1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
|
/* Test of fmod() function. NaNs.
$Id: fmod-nan.c,v 1.1 2007/02/05 21:35:58 dmix Exp $
*/
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include "progmem.h"
union lofl_u {
long lo;
float fl;
};
volatile union lofl_u v = { .lo = 1 };
PROGMEM const struct { /* Table of test cases. */
union lofl_u x, y; /* args. */
} t[] = {
/* fmod (finite, 0) --> NaN */
{ { 0x00000001 }, { 0x00000000 } },
{ { 0x007fffff }, { 0x00000000 } },
{ { 0x00800000 }, { 0x00000000 } },
{ { 0x7f7fffff }, { 0x00000000 } },
{ { 0x3f800000 }, { 0x80000000 } },
{ { 0xbf800000 }, { 0x00000000 } },
{ { 0xbf800000 }, { 0x80000000 } },
/* fmod (Inf, 0) --> NaN */
{ { 0x7f800000 }, { 0x00000000 } },
{ { 0x7f800000 }, { 0x80000000 } },
{ { 0xff800000 }, { 0x00000000 } },
{ { 0xff800000 }, { 0x80000000 } },
/* fmod (Inf, Inf) --> NaN */
{ { 0x7f800000 }, { 0x7f800000 } },
{ { 0x7f800000 }, { 0xff800000 } },
{ { 0xff800000 }, { 0x7f800000 } },
{ { 0xff800000 }, { 0xff800000 } },
/* fmod (NaN, 1) --> NaN */
{ { 0x7f800001 }, { 0x3f800000 } },
{ { 0x7f800100 }, { 0x3f800000 } },
{ { 0x7f810000 }, { 0x3f800000 } },
{ { 0x7fc00000 }, { 0x3f800000 } },
{ { 0x7fffffff }, { 0x3f800000 } },
{ { 0xff800001 }, { 0x3f800000 } },
{ { 0xff800100 }, { 0x3f800000 } },
{ { 0xff810000 }, { 0x3f800000 } },
{ { 0xffc00000 }, { 0x3f800000 } },
{ { 0xffffffff }, { 0x3f800000 } },
/* fmod (1, NaN) --> NaN */
{ { 0x3f800000 }, { 0x7f800001 } },
{ { 0x3f800000 }, { 0x7f800100 } },
{ { 0x3f800000 }, { 0x7f810000 } },
{ { 0x3f800000 }, { 0x7fc00000 } },
{ { 0x3f800000 }, { 0x7fffffff } },
{ { 0x3f800000 }, { 0xff800001 } },
{ { 0x3f800000 }, { 0xff800100 } },
{ { 0x3f800000 }, { 0xff810000 } },
{ { 0x3f800000 }, { 0xffc00000 } },
{ { 0x3f800000 }, { 0xffffffff } },
};
void x_exit (int index)
{
#ifndef __AVR__
fprintf (stderr, "t[%d]: %#lx\n", index - 1, v.lo);
#endif
exit (index ? index : -1);
}
int main ()
{
union lofl_u x, y;
int i;
for (i = 0; i < (int) (sizeof(t) / sizeof(t[0])); i++) {
x.lo = pgm_read_dword (& t[i].x);
y.lo = pgm_read_dword (& t[i].y);
v.fl = fmod (x.fl, y.fl);
if (!isnan(v.fl))
x_exit (i+1);
}
return 0;
}
|
