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authorGabriel F. T. Gomes <gftg@linux.vnet.ibm.com>2016-12-15 16:41:58 -0200
committerGabriel F. T. Gomes <gftg@linux.vnet.ibm.com>2017-02-23 11:28:50 -0300
commitaec0821ce78e5f006ed45c063b4a129292bb739a (patch)
treefdbe3af878af58185d0fe0bb036d5876d2d521a6 /math/w_log2_template.c
parent63e1c3768dad1b6e1ea6b46108da236792228fe4 (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.c44
1 files changed, 44 insertions, 0 deletions
diff --git a/math/w_log2_template.c b/math/w_log2_template.c
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+/* 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. */