diff options
author | Ben Cheng <bccheng@google.com> | 2014-03-25 22:37:19 -0700 |
---|---|---|
committer | Ben Cheng <bccheng@google.com> | 2014-03-25 22:37:19 -0700 |
commit | 1bc5aee63eb72b341f506ad058502cd0361f0d10 (patch) | |
tree | c607e8252f3405424ff15bc2d00aa38dadbb2518 /gcc-4.9/libatomic/fenv.c | |
parent | 283a0bf58fcf333c58a2a92c3ebbc41fb9eb1fdb (diff) | |
download | toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.tar.gz toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.tar.bz2 toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.zip |
Initial checkin of GCC 4.9.0 from trunk (r208799).
Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba
Diffstat (limited to 'gcc-4.9/libatomic/fenv.c')
-rw-r--r-- | gcc-4.9/libatomic/fenv.c | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/gcc-4.9/libatomic/fenv.c b/gcc-4.9/libatomic/fenv.c new file mode 100644 index 000000000..435d53a87 --- /dev/null +++ b/gcc-4.9/libatomic/fenv.c @@ -0,0 +1,72 @@ +/* Copyright (C) 2012-2014 Free Software Foundation, Inc. + + This file is part of the GNU Atomic Library (libatomic). + + Libatomic is free software; you can redistribute it and/or modify it + under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + Libatomic 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 General Public License for + more details. + + Under Section 7 of GPL version 3, you are granted additional + permissions described in the GCC Runtime Library Exception, version + 3.1, as published by the Free Software Foundation. + + You should have received a copy of the GNU General Public License and + a copy of the GCC Runtime Library Exception along with this program; + see the files COPYING3 and COPYING.RUNTIME respectively. If not, see + <http://www.gnu.org/licenses/>. */ + +#include "libatomic_i.h" + +#ifdef HAVE_FENV_H +# include <fenv.h> +#endif + +/* Raise the supported floating-point exceptions from EXCEPTS. Other + bits in EXCEPTS are ignored. */ + +void +__atomic_feraiseexcept (int excepts __attribute__ ((unused))) +{ + volatile float r __attribute__ ((unused)); +#ifdef FE_INVALID + if (excepts & FE_INVALID) + { + volatile float zero = 0.0f; + r = zero / zero; + } +#endif +#ifdef FE_DIVBYZERO + if (excepts & FE_DIVBYZERO) + { + volatile float zero = 0.0f; + r = 1.0f / zero; + } +#endif +#ifdef FE_OVERFLOW + if (excepts & FE_OVERFLOW) + { + volatile float max = __FLT_MAX__; + r = max * max; + } +#endif +#ifdef FE_UNDERFLOW + if (excepts & FE_UNDERFLOW) + { + volatile float min = __FLT_MIN__; + r = min * min; + } +#endif +#ifdef FE_INEXACT + if (excepts & FE_INEXACT) + { + volatile float three = 3.0f; + r = 1.0f / three; + } +#endif +} |