lrint_test.c revision 315121 
1/*-
2 * Copyright (c) 2005-2008 David Schultz <das@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27/*
28 * Test for lrint(), lrintf(), llrint(), and llrintf().
29 */
30
31#include <sys/cdefs.h>
32__FBSDID("$FreeBSD: stable/11/lib/msun/tests/lrint_test.c 315121 2017-03-12 04:52:09Z ngie $");
33
34#include <assert.h>
35#include <fenv.h>
36#include <limits.h>
37#include <math.h>
38#include <stdio.h>
39
40#ifdef	__i386__
41#include <ieeefp.h>
42#endif
43
44/*
45 * XXX The volatile here is to avoid gcc's bogus constant folding and work
46 *     around the lack of support for the FENV_ACCESS pragma.
47 */
48#define	test(func, x, result, excepts)	do {				\
49	volatile double _d = x;						\
50	assert(feclearexcept(FE_ALL_EXCEPT) == 0);			\
51	assert((func)(_d) == (result) || fetestexcept(FE_INVALID));	\
52	assert(fetestexcept(FE_ALL_EXCEPT) == (excepts));		\
53} while (0)
54
55#define	testall(x, result, excepts)	do {				\
56	test(lrint, x, result, excepts);				\
57	test(lrintf, x, result, excepts);				\
58	test(lrintl, x, result, excepts);				\
59	test(llrint, x, result, excepts);				\
60	test(llrintf, x, result, excepts);				\
61	test(llrintl, x, result, excepts);				\
62} while (0)
63
64#define	IGNORE	0
65
66#pragma STDC FENV_ACCESS ON
67
68static void
69run_tests(void)
70{
71
72	assert(fesetround(FE_DOWNWARD) == 0);
73	testall(0.75, 0, FE_INEXACT);
74	testall(-0.5, -1, FE_INEXACT);
75
76	assert(fesetround(FE_TONEAREST) == 0);
77	testall(0.0, 0, 0);
78	testall(0.25, 0, FE_INEXACT);
79	testall(0.5, 0, FE_INEXACT);
80	testall(-2.5, -2, FE_INEXACT);
81	testall(1.0, 1, 0);
82	testall(0x12345000p0, 0x12345000, 0);
83	testall(0x1234.fp0, 0x1235, FE_INEXACT);
84	testall(INFINITY, IGNORE, FE_INVALID);
85	testall(NAN, IGNORE, FE_INVALID);
86
87#if (LONG_MAX == 0x7fffffffl)
88	assert(fesetround(FE_UPWARD) == 0);
89	test(lrint, 0x7fffffff.8p0, IGNORE, FE_INVALID);
90	test(lrint, -0x80000000.4p0, -0x80000000l, FE_INEXACT);
91
92	assert(fesetround(FE_DOWNWARD) == 0);
93	test(lrint, -0x80000000.8p0, IGNORE, FE_INVALID);
94	test(lrint, 0x80000000.0p0, IGNORE, FE_INVALID);
95	test(lrint, 0x7fffffff.4p0, 0x7fffffffl, FE_INEXACT);
96	test(lrintf, 0x80000000.0p0f, IGNORE, FE_INVALID);
97	test(lrintf, 0x7fffff80.0p0f, 0x7fffff80l, 0);
98
99	assert(fesetround(FE_TOWARDZERO) == 0);
100	test(lrint, 0x7fffffff.8p0,  0x7fffffffl, FE_INEXACT);
101	test(lrint, -0x80000000.8p0, -0x80000000l, FE_INEXACT);
102	test(lrint, 0x80000000.0p0, IGNORE, FE_INVALID);
103	test(lrintf, 0x80000000.0p0f, IGNORE, FE_INVALID);
104	test(lrintf, 0x7fffff80.0p0f, 0x7fffff80l, 0);
105#elif (LONG_MAX == 0x7fffffffffffffffll)
106	assert(fesetround(FE_TONEAREST) == 0);
107	test(lrint, 0x8000000000000000.0p0, IGNORE, FE_INVALID);
108	test(lrintf, 0x8000000000000000.0p0f, IGNORE, FE_INVALID);
109	test(lrint, 0x7ffffffffffffc00.0p0, 0x7ffffffffffffc00l, 0);
110	test(lrintf, 0x7fffff8000000000.0p0f, 0x7fffff8000000000l, 0);
111	test(lrint, -0x8000000000000800.0p0, IGNORE, FE_INVALID);
112	test(lrintf, -0x8000010000000000.0p0f, IGNORE, FE_INVALID);
113	test(lrint, -0x8000000000000000.0p0, -0x8000000000000000l, 0);
114	test(lrintf, -0x8000000000000000.0p0f, -0x8000000000000000l, 0);
115#else
116#error "Unsupported long size"
117#endif
118
119#if (LLONG_MAX == 0x7fffffffffffffffLL)
120	assert(fesetround(FE_TONEAREST) == 0);
121	test(llrint, 0x8000000000000000.0p0, IGNORE, FE_INVALID);
122	test(llrintf, 0x8000000000000000.0p0f, IGNORE, FE_INVALID);
123	test(llrint, 0x7ffffffffffffc00.0p0, 0x7ffffffffffffc00ll, 0);
124	test(llrintf, 0x7fffff8000000000.0p0f, 0x7fffff8000000000ll, 0);
125	test(llrint, -0x8000000000000800.0p0, IGNORE, FE_INVALID);
126	test(llrintf, -0x8000010000000000.0p0f, IGNORE, FE_INVALID);
127	test(llrint, -0x8000000000000000.0p0, -0x8000000000000000ll, 0);
128	test(llrintf, -0x8000000000000000.0p0f, -0x8000000000000000ll, 0);
129#else
130#error "Unsupported long long size"
131#endif
132}
133
134int
135main(void)
136{
137
138	printf("1..1\n");
139
140	run_tests();
141#ifdef	__i386__
142	fpsetprec(FP_PE);
143	run_tests();
144#endif
145
146	printf("ok 1 - lrint\n");
147
148	return (0);
149}
150