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author | Gabriel F. T. Gomes <gftg@linux.vnet.ibm.com> | 2016-12-15 16:41:58 -0200 |
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committer | Gabriel F. T. Gomes <gftg@linux.vnet.ibm.com> | 2017-02-23 11:28:50 -0300 |
commit | aec0821ce78e5f006ed45c063b4a129292bb739a (patch) | |
tree | fdbe3af878af58185d0fe0bb036d5876d2d521a6 /math/w_tgamma_template.c | |
parent | 63e1c3768dad1b6e1ea6b46108da236792228fe4 (diff) | |
download | glibc-aec0821ce78e5f006ed45c063b4a129292bb739a.zip glibc-aec0821ce78e5f006ed45c063b4a129292bb739a.tar.gz glibc-aec0821ce78e5f006ed45c063b4a129292bb739a.tar.bz2 |
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_tgamma_template.c')
-rw-r--r-- | math/w_tgamma_template.c | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/math/w_tgamma_template.c b/math/w_tgamma_template.c new file mode 100644 index 0000000..277a837 --- /dev/null +++ b/math/w_tgamma_template.c @@ -0,0 +1,54 @@ +/* Wrapper to set errno for tgamma. + 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> + +#define M_CALL_FUNC_X(x) x ## _r +#define M_CALL_FUNC(x) M_CALL_FUNC_X (x) + +FLOAT +M_DECL_FUNC (__tgamma) (FLOAT x) +{ + int local_signgam; + FLOAT y = M_CALL_FUNC (M_SUF (__ieee754_gamma)) (x, &local_signgam); + + if (__glibc_unlikely (!isfinite (y) || y == 0) + && (isfinite (x) || (isinf (x) && x < 0))) + { + if (x == 0) + /* Pole error: tgamma(x=0). */ + __set_errno (ERANGE); + else if (M_SUF (__floor) (x) == x && x < 0) + /* Domain error: tgamma(integer x<0). */ + __set_errno (EDOM); + else + /* Overflow or underflow. */ + __set_errno (ERANGE); + } + return local_signgam < 0 ? -y : y; +} +declare_mgen_alias (__tgamma, tgamma) + +#endif /* __USE_WRAPPER_TEMPLATE. */ |