diff options
Diffstat (limited to 'sysdeps/ieee754/float128/s_signbitf128.c')
-rw-r--r-- | sysdeps/ieee754/float128/s_signbitf128.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/sysdeps/ieee754/float128/s_signbitf128.c b/sysdeps/ieee754/float128/s_signbitf128.c new file mode 100644 index 0000000000..559df3b56c --- /dev/null +++ b/sysdeps/ieee754/float128/s_signbitf128.c @@ -0,0 +1,37 @@ +/* Return nonzero value if number is negative. + Copyright (C) 2017-2018 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 <float128_private.h> +#include <math.h> +#include <math_private.h> + +/* Once GCC >= 6.0 is required for building glibc, this implementation can + be removed and replaced with an inclusion of ldbl-128/s_signbitl.c. */ +int +__signbitf128 (_Float128 x) +{ +#if __GNUC_PREREQ (6, 0) + return __builtin_signbit (x); +#else + int64_t e; + + GET_FLOAT128_MSW64 (e, x); + return e < 0; +#endif +} +hidden_def (__signbitf128) |