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
|
/* Test of division. Simple cases.
$Id: div-01.c,v 1.1 2007/02/05 21:35:58 dmix Exp $
*/
#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: x / y = z */
union lofl_u x, y, z;
} t[] = {
/* 0.0 / nonzero */
{ { 0x00000000 }, { 0x00000001 }, { 0x00000000 } },
{ { 0x00000000 }, { 0x007fffff }, { 0x00000000 } },
{ { 0x00000000 }, { 0x00800000 }, { 0x00000000 } },
{ { 0x00000000 }, { 0x7f7fffff }, { 0x00000000 } },
{ { 0x00000000 }, { 0x80000001 }, { 0x80000000 } },
{ { 0x00000000 }, { 0x807fffff }, { 0x80000000 } },
{ { 0x00000000 }, { 0x80800000 }, { 0x80000000 } },
{ { 0x00000000 }, { 0xff7fffff }, { 0x80000000 } },
/* -0.0 / nonzero */
{ { 0x80000000 }, { 0x3f800000 }, { 0x80000000 } },
{ { 0x80000000 }, { 0xbf800000 }, { 0x00000000 } },
/* x / +1.0 --> x */
{ { 0x00000000 }, { .fl = +1.0 }, { 0x00000000 } },
{ { 0x00000001 }, { .fl = +1.0 }, { 0x00000001 } },
{ { 0x00000100 }, { .fl = +1.0 }, { 0x00000100 } },
{ { 0x00010000 }, { .fl = +1.0 }, { 0x00010000 } },
{ { 0x007fffff }, { .fl = +1.0 }, { 0x007fffff } },
{ { 0x00800000 }, { .fl = +1.0 }, { 0x00800000 } },
{ { 0x3f800000 }, { .fl = +1.0 }, { 0x3f800000 } },
{ { 0x7f7fffff }, { .fl = +1.0 }, { 0x7f7fffff } },
{ { 0x80000000 }, { .fl = +1.0 }, { 0x80000000 } },
{ { 0x80000001 }, { .fl = +1.0 }, { 0x80000001 } },
{ { 0x80000100 }, { .fl = +1.0 }, { 0x80000100 } },
{ { 0x80010000 }, { .fl = +1.0 }, { 0x80010000 } },
{ { 0x807fffff }, { .fl = +1.0 }, { 0x807fffff } },
{ { 0x80800000 }, { .fl = +1.0 }, { 0x80800000 } },
{ { 0xbf800000 }, { .fl = +1.0 }, { 0xbf800000 } },
{ { 0xff7fffff }, { .fl = +1.0 }, { 0xff7fffff } },
/* x / -1.0 --> -x */
{ { 0x00000000 }, { .fl = -1.0 }, { 0x80000000 } },
{ { 0x00000001 }, { .fl = -1.0 }, { 0x80000001 } },
{ { 0x00000100 }, { .fl = -1.0 }, { 0x80000100 } },
{ { 0x00010000 }, { .fl = -1.0 }, { 0x80010000 } },
{ { 0x007fffff }, { .fl = -1.0 }, { 0x807fffff } },
{ { 0x00800000 }, { .fl = -1.0 }, { 0x80800000 } },
{ { 0x3f800000 }, { .fl = -1.0 }, { 0xbf800000 } },
{ { 0x7f7fffff }, { .fl = -1.0 }, { 0xff7fffff } },
{ { 0x80000000 }, { .fl = -1.0 }, { 0x00000000 } },
{ { 0x80000001 }, { .fl = -1.0 }, { 0x00000001 } },
{ { 0x80000100 }, { .fl = -1.0 }, { 0x00000100 } },
{ { 0x80010000 }, { .fl = -1.0 }, { 0x00010000 } },
{ { 0x807fffff }, { .fl = -1.0 }, { 0x007fffff } },
{ { 0x80800000 }, { .fl = -1.0 }, { 0x00800000 } },
{ { 0xbf800000 }, { .fl = -1.0 }, { 0x3f800000 } },
{ { 0xff7fffff }, { .fl = -1.0 }, { 0x7f7fffff } },
/* x/x --> 1.0 */
{ { 0x00000001 }, { 0x00000001 }, { .fl = +1.0 } },
{ { 0x00000100 }, { 0x00000100 }, { .fl = +1.0 } },
{ { 0x00010000 }, { 0x00010000 }, { .fl = +1.0 } },
{ { 0x007fffff }, { 0x007fffff }, { .fl = +1.0 } },
{ { 0x00800000 }, { 0x00800000 }, { .fl = +1.0 } },
{ { 0x3f800000 }, { 0x3f800000 }, { .fl = +1.0 } },
{ { 0x7f7fffff }, { 0x7f7fffff }, { .fl = +1.0 } },
{ { 0x80000001 }, { 0x80000001 }, { .fl = +1.0 } },
{ { 0x80000100 }, { 0x80000100 }, { .fl = +1.0 } },
{ { 0x80010000 }, { 0x80010000 }, { .fl = +1.0 } },
{ { 0x807fffff }, { 0x807fffff }, { .fl = +1.0 } },
{ { 0x80800000 }, { 0x80800000 }, { .fl = +1.0 } },
{ { 0xbf800000 }, { 0xbf800000 }, { .fl = +1.0 } },
{ { 0xff7fffff }, { 0xff7fffff }, { .fl = +1.0 } },
};
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,z;
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);
z.lo = pgm_read_dword (& t[i].z);
v.fl = x.fl / y.fl;
/* Comparison is integer to verify the zero sign. */
if (v.lo != z.lo)
x_exit (i+1);
}
return 0;
}
|
