11dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/*- 21dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Copyright (c) 2004 David Schultz <das@FreeBSD.ORG> 31dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * All rights reserved. 41dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 51dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * Redistribution and use in source and binary forms, with or without 61dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * modification, are permitted provided that the following conditions 71dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * are met: 81dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 1. Redistributions of source code must retain the above copyright 91dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer. 101dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 2. Redistributions in binary form must reproduce the above copyright 111dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * notice, this list of conditions and the following disclaimer in the 121dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * documentation and/or other materials provided with the distribution. 131dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * 141dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 151dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 161dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 171dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 181dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 191dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 201dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 211dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 221dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 231dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 241dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * SUCH DAMAGE. 251dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 261dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 271dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <sys/cdefs.h> 28a0ee07829a9ba7e99ef68e8c12551301cc797f0fElliott Hughes__FBSDID("$FreeBSD$"); 291dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 301dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <fenv.h> 311dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#include <math.h> 321dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 331dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project/* 341dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * We save and restore the floating-point environment to avoid raising 351dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * an inexact exception. We can get away with using fesetenv() 361dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * instead of feclearexcept()/feupdateenv() to restore the environment 371dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * because the only exception defined for rint() is overflow, and 381dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project * rounding can't overflow as long as emax >= p. 3978419467a2f88744ae2445fca5eb442877ebb1b0Elliott Hughes * 4078419467a2f88744ae2445fca5eb442877ebb1b0Elliott Hughes * The volatile keyword is needed below because clang incorrectly assumes 4178419467a2f88744ae2445fca5eb442877ebb1b0Elliott Hughes * that rint won't raise any floating-point exceptions. Declaring ret volatile 4278419467a2f88744ae2445fca5eb442877ebb1b0Elliott Hughes * is sufficient to trick the compiler into doing the right thing. 431dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project */ 441dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project#define DECL(type, fn, rint) \ 451dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projecttype \ 461dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Projectfn(type x) \ 471dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project{ \ 4878419467a2f88744ae2445fca5eb442877ebb1b0Elliott Hughes volatile type ret; \ 491dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project fenv_t env; \ 501dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project \ 511dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project fegetenv(&env); \ 521dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project ret = rint(x); \ 531dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project fesetenv(&env); \ 541dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project return (ret); \ 551dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project} 561dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source Project 571dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source ProjectDECL(double, nearbyint, rint) 581dc9e472e19acfe6dc7f41e429236e7eef7ceda1The Android Open Source ProjectDECL(float, nearbyintf, rintf) 59a0ee07829a9ba7e99ef68e8c12551301cc797f0fElliott HughesDECL(long double, nearbyintl, rintl) 60