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| author | Gabriel F. T. Gomes <gftg@linux.vnet.ibm.com> | 2016-12-15 16:41:58 -0200 |
|---|---|---|
| committer | Gabriel F. T. Gomes <gftg@linux.vnet.ibm.com> | 2017-02-23 11:28:50 -0300 |
| commit | aec0821ce78e5f006ed45c063b4a129292bb739a (patch) | |
| tree | fdbe3af878af58185d0fe0bb036d5876d2d521a6 /math/w_log2_template.c | |
| parent | 63e1c3768dad1b6e1ea6b46108da236792228fe4 (diff) | |
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Add new templates for IEEE wrappers
Several wrappers for IEEE functions use _LIB_VERSION / matherr /
__kernel_standard functionality, which we want to obsolete. New
wrappers, such as for float128, must not use this functionality.
This patch adds new wrappers that only __set_errno and can be used by
the new float128 wrappers.
Tested for powerpc64le.
* math/Makefile: Add wrappers to gen-libm-calls.
* math/w_acos_template.c: New file.
* math/w_acosh_template.c: Likewise.
* math/w_asin_template.c: Likewise.
* math/w_atan2_template.c: Likewise.
* math/w_atanh_template.c: Likewise.
* math/w_cosh_template.c: Likewise.
* math/w_exp10_template.c: Likewise.
* math/w_exp2_template.c: Likewise.
* math/w_exp_template.c: Likewise.
* math/w_fmod_template.c: Likewise.
* math/w_hypot_template.c: Likewise.
* math/w_j0_template.c: Likewise.
* math/w_j1_template.c: Likewise.
* math/w_jn_template.c: Likewise.
* math/w_lgamma_r_template.c: Likewise.
* math/w_lgamma_template.c: Likewise.
* math/w_log10_template.c: Likewise.
* math/w_log2_template.c: Likewise.
* math/w_log_template.c: Likewise.
* math/w_pow_template.c: Likewise.
* math/w_remainder_template.c: Likewise.
* math/w_sinh_template.c: Likewise.
* math/w_sqrt_template.c: Likewise.
* math/w_tgamma_template.c: Likewise.: Likewise.
* sysdeps/generic/math-type-macros-double.h
(__USE_WRAPPER_TEMPLATE): New macro to control inclusion of
the new wrappers.
* sysdeps/generic/math-type-macros-float.h: Likewise.
* sysdeps/generic/math-type-macros-ldouble.h: Likewise.
Diffstat (limited to 'math/w_log2_template.c')
| -rw-r--r-- | math/w_log2_template.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/math/w_log2_template.c b/math/w_log2_template.c new file mode 100644 index 0000000000..a80b287da6 --- /dev/null +++ b/math/w_log2_template.c @@ -0,0 +1,44 @@ +/* Wrapper to set errno for log2. + Copyright (C) 2017 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/>. */ + +/* Only build wrappers from the templates for the types that define the macro + below. This macro is set in math-type-macros-<type>.h in sysdeps/generic + for each floating-point type. */ +#if __USE_WRAPPER_TEMPLATE + +# include <fenv.h> +# include <math.h> +# include <math_private.h> + +FLOAT +M_DECL_FUNC (__log2) (FLOAT x) +{ + if (__glibc_unlikely (islessequal (x, M_LIT (0.0)))) + { + if (x == 0) + /* Pole error: log2(0). */ + __set_errno (ERANGE); + else + /* Domain error: log2(<0). */ + __set_errno (EDOM); + } + return M_SUF (__ieee754_log2) (x); +} +declare_mgen_alias (__log2, log2) + +#endif /* __USE_WRAPPER_TEMPLATE. */ |