minix/tests/lib/libm/t_round.c
Lionel Sambuc 11be35a165 Importing NetBSD "Kyua" test framework
To do so, a few dependencies have been imported:

 * external/bsd/lutok
 * external/mit/lua
 * external/public-domain/sqlite
 * external/public-domain/xz

The Kyua framework is the new generation of ATF (Automated Test
Framework), it is composed of:

 * external/bsd/atf
 * external/bsd/kyua-atf-compat
 * external/bsd/kyua-cli
 * external/bsd/kyua-tester
 * tests

Kyua/ATF being written in C++, it depends on libstdc++ which is
provided by GCC. As this is not part of the sources, Kyua is only
compiled when the native GCC utils are installed.

To install Kyua do the following:

 * In a cross-build enviromnent, add the following to the build.sh
   commandline: -V MKBINUTILS=yes -V MKGCCCMDS=yes

WARNING:
  At this point the import is still experimental, and not supported
  on native builds (a.k.a make build).

Change-Id: I26aee23c5bbd2d64adcb7c1beb98fe0d479d7ada
2013-07-23 20:43:41 +02:00

78 lines
2.3 KiB
C

/* $NetBSD: t_round.c,v 1.3 2011/09/13 08:58:41 jruoho Exp $ */
/*-
* Copyright (c) 2011 The NetBSD Foundation, Inc.
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#include <atf-c.h>
#include <math.h>
/*
* This tests for a bug in the initial implementation where
* precision was lost in an internal substraction, leading to
* rounding into the wrong direction.
*/
/* 0.5 - EPSILON */
#define VAL 0x0.7ffffffffffffcp0
#define VALF 0x0.7fffff8p0
#ifdef __vax__
#define SMALL_NUM 1.0e-38
#else
#define SMALL_NUM 1.0e-40
#endif
ATF_TC(round_dir);
ATF_TC_HEAD(round_dir, tc)
{
atf_tc_set_md_var(tc, "descr","Check for rounding in wrong direction");
}
ATF_TC_BODY(round_dir, tc)
{
double a = VAL, b, c;
float af = VALF, bf, cf;
b = round(a);
bf = roundf(af);
ATF_CHECK(fabs(b) < SMALL_NUM);
ATF_CHECK(fabsf(bf) < SMALL_NUM);
c = round(-a);
cf = roundf(-af);
ATF_CHECK(fabs(c) < SMALL_NUM);
ATF_CHECK(fabsf(cf) < SMALL_NUM);
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, round_dir);
return atf_no_error();
}