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/*-
* Copyright (c) 2013 David Chisnall
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
#include <float.h>
#include <math.h>
/*
* If long double is not the same size as double, then these will lose
* precision and we should emit a warning whenever something links against
* them.
*/
#if (LDBL_MANT_DIG > 53)
#define WARN_IMPRECISE(x) \
__warn_references(x, # x " has lower than advertised precision");
#else
#define WARN_IMPRECISE(x)
#endif
/*
* Declare the functions as weak variants so that other libraries providing
* real versions can override them.
*/
#define DECLARE_WEAK(x)\
__weak_reference(imprecise_## x, x);\
WARN_IMPRECISE(x)
long double
imprecise_powl(long double x, long double y)
{
return pow(x, y);
}
DECLARE_WEAK(powl);
#define DECLARE_IMPRECISE(f) \
long double imprecise_ ## f ## l(long double v) { return f(v); }\
DECLARE_WEAK(f ## l)
DECLARE_IMPRECISE(lgamma);
DECLARE_IMPRECISE(tgamma);
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