summaryrefslogtreecommitdiff
path: root/sys/src/cmd/cc/bits.c
blob: a22ba5125913d1ea4c7920a2f0ade6c1ffcfe05d (plain)
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
#include	"cc.h"

Bits
bor(Bits a, Bits b)
{
	Bits c;
	int i;

	for(i=0; i<BITS; i++)
		c.b[i] = a.b[i] | b.b[i];
	return c;
}

Bits
band(Bits a, Bits b)
{
	Bits c;
	int i;

	for(i=0; i<BITS; i++)
		c.b[i] = a.b[i] & b.b[i];
	return c;
}

/*
Bits
bnot(Bits a)
{
	Bits c;
	int i;

	for(i=0; i<BITS; i++)
		c.b[i] = ~a.b[i];
	return c;
}
*/

int
bany(Bits *a)
{
	int i;

	for(i=0; i<BITS; i++)
		if(a->b[i])
			return 1;
	return 0;
}

int
beq(Bits a, Bits b)
{
	int i;

	for(i=0; i<BITS; i++)
		if(a.b[i] != b.b[i])
			return 0;
	return 1;
}

int
bnum(Bits a)
{
	int i;
	long b;

	for(i=0; i<BITS; i++)
		if(b = a.b[i])
			return 32*i + bitno(b);
	diag(Z, "bad in bnum");
	return 0;
}

Bits
blsh(uint n)
{
	Bits c;

	c = zbits;
	c.b[n/32] = 1L << (n%32);
	return c;
}

int
bset(Bits a, uint n)
{
	if(a.b[n/32] & (1L << (n%32)))
		return 1;
	return 0;
}