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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("$FreeBSD$");
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
68 void
69 run_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
134 int
135 main(int argc, char *argv[])
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 }