpc32/e500/nofpu/fedisblxcpt.c @@ -0,0 +1,54 @@ +/* Disable floating-point exceptions. e500 version. + Copyright (C) 2004-2013 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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_libc.h> +#include <sysdep.h> +#include <sys/prctl.h> + +int +fedisableexcept (int excepts) +{ + int result = 0, pflags, r; + INTERNAL_SYSCALL_DECL (err); + + r = INTERNAL_SYSCALL (prctl, err, 2, PR_GET_FPEXC, &pflags); + if (INTERNAL_SYSCALL_ERROR_P (r, err)) + return -1; + + /* Save old enable bits. */ + result = __fexcepts_from_prctl (pflags); + + pflags &= ~__fexcepts_to_prctl (excepts); + r = INTERNAL_SYSCALL (prctl, err, 2, PR_SET_FPEXC, + pflags | PR_FP_EXC_SW_ENABLE); + if (INTERNAL_SYSCALL_ERROR_P (r, err)) + return -1; + + /* If disabling signals for "inexact", also disable trapping to the + kernel. */ + if ((excepts & FE_INEXACT) != 0) + { + unsigned long fpescr; + + fpescr = fegetenv_register (); + fpescr &= ~SPEFSCR_FINXE; + fesetenv_register (fpescr); + } + + return result; +} |