Add stub implementations of the missing C++11 math functions.
These are weak and so can be replaced by other versions in applications that choose to do so, and will give a linker warning when used so that applications that rely on the extra precision can avoid them. Note that since the C/C++ specs only guarantee that long double has precision equal to double, code that actually relies on these functions having greater precision is unportable at best and broken at worst.
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svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=255294
@ -53,6 +53,7 @@ COMMON_SRCS= b_exp.c b_log.c b_tgamma.c \
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e_pow.c e_powf.c e_rem_pio2.c \
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e_rem_pio2f.c e_remainder.c e_remainderf.c e_scalb.c e_scalbf.c \
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e_sinh.c e_sinhf.c e_sqrt.c e_sqrtf.c fenv.c \
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imprecise.c \
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k_cos.c k_cosf.c k_exp.c k_expf.c k_rem_pio2.c k_sin.c k_sinf.c \
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k_tan.c k_tanf.c \
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s_asinh.c s_asinhf.c s_atan.c s_atanf.c s_carg.c s_cargf.c s_cargl.c \
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@ -270,4 +270,13 @@ FBSD_1.3 {
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log1pl;
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log2l;
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logl;
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# Implemented as weak aliases for imprecise versions
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coshl;
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erfcl;
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erfl;
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lgammal;
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powl;
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sinhl;
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tanhl;
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tgammal;
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};
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69
lib/msun/src/imprecise.c
Normal file
69
lib/msun/src/imprecise.c
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@ -0,0 +1,69 @@
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/*-
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* Copyright (c) 2013 David Chisnall
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <float.h>
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#include <math.h>
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/*
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* If long double is not the same size as double, then these will lose
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* precision and we should emit a warning whenever something links against
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* them.
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*/
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#if (LDBL_MANT_DIG > 53)
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#define WARN_IMPRECISE(x) \
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__warn_references(x, # x " has lower than advertised precision");
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#else
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#define WARN_IMPRECISE(x)
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#endif
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/*
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* Declare the functions as weak variants so that other libraries providing
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* real versions can override them.
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*/
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#define DECLARE_WEAK(x)\
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__weak_reference(imprecise_## x, x);\
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WARN_IMPRECISE(x)
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long double
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imprecise_powl(long double x, long double y)
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{
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return pow(x, y);
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}
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DECLARE_WEAK(powl);
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#define DECLARE_IMPRECISE(f) \
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long double imprecise_ ## f ## l(long double v) { return f(v); }\
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DECLARE_WEAK(f ## l)
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DECLARE_IMPRECISE(cosh);
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DECLARE_IMPRECISE(erfc);
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DECLARE_IMPRECISE(erf);
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DECLARE_IMPRECISE(lgamma);
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DECLARE_IMPRECISE(sinh);
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DECLARE_IMPRECISE(tanh);
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DECLARE_IMPRECISE(tgamma);
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