| /*- |
| * 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(cosh); |
| DECLARE_IMPRECISE(erfc); |
| DECLARE_IMPRECISE(erf); |
| DECLARE_IMPRECISE(lgamma); |
| DECLARE_IMPRECISE(sinh); |
| DECLARE_IMPRECISE(tanh); |
| DECLARE_IMPRECISE(tgamma); |
