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
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
/* Test of isinf() function.
$Id: isinf-01.c,v 1.1.2.1 2008/03/20 21:42:30 joerg_wunsch Exp $
*/
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include "progmem.h"
#ifndef __AVR__
# define PRINTFLN(fmt, ...) \
printf ("\nLine %d: " fmt "\n", __LINE__, ##__VA_ARGS__)
# define EXIT(code) exit ((code) < 255 ? (code) : 100 + (code) % 100)
#else
# if defined(__AVR_ATmega128__)
/* ATmega128 has enough RAM for sprintf(), print to 0x2000 in XRAM. */
# define PRINTFLN(fmt, ...) \
sprintf ((char *)0x2000, "\nLine %d: " fmt "\n", __LINE__, ##__VA_ARGS__)
# else
/* small AVR */
# define PRINTFLN(args...)
# endif
# define EXIT exit
#endif
union lofl_u {
long lo;
float fl;
};
/* Result is placed into SRAM variable, allocated at the start of
memory. This is convinient to debug: read a core dump. */
volatile int v = 1;
PROGMEM const struct { /* Table of test cases. */
union lofl_u x; /* argument */
int z; /* result */
} t[] = {
/* Zero */
{ { .fl= +0.0 }, 0 },
{ { .fl= -0.0 }, 0 },
/* A few of normal values */
{ { 0x00800000 }, 0 },
{ { 0x00800001 }, 0 },
{ { 0x00ffffff }, 0 },
{ { 0x3f800000 }, 0 },
{ { 0x7f7fffff }, 0 },
{ { 0x80800000 }, 0 },
{ { 0x80800001 }, 0 },
{ { 0x80ffffff }, 0 },
{ { 0xdf800000 }, 0 },
{ { 0xff7fffff }, 0 },
/* Subnormal */
{ { 0x00000001 }, 0 },
{ { 0x00000100 }, 0 },
{ { 0x00010000 }, 0 },
{ { 0x007fffff }, 0 },
{ { 0x80000001 }, 0 },
{ { 0x80000100 }, 0 },
{ { 0x80010000 }, 0 },
{ { 0x807fffff }, 0 },
/* Inf */
{ { 0x7f800000 }, 1 },
{ { 0xff800000 }, -1 },
/* NaN */
{ { 0x7f800001 }, 0 },
{ { 0x7fc00000 }, 0 },
{ { 0x7fffffff }, 0 },
{ { 0xff800001 }, 0 },
{ { 0xffc00000 }, 0 },
{ { 0xffffffff }, 0 },
};
int main ()
{
union lofl_u x;
int z;
int i;
/* Default implementation. */
for (i = 0; i < (int) (sizeof(t) / sizeof(t[0])); i++) {
x.lo = pgm_read_dword (& t[i].x);
z = pgm_read_word (& t[i].z);
v = isinf (x.fl);
if (v != z) {
PRINTFLN ("i= %d v= %d", i, v);
EXIT (i + 1);
}
}
#ifdef __AVR__
{
int (* volatile vp)(double);
/* Force to use the library implementation. */
vp = & isinf;
for (i = 0; i < (int) (sizeof(t) / sizeof(t[0])); i++) {
x.lo = pgm_read_dword (& t[i].x);
z = pgm_read_word (& t[i].z);
v = vp (x.fl);
if (v != z) {
PRINTFLN ("i= %d v= %d", i, v);
EXIT (i + 101);
}
}
}
#endif
return 0;
}
|
